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Oregon State University
1.
Collins, Lee E.
Modeling Arctic melt ponds using a resolved ice model with GCM forcing.
Degree: MS, Ocean, Earth, and Atmospheric Sciences, 2013, Oregon State University
URL: http://hdl.handle.net/1957/44613 
► The albedo of Arctic sea ice depends greatly on the formation of melt ponds. These ponds form in depressions on the ice as surface snow…
(more)
▼ The albedo of
Arctic sea ice depends greatly on the formation of melt ponds. These ponds form in depressions on the ice as surface snow melts during the summer months, and their location is determined mainly by the initial snow topography. Using a high resolution sea ice model forced with data taken from the Atmospheric Radiation Measurement (ARM) site in Barrow, AK, we investigate how specific factors, both internal model parameters and initial conditions, affect the evolution of melt ponds on
Arctic sea ice. We also use forcing data taken from output of the Community Earth Systems Model (CESM) to investigate the differences in melt pond parametrization between our model and CESM. The resolved model uses a unique and innovative approach in pond modeling, the "trigger depth" method, to initiate pond drainage. Results from sensitivity analysis on the trigger depth show the validity of this new approach, suggesting it could be useful in other ice models. The initial snowpack has a very large role in pond formation and extent. We use surface topography gathered from LiDAR scans from the ARM site to provide a realistic snowpack surface. For our sensitivity analysis of the total initial amount of snow in the model, we alter only the minimum thickness of the snow on top of the ice, retaining a consistent surface topography for each simulation. The LiDAR topography from the ARM site provides a more realistic approach to the pond model, as opposed to a randomly generated method of creating snow topography. Large initial snowpack inhibits the formation of deep channels in the ice, reducing pond fraction at the end of the melt season. Finally, we force the resolved model simulations with data from CESM and compare the pond behavior to that of CESM. CESM does an unrealistic job of representing melt ponds, partially due to the way melt ponds are parametrized in the model, using a "thickness-class" method for creating and categorizing melt ponds. CESM pond formation occurs over a much broader time span compared to observations and our resolved model. Results from this work will be used to investigate and possibly improve the melt pond parametrization in CESM.
Advisors/Committee Members: Shell, Karen (advisor), Shroyer, Emily (committee member).
Subjects/Keywords: Arctic; Sea ice – Arctic regions
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APA (6th Edition):
Collins, L. E. (2013). Modeling Arctic melt ponds using a resolved ice model with GCM forcing. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/44613
Chicago Manual of Style (16th Edition):
Collins, Lee E. “Modeling Arctic melt ponds using a resolved ice model with GCM forcing.” 2013. Masters Thesis, Oregon State University. Accessed March 05, 2021.
http://hdl.handle.net/1957/44613.
MLA Handbook (7th Edition):
Collins, Lee E. “Modeling Arctic melt ponds using a resolved ice model with GCM forcing.” 2013. Web. 05 Mar 2021.
Vancouver:
Collins LE. Modeling Arctic melt ponds using a resolved ice model with GCM forcing. [Internet] [Masters thesis]. Oregon State University; 2013. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1957/44613.
Council of Science Editors:
Collins LE. Modeling Arctic melt ponds using a resolved ice model with GCM forcing. [Masters Thesis]. Oregon State University; 2013. Available from: http://hdl.handle.net/1957/44613
Queens University
2.
Buckley, Emma.
Spatial and temporal patterns of net carbon exchange in the polar semi-desert vegetation type on Melville Island, Nunavut
.
Degree: Geography, 2015, Queens University
URL: http://hdl.handle.net/1974/13855
► While studies of mesic tundra vegetation types across latitudinal gradients have shown decreasing levels of net ecosystem exchange (NEE) of carbon dioxide at more northern…
(more)
▼ While studies of mesic tundra vegetation types across latitudinal gradients have shown decreasing levels of net ecosystem exchange (NEE) of carbon dioxide at more northern sites, little work has explored the factors regulating NEE in the polar semi-desert, a vegetation type which is widely distributed across the High Arctic. In 2013, eight ADC Automated Carbon Exchange (ACE) systems were deployed at the Cape Bounty Arctic Watershed Observatory (CBAWO) to quantify the contribution of the polar semi-desert vegetation type to landscape-scale NEE. As polar semi-desert vegetation cover varies at relatively small spatial scales, the chambers were distributed between vegetated areas (18-51% cover) and bare soil. Measurements were made every 30 minutes from late May to late July. Air temperature, soil temperature, and soil moisture measurements were collected in conjunction with NEE and ecosystem respiration (Re). In July 2013, Normalized Difference Vegetation Index (NDVI) data were collected to quantify variability in vegetation cover within the polar semi-desert. NDVI varied from -0.12 to 0.31, with the highest values occurring at vegetated sites and low values occurring on bare soil. Percent vegetation cover and NDVI correlated well at peak biomass (R2 = 0.96).
NEE is driven by variability of several biophysical factors, and the factors that best predict NEE vary throughout the season. In the early season, respiration drives NEE, and air temperature is the strongest predictor (R2 = 0.23 to 0.55). During the warmer part of the season, photosynthesis is the dominant component of NEE, and photosynthetically active radiation becomes the best predictor. Results suggest that once a threshold temperature is reached photosynthesis will dominate NEE in polar semi-desert vegetation types. Therefore, longer growing seasons, if associated with higher temperatures, would enhance NEE. These relationships may be useful for quantifying NEE in polar semi-deserts using remotely-sensed data in future studies.
Subjects/Keywords: NEE
;
Arctic
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APA (6th Edition):
Buckley, E. (2015). Spatial and temporal patterns of net carbon exchange in the polar semi-desert vegetation type on Melville Island, Nunavut
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/13855
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Buckley, Emma. “Spatial and temporal patterns of net carbon exchange in the polar semi-desert vegetation type on Melville Island, Nunavut
.” 2015. Thesis, Queens University. Accessed March 05, 2021.
http://hdl.handle.net/1974/13855.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Buckley, Emma. “Spatial and temporal patterns of net carbon exchange in the polar semi-desert vegetation type on Melville Island, Nunavut
.” 2015. Web. 05 Mar 2021.
Vancouver:
Buckley E. Spatial and temporal patterns of net carbon exchange in the polar semi-desert vegetation type on Melville Island, Nunavut
. [Internet] [Thesis]. Queens University; 2015. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1974/13855.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Buckley E. Spatial and temporal patterns of net carbon exchange in the polar semi-desert vegetation type on Melville Island, Nunavut
. [Thesis]. Queens University; 2015. Available from: http://hdl.handle.net/1974/13855
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Oregon State University
3.
Koenker, Brittany L.
Growth, Condition, and Survival of Larval Arctic Cod and Walleye Pollock in a Warming Ocean.
Degree: MS, 2017, Oregon State University
URL: http://hdl.handle.net/1957/61842
► Arctic cod (Boreogadus saida) is an ecologically significant species that plays a critical role channeling energy throughout the Arctic marine food web. Arctic cod is…
(more)
▼ Arctic cod (Boreogadus saida) is an ecologically significant species that plays a critical role channeling energy throughout the
Arctic marine food web.
Arctic cod is uniquely adapted to occupy ice edge habitats, however, a basic understanding of its larval physiology and habitat requirements is lacking due to widespread sea ice cover which limits spring field sampling. Forecasted shrinkage of sea ice habitat could facilitate invasions of non-ice-obligate North Pacific gadids, such as walleye pollock (Gadus chalcogrammus). By assessing the sensitivity of the early life stages of fish species to environmental conditions affecting growth (i.e., temperature and food availability), it is possible to better understand larval survival, and thus the factors dictating success of the population in the face of climate change. To this aim, I conducted laboratory experiments to directly examine the growth and survival of
Arctic cod and walleye pollock at two larval stages in response to forecasted changes in temperature and food availability. Critical rates obtained from these experiments demonstrate that larval
Arctic cod has a competitive advantage over walleye pollock in terms of growth and survival at low temperatures. However, rising temperatures and altered productivity regimes associated with climate change have the potential to constrain the habitat that is available to
Arctic cod.
Temperature-dependent growth models developed from this study emphasize the species-specific and stage-specific differences in the growth of larval gadids and provide a baseline for examining temperature-dependent growth in the field. Following laboratory experiments, I examined the morphometric and lipid condition of each species under the same experimental conditions, to investigate the effects of temperature and food availability on larval fish condition and the suitability of different condition indices. Temperature and food availability impacted larval condition and lipid storage in a species-dependent manner. Furthermore, later stage larval condition was more sensitive to changes in prey availability at higher temperatures, indicating that larval condition may be negatively impacted under a climate change scenario of combined warming and reduced availability of lipid-rich prey. Collectively, the physiological rates determined within my thesis will add to a better understanding of the mechanisms affecting condition and survival of gadid larvae at the
Arctic-boreal interface. Knowledge of the habitat requirements of these ecological important species is essential for effective resource management, and is key to understanding the broader implications of global change.
Advisors/Committee Members: Copeman, Louise A. (advisor), Laurel, Benjamin J. (committee member).
Subjects/Keywords: Arctic cod
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APA (6th Edition):
Koenker, B. L. (2017). Growth, Condition, and Survival of Larval Arctic Cod and Walleye Pollock in a Warming Ocean. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/61842
Chicago Manual of Style (16th Edition):
Koenker, Brittany L. “Growth, Condition, and Survival of Larval Arctic Cod and Walleye Pollock in a Warming Ocean.” 2017. Masters Thesis, Oregon State University. Accessed March 05, 2021.
http://hdl.handle.net/1957/61842.
MLA Handbook (7th Edition):
Koenker, Brittany L. “Growth, Condition, and Survival of Larval Arctic Cod and Walleye Pollock in a Warming Ocean.” 2017. Web. 05 Mar 2021.
Vancouver:
Koenker BL. Growth, Condition, and Survival of Larval Arctic Cod and Walleye Pollock in a Warming Ocean. [Internet] [Masters thesis]. Oregon State University; 2017. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1957/61842.
Council of Science Editors:
Koenker BL. Growth, Condition, and Survival of Larval Arctic Cod and Walleye Pollock in a Warming Ocean. [Masters Thesis]. Oregon State University; 2017. Available from: http://hdl.handle.net/1957/61842
University of Manitoba
4.
Xu, Wen.
Distribution of chloride and bromide across the snow-sea ice-seawater interface in natural and mesocosm environments and its implication for halogen activation in polar regions.
Degree: Environment and Geography, 2015, University of Manitoba
URL: http://hdl.handle.net/1993/30408
► Halogen chemistry in the polar boundary layer has received much scientific attention in recent years due to the observations of high concentrations of reactive halogens…
(more)
▼ Halogen chemistry in the polar boundary layer has received much scientific attention in recent years due to the observations of high concentrations of reactive halogens in springtime. The source of reactive halogens and the site for halogen activation remain a
subject of debate. In this thesis, chloride, bromide and sodium ions across the snow-sea ice-seawater interface were measured to study the cryospheric halide distribution and halogen activation in the
Arctic. The results show halides/Na+ molar ratios (Br−/Na+ and Cl−/Na+ ratios) in snow are commonly higher than that in seawater, suggesting snow scavenges halides from sources other than sea salt. The decrease in the halides/Na+ ratios in the surface snow layer indicates a loss of halides from the snow, supporting snow as an important substrate for halogen activation. Furthermore, a mechanism for snow-assisted halogen activation is proposed based on the variation of the Br−/Cl− ratio in the snow.
Advisors/Committee Members: Wang, Feiyue (Environment and Geography) (supervisor), Papakyriakou, Tim (Environment and Geography) Rysgaard, Søren (Geological Science) (examiningcommittee).
Subjects/Keywords: Halide; Arctic
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APA (6th Edition):
Xu, W. (2015). Distribution of chloride and bromide across the snow-sea ice-seawater interface in natural and mesocosm environments and its implication for halogen activation in polar regions. (Masters Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/30408
Chicago Manual of Style (16th Edition):
Xu, Wen. “Distribution of chloride and bromide across the snow-sea ice-seawater interface in natural and mesocosm environments and its implication for halogen activation in polar regions.” 2015. Masters Thesis, University of Manitoba. Accessed March 05, 2021.
http://hdl.handle.net/1993/30408.
MLA Handbook (7th Edition):
Xu, Wen. “Distribution of chloride and bromide across the snow-sea ice-seawater interface in natural and mesocosm environments and its implication for halogen activation in polar regions.” 2015. Web. 05 Mar 2021.
Vancouver:
Xu W. Distribution of chloride and bromide across the snow-sea ice-seawater interface in natural and mesocosm environments and its implication for halogen activation in polar regions. [Internet] [Masters thesis]. University of Manitoba; 2015. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1993/30408.
Council of Science Editors:
Xu W. Distribution of chloride and bromide across the snow-sea ice-seawater interface in natural and mesocosm environments and its implication for halogen activation in polar regions. [Masters Thesis]. University of Manitoba; 2015. Available from: http://hdl.handle.net/1993/30408
Delft University of Technology
5.
Schulz, A. (author).
SAR Retracking in the Arctic: Development of a year round Arctic SAR retracker system.
Degree: 2016, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:eb180cb5-348f-4c12-bc54-5b23c62784f6
► The sea level determination in the Arctic brings challenges with it, due to its high seasonality, varying surface types and scarce in-situ observations. By developing…
(more)
▼ The sea level determination in the Arctic brings challenges with it, due to its high seasonality, varying surface types and scarce in-situ observations. By developing a year round retracker system with an implementation of a bias removal strategy, the Arctic sea level determination is improved. Through the analysis of the seasonal performance of retrackers, an insight into the behaviour of empirical and physical retrackers is gained that can be used in the selection process of optimal retrackers for given conditions and regions.
Spaceflight
Astrodynamics & Space Missions
Aerospace Engineering
Advisors/Committee Members: Naeije, M.C. (mentor).
Subjects/Keywords: SAR; arctic
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APA (6th Edition):
Schulz, A. (. (2016). SAR Retracking in the Arctic: Development of a year round Arctic SAR retracker system. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:eb180cb5-348f-4c12-bc54-5b23c62784f6
Chicago Manual of Style (16th Edition):
Schulz, A (author). “SAR Retracking in the Arctic: Development of a year round Arctic SAR retracker system.” 2016. Masters Thesis, Delft University of Technology. Accessed March 05, 2021.
http://resolver.tudelft.nl/uuid:eb180cb5-348f-4c12-bc54-5b23c62784f6.
MLA Handbook (7th Edition):
Schulz, A (author). “SAR Retracking in the Arctic: Development of a year round Arctic SAR retracker system.” 2016. Web. 05 Mar 2021.
Vancouver:
Schulz A(. SAR Retracking in the Arctic: Development of a year round Arctic SAR retracker system. [Internet] [Masters thesis]. Delft University of Technology; 2016. [cited 2021 Mar 05].
Available from: http://resolver.tudelft.nl/uuid:eb180cb5-348f-4c12-bc54-5b23c62784f6.
Council of Science Editors:
Schulz A(. SAR Retracking in the Arctic: Development of a year round Arctic SAR retracker system. [Masters Thesis]. Delft University of Technology; 2016. Available from: http://resolver.tudelft.nl/uuid:eb180cb5-348f-4c12-bc54-5b23c62784f6
University of Victoria
6.
Bedard, Jeannette.
The role of variable oceanographic and environmental conditions on acoustic tracking effectiveness.
Degree: School of Earth and Ocean Sciences, 2019, University of Victoria
URL: http://hdl.handle.net/1828/11357
► Examining fish behaviour through acoustic tracking is a technique being employed more and more. Typically, research using this method focuses on detections without fully considering…
(more)
▼ Examining fish behaviour through acoustic tracking is a technique being employed more and more. Typically, research using this method focuses on detections without fully considering the influence of both the physical and acoustic environment. Here we link the aquatic environment of Cumberland Sound with factors influencing the detection effectiveness of fish tracking equipment and found multi-path signal interference to be a major issue while seasonal variabilty had little impact. Cumberland Sound is a remote
Arctic embayment, where three species of deep-water fish are currently tracked, that can be considered as two separate layers. Above the 300 m deep sill, the cold Baffin Island Current follows a geostrophic pattern, bending into the sound along the north shore, circulating before leaving along the south shore. The warm deep water is replenished from the recirculated arm of the West Greenland Current occasionally flowing over the sill and down to a stable depth. This influx of water prevents deep water hypoxia, allowing the deep-dwelling fish populations in the sound to thrive. To complement the work done in Cumberland Sound, a year-long study of the underwater soundscape of another
Arctic coastal site, Cambridge Bay, Nunavut, was conducted over 2015. Unlike other
Arctic locations considered to date, this site was louder when covered in ice with the loudest times occurring in April. Sounds of anthropogenic origin were found to dominate the soundscape with ten times more snowmobile traffic on ice than open water boat traffic.
Advisors/Committee Members: Vagle, Svein (supervisor), Dosso, Stanley Edward (supervisor).
Subjects/Keywords: Fish Tracking; Arctic Oceanography; Arctic underwater soundscape
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APA (6th Edition):
Bedard, J. (2019). The role of variable oceanographic and environmental conditions on acoustic tracking effectiveness. (Thesis). University of Victoria. Retrieved from http://hdl.handle.net/1828/11357
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Bedard, Jeannette. “The role of variable oceanographic and environmental conditions on acoustic tracking effectiveness.” 2019. Thesis, University of Victoria. Accessed March 05, 2021.
http://hdl.handle.net/1828/11357.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Bedard, Jeannette. “The role of variable oceanographic and environmental conditions on acoustic tracking effectiveness.” 2019. Web. 05 Mar 2021.
Vancouver:
Bedard J. The role of variable oceanographic and environmental conditions on acoustic tracking effectiveness. [Internet] [Thesis]. University of Victoria; 2019. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1828/11357.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Bedard J. The role of variable oceanographic and environmental conditions on acoustic tracking effectiveness. [Thesis]. University of Victoria; 2019. Available from: http://hdl.handle.net/1828/11357
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
7.
Birdwell, Ian.
Hyperborean Habits and Melting Ice: The Normalization of Arctic Space and Resurgent National Identity.
Degree: MA, International Studies, 2019, Old Dominion University
URL: 9781392268360
;
https://digitalcommons.odu.edu/gpis_etds/108
► The Arctic Council has a robust history of fostering cooperation among its members on a host of environmental and scientific objectives. Yet, as the…
(more)
▼ The
Arctic Council has a robust history of fostering cooperation among its members on a host of environmental and scientific objectives. Yet, as the region has warmed the formerly inaccessible region has become ever easier to access, and
Arctic politics are becoming of greater interest to the global community. In the midst significant change of this the network created by the
Arctic Council continues to advance its cooperative agenda, though increasingly it seems to be experiencing setbacks due to the surges of nationalistic rhetoric on the part of its members. What best explains the transformation of national attitudes and how will such a transformation affect the future of
Arctic politics? This paper argues the national identities of
Arctic states limits the ability of the
Arctic Council to create policy inroads into the national interests of its members in key identity-linked areas such as national defense, resource extraction, and territorial disputes. This propagates a normalization of
Arctic politics, shifting the formerly unique hyperborean political system into something more readily resembling the interactions of
Arctic states below the
Arctic Circle. This is accomplished through a histographical analysis of
Arctic Council policy recommendations, domestic political developments, and international relationships since 1989 between the
Arctic Council and the two most nationalistic
Arctic states, Russia and Canada. Ultimately,
Arctic Council recommendations on issues linked to traditionally cooperative areas such as scientific cooperation and conservation do experience successful integration into member states; however, closely related to power national interests are neglected by states in favor of the pursuit of those interests.
Advisors/Committee Members: Regina Karp, Cathy Wu, Michael Allen.
Subjects/Keywords: Arctic; Arctic council; Identity; Institutions; International Relations
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APA (6th Edition):
Birdwell, I. (2019). Hyperborean Habits and Melting Ice: The Normalization of Arctic Space and Resurgent National Identity. (Thesis). Old Dominion University. Retrieved from 9781392268360 ; https://digitalcommons.odu.edu/gpis_etds/108
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Birdwell, Ian. “Hyperborean Habits and Melting Ice: The Normalization of Arctic Space and Resurgent National Identity.” 2019. Thesis, Old Dominion University. Accessed March 05, 2021.
9781392268360 ; https://digitalcommons.odu.edu/gpis_etds/108.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Birdwell, Ian. “Hyperborean Habits and Melting Ice: The Normalization of Arctic Space and Resurgent National Identity.” 2019. Web. 05 Mar 2021.
Vancouver:
Birdwell I. Hyperborean Habits and Melting Ice: The Normalization of Arctic Space and Resurgent National Identity. [Internet] [Thesis]. Old Dominion University; 2019. [cited 2021 Mar 05].
Available from: 9781392268360 ; https://digitalcommons.odu.edu/gpis_etds/108.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Birdwell I. Hyperborean Habits and Melting Ice: The Normalization of Arctic Space and Resurgent National Identity. [Thesis]. Old Dominion University; 2019. Available from: 9781392268360 ; https://digitalcommons.odu.edu/gpis_etds/108
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Universiteit Utrecht
8.
Menage, K.K.
High Ideals in the High North, Interdependence in a Territory Sui Generis.
Degree: 2012, Universiteit Utrecht
URL: http://dspace.library.uu.nl:8080/handle/1874/237700
► The Arctic used to mainly be of relevance to science. Now, increasingly, it is a matter of economic, political and legal interest. The Arctic is…
(more)
▼ The
Arctic used to mainly be of relevance to science. Now, increasingly, it is a matter of economic, political and legal interest. The
Arctic is experiencing a profound transformation, driven largely by the interacting forces of climate change and globalization. The impact of climate change is difficult to predict with any precision, but it is certain that the demand for
Arctic resources will continue to climb. Countries are preparing to defend their commercial and territorial interests in a region whose strategic significance will boom in the next decade. Natural and man-made change in the region will increasingly compel attention. Most significantly, climate change is challenging the notions of permanency and stability on which the ideal of the sovereign, territorial state has historically rested, gradually, literally uncovering an
Arctic which stands at a crossroads of development and risk and of cooperation or discord.
The question posed in this thesis was:
To what degree are conflicting
Arctic territorial sovereignty claims emerging as a potential security threat?
The answer was attained via the following sub-questions:
• Can territorial expansion be considered the prime source of disharmony in the
Arctic?
• What role does sovereignty play in the
Arctic?
• Does the combination of these two factors (territory and sovereignty) combine in such a way as to form a relevant security threat?
An analysis method was designed and employed in order to discern whether disputes arising from territory and sovereignty issues were likely to develop into either security threats.Trends in the way of increased cooperation or conflict concerning border disputes among
Arctic states hold substantial consequences for the balance of power in the region, affecting patterns of innovation in governance in the
Arctic today and shedding light on the
Arctic of tomorrow. The results attained through the analysis of case studies provide a solid basis from which to hypothesize on how governance of the
Arctic could evolve. The
Arctic is a source of inspiration for legal innovation, as testified by the legal status of the
Arctic as a terra sui generis. The option given in this thesis is an example of a creative solution which states may employ in order to facilitate cooperation in the High North.
At the top of the world, the
Arctic Ocean is cold, remote, and covered in darkness for half the year. It is testing enough to reach the ice-covered ocean, even harder to get under it and down to the seabed. The region's geopolitical challenges are as relevant as its geological mysteries: they are the implications of the development of the planet’s last unspoilt wilderness.
Advisors/Committee Members: Segers, M.M.L..
Subjects/Keywords: Arctic; UNCLOS; sovereignty
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APA (6th Edition):
Menage, K. K. (2012). High Ideals in the High North, Interdependence in a Territory Sui Generis. (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/237700
Chicago Manual of Style (16th Edition):
Menage, K K. “High Ideals in the High North, Interdependence in a Territory Sui Generis.” 2012. Masters Thesis, Universiteit Utrecht. Accessed March 05, 2021.
http://dspace.library.uu.nl:8080/handle/1874/237700.
MLA Handbook (7th Edition):
Menage, K K. “High Ideals in the High North, Interdependence in a Territory Sui Generis.” 2012. Web. 05 Mar 2021.
Vancouver:
Menage KK. High Ideals in the High North, Interdependence in a Territory Sui Generis. [Internet] [Masters thesis]. Universiteit Utrecht; 2012. [cited 2021 Mar 05].
Available from: http://dspace.library.uu.nl:8080/handle/1874/237700.
Council of Science Editors:
Menage KK. High Ideals in the High North, Interdependence in a Territory Sui Generis. [Masters Thesis]. Universiteit Utrecht; 2012. Available from: http://dspace.library.uu.nl:8080/handle/1874/237700
University of Alberta
9.
Rawluk, Andrea J.
Intergenerational resilience in Aklavik, NT – exploring
conceptualizations, variables, and change across
generations.
Degree: MS, Department of Resource Economics and Environmental
Sociology, 2012, University of Alberta
URL: https://era.library.ualberta.ca/files/hd76s0057
► I explore resilience qualitatively and quantitatively with youth, adults, and elders in Aklavik, Northwest Territories, Canada. Using focus groups, semi-structured and follow-up interviews, the research…
(more)
▼ I explore resilience qualitatively and quantitatively
with youth, adults, and elders in Aklavik, Northwest Territories,
Canada. Using focus groups, semi-structured and follow-up
interviews, the research questions were: How is resilience defined
in Gwich’in and Inuvialuit cultures? What themes might be useful
for understanding the resilience of youth, adults and elders and,
examining these themes, what are the similarities and differences
between generations (as observed quantitatively)? What changes in
the community and on the land are important to different
generations? The results suggest that Gwich’in and Inuvialuit
elders define resilience similarly to other indigenous cultures
whilst offering additional perspectives. Fewer youth reported
having traditional language, knowledge and spirituality than
elders, but expressed a desire to learn them and described
spiritual experiences. All generations had similar perspectives
about what changes were negative and positive for the community and
the land and how they would like to see the future of the
community.
Subjects/Keywords: Resilience; Generations; Arctic
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APA (6th Edition):
Rawluk, A. J. (2012). Intergenerational resilience in Aklavik, NT – exploring
conceptualizations, variables, and change across
generations. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/hd76s0057
Chicago Manual of Style (16th Edition):
Rawluk, Andrea J. “Intergenerational resilience in Aklavik, NT – exploring
conceptualizations, variables, and change across
generations.” 2012. Masters Thesis, University of Alberta. Accessed March 05, 2021.
https://era.library.ualberta.ca/files/hd76s0057.
MLA Handbook (7th Edition):
Rawluk, Andrea J. “Intergenerational resilience in Aklavik, NT – exploring
conceptualizations, variables, and change across
generations.” 2012. Web. 05 Mar 2021.
Vancouver:
Rawluk AJ. Intergenerational resilience in Aklavik, NT – exploring
conceptualizations, variables, and change across
generations. [Internet] [Masters thesis]. University of Alberta; 2012. [cited 2021 Mar 05].
Available from: https://era.library.ualberta.ca/files/hd76s0057.
Council of Science Editors:
Rawluk AJ. Intergenerational resilience in Aklavik, NT – exploring
conceptualizations, variables, and change across
generations. [Masters Thesis]. University of Alberta; 2012. Available from: https://era.library.ualberta.ca/files/hd76s0057
Leiden University
10.
Mabrouk, S.
A Polar Balance? The power of states in the Arctic.
Degree: 2014, Leiden University
URL: http://hdl.handle.net/1887/32833
► In this thesis the ways in which power is shaped in the Arctic among the ‘Arctic five’ states are analyzed. It is argued that the…
(more)
▼ In this thesis the ways in which power is shaped in the
Arctic among the ‘
Arctic five’ states are analyzed. It is argued that the
Arctic is a multipolar region, in which Russia is the most dominant and other actors adopt strategies towards Russia such as soft balancing, bandwagoning, and appeasement. The thesis shows that traditional conceptions of power do not apply unequivocally to the
Arctic region, because it is hard to control effectively due to its unique geographical composition.
Power in the
Arctic is based on the recognition of sovereign rights over an area, which will give states economic opportunities (control over waterways and resources) in the future due to melting ice. The ideal of permanence underlying modern sovereignty is absent in the changing
Arctic, and sovereign rights for exploitation of an area do not give states actual sovereignty. Sovereignty disputes are therefore often unclear and create interesting power dynamics. They are resolved through institutional procedures based on international law and political geography, yet states have opportunities for negotiation and can adopt their own viewpoints on sovereignty based on what suits the national interest. Thus the
Arctic provides a unique example of ‘structural power’ and the interaction between structure and agency.
Due to the ever-changing nature of the
Arctic, states’ interests are more future-oriented than elsewhere. The thesis concludes that while security and sovereignty have become more important in the
Arctic in recent years, there is no ‘security dilemma’ because capacity building does not directly threaten other states, and military conflict does not lead to gains and is highly unlikely. Security issues are rather more specific and less concerned with warfare, and more with the environment and emergencies. The difficulty of operating in the
Arctic environment compels states to cooperate through international institutions, but the ‘
Arctic five’ do this to further their national interests. The interdependence of the
Arctic with the system-level is traced, and it is found that states are limited in their options in the
Arctic due to mutual commitments on a global scale and possible precedent effects of agreements in the
Arctic.
Advisors/Committee Members: Erk, Dr. J.G (advisor), Ragazzi, Dr. F.P.S.M (advisor).
Subjects/Keywords: Arctic; Diplomacy; Strategy
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APA (6th Edition):
Mabrouk, S. (2014). A Polar Balance? The power of states in the Arctic. (Masters Thesis). Leiden University. Retrieved from http://hdl.handle.net/1887/32833
Chicago Manual of Style (16th Edition):
Mabrouk, S. “A Polar Balance? The power of states in the Arctic.” 2014. Masters Thesis, Leiden University. Accessed March 05, 2021.
http://hdl.handle.net/1887/32833.
MLA Handbook (7th Edition):
Mabrouk, S. “A Polar Balance? The power of states in the Arctic.” 2014. Web. 05 Mar 2021.
Vancouver:
Mabrouk S. A Polar Balance? The power of states in the Arctic. [Internet] [Masters thesis]. Leiden University; 2014. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1887/32833.
Council of Science Editors:
Mabrouk S. A Polar Balance? The power of states in the Arctic. [Masters Thesis]. Leiden University; 2014. Available from: http://hdl.handle.net/1887/32833
Queens University
11.
Zahara, Alexander.
The Governance of Waste in Iqaluit, Nunavut
.
Degree: Environmental Studies, 2015, Queens University
URL: http://hdl.handle.net/1974/13587
► Through ethnographic fieldwork and archival research, this thesis examines the historical and contemporary governing practices that inform waste management in Iqaluit, Nunavut. I draw on…
(more)
▼ Through ethnographic fieldwork and archival research, this thesis examines the historical and contemporary governing practices that inform waste management in Iqaluit, Nunavut. I draw on governance theory to critically examine the diffuse network of power that influences waste management practices and outcomes, and that have contributed to the city’s waste issues. Like other communities in Canada’s Nunavut territory, Iqaluit lacks sophisticated technologies to manage waste and abandoned dump sites are littered throughout the city’s landscape. Across the territory, communities are concerned about their waste future.
This case study of waste governance is divided into three parts. In part one, waste is examined within the wider context of colonialism and contemporary neoliberal governance practices that have contributed to what scholars are referring to as the Anthropocene. It is argued that waste itself is part of a colonial context within which Inuit and other northerners continue to live. In part two, two of Iqaluit’s ‘trash animals’ – ravens and dogs – are examined to highlight the role of nonhumans in waste governance. It is argued that waste materially reconfigures relationships between human and nonhuman animals, and that these relationships are bequeathed to future generations. In part three, I examine the 2014 Iqaluit ‘dumpcano’ controversy, which coincided with my field season in Iqaluit. The dump fire brought to the fore a history of contaminant exposure and federal government underfunding that was differently framed and responded to by community members and government officials; while government risk management practices privileged neoliberal epistemologies and governance, active participation by Iqaluit residents placed community understandings of health, wellbeing, and sovereignty at the forefront of the ‘dumpcano’ debate. Within the context of myriad social and environmental issues, increased community growth and development, and Inuit efforts to self-determine, I suggest that improvements to Iqaluit’s waste management infrastructure should integrate supports to Inuit culture and knowledge systems. Doing so involves replacing a technical configuration of waste with one of knowing, being, and relating to others and the environment; and would help meet community goals and definitions for sustainable community development.
Subjects/Keywords: Arctic
;
Waste Management
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APA (6th Edition):
Zahara, A. (2015). The Governance of Waste in Iqaluit, Nunavut
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/13587
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Zahara, Alexander. “The Governance of Waste in Iqaluit, Nunavut
.” 2015. Thesis, Queens University. Accessed March 05, 2021.
http://hdl.handle.net/1974/13587.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Zahara, Alexander. “The Governance of Waste in Iqaluit, Nunavut
.” 2015. Web. 05 Mar 2021.
Vancouver:
Zahara A. The Governance of Waste in Iqaluit, Nunavut
. [Internet] [Thesis]. Queens University; 2015. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1974/13587.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Zahara A. The Governance of Waste in Iqaluit, Nunavut
. [Thesis]. Queens University; 2015. Available from: http://hdl.handle.net/1974/13587
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Oregon State University
12.
Alkire, Matthew Buckley.
Differentiating freshwater contributions and their variability to the surface and halocline layers of the Arctic and subarctic seas.
Degree: PhD, Oceanography, 2010, Oregon State University
URL: http://hdl.handle.net/1957/15188
► Dramatic and ongoing changes pervading the Arctic and subarctic seas over recent decades have motivated this effort to track and better understand hydrographic variability using…
(more)
▼ Dramatic and ongoing changes pervading the
Arctic and subarctic seas over
recent decades have motivated this effort to track and better understand hydrographic
variability using chemical tracers. Particular emphasis has been paid to differentiating
freshwater contributions to upper layers: namely Pacific water, meteoric water, and
sea-ice melt/formation.
Data collected in spring from stations occupied via aircraft in the central
Arctic indicate that Pacific origin water partly returned to the mixed and upper
halocline layers between 2003 and 2005. The Pacific influence became absent once
again from the Makarov Basin between 2006 and 2008. Pacific water appears to be
variably entrained into the Transpolar Drift Stream on timescales not clearly linked to
Arctic Oscillation indexed atmospheric forcing.
An in-situ ultraviolet spectrophotometer was used to profile nitrate
concentrations for the first time in the central
Arctic Ocean during 2007-2008 field
seasons. Sensor-based nitrate and dissolved oxygen were combined to calculate the
NO parameter (NO = 9xNO3 + O2), a quasi-conservative tracer that has been used to
define lower halocline water in the literature. The NO minima in the Makarov Basin
occurred above lower halocline water and were concomitant with larger Eurasian
river runoff fractions. These features suggest respiratory imprinting of East Siberian
Sea shelf waters prior to their offshore advection. Vertical, NO profiles in the
southern Canada Basin implicate multiple influences on the lower halocline,
including Eurasian Basin convective processes, diapycnal mixing near the shelf break
and ventilation via brine production associated with recurrent coastal polynyas.
Salinity-[delta]18O relationships in the Canadian Archipelago and Baffin Bay in late
summer in 1997 and 2003 show that a net sea-ice formation signal is inherited from
the
Arctic Ocean. Local, seasonal sea-ice melt contributions can be estimated by
taking this into account. Distributions of freshwater sources are similar to those
previously reported using other methods. However, differences in their relative
proportions are apparent and suggest variations over time.
Geochemical tracers augment understanding of variability in the formation
and circulation of both surface and halocline waters of the
Arctic Ocean via
quantitative separation of its freshwater components.
Advisors/Committee Members: Falkner, Kelly (advisor), Collier, Robert (committee member).
Subjects/Keywords: Arctic; Seawater – Composition
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APA ·
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Export
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Manager
APA (6th Edition):
Alkire, M. B. (2010). Differentiating freshwater contributions and their variability to the surface and halocline layers of the Arctic and subarctic seas. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/15188
Chicago Manual of Style (16th Edition):
Alkire, Matthew Buckley. “Differentiating freshwater contributions and their variability to the surface and halocline layers of the Arctic and subarctic seas.” 2010. Doctoral Dissertation, Oregon State University. Accessed March 05, 2021.
http://hdl.handle.net/1957/15188.
MLA Handbook (7th Edition):
Alkire, Matthew Buckley. “Differentiating freshwater contributions and their variability to the surface and halocline layers of the Arctic and subarctic seas.” 2010. Web. 05 Mar 2021.
Vancouver:
Alkire MB. Differentiating freshwater contributions and their variability to the surface and halocline layers of the Arctic and subarctic seas. [Internet] [Doctoral dissertation]. Oregon State University; 2010. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1957/15188.
Council of Science Editors:
Alkire MB. Differentiating freshwater contributions and their variability to the surface and halocline layers of the Arctic and subarctic seas. [Doctoral Dissertation]. Oregon State University; 2010. Available from: http://hdl.handle.net/1957/15188
University of Alaska – Fairbanks
13.
Dammann, Dyre O.
Role of Arctic Sea Ice Variability in Climate Models
.
Degree: 2011, University of Alaska – Fairbanks
URL: http://hdl.handle.net/11122/1879
► Arctic sea ice plays an important role in climate by influencing surface heat fluxes and albedo, so must be accurately represented in climate models. This…
(more)
▼ Arctic sea ice plays an important role in climate by influencing surface heat fluxes and albedo, so must be accurately represented in climate models. This study finds that the fully coupled ice-ocean-atmosphere-land Community Climate System Model (CCSM3.0) underestimates day-to-day ice variability compared to observations and employs the Community Atmosphere Model (CAM3.0) to investigate the atmospheric sensitivity to sea ice variability. Three 100-ensemble experiments are forced with climatological, daily-varying, and smoothly-varying sea ice conditions from an anomalously low ice period (September 2006-February 2007). Daily ice variability has a large local impact on the atmosphere when ice undergoes rapid changes, leading to local cooling and subsequent circulation changes. The most notable example of a large-scale atmospheric response occurs over Northern Europe during fall where daily ice variability forces reductions in the number and strength of cyclones, leading to positive sea level pressure anomalies, surface warming, and reduced cloud cover.
Advisors/Committee Members: Zhang, Xiang (committee).
Subjects/Keywords: arctic;
sea;
ice
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Manager
APA (6th Edition):
Dammann, D. O. (2011). Role of Arctic Sea Ice Variability in Climate Models
. (Thesis). University of Alaska – Fairbanks. Retrieved from http://hdl.handle.net/11122/1879
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Dammann, Dyre O. “Role of Arctic Sea Ice Variability in Climate Models
.” 2011. Thesis, University of Alaska – Fairbanks. Accessed March 05, 2021.
http://hdl.handle.net/11122/1879.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Dammann, Dyre O. “Role of Arctic Sea Ice Variability in Climate Models
.” 2011. Web. 05 Mar 2021.
Vancouver:
Dammann DO. Role of Arctic Sea Ice Variability in Climate Models
. [Internet] [Thesis]. University of Alaska – Fairbanks; 2011. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/11122/1879.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Dammann DO. Role of Arctic Sea Ice Variability in Climate Models
. [Thesis]. University of Alaska – Fairbanks; 2011. Available from: http://hdl.handle.net/11122/1879
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
14.
Neusitzer, Thomas David.
On the dielectric properties and normalized radar cross-section of crude oil-contaminated sea ice.
Degree: Electrical and Computer Engineering, 2017, University of Manitoba
URL: http://hdl.handle.net/1993/32423
► This thesis explores the effects of crude oil spilled beneath young sea ice on the dielectric properties and normalized radar cross-section of the ice at…
(more)
▼ This thesis explores the effects of crude oil spilled beneath young sea ice on the dielectric properties and normalized radar cross-section of the ice at microwave (C-band) frequencies. The dielectric profile, also referred to as the complex permittivity profile, of sea ice is a governing factor in how the ice scatters incident electromagnetic waves, thus affecting its associated normalized radar cross-section. The dielectric profile of sea ice is dependent on both the geophysical and thermal properties of the ice. Crude oil contained beneath, within, or on the surface of young sea ice was expected to change these properties, thus impacting both the dielectric profile and normalized radar cross-section of the ice. Differences between the dielectric profile and normalized radar cross-section of uncontaminated and oil-contaminated sea ice is expected to facilitate detection of oil-contaminated sea ice through active microwave remote sensing technologies. As such, a discussion of the geophysical, thermodynamic, and electromagnetic properties of sea ice is presented, as well as an overview of the behaviour of oil in ice infested environments and the efforts undertaken to detect crude oil-contaminated sea ice. Following this, the details of a preliminary laboratory experiment conducted to explore the differences in the dielectric profiles of uncontaminated and contaminated sea ice are presented. Next, a comprehensive description of the meso-scale crude oil-in-sea ice experiment and the results, including the modelled dielectric profiles and measured normalized radar cross-sections of uncontaminated and oil-contaminated sea ice, is provided. Finally, a simulation study comparing the normalized radar cross-section for the uncontaminated and oil-contaminated cases is presented. Based on the experimental and simulation work conducted, the observed differences in the temperature profiles and normalized radar cross-sections of uncontaminated and oil-contaminated sea ice suggest that differentiation between uncontaminated and oil-contaminated young sea ice using microwave remote sensing technologies may be possible.
Advisors/Committee Members: Mojabi, Puyan (Electrical and Computer Engineering), Isleifson, Dustin (Electrical and Computer Engineering).
Subjects/Keywords: Arctic remote sensing
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Export
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APA (6th Edition):
Neusitzer, T. D. (2017). On the dielectric properties and normalized radar cross-section of crude oil-contaminated sea ice. (Masters Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/32423
Chicago Manual of Style (16th Edition):
Neusitzer, Thomas David. “On the dielectric properties and normalized radar cross-section of crude oil-contaminated sea ice.” 2017. Masters Thesis, University of Manitoba. Accessed March 05, 2021.
http://hdl.handle.net/1993/32423.
MLA Handbook (7th Edition):
Neusitzer, Thomas David. “On the dielectric properties and normalized radar cross-section of crude oil-contaminated sea ice.” 2017. Web. 05 Mar 2021.
Vancouver:
Neusitzer TD. On the dielectric properties and normalized radar cross-section of crude oil-contaminated sea ice. [Internet] [Masters thesis]. University of Manitoba; 2017. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1993/32423.
Council of Science Editors:
Neusitzer TD. On the dielectric properties and normalized radar cross-section of crude oil-contaminated sea ice. [Masters Thesis]. University of Manitoba; 2017. Available from: http://hdl.handle.net/1993/32423
University of Manitoba
15.
Fargey, Shannon.
Characterization of orographic cloud and precipitation features over southern Baffin Island and surrounding area.
Degree: Environment and Geography, 2014, University of Manitoba
URL: http://hdl.handle.net/1993/23730
► Improved characterization of cloud and precipitation features are required to understand the impact of a changing climate in high latitude regions and accurately represent these…
(more)
▼ Improved characterization of cloud and precipitation features are required to understand the impact of a changing climate in high latitude regions and accurately represent these features in models. The importance of cold season precipitation to regional moisture cycling and our limited understanding of orographic cloud and precipitation processes in the
Arctic provide the motivation for this research. Using high-resolution datasets collected during the Storm Studies in the
Arctic (STAR) field project this thesis examines cloud and precipitation features over southern Baffin Island in Nunavut.
Cloud and precipitation features were shown to differ over orography compared to the adjacent ocean regions upstream. Gravity waves, terrain shape, atmospheric stability and atmosphere-ocean exchanges were all associated with precipitation enhancement. In addition, high sea ice extent, low-level blocking in the upstream environment and sublimation were factors that reduced precipitation. The nature of hydrometeors was variable and accretion and aggregation were found to be important determinants of whether precipitation reached the ground.
The processes controlling a snowfall event over southern Baffin Island were found to be complex, representing a significant challenge for modelling in the region. Low-level convection over adjacent ocean regions, strong upslope flow over the terrain, and the passing of a weak trough collectively produced the event. Analysis of the Global Environmental Multi-scale limited area model (GEM-LAM 2.5) revealed that upstream convection and upslope processes were affected by model errors. Consequently, precipitation onset was delayed and total modelled accumulation was 50% less than observations.
Further evaluation of a numerical weather prediction model during STAR cases provided descriptions of model errors and proficiencies for different synoptic forcing and surface environments. Overall the model overestimated temperature and had difficulties representing thermal inversions over sea ice. The model generally over-predicted moisture with the exception of profiles over sea ice and land. Wind speed was frequently underestimated, weakening upslope processes and errors in wind direction were large at times. Cloud-tops were usually too high and cloud-bases too low. Where multiple cloud layers were present, the dry layer depth was inaccurate. Model errors were shown to have implications for cloud and precipitation production and their forecast.
Advisors/Committee Members: Hanesiak, John (Environment and Geography) (supervisor), Stewart, Ronald (Environment and Geography) Stadnyk, Tricia (Civil Engineering) Dery, Stephen (Environmental Science and Engineering, University of Northern British Columbia) (examiningcommittee).
Subjects/Keywords: Arctic; cloud; precipitation
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APA (6th Edition):
Fargey, S. (2014). Characterization of orographic cloud and precipitation features over southern Baffin Island and surrounding area. (Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/23730
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Fargey, Shannon. “Characterization of orographic cloud and precipitation features over southern Baffin Island and surrounding area.” 2014. Thesis, University of Manitoba. Accessed March 05, 2021.
http://hdl.handle.net/1993/23730.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Fargey, Shannon. “Characterization of orographic cloud and precipitation features over southern Baffin Island and surrounding area.” 2014. Web. 05 Mar 2021.
Vancouver:
Fargey S. Characterization of orographic cloud and precipitation features over southern Baffin Island and surrounding area. [Internet] [Thesis]. University of Manitoba; 2014. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1993/23730.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Fargey S. Characterization of orographic cloud and precipitation features over southern Baffin Island and surrounding area. [Thesis]. University of Manitoba; 2014. Available from: http://hdl.handle.net/1993/23730
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Plymouth
16.
Brown, Thomas.
Production and preservation of the Arctic sea ice diatom biomarker IP25.
Degree: PhD, 2011, University of Plymouth
URL: http://hdl.handle.net/10026.1/314
► The presence of the sea ice biomarker IP25 in Arctic marine sediments has previously been used as a proxy measure of past sea ice conditions…
(more)
▼ The presence of the sea ice biomarker IP25 in Arctic marine sediments has previously been used as a proxy measure of past sea ice conditions in the Arctic. Although the sea ice diatom origin of IP25 was established previously, the nature of its production within sea ice, along with its transport through the water column to underlying sediments and its short-term preservation therein, had not been investigated in any significant detail. Variations in the concentration of the sea ice diatom biomarker IP25, were measured in sea ice collected from the eastern Beaufort Sea and Amundsen Gulf from January to June 2008. Temporal and vertical changes in IP25 concentrations were compared against other established indicators of sea ice algal production to determine, for the first time, that approximately 90% of the total sea ice IP25 accumulation occurred coincident with the ice algal bloom period. It was further established that IP25 biosynthesis was restricted, by sea ice porosity, to within the lower few centimetres of the sea ice and specifically to where brine volume fractions were >5%. Concentration differences of IP25 between sea ice and filtered seawater samples were also compared with those of established lipid indicators of algal production to estimate the dispersion of these lipids following seasonal sea ice melt. The largest concentration differences between sea ice and seawater samples were observed for IP25 and some other HBIs, consistent with a sea ice origin, while concentrations of fatty acids and sterols suggested contributions from both sea ice and phytoplankton. A novel analysis of a range of macrofaunal species revealed the presence of IP25 and other HBIs, with distributions somewhat resembling those observed in sea ice but more closely reflecting distributions of HBIs measured in sediments. As such, it is hypothesised that IP25 and HBI distributions in macrofaunal species reflect those of the sediments in which they live. The presence of IP25 and HBIs in macrofaunal species revealed, for the first time, a significant potential for biological cycling and storage of IP25 and other HBIs in the Arctic resulting from exposure during transport of the biomarker between sea ice and sediment. The observed presence of IP25 in 75% of the specimens investigated has presented important evidence for the potential of IP25 to act as a tracer of Arctic sea ice diet in the marine food web. Measurement of the downcore profiles of IP25 in shallow marine sediments alongside other biogeochemical parameters provided new evidence for the early diagenesis of this biomarker. Statistical correlations between some IP25 and Mn/Ti profiles (Station 405b; r = 0.89), that aid determination of the oxygen penetration depth, provided novel evidence for the partial degradation of IP25 (and other HBIs) in the upper sediment sections considered to be oxic. As such, it is suggested here, for the first time, that reactions under oxic conditions could be responsible for degradation of HBIs in some Arctic marine sediments, with the supply of…
Subjects/Keywords: 551.46; Arctic IP25
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APA ·
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Export
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Manager
APA (6th Edition):
Brown, T. (2011). Production and preservation of the Arctic sea ice diatom biomarker IP25. (Doctoral Dissertation). University of Plymouth. Retrieved from http://hdl.handle.net/10026.1/314
Chicago Manual of Style (16th Edition):
Brown, Thomas. “Production and preservation of the Arctic sea ice diatom biomarker IP25.” 2011. Doctoral Dissertation, University of Plymouth. Accessed March 05, 2021.
http://hdl.handle.net/10026.1/314.
MLA Handbook (7th Edition):
Brown, Thomas. “Production and preservation of the Arctic sea ice diatom biomarker IP25.” 2011. Web. 05 Mar 2021.
Vancouver:
Brown T. Production and preservation of the Arctic sea ice diatom biomarker IP25. [Internet] [Doctoral dissertation]. University of Plymouth; 2011. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10026.1/314.
Council of Science Editors:
Brown T. Production and preservation of the Arctic sea ice diatom biomarker IP25. [Doctoral Dissertation]. University of Plymouth; 2011. Available from: http://hdl.handle.net/10026.1/314
17.
Larsson, Sofia.
Att sälja norra Sverige som en arktisk destination.
Degree: Geography, 2019, Umeå University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-160993
► Today, more people have the opportunity to travel which means that more places need to raise awareness that they exist. In the global world…
(more)
▼ Today, more people have the opportunity to travel which means that more places need to raise awareness that they exist. In the global world that we live in today, competition among places are growing. This means that places need to work on their marketing to create a unique and special image that reaches out through all the noise. This study aims to investigate why a special image is chosen, in this case why the destination Swedish Lapland have chosen to market a region in north of Sweden as an artic destination. The study also aims to investigate what is included in the concept of an artic destination and what is comprehended in an artic lifestyle, which also is a theme that is used in the marketing of the region. Are there any challenges by using the artic and artic lifestyle concept in the marketing and what consequences can it entail? To answer these questions interviews where made with informants that have a professional work connection to the area. The result showed that the arctic region is complex phenomena to define also for those who use the expression in marketing. What is included in the artic concept and the lifestyle is connected to a lot of conceptions of the nature, culture, climate and experiences. The informants gave different viewpoints about challenges when marketing a large region and the consequences that can be registered. The hope with this study was to get a deeper understanding about the area and especially why a specific theme as the artic was used in marketing purpose for a region in north of Sweden.
Subjects/Keywords: Place marketing; Arctic definitions; Arctic tourism; Arctic experiences; Arctic lifestyle; Social Sciences; Samhällsvetenskap
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APA (6th Edition):
Larsson, S. (2019). Att sälja norra Sverige som en arktisk destination. (Thesis). Umeå University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-160993
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Larsson, Sofia. “Att sälja norra Sverige som en arktisk destination.” 2019. Thesis, Umeå University. Accessed March 05, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-160993.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Larsson, Sofia. “Att sälja norra Sverige som en arktisk destination.” 2019. Web. 05 Mar 2021.
Vancouver:
Larsson S. Att sälja norra Sverige som en arktisk destination. [Internet] [Thesis]. Umeå University; 2019. [cited 2021 Mar 05].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-160993.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Larsson S. Att sälja norra Sverige som en arktisk destination. [Thesis]. Umeå University; 2019. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-160993
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Montana Tech
18.
Miller, Nathaniel Ian.
Directions To My Place.
Degree: MFA, 2011, Montana Tech
URL: https://scholarworks.umt.edu/etd/323
This collection, composed mostly of non-fiction but also containing poetry and research-based historical fiction, concerns exploration: of country, self, minerals, form and the void.
Subjects/Keywords: Arctic; Pit; void
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APA (6th Edition):
Miller, N. I. (2011). Directions To My Place. (Thesis). Montana Tech. Retrieved from https://scholarworks.umt.edu/etd/323
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Miller, Nathaniel Ian. “Directions To My Place.” 2011. Thesis, Montana Tech. Accessed March 05, 2021.
https://scholarworks.umt.edu/etd/323.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Miller, Nathaniel Ian. “Directions To My Place.” 2011. Web. 05 Mar 2021.
Vancouver:
Miller NI. Directions To My Place. [Internet] [Thesis]. Montana Tech; 2011. [cited 2021 Mar 05].
Available from: https://scholarworks.umt.edu/etd/323.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Miller NI. Directions To My Place. [Thesis]. Montana Tech; 2011. Available from: https://scholarworks.umt.edu/etd/323
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Texas – Austin
19.
Compher, Eric Michael.
Long-term low-level Arctic aerosol trends, analysis, and climatological correlations at Alert, Canada.
Degree: PhD, Mechanical Engineering, 2019, University of Texas – Austin
URL: http://dx.doi.org/10.26153/tsw/5760
► Three decades of weekly winter low-level Arctic aerosol samples from Alert, Canada, are analyzed using Neutron Activation Analysis (NAA) in the TRIGA reactor at the…
(more)
▼ Three decades of weekly winter low-level
Arctic aerosol samples from Alert, Canada, are analyzed using Neutron Activation Analysis (NAA) in the TRIGA reactor at the University of Texas. The samples are from the longest currently-running
Arctic aerosol data collection project and have received only limited analysis to date. The elemental composition (Aluminum, Bromine, Calcium, Chlorine, Copper, Iodine, Magnesium, Manganese, Sodium, Titanium, and Vanadium) is determined for each sample. The elemental results are characterized statistically and the results are compared to climatological data including temperature data, sea ice data, ice shelf data, and snow cover data. Positive Matrix Factorization (PMF) is performed on the complete data set to determine primary sources of the aerosol pollution. Other data from Alert, including Methanesulphonic Acid (MSA), Iron, and Sulphate data, is compared to the NAA results, and additional PMF is performed with the additional data. Results show many expected as well as unexpected trends and correlations including correlations with ice cover and temperature trends, correlations to decreasing anthropogenic pollution, and long-term trends of sea components and sea-component ratios in the aerosol. PMF results conclude that there are 5 predominant sources of the
Arctic aerosol including two sea sources, two predominant anthropogenic sources (combustion and industrial), and a crustal component. This particular area of inquiry represents completely new information in the growing body of climate science and may influence studies that relate to the
Arctic climate and environment, and should have an impact on the particular fields of
Arctic Aerosol Monitoring, Atmospheric Transport, Global Diffusion and Dispersion,
Arctic Climate Science, and Pollution Monitoring.
Advisors/Committee Members: Biegalski, Steven R. (advisor), Sheldon, Landsberger (advisor).
Subjects/Keywords: Arctic aerosol trends
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APA (6th Edition):
Compher, E. M. (2019). Long-term low-level Arctic aerosol trends, analysis, and climatological correlations at Alert, Canada. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://dx.doi.org/10.26153/tsw/5760
Chicago Manual of Style (16th Edition):
Compher, Eric Michael. “Long-term low-level Arctic aerosol trends, analysis, and climatological correlations at Alert, Canada.” 2019. Doctoral Dissertation, University of Texas – Austin. Accessed March 05, 2021.
http://dx.doi.org/10.26153/tsw/5760.
MLA Handbook (7th Edition):
Compher, Eric Michael. “Long-term low-level Arctic aerosol trends, analysis, and climatological correlations at Alert, Canada.” 2019. Web. 05 Mar 2021.
Vancouver:
Compher EM. Long-term low-level Arctic aerosol trends, analysis, and climatological correlations at Alert, Canada. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2019. [cited 2021 Mar 05].
Available from: http://dx.doi.org/10.26153/tsw/5760.
Council of Science Editors:
Compher EM. Long-term low-level Arctic aerosol trends, analysis, and climatological correlations at Alert, Canada. [Doctoral Dissertation]. University of Texas – Austin; 2019. Available from: http://dx.doi.org/10.26153/tsw/5760
University of Delaware
20.
Chan, Weihan.
The Arctic energy budget, sea ice area, and the atmospheric circulation.
Degree: PhD, University of Delaware, Department of Geography, 2014, University of Delaware
URL: http://udspace.udel.edu/handle/19716/16801
► Arctic amplification and changes in Arctic sea ice has led to questions regarding the role of the Arctic in mid-latitude climate. All studies concerning the…
(more)
▼ Arctic amplification and changes in
Arctic sea ice has led to questions regarding the role of the
Arctic in mid-latitude climate. All studies concerning the factors and the impacts suggest that changes in the
Arctic system occur in association with altered energy fluxes. Therefore, this study explores
Arctic energy fluxes in detail concentrating on their temporal and regional characteristics using the Climate Forecast System Reanalysis (CFSR) dataset. To understand how energy flux variations affect the
Arctic climate, interactions among energy flux variables,
Arctic sea ice, and prominent atmospheric teleconnections are investigated. These interactions are analyzed from two spatial perspectives: the entire
Arctic and the sub-
Arctic regions. Results from the entire
Arctic showed that the annual cycle and the spatial distribution of energy fluxes follow the seasonal cycle, latitudinal variation, and surface conditions. No significant long-term trends are found for the energy flux variables; however, the accumulated total energy tendency suggests a prolonged period with energy flux surplus from 1995-2006. Significant correlations were found among energy fluxes, sea ice, and the NAO suggesting that sea ice variations are connected with changes in atmospheric circulation through the surface energy flux (F sfc ) directly or indirectly through the atmospheric energy transport (TEDIV). Maps of the spatial correlations show stronger relationships between these variables in unique regions. Hence, studying these energy fluxes and the relationship from a regional perspective is essential. Examination of coherent regions shows that the annual cycle and the time series of the
Arctic sub-regions are similar to the average for the entire
Arctic following the solar cycle and without long-term linear trends. Only the annual cycle for TEDIV show differences among regions and do not resemble the average
Arctic pattern. Additionally, a hypothetical pathway with two time-scales of variation is suggested. These two levels of influence complement each other and provide a comprehensive picture of the interactions among
Arctic energy fluxes, sea ice, and atmospheric circulation. Further, the analysis suggests that sea ice variation is an important factor in modulating
Arctic energy fluxes, and the Kara region plays a critical role in linking sea ice variability and atmospheric circulation.
Advisors/Committee Members: Leathers, Daniel J..
Subjects/Keywords: Energy budget (Geophysics) – Arctic regions.; Sea ice – Arctic regions.; Atmospheric circulation – Arctic regions.
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APA (6th Edition):
Chan, W. (2014). The Arctic energy budget, sea ice area, and the atmospheric circulation. (Doctoral Dissertation). University of Delaware. Retrieved from http://udspace.udel.edu/handle/19716/16801
Chicago Manual of Style (16th Edition):
Chan, Weihan. “The Arctic energy budget, sea ice area, and the atmospheric circulation.” 2014. Doctoral Dissertation, University of Delaware. Accessed March 05, 2021.
http://udspace.udel.edu/handle/19716/16801.
MLA Handbook (7th Edition):
Chan, Weihan. “The Arctic energy budget, sea ice area, and the atmospheric circulation.” 2014. Web. 05 Mar 2021.
Vancouver:
Chan W. The Arctic energy budget, sea ice area, and the atmospheric circulation. [Internet] [Doctoral dissertation]. University of Delaware; 2014. [cited 2021 Mar 05].
Available from: http://udspace.udel.edu/handle/19716/16801.
Council of Science Editors:
Chan W. The Arctic energy budget, sea ice area, and the atmospheric circulation. [Doctoral Dissertation]. University of Delaware; 2014. Available from: http://udspace.udel.edu/handle/19716/16801
Australian National University
21.
Buchanan, Elizabeth.
Russian Arctic strategy under Putin: conflict or cooperation?
.
Degree: 2017, Australian National University
URL: http://hdl.handle.net/1885/143251
► The Arctic is widely considered to be a potential flashpoint for international conflict over access to, and control of, its riches. Russia's assertive foreign and…
(more)
▼ The Arctic is widely considered to be a potential
flashpoint for international conflict over access to, and control
of, its riches. Russia's assertive foreign and military policies
in recent years have accentuated this perception. This study of
Russian Arctic strategy under Putin proceeds from the notion that
Putin’s Russia seeks to regain great power status on the back
of its energy wealth, and argues that it will continue to apply
energy in a coercive nature within the former Soviet Union and
the near abroad. However, when it comes to the Arctic, Russia has
no alternative but to approach the region and its counterparts in
a measured and cooperative manner. The hypothesis of this study
is that there is a strong case for Russian cooperation with the
West in the Arctic. The thesis argues this cooperation results
from Russia’s technological and investment requirements from
the West; Russia’s solid legal case in the Arctic with regards
to the continental shelf debate; and finally, the strong
precedent of cooperation over Arctic matters. These themes are
explored through a neoclassical realist framework. For now,
Russia may continue to try to repair relations with the West,
where possible, including the Arctic and many Western leaders and
corporations will want to respond positively. Even if tensions
persist in Russia's near abroad, including the Baltic region, the
'new cold War' paradigm will not apply to Arctic resources and
governance issues.
Subjects/Keywords: Russian Arctic;
Arctic;
Putin;
Arctic geopolitics;
polar security;
energy security;
Russian foreign policy
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APA (6th Edition):
Buchanan, E. (2017). Russian Arctic strategy under Putin: conflict or cooperation?
. (Thesis). Australian National University. Retrieved from http://hdl.handle.net/1885/143251
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Buchanan, Elizabeth. “Russian Arctic strategy under Putin: conflict or cooperation?
.” 2017. Thesis, Australian National University. Accessed March 05, 2021.
http://hdl.handle.net/1885/143251.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Buchanan, Elizabeth. “Russian Arctic strategy under Putin: conflict or cooperation?
.” 2017. Web. 05 Mar 2021.
Vancouver:
Buchanan E. Russian Arctic strategy under Putin: conflict or cooperation?
. [Internet] [Thesis]. Australian National University; 2017. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1885/143251.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Buchanan E. Russian Arctic strategy under Putin: conflict or cooperation?
. [Thesis]. Australian National University; 2017. Available from: http://hdl.handle.net/1885/143251
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Oregon State University
22.
Ourada, Quin.
Using reanalysis data to characterize Arctic and Sub-Arctic glaciers.
Degree: MS, Geography, 2009, Oregon State University
URL: http://hdl.handle.net/1957/11391
► The net mass balance fluctuations of Arctic and Sub-Arctic glaciers, north of 47.5° North latitude, are described over a 45-year period from 1957 to 2002…
(more)
▼ The net mass balance fluctuations of
Arctic and Sub-
Arctic glaciers, north of 47.5°
North latitude, are described over a 45-year period from 1957 to 2002 using two
parameters derived from a gridded climatology reanalysis. Variability among 185
measured glaciers was represented according to two main components. The first
component represents the temporal variability of the net balance series derived from a
statistically defined geographic region. The second component represents the glacier-specific
variability in the net balance series (the amplitude of variability). Each
component was numerically derived using gridded monthly mean temperature and
precipitation data at a 2.5° spatial resolution. These two main components of the net
balance series can be determined from simple glacier location data. The temporal
variability component was determined using patterns of warm season temperature that
were then used to define the statistically correlated regions. The glacier-specific
component was approximated along continuum of continentality. Continentality was
based on the relative ratio of warm to cool season temperature at the glacier location,
which was then normalized and differenced using precipitation magnitude.
Ultimately 21 distinct geographic regions containing at least one representative glacier
were defined for the first, temporal component. In data-rich regions, such as the Alps
and Scandinavia, spatial variability was identified on a finer scale than individual
mountain ranges. The temporal evolution of measured net balance series within each
region were more closely related to each other than measured mass balance on the
scale of mountain ranges. This temporal signal can be considered the most likely
temporal signal that would be characteristic of unmeasured glaciers within the spatial
extent of the region. This spatial extent defined for each region is specific, and based
on similarities in physical climatology as opposed to more vaguely defined regions
based on mountain ranges or other geographic features. The, second, glacier specific
component of the series was related to net balance standard deviations (58% variance
explained), balance amplitude (55% variance explained) and climate sensitivity (56%
variance of temperature sensitivity and 52% variance of precipitation sensitivity
explained) for measured glaciers. The normalization process resulted in a glacier
continuum ranging from -1 to 1 to describe the relative position of a glacier along a
continuum or wet-maritime to dry continental.
These two pieces of information can be used together to approximate a large
component of the net balance series for an unmeasured glacier based on location
alone. Representing unmeasured glaciers in this manner is, by no means, a substitute
for actual field measurements or complex and highly parameterized mass balance
models. This approach is also limited in accuracy by the spatial resolution of the
gridded climatologies used, which at this time are still quite coarse, 2.5°. However,…
Advisors/Committee Members: Nolin, Anne W. (advisor), Clark, Peter U. (committee member).
Subjects/Keywords: Glacier; Glaciers – Arctic regions
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APA (6th Edition):
Ourada, Q. (2009). Using reanalysis data to characterize Arctic and Sub-Arctic glaciers. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/11391
Chicago Manual of Style (16th Edition):
Ourada, Quin. “Using reanalysis data to characterize Arctic and Sub-Arctic glaciers.” 2009. Masters Thesis, Oregon State University. Accessed March 05, 2021.
http://hdl.handle.net/1957/11391.
MLA Handbook (7th Edition):
Ourada, Quin. “Using reanalysis data to characterize Arctic and Sub-Arctic glaciers.” 2009. Web. 05 Mar 2021.
Vancouver:
Ourada Q. Using reanalysis data to characterize Arctic and Sub-Arctic glaciers. [Internet] [Masters thesis]. Oregon State University; 2009. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1957/11391.
Council of Science Editors:
Ourada Q. Using reanalysis data to characterize Arctic and Sub-Arctic glaciers. [Masters Thesis]. Oregon State University; 2009. Available from: http://hdl.handle.net/1957/11391
Dalhousie University
23.
Perro, Christopher.
CLOUD AND AEROSOL PROPERTIES MEASURED WITH A LIDAR IN THE
HIGH ARCTIC AT EUREKA.
Degree: MS, Department of Physics & Atmospheric
Science, 2010, Dalhousie University
URL: http://hdl.handle.net/10222/13131
► The recently commissioned CANDAC Rayleigh?Mie?Raman Lidar (CRL) in Eureka, Nunavut, finished its first winter measurement campaign in 2010, during which over 900 hours of data…
(more)
▼ The recently commissioned CANDAC Rayleigh?Mie?Raman
Lidar (CRL) in Eureka, Nunavut, finished its first winter
measurement campaign in 2010, during which over 900 hours of data
was collected. A comparison of several inversion techniques are
shown to de- termine which one is most appropriate for the CRL
aerosol and cloud analyses. Results of a newly implemented
automatic beam steering program are shown and discussed. Measure-
ments of water vapour and aerosols showed a distinct layering
effect in the troposphere. Back trajectories of these layers are
compared to the CRL measurements to determine origins of these
layers. Measurements of significant aerosol concentrations in the
lower stratosphere were seen during the campaign, which were from
the Sarychev eruption in June of 2009. The aerosol evolution over
Eureka is shown by using different ground-based and satellite-based
instruments. Calculations using multi-wavelength aerosol and cloud
measurements are used to give insight on aerosol and cloud particle
properties.
Advisors/Committee Members: NA (external-examiner), Dr. Ted Monchesky (graduate-coordinator), Dr. Glen Lesins (thesis-reader), Dr. Jeffrey Pierce (thesis-reader), Dr. Thomas Duck (thesis-supervisor), Not Applicable (ethics-approval), Not Applicable (manuscripts), Not Applicable (copyright-release).
Subjects/Keywords: Lidar; Atmosphere; Arctic; Radiation; Winter
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APA (6th Edition):
Perro, C. (2010). CLOUD AND AEROSOL PROPERTIES MEASURED WITH A LIDAR IN THE
HIGH ARCTIC AT EUREKA. (Masters Thesis). Dalhousie University. Retrieved from http://hdl.handle.net/10222/13131
Chicago Manual of Style (16th Edition):
Perro, Christopher. “CLOUD AND AEROSOL PROPERTIES MEASURED WITH A LIDAR IN THE
HIGH ARCTIC AT EUREKA.” 2010. Masters Thesis, Dalhousie University. Accessed March 05, 2021.
http://hdl.handle.net/10222/13131.
MLA Handbook (7th Edition):
Perro, Christopher. “CLOUD AND AEROSOL PROPERTIES MEASURED WITH A LIDAR IN THE
HIGH ARCTIC AT EUREKA.” 2010. Web. 05 Mar 2021.
Vancouver:
Perro C. CLOUD AND AEROSOL PROPERTIES MEASURED WITH A LIDAR IN THE
HIGH ARCTIC AT EUREKA. [Internet] [Masters thesis]. Dalhousie University; 2010. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10222/13131.
Council of Science Editors:
Perro C. CLOUD AND AEROSOL PROPERTIES MEASURED WITH A LIDAR IN THE
HIGH ARCTIC AT EUREKA. [Masters Thesis]. Dalhousie University; 2010. Available from: http://hdl.handle.net/10222/13131
Ryerson University
24.
Luce, Sarah.
Spatial and temporal patterns of biophysical variables and their influence on CO2 flux in a high arctic wetland.
Degree: 2016, Ryerson University
URL: https://digital.library.ryerson.ca/islandora/object/RULA%3A5645
► Arctic wetlands have been globally important carbon reservoirs throughout the past but climate change is threatening to shift their status to carbon sources. Increasing Arctic…
(more)
▼ Arctic wetlands have been globally important carbon reservoirs throughout the past but climate change is threatening to shift their status to carbon sources. Increasing Arctic temperatures are depleting perennial snowpacks these wetlands depend upon as their hydrological inputs which is altering their environmental conditions and carbon cycles. The objective of this study is to investigate how the physical conditions of Arctic wetlands will be altered by climate change and what influence these changes will have on CO2 exchange. High spatial and temporal resolution biophysical data from a high Arctic wetland, collected over the growing season of 2015, was used for this analysis. The results from this study indicate that the wetland is at risk of thawing and drying out under a warmer climate regime. CO2 emissions were found to increase most significantly with increased air temperatures, while CO2 uptake increased with increases in solar radiation and soil moisture. Combined, these results suggest that CO2 production in the soil will increase while CO2 uptake will decrease in Arctic wetlands as climate change continues.
Subjects/Keywords: Wetlands – Environmental aspects – Arctic regions; Climatic changes – Arctic regions; Greenhouse gases – Arctic regions; Wetland hydrology – Arctic regions
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to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Luce, S. (2016). Spatial and temporal patterns of biophysical variables and their influence on CO2 flux in a high arctic wetland. (Thesis). Ryerson University. Retrieved from https://digital.library.ryerson.ca/islandora/object/RULA%3A5645
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Luce, Sarah. “Spatial and temporal patterns of biophysical variables and their influence on CO2 flux in a high arctic wetland.” 2016. Thesis, Ryerson University. Accessed March 05, 2021.
https://digital.library.ryerson.ca/islandora/object/RULA%3A5645.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Luce, Sarah. “Spatial and temporal patterns of biophysical variables and their influence on CO2 flux in a high arctic wetland.” 2016. Web. 05 Mar 2021.
Vancouver:
Luce S. Spatial and temporal patterns of biophysical variables and their influence on CO2 flux in a high arctic wetland. [Internet] [Thesis]. Ryerson University; 2016. [cited 2021 Mar 05].
Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A5645.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Luce S. Spatial and temporal patterns of biophysical variables and their influence on CO2 flux in a high arctic wetland. [Thesis]. Ryerson University; 2016. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A5645
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Alberta
25.
Duncan, Angus.
Spatial and temporal variations of the surface energy
balance and ablation on the Belcher Glacier, Devon Island, Nunavut,
Canada.
Degree: MS, Department of Earth and Atmospheric
Sciences, 2011, University of Alberta
URL: https://era.library.ualberta.ca/files/vd66w0378
► In the summer of 2008 (June 2nd – September 19th) detailed measurements of meteorological conditions and glacier surface properties were conducted in the Belcher Glacier…
(more)
▼ In the summer of 2008 (June 2nd – September 19th)
detailed measurements of meteorological conditions and glacier
surface properties were conducted in the Belcher Glacier catchment
(718 km2), Devon Island Ice Cap, Nunavut, Canada. These
measurements were used to force and validate a distributed surface
energy balance and sub-surface snow model capable of calculating
surface ablation rates and meltwater runoff. This study represents
a contribution to the International Polar Year (IPY) Glaciodyn
project, whose overall aim is to examine the role of hydrology and
ice dynamics in the response of marine-terminating glaciers in the
Arctic to climate change. Spatially-averaged total water equivalent
(w.e.) ablation was 677 mm w.e., and total predicted runoff during
the 2008 summer was 3.9 x 108 m3. Net radiation (87%) was the main
source of energy over the study period, followed by the sensible
heat flux (13%). Net longwave radiation and the latent heat flux
represented an overall energy loss from the surface. Modelled melt
season duration lasted from June 17th – August 15th, and the
majority of ablation occurred in two main periods, from June 26th –
July 18th, and from July 27th to August 14th. Snowfall and lower
air temperatures limited ablation between these dates and after
August 15th. Ice exposure at elevations below 1000 m occurred by
July 1st. Periods of high ablation rates were associated with
positive air temperatures and high net shortwave radiation
receipts, and with near surface air temperature gradients that were
shallow or inverted (i.e. higher air temperatures at higher
elevations). Periods of minimum ablation rates occurred when net
shortwave radiation receipts were reduced (e.g. following summer
snowfall) and when air temperatures were negative. The largest
changes in both the net surface energy balance and ablation rates
were linked to changes in surface albedo associated with (i)
snowpack removal and ice exposure, and (ii) summer snowfall events.
Modelled time series of runoff from individual sub-catchments
within the Belcher catchment will be used to force a coupled
hydrology and ice flow dynamics model of the Belcher Glacier that
will be used to investigate the dynamic response of
tidewater-terminating glaciers to surface hydrological
forcing.
Subjects/Keywords: Arctic; Surface energy balance; Glacier
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APA (6th Edition):
Duncan, A. (2011). Spatial and temporal variations of the surface energy
balance and ablation on the Belcher Glacier, Devon Island, Nunavut,
Canada. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/vd66w0378
Chicago Manual of Style (16th Edition):
Duncan, Angus. “Spatial and temporal variations of the surface energy
balance and ablation on the Belcher Glacier, Devon Island, Nunavut,
Canada.” 2011. Masters Thesis, University of Alberta. Accessed March 05, 2021.
https://era.library.ualberta.ca/files/vd66w0378.
MLA Handbook (7th Edition):
Duncan, Angus. “Spatial and temporal variations of the surface energy
balance and ablation on the Belcher Glacier, Devon Island, Nunavut,
Canada.” 2011. Web. 05 Mar 2021.
Vancouver:
Duncan A. Spatial and temporal variations of the surface energy
balance and ablation on the Belcher Glacier, Devon Island, Nunavut,
Canada. [Internet] [Masters thesis]. University of Alberta; 2011. [cited 2021 Mar 05].
Available from: https://era.library.ualberta.ca/files/vd66w0378.
Council of Science Editors:
Duncan A. Spatial and temporal variations of the surface energy
balance and ablation on the Belcher Glacier, Devon Island, Nunavut,
Canada. [Masters Thesis]. University of Alberta; 2011. Available from: https://era.library.ualberta.ca/files/vd66w0378
Texas A&M University
26.
Canedo Oropeza, Maria Fernanda.
Investigating the Chemical Composition and Bioavailability of Arctic River Dissolved Organic Matter (DOM) Using Biomarkers.
Degree: MS, Oceanography, 2016, Texas A&M University
URL: http://hdl.handle.net/1969.1/158616
► Arctic rivers are the dominant pathways for the transport of terrestrial dissolved organic matter (DOM) to the Arctic Ocean, but knowledge of lability, sources, and…
(more)
▼ Arctic rivers are the dominant pathways for the transport of terrestrial dissolved organic matter (DOM) to the
Arctic Ocean, but knowledge of lability, sources, and transformations of organic carbon and nitrogen in
Arctic river watersheds is extremely limited. This study uses chemical analyses of enantiomeric amino acids and carbohydrates as biomarkers to investigate the chemical composition and bioavailability of DOM in five major
Arctic watersheds. Carbohydrate-based indicators are sensitive to polysaccharide components derived from all plant sources; hydroxyproline and D-amino acids serve as indicators of plant and bacterial nitrogen, respectively. The results show the bioavailability of DOM in
Arctic rivers is strongly correlated with seasonal discharge, vegetation topography, and water residence time. Pulses of bioavailable DOM were observed in the Siberian Rivers during the spring freshet, whereas the Mackenzie River exhibited extensively degraded DOM throughout all stages of the hydrograph. Freshet samples showed elevated input of plant-derived dissolved organic nitrogen. Bacterial organic matter comprised a significant fraction of riverine DOM (20-40%). These results demonstrate the importance of bacteria in regulating DOM composition and reactivity in
Arctic rivers.
Advisors/Committee Members: Kaiser, Karl (advisor), Amon, Rainer (committee member), Santschi, Peter (committee member).
Subjects/Keywords: Arctic rivers; DOM; biomarkers
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APA (6th Edition):
Canedo Oropeza, M. F. (2016). Investigating the Chemical Composition and Bioavailability of Arctic River Dissolved Organic Matter (DOM) Using Biomarkers. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/158616
Chicago Manual of Style (16th Edition):
Canedo Oropeza, Maria Fernanda. “Investigating the Chemical Composition and Bioavailability of Arctic River Dissolved Organic Matter (DOM) Using Biomarkers.” 2016. Masters Thesis, Texas A&M University. Accessed March 05, 2021.
http://hdl.handle.net/1969.1/158616.
MLA Handbook (7th Edition):
Canedo Oropeza, Maria Fernanda. “Investigating the Chemical Composition and Bioavailability of Arctic River Dissolved Organic Matter (DOM) Using Biomarkers.” 2016. Web. 05 Mar 2021.
Vancouver:
Canedo Oropeza MF. Investigating the Chemical Composition and Bioavailability of Arctic River Dissolved Organic Matter (DOM) Using Biomarkers. [Internet] [Masters thesis]. Texas A&M University; 2016. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1969.1/158616.
Council of Science Editors:
Canedo Oropeza MF. Investigating the Chemical Composition and Bioavailability of Arctic River Dissolved Organic Matter (DOM) Using Biomarkers. [Masters Thesis]. Texas A&M University; 2016. Available from: http://hdl.handle.net/1969.1/158616
University of Waterloo
27.
Burke, Samantha.
An integrative study on the controls of mercury (Hg) in the sediments and food webs of thermokarst lakes on the Arctic Coastal Plain of Alaska.
Degree: 2019, University of Waterloo
URL: http://hdl.handle.net/10012/14823
► Arctic freshwater ecosystems are subject to profound climate-driven changes. Air temperatures are rising, leading to changes that include increased primary production and enhanced permafrost degradation.…
(more)
▼ Arctic freshwater ecosystems are subject to profound climate-driven changes. Air temperatures are rising, leading to changes that include increased primary production and enhanced permafrost degradation. These and other climate-related effects interact to influence the accumulation of mercury in sediments and food webs of Arctic lakes. Mercury is a neurotoxin that is harmful to human and animal health, and in its methylated form, mercury can be taken up and biomagnified through food webs. The controls on mercury deposition, bioaccumulation, and biomagnification are complex and spatially variable. An area where especially little is known about spatial and temporal variability in mercury accumulation is in the food webs and sediments of lakes on the Arctic Coastal Plain of Alaska (ACP), a lake-rich region in northern Alaska.
Sediment cores were collected from three thermokarst lakes on the ACP and analyzed to understand changes in, and drivers of, Hg accumulation over the past ~100 years (Chapter 2). Mercury accumulation in two of the three lakes was variable and high over the past century (mean=37.4 µg/m2/year and mean = 45.8 µg/m2/year), and largely controlled by sedimentation rate. Mercury accumulation in the third lake was lower (mean = 6.5 µg/m2/year), more temporally uniform, and was more strongly related to sediment Hg concentration than sedimentation rate. Sediment mercury concentrations were quantitatively related to measures of sediment composition and VRS-inferred chlorophyll-a, and sedimentation rates were related to various catchment characteristics. These results were compared to data from 37 previously studied Arctic and Alaskan lakes. Results from the meta-analysis indicate that lake thermokarst lakes have significantly higher and more variable Hg accumulation rates than non-thermokarst lakes, suggesting that properties of thermokarst lakes, such as thermal erosion, thaw slumping, and low hydraulic conductivity likely make these lakes prone to high and variable Hg accumulation rates.
Following the observation that catchment influence varied spatially on the ACP, and that it affected the amount of, and pathways by which, mercury accumulated in lake sediments (Chapter 2), I hypothesized that catchment influence may also affect how mercury enters and accumulates in lake food webs on the ACP. In Chapter 3, six lakes were sampled across a physico-chemical gradient on the ACP to investigate variability in methylmercury levels ([MeHg]) in Ninespine stickleback (Pungitius pungitius), a fish species that was present in all lakes. Evidence suggested that bioaccumulation of MeHg through lake food webs was indirectly affected by degree of catchment influence. Methyl mercury concentrations in sediments and filter feeding invertebrates were higher in lakes that were inferred to be more autochthonous (less catchment influence), but higher in periphyton from lakes that were inferred to be more allochthonous (more catchment influence). Regardless of catchment influence, benthic invertebrates had higher…
Subjects/Keywords: Mercury; Arctic; permafrost; bioaccumulation
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APA (6th Edition):
Burke, S. (2019). An integrative study on the controls of mercury (Hg) in the sediments and food webs of thermokarst lakes on the Arctic Coastal Plain of Alaska. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/14823
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Burke, Samantha. “An integrative study on the controls of mercury (Hg) in the sediments and food webs of thermokarst lakes on the Arctic Coastal Plain of Alaska.” 2019. Thesis, University of Waterloo. Accessed March 05, 2021.
http://hdl.handle.net/10012/14823.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Burke, Samantha. “An integrative study on the controls of mercury (Hg) in the sediments and food webs of thermokarst lakes on the Arctic Coastal Plain of Alaska.” 2019. Web. 05 Mar 2021.
Vancouver:
Burke S. An integrative study on the controls of mercury (Hg) in the sediments and food webs of thermokarst lakes on the Arctic Coastal Plain of Alaska. [Internet] [Thesis]. University of Waterloo; 2019. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/10012/14823.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Burke S. An integrative study on the controls of mercury (Hg) in the sediments and food webs of thermokarst lakes on the Arctic Coastal Plain of Alaska. [Thesis]. University of Waterloo; 2019. Available from: http://hdl.handle.net/10012/14823
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Penn State University
28.
Wieczorek, Rebecca A.
Weathering responses to rapid climate change: analysis of a high resolution osmium isotope record at the Paleocene-Eocene Thermal Maximum.
Degree: 2012, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/14084
► The Paleocene-Eocene Thermal Maximum (PETM, ~55.8 million years ago; Ma) was an abrupt ~170 thousand year (ky) global warming event in which a large amount…
(more)
▼ The Paleocene-Eocene Thermal Maximum (PETM, ~55.8 million years ago; Ma) was an abrupt ~170 thousand year (ky) global warming event in which a large amount of carbon was added to the atmosphere-ocean system over a few thousand years. According to our current understanding, such perturbations of the carbon cycle are regulated over geologic timescales by weathering processes, as atmospheric carbon is removed through the process of silicate weathering. Evidence of past weathering (“paleoweathering”) is determined through the use of isotope proxies; the marine osmium isotope record is one proxy commonly utilized for its ability to record geologically rapid events due to osmium’s short (10 ky) residence time in the ocean.
Here I present an osmium isotope record (187Os/188Os) from Spitsbergen, Svalbard (core BH 9/05) spanning the PETM interval. The core is a marine grey-shale sequence with the PETM-defining carbon isotope excursion spanning ~50 m, making it ideal for high-resolution analysis. For this study, forty-four bulk rock samples were digested using Carius tube procedures and/or NiS fire assay bulk fusions and their rhenium (Re) and Os concentrations and Os isotopic compositions measured using inductively-coupled plasma mass spectrometry (ICP-MS).
Bulk rock Os concentrations range from 111 to 207 pg/g while Re concentrations range from 0.7 to 13.1 ppb. Both Re and Os concentrations increase over the PETM interval, coincident with an interval of laminated shales and elevated pyrite content, suggesting regional euxinic conditions. 187Os/188Os ratios range from 0.3557 to 0.8238, with a definitive maximum ~6 ky after the onset of the carbon isotope excursion (CIE), concurrent with a large increase in the proportion of kaolinite. These increases in 187Os/188Os ratios and kaolinite content are interpreted as an increase in continental weathering through increased riverine Os input rather than lithologic source change. Modeling also supports this conclusion, though influence from a source change cannot be absolutely ruled out.
Bulk elemental oxide concentrations were also measured in shales spanning the PETM in order to provide additional constraints on both timing of events and potential weathering sources. Bulk oxides are used to calculate the chemical index of alteration (CIA), a common weathering intensity index. CIA measurements indicate source material deposited during the onset of the PETM was intensely weathered. Additionally, this independent CIA record is nearly identical to the 187Os/188Os record, with coincident maxima and minima, supporting the hypothesis that variations in both proxies are linked to either a change in source or variation in the local environment.
Though BH 9/05 reflects the shape of contemporaneous Os isotope records, the measured 187Os/188Os ratios in BH 9/05 are nearly double those of open ocean seawater (~0.3-0.45) before and after the PETM. This leads to the inference that BH 9/05 represents a restricted environment rather than the open ocean, most likely a basin…
Advisors/Committee Members: Matthew Scott Fantle, Thesis Advisor/Co-Advisor, Lee Kump, Thesis Advisor/Co-Advisor.
Subjects/Keywords: PETM; osmium; Spitsbergen; Arctic; weathering
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APA (6th Edition):
Wieczorek, R. A. (2012). Weathering responses to rapid climate change: analysis of a high resolution osmium isotope record at the Paleocene-Eocene Thermal Maximum. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/14084
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Wieczorek, Rebecca A. “Weathering responses to rapid climate change: analysis of a high resolution osmium isotope record at the Paleocene-Eocene Thermal Maximum.” 2012. Thesis, Penn State University. Accessed March 05, 2021.
https://submit-etda.libraries.psu.edu/catalog/14084.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Wieczorek, Rebecca A. “Weathering responses to rapid climate change: analysis of a high resolution osmium isotope record at the Paleocene-Eocene Thermal Maximum.” 2012. Web. 05 Mar 2021.
Vancouver:
Wieczorek RA. Weathering responses to rapid climate change: analysis of a high resolution osmium isotope record at the Paleocene-Eocene Thermal Maximum. [Internet] [Thesis]. Penn State University; 2012. [cited 2021 Mar 05].
Available from: https://submit-etda.libraries.psu.edu/catalog/14084.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Wieczorek RA. Weathering responses to rapid climate change: analysis of a high resolution osmium isotope record at the Paleocene-Eocene Thermal Maximum. [Thesis]. Penn State University; 2012. Available from: https://submit-etda.libraries.psu.edu/catalog/14084
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Penn State University
29.
Bakey, Christopher Edward.
Analysis of thermal gradients in hyporheic zones of arctic streams to determine flow dynamics.
Degree: 2012, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/15271
► Current methods to calculate seepage in the hyporheic zone by using temperature time series are limited to a one-dimensional approach. Using arctic streams with a…
(more)
▼ Current methods to calculate seepage in the hyporheic zone by using temperature time series are limited to a one-dimensional approach. Using
arctic streams with a known boundary condition at the permafrost the temperature gradients are calculated in three-dimensions in the end of pools and the beginning of the next riffle. Matlab was used to calculated thermal gradients from raw temperature time series data. Matlab was also used to calculate one-dimensional seepage rates using the Hatch method. The strength of vertical temperature gradients was within the same order of magnitude at all locations during both collection periods. The strength of horizontal temperature gradients in riffles U1, U2 and U3 was stronger than those in pools D1, D2, D3. The horizontal temperature gradients were on the same order of magnitude as vertical temperature gradients at the sites U1, U2 and U3. This result suggests horizontal seepage could be as large as vertical seepage in riffles and that current one-dimensional approaches could underestimate overall seepage in riffles.
Advisors/Committee Members: Michael N Gooseff, Thesis Advisor/Co-Advisor.
Subjects/Keywords: Hyporheic Zone; Arctic Streams
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APA (6th Edition):
Bakey, C. E. (2012). Analysis of thermal gradients in hyporheic zones of arctic streams to determine flow dynamics. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/15271
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Bakey, Christopher Edward. “Analysis of thermal gradients in hyporheic zones of arctic streams to determine flow dynamics.” 2012. Thesis, Penn State University. Accessed March 05, 2021.
https://submit-etda.libraries.psu.edu/catalog/15271.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Bakey, Christopher Edward. “Analysis of thermal gradients in hyporheic zones of arctic streams to determine flow dynamics.” 2012. Web. 05 Mar 2021.
Vancouver:
Bakey CE. Analysis of thermal gradients in hyporheic zones of arctic streams to determine flow dynamics. [Internet] [Thesis]. Penn State University; 2012. [cited 2021 Mar 05].
Available from: https://submit-etda.libraries.psu.edu/catalog/15271.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Bakey CE. Analysis of thermal gradients in hyporheic zones of arctic streams to determine flow dynamics. [Thesis]. Penn State University; 2012. Available from: https://submit-etda.libraries.psu.edu/catalog/15271
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Queens University
30.
Blaser, Amy.
Spatial and temporal patterns of carbon dioxide exchange for a wet sedge plant community, Melville Island, NU
.
Degree: Geography, 2016, Queens University
URL: http://hdl.handle.net/1974/13987
► Wet sedge meadows are the most productive vegetation communities in the High Arctic. Preliminary research suggests that this vegetation type is a net carbon sink,…
(more)
▼ Wet sedge meadows are the most productive vegetation communities in the High Arctic. Preliminary research suggests that this vegetation type is a net carbon sink, yet the controls – and the scale at which those controls act – are not well understood. If warming of the High Arctic enhances or limits wet sedge growth, we may observe changes in the percentage of land area occupied by these meadows, resulting in significant alterations to the carbon balance of high arctic landscapes.
Here, the factors controlling carbon dioxide (CO2) exchange of wet sedge meadows are examined at different spatial and temporal scales and environmental data is used to create predictive models of CO2 exchange. Automated and static CO2 exchange systems recorded CO2 exchange at three wet sedge sites at the Cape Bounty Arctic Watershed Observatory (CBAWO), Melville Island, NU, from June to August, 2014. In conjunction, time-series normalized difference vegetation index (NDVI) data were collected to quantify the phenological stage of the wet sedge vegetation type through the growing season, and soil temperature, air temperature, photosynthetically active radiation (PAR), soil moisture, and active layer depth were measured.
Net ecosystem exchange (NEE) measurements indicated dominant plant uptake through photosynthesis, and spectrally separable ‘wet’ and ‘dry’ sedge areas yielded significantly different NEE values at both sampling scales. NDVI measurements indicated that spring greening and peak summer biomass differed between wet and dry areas, but that NDVI was not strongly related to CO2 exchange trends in these systems. Abiotic factors such as air and soil temperature and soil moisture – varying over time and space throughout the season – influenced CO2 exchange to varying degrees at each scale.
Predictive models of ecosystem carbon flux were created using NDVI in combination with environmental measurements as predictors. This facilitated an evaluation, at two scales, of the drivers of CO2 exchange in these communities – both spatially and temporally. Static chamber measurements (bi-weekly) were unsuccessful in modelling CO2 exchange, but autochamber measurements (half-hourly) provided reasonable predictions. I suggest, though, that linear multivariate-regression models are insufficient for capturing variation in these systems, and that more complex models may provide greater success in the future.
Subjects/Keywords: Arctic
;
climate change
;
carbon dioxide
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APA ·
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Manager
APA (6th Edition):
Blaser, A. (2016). Spatial and temporal patterns of carbon dioxide exchange for a wet sedge plant community, Melville Island, NU
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/13987
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Blaser, Amy. “Spatial and temporal patterns of carbon dioxide exchange for a wet sedge plant community, Melville Island, NU
.” 2016. Thesis, Queens University. Accessed March 05, 2021.
http://hdl.handle.net/1974/13987.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Blaser, Amy. “Spatial and temporal patterns of carbon dioxide exchange for a wet sedge plant community, Melville Island, NU
.” 2016. Web. 05 Mar 2021.
Vancouver:
Blaser A. Spatial and temporal patterns of carbon dioxide exchange for a wet sedge plant community, Melville Island, NU
. [Internet] [Thesis]. Queens University; 2016. [cited 2021 Mar 05].
Available from: http://hdl.handle.net/1974/13987.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Blaser A. Spatial and temporal patterns of carbon dioxide exchange for a wet sedge plant community, Melville Island, NU
. [Thesis]. Queens University; 2016. Available from: http://hdl.handle.net/1974/13987
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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Open Access Theses and Dissertations
