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Addis Ababa University
1.
Kassahun, Ture.
OZONE DYNAMICS AND SEASONAL VARIABILITY OVER AFRICA
.
Degree: 2013, Addis Ababa University
URL: http://etd.aau.edu.et/dspace/handle/123456789/1353
► In this thesis results of satellite and in-situ airplane ozone data analysis are presented. Total Ozone Column (TOC) from Total Ozone Mapping Spectrometer (TOMS), and…
(more)
▼ In this thesis results of satellite and in-situ airplane
ozone data analysis are presented.
Total
Ozone Column (TOC) from Total
Ozone Mapping Spectrometer (TOMS), and
ozone enhancements sampled on the cruise flight route from Johannesburg to Vienna
by Measurement of
OZone by Inservice AIrCraft (MOZAIC) at Equatorial Africa and
North Africa are investigated. The work in this thesis is focused on the study of
ozone
transport during stratosphere-troposphere exchange (STE) events over intense STE areas,
and seasonal variability of
ozone over Africa. On very few occasions, at upper troposphere
Equatorial Africa
ozone spikes are observed at a flying altitude of 250-200 hPa. To understand
the events that attribute to spiky MOZAIC
ozone and relative humidity observations,
additional data sets from different data sources were used to examine the observed
events. Vertical wind fields in the regions of low Outgoing Long-wave Radiation (OLR),
very high latent heat and cloud liquid water content transport have indicated presence
of convection and thunderstorm events. Potential vorticity intrusion over equatorial region
introduced enhanced
ozone of stratospheric origin, as revealed by ERA-interim
ozone
data. Both downwelling and upwelling induced by convection and intrusion transported
enhanced
ozone from the stratosphere all the way down to the boundary layer.
We have distinguished source and regions of discharge of MOZAIC
ozone enhancements
observed at a flying altitude of 250-200 hPa over North Africa. Different data
sets from ECMWF-ERA-Interim are used to examine the dynamics associated with the
events. Relative humidity from MOZAIC measurement, longitudinal cross-section of potential
vorticity (PV) and
ozone volume mixing ratio (VMR) over the region of MOZAIC
ozone enhancements confirmed that the observed enhancements are measured within lower
stratosphere. This is mainly due to massive shift in the tropopause level. Longitudinal
cross-section of PV, potential vorticity in isentropic surfaces (IPV) and
ozone VMR revealed
that the first mode of transport is large scale airmass subsidence from the stratosphere
over mid-latitude. Some of these events lead to cross tropopause
ozone transport
xi
to upper troposphere North Africa. The second case is subsidence at polar regions during
North hemisphere winter seasons. IPV is strongly modified as revealed by wind fields.
In addition zonal winds and Rossby waves, which are active during winter seasons, have
strong contribution in modifying potential vorticity and
ozone spatial and temporal distribution.
TOC is analyzed from TOMS satellite data to study its seasonal variability over Africa.
The seasonal variability comparisons in the latitude regions 0-34.50 N and 0-34.50 S show
that
ozone concentration peaks shift from April at North Africa to September near the
equator.
Ozone concentration begins to raise from May to October, and decreasing afterwards
in the Southern part of Africa with highest peaks only between September to
October. This result shows that
ozone concentration…
Advisors/Committee Members: Dr. Gizaw Mingistu (advisor).
Subjects/Keywords: Total Ozone Column (TOC);
OZone
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APA (6th Edition):
Kassahun, T. (2013). OZONE DYNAMICS AND SEASONAL VARIABILITY OVER AFRICA
. (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/1353
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):
Kassahun, Ture. “OZONE DYNAMICS AND SEASONAL VARIABILITY OVER AFRICA
.” 2013. Thesis, Addis Ababa University. Accessed April 18, 2021.
http://etd.aau.edu.et/dspace/handle/123456789/1353.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kassahun, Ture. “OZONE DYNAMICS AND SEASONAL VARIABILITY OVER AFRICA
.” 2013. Web. 18 Apr 2021.
Vancouver:
Kassahun T. OZONE DYNAMICS AND SEASONAL VARIABILITY OVER AFRICA
. [Internet] [Thesis]. Addis Ababa University; 2013. [cited 2021 Apr 18].
Available from: http://etd.aau.edu.et/dspace/handle/123456789/1353.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kassahun T. OZONE DYNAMICS AND SEASONAL VARIABILITY OVER AFRICA
. [Thesis]. Addis Ababa University; 2013. Available from: http://etd.aau.edu.et/dspace/handle/123456789/1353
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Oregon State University
2.
Decker, Fred W. (Fred William), 1917-.
The measurement of the optical thickness of atmospheric ozone.
Degree: PhD, Physics, 1952, Oregon State University
URL: http://hdl.handle.net/1957/51768
Subjects/Keywords: Ozone
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APA (6th Edition):
Decker, Fred W. (Fred William), 1. (1952). The measurement of the optical thickness of atmospheric ozone. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/51768
Chicago Manual of Style (16th Edition):
Decker, Fred W. (Fred William), 1917-. “The measurement of the optical thickness of atmospheric ozone.” 1952. Doctoral Dissertation, Oregon State University. Accessed April 18, 2021.
http://hdl.handle.net/1957/51768.
MLA Handbook (7th Edition):
Decker, Fred W. (Fred William), 1917-. “The measurement of the optical thickness of atmospheric ozone.” 1952. Web. 18 Apr 2021.
Vancouver:
Decker, Fred W. (Fred William) 1. The measurement of the optical thickness of atmospheric ozone. [Internet] [Doctoral dissertation]. Oregon State University; 1952. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/1957/51768.
Council of Science Editors:
Decker, Fred W. (Fred William) 1. The measurement of the optical thickness of atmospheric ozone. [Doctoral Dissertation]. Oregon State University; 1952. Available from: http://hdl.handle.net/1957/51768

Georgia Tech
3.
Li, Jianfeng.
Anthropogenic and natural nitrogen oxides emissions over the United States: Comprehensive evaluations and implications for surface ozone prediction.
Degree: PhD, Earth and Atmospheric Sciences, 2019, Georgia Tech
URL: http://hdl.handle.net/1853/62675
► Nitrogen oxides (NOx = NO + NO2) play a crucial role in the formation of ozone and has significant impacts on the production of secondary…
(more)
▼ Nitrogen oxides (NOx = NO + NO2) play a crucial role in the formation of
ozone and has significant impacts on the production of secondary organic and inorganic aerosols, thus affecting human health, global radiation budget, and climate. Accurate knowledge of NOx emissions is essential for relevant scientific research and air pollution control policies. This thesis evaluates current estimates of anthropogenic and natural NOx emissions over the United States and improves model’s prediction of surface
ozone concentrations by using a 3-D Regional chEmistry and trAnsport Model (REAM) and various types of observations and investigate the impact of thunderstorms on surface NOx and O3 concentrations.
The diurnal cycle of NO2 is a function of emissions, advection, deposition, vertical mixing, and chemistry. Its observations, therefore, provide useful constraints in our understanding of these factors. The REAM simulated diurnal cycles are evaluated by using the DISCOVER-AQ campaign measurements, EPA Air Quality System (AQS) observations, and OMI and GOME-2A tropospheric vertical column densities (TVCDs) products in July 2011 over the Baltimore-Washington region. The model simulations are in reasonably good agreement with the observations except that PANDORA measured NO2 TVCD show much less variation in the early morning and late afternoon than simulated in the model. High resolution (4 km in the horizontal) model simulations are also performed to examine the effects of emission distributions. The overestimation of NO2 concentrations from the 4-km REAM simulation in contrast to the well reproduction of observations by the 36-km REAM suggests that the 2011 National Emission Inventory (NEI2011) provide a good estimate of NOx emissions at the 36-km scale but can’t resolve NOx emission distributions at the 4-km resolution. By analyzing model simulations with the observations, the thesis shows that the diurnal emission profile of NOx is different over the weekend from the weekdays and that weekend emissions are about 1/3 lower than weekdays. Observed
ozone concentrations can be used to evaluate NOx and volatile organic compound (VOC) emissions by using their relationships with
ozone concentrations. The thesis shows that the time when
ozone reaches its daily maximum (peak time) is also related to NOx and VOC emissions. Through model sensitivity analyses of REAM in July 2011 over the contiguous United States (CONUS), it is found that
ozone peak values are more sensitive to NOx emissions while
ozone peak time is more sensitive to VOC emissions in the eastern United States. By such relationships and the comparison between observations and model results, we find that the underestimation of soil NOx emissions leads to a low bias of simulated
ozone peak value in the South, while the overestimation of biogenic isoprene emissions results in earlier than observed
ozone peak time in the Central, South and Southeast regions. The simulated formaldehyde columns, which are higher than satellite measurements, confirm the latter. We illustrate the…
Advisors/Committee Members: Wang, Yuhang (advisor), Huey, Greg (committee member), Weber, Rodney (committee member), Ng, Nga Lee (committee member), Kaiser, Jennifer (committee member).
Subjects/Keywords: NOx ozone
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Li, J. (2019). Anthropogenic and natural nitrogen oxides emissions over the United States: Comprehensive evaluations and implications for surface ozone prediction. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/62675
Chicago Manual of Style (16th Edition):
Li, Jianfeng. “Anthropogenic and natural nitrogen oxides emissions over the United States: Comprehensive evaluations and implications for surface ozone prediction.” 2019. Doctoral Dissertation, Georgia Tech. Accessed April 18, 2021.
http://hdl.handle.net/1853/62675.
MLA Handbook (7th Edition):
Li, Jianfeng. “Anthropogenic and natural nitrogen oxides emissions over the United States: Comprehensive evaluations and implications for surface ozone prediction.” 2019. Web. 18 Apr 2021.
Vancouver:
Li J. Anthropogenic and natural nitrogen oxides emissions over the United States: Comprehensive evaluations and implications for surface ozone prediction. [Internet] [Doctoral dissertation]. Georgia Tech; 2019. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/1853/62675.
Council of Science Editors:
Li J. Anthropogenic and natural nitrogen oxides emissions over the United States: Comprehensive evaluations and implications for surface ozone prediction. [Doctoral Dissertation]. Georgia Tech; 2019. Available from: http://hdl.handle.net/1853/62675
4.
Nishanth T.
Variability of surface ozone and its impact on air
quality over Kannur.
Degree: Physics, 2013, Kannur University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/17848
► Ozone (O3,) produced in the troposphere plays a vital role in the radiative and chemical processes of the atmosphere due to its strong oxidizing capability.Subsequently,…
(more)
▼ Ozone (O3,) produced in the troposphere plays a
vital role in the radiative and chemical processes of the
atmosphere due to its strong oxidizing capability.Subsequently,
surface O3 is one of the ideal trace gases present in the
troposphere which can modulate the chemistry to a larger extent.
Being a prominent green house gas and a good tracer with fairly
small lifetime, the variation in the abundance of ground level O3is
an ideal method to explore the photochemistry and dynamics of the
atmosphere. The chemistry that leads to tropospheric O3 formation
is generally initiated by the photolysis of NO2. In the presence of
solar radiation NO2 photolysis to produce NO and atomic oxygen and
this atomic oxygen reacts with O2 to produce O3. The conversion of
NO to NO2 without O3 occurs through a combination of the reaction
cycles of hydroxyl (OH) or peroxyl radicals (HO2). In these cycles,
OH radicals are converted to HO2 or RO2, through their reaction
with CO or hydrocarbons. The increasing trends in ground levelO3 in
the urban and rural areas of industrialized regions are strongly
linked to the changes in anthropogenic emissions of O3 precursors
and revealed that its key role in imparting global warming and
subsequent climate changes. Over the last few decades, several
studies have revealed that background O3 in the troposphere has
almost doubled that compared to the pre industrial era. In order to
explore surface O3 chemistry and its transport at Kannur, a
tropical coastal site in the state of Kerala, continuous
observations has been going on since 2009 at Kannur University with
the support of ISRO-GBP (AT-CTM) programme. This thesis is focused
on the observations on the variations of ground level O3 mixing
ratio and its precursors at Kannur (11.9oN and 75.4oE, 5m asl), in
north Kerala confined in the coastal belt of Arabian Sea and
Western Ghats. In order to discuss the objectivity effectively, the
thesis is divided into seven chapters.
Summary p. 156-160, References p.
161-176
Advisors/Committee Members: Satheesh Kumar M K.
Subjects/Keywords: Ozone; Atmosphere
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
T, N. (2013). Variability of surface ozone and its impact on air
quality over Kannur. (Thesis). Kannur University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/17848
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):
T, Nishanth. “Variability of surface ozone and its impact on air
quality over Kannur.” 2013. Thesis, Kannur University. Accessed April 18, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/17848.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
T, Nishanth. “Variability of surface ozone and its impact on air
quality over Kannur.” 2013. Web. 18 Apr 2021.
Vancouver:
T N. Variability of surface ozone and its impact on air
quality over Kannur. [Internet] [Thesis]. Kannur University; 2013. [cited 2021 Apr 18].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/17848.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
T N. Variability of surface ozone and its impact on air
quality over Kannur. [Thesis]. Kannur University; 2013. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/17848
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Oregon State University
5.
Liffick, Glenn Lonngren.
An investigation of the removal of ozone by activated charcoal.
Degree: MS, Mechanical Engineering, 1969, Oregon State University
URL: http://hdl.handle.net/1957/46236
► The removal of ozone from an air stream by activated-cocoanut charcoal was investigated from the literature and experimentally. The experimental investigation showed that activated-cocoanut charcoal…
(more)
▼ The removal of
ozone from an air stream by activated-cocoanut
charcoal was investigated from the literature and experimentally.
The experimental investigation showed that activated-cocoanut charcoal
can be used to remove concentrations of
ozone less than 1.0
ppm with high efficiencies. The mechanism of the
ozone removal
appeared to be a function of both the concentration of
ozone entering
the charcoal filter and the detention time of the air stream in the
charcoal filter.
The
ozone-removal capability of a glass fiber superinterception
particulate filter was also investigated.
In addition, possible utilization of activated charcoal for
ozone
removal in trace contaminant control systems is discussed.
Advisors/Committee Members: Boubel, Richard W. (advisor).
Subjects/Keywords: Ozone
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APA ·
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APA (6th Edition):
Liffick, G. L. (1969). An investigation of the removal of ozone by activated charcoal. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/46236
Chicago Manual of Style (16th Edition):
Liffick, Glenn Lonngren. “An investigation of the removal of ozone by activated charcoal.” 1969. Masters Thesis, Oregon State University. Accessed April 18, 2021.
http://hdl.handle.net/1957/46236.
MLA Handbook (7th Edition):
Liffick, Glenn Lonngren. “An investigation of the removal of ozone by activated charcoal.” 1969. Web. 18 Apr 2021.
Vancouver:
Liffick GL. An investigation of the removal of ozone by activated charcoal. [Internet] [Masters thesis]. Oregon State University; 1969. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/1957/46236.
Council of Science Editors:
Liffick GL. An investigation of the removal of ozone by activated charcoal. [Masters Thesis]. Oregon State University; 1969. Available from: http://hdl.handle.net/1957/46236

Georgia Tech
6.
Kubera, Kimberly.
Evaluation of Upper Atmospheric Ozone Data provided by a Differential-Absorption Lidar.
Degree: MS, Earth and Atmospheric Sciences, 2005, Georgia Tech
URL: http://hdl.handle.net/1853/6900
► Ground-level ozone is an environmental and public health issue. Daily ozone forecasts are made to allow people to take precautions to protect their health. For…
(more)
▼ Ground-level
ozone is an environmental and public health issue. Daily
ozone forecasts are made to allow people to take precautions to protect their health. For this study, a prototype laser that measures
ozone concentrations vertically throughout the atmospheric boundary layer was evaluated as tool for
ozone forecasting.
To examine this data, three analyses were performed. First, it was determined if stratification, and thus residual layers, could be seen. This was conducted, in part, by examining hourly mixing heights overlaid onto color-coded NEXLASER charts. Each NEXLASER chart shows the horizontal and spatial distribution of the measured
ozone concentrations during a twenty-four hour period. In the second analysis, the correlation value between the early morning upper-tropospheric
ozone and the maximum 8-hour average surface
ozone concentrations was determined. For the third analysis, a case study on two select groups of days was conducted.
This study suggested that NEXLASER can be used to detect the presence of residual layers and can be used as an aid in predicting peak daily 8-hour average ground-level
ozone concentrations. Specifically, days on which a morning
ozone reservoir layer is most prominent have the most potential to lead to high surface
ozone concentrations later in the day. While more research should be conducted, this study shows how this data could be useful in explaining
ozone events, and thus be an aid to
ozone forecasters.
Advisors/Committee Members: Judith Curry (Committee Chair), Michael E. Chang (Committee Member), Yuhang Wang (Committee Member).
Subjects/Keywords: Ozone
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kubera, K. (2005). Evaluation of Upper Atmospheric Ozone Data provided by a Differential-Absorption Lidar. (Masters Thesis). Georgia Tech. Retrieved from http://hdl.handle.net/1853/6900
Chicago Manual of Style (16th Edition):
Kubera, Kimberly. “Evaluation of Upper Atmospheric Ozone Data provided by a Differential-Absorption Lidar.” 2005. Masters Thesis, Georgia Tech. Accessed April 18, 2021.
http://hdl.handle.net/1853/6900.
MLA Handbook (7th Edition):
Kubera, Kimberly. “Evaluation of Upper Atmospheric Ozone Data provided by a Differential-Absorption Lidar.” 2005. Web. 18 Apr 2021.
Vancouver:
Kubera K. Evaluation of Upper Atmospheric Ozone Data provided by a Differential-Absorption Lidar. [Internet] [Masters thesis]. Georgia Tech; 2005. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/1853/6900.
Council of Science Editors:
Kubera K. Evaluation of Upper Atmospheric Ozone Data provided by a Differential-Absorption Lidar. [Masters Thesis]. Georgia Tech; 2005. Available from: http://hdl.handle.net/1853/6900

Georgia Tech
7.
Little, Jess E.
The reaction of ozone with an aqueous solution of: I thiourea, II sodium chloride.
Degree: MS, Chemistry, 1942, Georgia Tech
URL: http://hdl.handle.net/1853/29839
Subjects/Keywords: Ozone
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Little, J. E. (1942). The reaction of ozone with an aqueous solution of: I thiourea, II sodium chloride. (Masters Thesis). Georgia Tech. Retrieved from http://hdl.handle.net/1853/29839
Chicago Manual of Style (16th Edition):
Little, Jess E. “The reaction of ozone with an aqueous solution of: I thiourea, II sodium chloride.” 1942. Masters Thesis, Georgia Tech. Accessed April 18, 2021.
http://hdl.handle.net/1853/29839.
MLA Handbook (7th Edition):
Little, Jess E. “The reaction of ozone with an aqueous solution of: I thiourea, II sodium chloride.” 1942. Web. 18 Apr 2021.
Vancouver:
Little JE. The reaction of ozone with an aqueous solution of: I thiourea, II sodium chloride. [Internet] [Masters thesis]. Georgia Tech; 1942. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/1853/29839.
Council of Science Editors:
Little JE. The reaction of ozone with an aqueous solution of: I thiourea, II sodium chloride. [Masters Thesis]. Georgia Tech; 1942. Available from: http://hdl.handle.net/1853/29839

Georgia Tech
8.
Wilson, Frederick Samuel.
A study of the effect of pressure on the visible spectrum of ozone.
Degree: MS, Chemistry, 1949, Georgia Tech
URL: http://hdl.handle.net/1853/27047
Subjects/Keywords: Ozone
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APA ·
Chicago ·
MLA ·
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APA (6th Edition):
Wilson, F. S. (1949). A study of the effect of pressure on the visible spectrum of ozone. (Masters Thesis). Georgia Tech. Retrieved from http://hdl.handle.net/1853/27047
Chicago Manual of Style (16th Edition):
Wilson, Frederick Samuel. “A study of the effect of pressure on the visible spectrum of ozone.” 1949. Masters Thesis, Georgia Tech. Accessed April 18, 2021.
http://hdl.handle.net/1853/27047.
MLA Handbook (7th Edition):
Wilson, Frederick Samuel. “A study of the effect of pressure on the visible spectrum of ozone.” 1949. Web. 18 Apr 2021.
Vancouver:
Wilson FS. A study of the effect of pressure on the visible spectrum of ozone. [Internet] [Masters thesis]. Georgia Tech; 1949. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/1853/27047.
Council of Science Editors:
Wilson FS. A study of the effect of pressure on the visible spectrum of ozone. [Masters Thesis]. Georgia Tech; 1949. Available from: http://hdl.handle.net/1853/27047

Virginia Tech
9.
Brazil, Brian Ligar.
Impact of Ozonation on System Performance and Growth Characteristics of Hybrid Striped Bass (Morone chrysops (f) x Morone saxatilis (m)) Reared in Recirculating Aquaculture Systems.
Degree: PhD, Fisheries and Wildlife Sciences, 1997, Virginia Tech
URL: http://hdl.handle.net/10919/30379
► This study was conducted to evaluate the impact of sustained ozone dosages rates (0, 3, 13, 25, and 45 g O3 per kg feed delivered…
(more)
▼ This study was conducted to evaluate the impact of sustained ozone dosages rates (0, 3, 13, 25, and 45 g O3 per kg feed delivered per day)on water quality profile, fish physiology, and growth during a production cycle of hybrid striped bass reared in pilot scale recirculating systems. Nitrogenous wastes and dissolved organic compounds increased linearly (p < 0.01) throughout the trial under both ozonated and unozonated conditions. Ozone treatments 13 and 25 g O3 / kg feed received 170 kg more feed than the control treatment (0 g O3 / kg feed) by the end of trial. The ozonated system received an average 1 kg more feed per day than did the unozonated system, although the unozonated system received 25% more freshwater during the trial. Ozonation increased nitrification efficiency which resulted in a 25% reduction in residual ammonia measured per kilogram of feed delivered.
Biologically degradable organics (CBOD5) were lowered 45% under ozonation when adjusted for daily feed input. Microbial activity as determined by the rate of degradation of DOC was 43% higher in the ozonated environments. Increased environmental quality provided through ozonation did not result in measurable physiological improvements (p 0.05). All parameters monitored except plasma protein and hematocrit values varied significantly (p>0.05) over time. Hemoglobin, plasma protein, and hematocrit values in fish under all rearing conditions were 10.2 ± 0.4 g/dL, 7.1± 0.6 g/dL, and 52.9 ± 1.9%, respectively. Final mean serum chloride level of 115.8 ± 3.4 mE/L and mean glucose level of 186.3 ± 2.1 mg/dL were measured in fish reared at treatments 0, 13, and 25 g O3. Fish reared under ozonated conditions possessed an overall mean growth rate of 2.3 g/day and FCR of 1.58:1. Simultaneously, fish in the unozonated environment gained 1.8 g/day at an FCR of 1.90:1. At the conclusion of the trial, the final mean weight (443 ± 11.6 g) of fish reared in the unozonated environment was significantly lower (p<0.01) than fish reared in the ozone treatments 13, and 25 g O3 (combined mean of 576.6 ±16.4 g).
Subjects/Keywords: ozone
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Brazil, B. L. (1997). Impact of Ozonation on System Performance and Growth Characteristics of Hybrid Striped Bass (Morone chrysops (f) x Morone saxatilis (m)) Reared in Recirculating Aquaculture Systems. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/30379
Chicago Manual of Style (16th Edition):
Brazil, Brian Ligar. “Impact of Ozonation on System Performance and Growth Characteristics of Hybrid Striped Bass (Morone chrysops (f) x Morone saxatilis (m)) Reared in Recirculating Aquaculture Systems.” 1997. Doctoral Dissertation, Virginia Tech. Accessed April 18, 2021.
http://hdl.handle.net/10919/30379.
MLA Handbook (7th Edition):
Brazil, Brian Ligar. “Impact of Ozonation on System Performance and Growth Characteristics of Hybrid Striped Bass (Morone chrysops (f) x Morone saxatilis (m)) Reared in Recirculating Aquaculture Systems.” 1997. Web. 18 Apr 2021.
Vancouver:
Brazil BL. Impact of Ozonation on System Performance and Growth Characteristics of Hybrid Striped Bass (Morone chrysops (f) x Morone saxatilis (m)) Reared in Recirculating Aquaculture Systems. [Internet] [Doctoral dissertation]. Virginia Tech; 1997. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/10919/30379.
Council of Science Editors:
Brazil BL. Impact of Ozonation on System Performance and Growth Characteristics of Hybrid Striped Bass (Morone chrysops (f) x Morone saxatilis (m)) Reared in Recirculating Aquaculture Systems. [Doctoral Dissertation]. Virginia Tech; 1997. Available from: http://hdl.handle.net/10919/30379
10.
Panou, Andreas.
Συνδυαστική επίδραση της επεξεργασίας με αέριο όζον και άλλων μεθόδων συντήρησης στα φυσικοχημικά χαρακτηριστικά και στην επέκταση του χρόνου ζωής φρούτων και λαχανικών.
Degree: 2018, University of Ioannina; Πανεπιστήμιο Ιωαννίνων
URL: http://hdl.handle.net/10442/hedi/44121
► In the present study the combined effect of gaseous ozone treatment and other preservation food methods on physicochemical characteristics and shelf life of fruit and…
(more)
▼ In the present study the combined effect of gaseous ozone treatment and other preservation food methods on physicochemical characteristics and shelf life of fruit and vegetables was investigated. The studied fruits and vegetables were: grape (cv. Sultanina), strawberry (cv. Camarosa), apricot (cv. Bebeko) and fresh-cut lettuce salad. Additionally, gamma irradiation and mild heat treatment were applied on strawberry and passive modified atmosphere packaging on bilayer film PET//LLDPE and citric acid were applied on fresh-cut lettuce salad. Weight loss, firmness, color parameters (L*, a* and b*), total soluble solids, titreatable acidity, pH, volatile compounds, sensory characteristics (appearance, taste and odor) and microbiological indexes (Total mesophilic counts, Yeast and molds counts, Enterobacteriaceae counts, Lactobacillaceae counts and fungal decay) were monitored during cold storage of the commodities above.Ozone treatment at 0,5 ppm improved appearance, taste and odour and increase the shelf life of grapes by 7 days compared to untreated grapes. The application of higher ozone concentrations 1,0 and 1,5 ppm reduce shelf life of stored grapes accelerating the degradation of appearance, taste and odor. The higher shelf life of ozone-treated grapes at 0,5 ppm could be attribute on lower percentage weight loss compared to untreated grapes and on the inhibitory effect of ozone to the tissue-browning enzymes such as polyphenol oxidase, peroxidase and phenylalanine ammonolyase.Citric acid treatment, ozonation at 0,5 ppm and ozonation at 0,5 ppm plus citric acid improved significantly the visual appearance and cut-effect tissue browning index of lettuce compared to untreated ones. Total mesophilic counts and Enterobacteriaceae counts were also reduce significantly after the application of treatments above. Yeast and molds present higher resistance on these applied treatments. An increase by 4 days was achieved in shelf life of lettuces.The application of irradiation increase shelf life of strawberry by 2 days. Same results were observed after the application of blanching, ozonation at 0,5 ppm and ozonation at 0,5 ppm plus blanching. Higher doses of gamma irradiation and ozonation accelerate the degradation of appearance and taste compared to untreated strawberries.The applied ozone concentrations of 0,5, 1,0 and 1,5 ppm improved the appearance and taste of apricots compared to untreated ones. The best results were recorded on ozone treatment at 0,5 ppm. The extension of shelf life was 5 days.As far as concerned physicochemical characteristics, pH and total soluble solids were not affected significantly by the application of ozone treatment. Ozone at low concentrations increase the firmness of fruits compared to untreated ones, while increases the lightness on account of its blanching properties. Both ozonation and irradiation affect significantly titreatable acidity of fruits.
Στην παρούσα διατριβή μελετήθηκε η συνδυαστική επίδραση του αερίου όζοντος και άλλων μεθόδων συντήρησης στα φυσικοχημικά χαρακτηριστικά…
Subjects/Keywords: Όζον; Ozone
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Panou, A. (2018). Συνδυαστική επίδραση της επεξεργασίας με αέριο όζον και άλλων μεθόδων συντήρησης στα φυσικοχημικά χαρακτηριστικά και στην επέκταση του χρόνου ζωής φρούτων και λαχανικών. (Thesis). University of Ioannina; Πανεπιστήμιο Ιωαννίνων. Retrieved from http://hdl.handle.net/10442/hedi/44121
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):
Panou, Andreas. “Συνδυαστική επίδραση της επεξεργασίας με αέριο όζον και άλλων μεθόδων συντήρησης στα φυσικοχημικά χαρακτηριστικά και στην επέκταση του χρόνου ζωής φρούτων και λαχανικών.” 2018. Thesis, University of Ioannina; Πανεπιστήμιο Ιωαννίνων. Accessed April 18, 2021.
http://hdl.handle.net/10442/hedi/44121.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Panou, Andreas. “Συνδυαστική επίδραση της επεξεργασίας με αέριο όζον και άλλων μεθόδων συντήρησης στα φυσικοχημικά χαρακτηριστικά και στην επέκταση του χρόνου ζωής φρούτων και λαχανικών.” 2018. Web. 18 Apr 2021.
Vancouver:
Panou A. Συνδυαστική επίδραση της επεξεργασίας με αέριο όζον και άλλων μεθόδων συντήρησης στα φυσικοχημικά χαρακτηριστικά και στην επέκταση του χρόνου ζωής φρούτων και λαχανικών. [Internet] [Thesis]. University of Ioannina; Πανεπιστήμιο Ιωαννίνων; 2018. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/10442/hedi/44121.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Panou A. Συνδυαστική επίδραση της επεξεργασίας με αέριο όζον και άλλων μεθόδων συντήρησης στα φυσικοχημικά χαρακτηριστικά και στην επέκταση του χρόνου ζωής φρούτων και λαχανικών. [Thesis]. University of Ioannina; Πανεπιστήμιο Ιωαννίνων; 2018. Available from: http://hdl.handle.net/10442/hedi/44121
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
11.
Quarcoo, Mawuena, 19870-.
Ozone-particle associations for public primary school classrooms with mechanical ventilation systems.
Degree: PhD, Public Health, 2018, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/59141/
► The 2001-2002 Lawrence Berkeley National Laboratory (LBNL) nested, crossover-design study explored the operating profiles of two HVAC systems alternated over a period of approximately nine…
(more)
▼ The 2001-2002 Lawrence Berkeley National Laboratory (LBNL) nested, crossover-design study explored the operating profiles of two HVAC systems alternated over a period of approximately nine weeks, including during 2001 Fall school semester, in two pairs of classrooms sited adjacent to one another and equipped with either standard or alternate (low-emissivity) interior finish materials. The present study, a retrospective analysis, included inferring estimated indoor ozone concentrations. Because ozone can react with certain indoor pollutants to generate secondary organic aerosols, a mass-balanced based indoor/outdoor ratio expression was used to model indoor ozone to subsequently model indoor particles from possible ozone-initiated chemistry. When the advanced HVAC system, called IDEC, was running, surface (especially ceiling) reactions dominated ozone loss processes. When either of the standard HVAC systems, or Bard (different percentages of outdoor air intake) was running, damper setting and ventilation and/or gas phase reactions accounted for the majority of the indoor-outdoor ozone difference. In this study, statistical analysis indicated classroom B-A containing carpet (with polypropylene/polyolefin backing) and teaching materials (with bare surfaces) had higher fine particle number counts (PNC; PM0.3-0.5/PM0.5-0.7) than in the other study classrooms. Additionally, elevated humidity coupled with elevated estimated ozone at school A-B yielded comparatively elevated PNC. Mixed models demonstrated IDEC system use (100% outdoor air intake) at SDB-A, especially during weeks 7-9, yielded significantly greater indoor PNC (PM0.3-0.5/PM0.5-0.7) values than in the other study classrooms. Bard (50% outdoor air intake) use in both SDA classrooms (A, B) yielded comparatively greater PNC than IDEC.
Advisors/Committee Members: Shendell, Derek G (chair), Ohman-Strickland, Pamela (internal member), Meng, Qingyu (internal member), Weschler, Charles J (outside member), School of Graduate Studies.
Subjects/Keywords: Ventilation; Ozone
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Quarcoo, Mawuena, 1. (2018). Ozone-particle associations for public primary school classrooms with mechanical ventilation systems. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/59141/
Chicago Manual of Style (16th Edition):
Quarcoo, Mawuena, 19870-. “Ozone-particle associations for public primary school classrooms with mechanical ventilation systems.” 2018. Doctoral Dissertation, Rutgers University. Accessed April 18, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/59141/.
MLA Handbook (7th Edition):
Quarcoo, Mawuena, 19870-. “Ozone-particle associations for public primary school classrooms with mechanical ventilation systems.” 2018. Web. 18 Apr 2021.
Vancouver:
Quarcoo, Mawuena 1. Ozone-particle associations for public primary school classrooms with mechanical ventilation systems. [Internet] [Doctoral dissertation]. Rutgers University; 2018. [cited 2021 Apr 18].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/59141/.
Council of Science Editors:
Quarcoo, Mawuena 1. Ozone-particle associations for public primary school classrooms with mechanical ventilation systems. [Doctoral Dissertation]. Rutgers University; 2018. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/59141/
12.
Kulkarni,R N.
Studies on atmospheric ozone; -.
Degree: Physics, 2015, Gujarat University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/36753
Subjects/Keywords: atmospheric ozone; ozone
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
N, K. (2015). Studies on atmospheric ozone; -. (Thesis). Gujarat University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/36753
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):
N, Kulkarni,R. “Studies on atmospheric ozone; -.” 2015. Thesis, Gujarat University. Accessed April 18, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/36753.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
N, Kulkarni,R. “Studies on atmospheric ozone; -.” 2015. Web. 18 Apr 2021.
Vancouver:
N K. Studies on atmospheric ozone; -. [Internet] [Thesis]. Gujarat University; 2015. [cited 2021 Apr 18].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/36753.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
N K. Studies on atmospheric ozone; -. [Thesis]. Gujarat University; 2015. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/36753
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
13.
Have, Marien.
Effets de l'ozone troposphérique sur le blé tendre (Triticum aestivum L.) : caractérisation de l'endoprotéolyse vacuolaire et du niveau d'oxydation des protéines dans la feuille drapeau : Effect of tropospheric ozone on wheat (Triticum eastivum L.) : characterization of vacuolar endoproteolytic activity and level of oxidized proteins.
Degree: Docteur es, Sciences de l'Univers et Environnement, 2013, Université Paris-Est
URL: http://www.theses.fr/2013PEST1112
► Pas de résumé en français
The present study was undertaken to investigate whether vacuolar endoproteolysis and/or protein carbonylation (measured here with a newly developed method)…
(more)
▼ Pas de résumé en français
The present study was undertaken to investigate whether vacuolar endoproteolysis and/or protein carbonylation (measured here with a newly developed method) were functionally linked and if either of these processes or both could differentiate between ozone sensitive and tolerant wheat cultivars (cvs). Two winter wheat (Triticum aestivum L.) cvs released in 1986 (Soissons) and 2006 (Premio) were grown in the field and exposed to ambient and semi-controlled chronic ozone concentrations, from pre-anthesis to harvest, using a new linear ozone fumigation device that generates gradients of the pollutant. Grain yield and quality were more affected by the ozone treatments in the older cv Soissons that appeared to be the most sensitive. Because stomatal conductance did not differ significantly between the two cvs, differential ozone sensitivity was rather ascribed to differences in the biochemical and molecular responses between the two cvs. Ozone detrimental effects were mainly characterized by premature induction of leaf senescence, causing the shortening of the assimilation and grain-filling periods. Even though Soissons exhibited higher constitutive levels of carbonyl content in total soluble proteins, the increases in protein carbonylation, in response to the ozone treatments, were equivalent in both cvs. Thus basal levels of protein carbonyl seems a more relevant parameters to distinguish between ozone sensitive and tolerant wheat cvs than actual change in this parameter in response to ozone treatments. However, ozone induced more carbonyl groups on Rubisco large subunit (LSU) and small subunit (SSU) in Soissons and this was associated with a more pronounced decline in LSU and SSU contents and a lower Rubisco activity. Increased protein carbonyl levels and losses in total chlorophyll contents were concurrent, suggesting a link between the extent of oxidative stress and senescence development. Moreover, ozone treatments induced a stimulation of endoproteolytic activities that resulted mostly from increases in cysteine protease activities, for both cvs. Surprisingly, total proteolytic and cysteine protease activities were more enhanced in the tolerant cv, whereas elevated proteolysis is usually associated with high sensitivity to environemental stresses, like drought. Expression analysis for three genes encoding papain-like cysteine proteases showed poor correlation with total cysteine protease activities, which suggested that post-transcriptional regulation mechanisms were prevalent over transcriptional ones. Increased endoproteolytic activities were associated with increased protein carbonylation and with a decline in total soluble protein contents. Oxidized proteins could be more susceptible to proteolysis. Therefore, we suggest that ozone-induced ROS caused protein oxidation on one hand and acted as a signal that triggered senescence processes, such as enhanced proteolysis, on the other hand
Advisors/Committee Members: Repellin, Anne (thesis director).
Subjects/Keywords: Ozone; Endo-protease; Blé; Ozone; Endoproteinase; Wheat
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Have, M. (2013). Effets de l'ozone troposphérique sur le blé tendre (Triticum aestivum L.) : caractérisation de l'endoprotéolyse vacuolaire et du niveau d'oxydation des protéines dans la feuille drapeau : Effect of tropospheric ozone on wheat (Triticum eastivum L.) : characterization of vacuolar endoproteolytic activity and level of oxidized proteins. (Doctoral Dissertation). Université Paris-Est. Retrieved from http://www.theses.fr/2013PEST1112
Chicago Manual of Style (16th Edition):
Have, Marien. “Effets de l'ozone troposphérique sur le blé tendre (Triticum aestivum L.) : caractérisation de l'endoprotéolyse vacuolaire et du niveau d'oxydation des protéines dans la feuille drapeau : Effect of tropospheric ozone on wheat (Triticum eastivum L.) : characterization of vacuolar endoproteolytic activity and level of oxidized proteins.” 2013. Doctoral Dissertation, Université Paris-Est. Accessed April 18, 2021.
http://www.theses.fr/2013PEST1112.
MLA Handbook (7th Edition):
Have, Marien. “Effets de l'ozone troposphérique sur le blé tendre (Triticum aestivum L.) : caractérisation de l'endoprotéolyse vacuolaire et du niveau d'oxydation des protéines dans la feuille drapeau : Effect of tropospheric ozone on wheat (Triticum eastivum L.) : characterization of vacuolar endoproteolytic activity and level of oxidized proteins.” 2013. Web. 18 Apr 2021.
Vancouver:
Have M. Effets de l'ozone troposphérique sur le blé tendre (Triticum aestivum L.) : caractérisation de l'endoprotéolyse vacuolaire et du niveau d'oxydation des protéines dans la feuille drapeau : Effect of tropospheric ozone on wheat (Triticum eastivum L.) : characterization of vacuolar endoproteolytic activity and level of oxidized proteins. [Internet] [Doctoral dissertation]. Université Paris-Est; 2013. [cited 2021 Apr 18].
Available from: http://www.theses.fr/2013PEST1112.
Council of Science Editors:
Have M. Effets de l'ozone troposphérique sur le blé tendre (Triticum aestivum L.) : caractérisation de l'endoprotéolyse vacuolaire et du niveau d'oxydation des protéines dans la feuille drapeau : Effect of tropospheric ozone on wheat (Triticum eastivum L.) : characterization of vacuolar endoproteolytic activity and level of oxidized proteins. [Doctoral Dissertation]. Université Paris-Est; 2013. Available from: http://www.theses.fr/2013PEST1112
14.
Verbeke, Thomas.
Développement et quantification des impacts de l’ozone sur la biosphère continentale dans un modèle global de végétation : Developping and quantify the impact of O3 on the continental biosphere in a global vegetation model.
Degree: Docteur es, Météorologie, Océanographie Physique de l’Environnement, 2015, Versailles-St Quentin en Yvelines
URL: http://www.theses.fr/2015VERS026V
► L’ozone (O3) est un gaz reconnu comme un des polluants atmosphériques majeurs du XXIème siècle, de par ses propriétés très oxydantes. Dans les plus basses…
(more)
▼ L’
ozone (O3) est un gaz reconnu comme un des polluants atmosphériques majeurs du XXIème siècle, de par ses propriétés très oxydantes. Dans les plus basses couches de notre atmosphère, ce polluant secondaire est produit par des réactions photochimiques impliquant des précurseurs émis par les activités humaines et la végétation. De nombreuses études expérimentales ont révélées le caractère phytotoxique de l’O3, qui dégrade sévèrement la photosynthèse, réduit le rendement des récoltes et inhibe la croissance des arbres. Afin de quantifier les effets de l’O3 sur les écosystèmes à l’échelle globale, des modèles numériques ont été développés. Dans cette thèse, nous avons principalement développé un nouveau modèle d’impact basé sur le concept dose/réponse au sein du modèle global de végétation ORCHIDEE. L’approche semi-mécaniste utilisée vise à représenter de manière simplifiée les effets du stress oxydatif causés par l’O3 sur la photosynthèse. L’étalonnage des paramètres a été réalisé en utilisant des données physiologiques issues majoritairement d’expériences de fumigation à l’air libre et en chambres à ciel ouvert menées pendant la saison de croissance de plusieurs espèces végétales. Cette étape de calibration a permis de déterminer les paramètres spécifiques à plusieurs types fonctionnels de plantes. La sensibilité du modèle à l’O3 et à son interaction avec le CO2 et le stress hydrique a ensuite été testée. A l’échelle locale, notre modèle d’impact reproduit fidèlement l’allure de la réponse de la photosynthèse observée in situ à l’échelle saisonnière, et l’élévation du CO2 compense partiellement l’impact de l’O3. En outre, le couplage entre la photosynthèse et la conductance stomatique dans ORCHIDEE permet de simuler la limitation des effets de l’O3 par les flux entrants. La fermeture stomatique réduit également la transpiration, ce qui augmente l’humidité du sol et préserve ainsi la végétation d’un stress hydrique accentué. Cependant, les effets observés sur la respiration autotrophe ne sont pas représentés et l’impact sur la surface foliaire est sous-estimé. Afin d’évaluer la performance du modèle, nous avons comparé l’impact simulé sur la productivité nette (NPP) annuelle avec l’effet estimé par les relations empiriques linéaires standards, recommandées par l’UNECE pour évaluer les risques phytotoxiques chez plusieurs types d’écosystèmes. En outre, à l’échelle globale, nous obtenons des résultats similaires aux estimations réalisées avec un autre modèle de végétation munie d’une paramétrisation d’impact différente. Enfin, nous estimons que les concentrations actuelles causent localement une chute de productivité nette totale annuelle allant jusqu’à 11.7% en moyenne dans le nord-est des Etats-Unis, et réduirait le contenu en carbone du sol de 10.9% dans cette région et de 42.5% en Indonésie si la pollution actuelle perdure pendant 50 ans. Ce travail indique que l’impact de l’O3 sur la végétation est non-négligeable dans le modèle ORCHIDEE, et doit être pris en compte dans les études globales du bilan de carbone…
Advisors/Committee Members: Hauglustaine, Didier (thesis director), Lathière, Juliette (thesis director).
Subjects/Keywords: Ozone; Stress; Biosphère; Ozone; Stress; Biosphere; 551.51
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Verbeke, T. (2015). Développement et quantification des impacts de l’ozone sur la biosphère continentale dans un modèle global de végétation : Developping and quantify the impact of O3 on the continental biosphere in a global vegetation model. (Doctoral Dissertation). Versailles-St Quentin en Yvelines. Retrieved from http://www.theses.fr/2015VERS026V
Chicago Manual of Style (16th Edition):
Verbeke, Thomas. “Développement et quantification des impacts de l’ozone sur la biosphère continentale dans un modèle global de végétation : Developping and quantify the impact of O3 on the continental biosphere in a global vegetation model.” 2015. Doctoral Dissertation, Versailles-St Quentin en Yvelines. Accessed April 18, 2021.
http://www.theses.fr/2015VERS026V.
MLA Handbook (7th Edition):
Verbeke, Thomas. “Développement et quantification des impacts de l’ozone sur la biosphère continentale dans un modèle global de végétation : Developping and quantify the impact of O3 on the continental biosphere in a global vegetation model.” 2015. Web. 18 Apr 2021.
Vancouver:
Verbeke T. Développement et quantification des impacts de l’ozone sur la biosphère continentale dans un modèle global de végétation : Developping and quantify the impact of O3 on the continental biosphere in a global vegetation model. [Internet] [Doctoral dissertation]. Versailles-St Quentin en Yvelines; 2015. [cited 2021 Apr 18].
Available from: http://www.theses.fr/2015VERS026V.
Council of Science Editors:
Verbeke T. Développement et quantification des impacts de l’ozone sur la biosphère continentale dans un modèle global de végétation : Developping and quantify the impact of O3 on the continental biosphere in a global vegetation model. [Doctoral Dissertation]. Versailles-St Quentin en Yvelines; 2015. Available from: http://www.theses.fr/2015VERS026V

University of Alberta
15.
Ding, Ning.
Infectious Prion Inactivation in Water and
Wastewater.
Degree: PhD, Department of Civil and Environmental
Engineering, 2013, University of Alberta
URL: https://era.library.ualberta.ca/files/pv63g068h
► Misfolded prions (PrPSc) are well known for their resistance to conventional decontamination processes. The potential risk of contamination of the water environment, as a result…
(more)
▼ Misfolded prions (PrPSc) are well known for their
resistance to conventional decontamination processes. The potential
risk of contamination of the water environment, as a result of the
disposal of specified risk materials (SRM), has raised public
concerns. Ozone is commonly utilized in the water industry for the
inactivation of microbial contaminants and was tested in this
research for its ability to inactivate prions (263K hamster
scrapie). With the applied ozone dose of 7.6-25.7 mg/L, the
efficacy of ozone inactivation of PrPSc was both pH and temperature
dependent. Treatment variables included applied ozone dose
(7.6–25.7 mg/L), contact time (5 s and 5 min), temperature (4°C and
20°C) and pH (pH 4.4, 6.0, and 8.0). The inactivation of PrPSc was
quantified by determining the in vitro destruction of PrPSc
templating properties using the protein misfolding cyclic
amplification (PMCA) assay and bioassay. Highest levels of prion
inactivation (≥4-log) were observed with applied ozone doses of
13.0 and 25.7 mg/L, at pH 4.4 and 20°C. The kinetic modeling of
prion inactivation in phosphate buffered saline (PBS) with applied
ozone dose of 10.8 mg/L at pHs and temperatures described above was
characterized by both Chick-Watson (CW) and efficiency factor Hom
(EFH) models. It was found that the EFH model fit the experimental
data more appropriately. Based on the EFH model, CT values were
determined for 2-log, 3-log, and 4-log inactivation. A comparison
of ozone CT requirements among various pathogens suggests that
prions are more susceptible to ozone degradation than some model
bacteria and protozoa. Subsequently, the ozone inactivation of
infectious prions was assessed in the raw, gravity separated and
dissolved air flotation (DAF) treated rendering wastewater, and in
the municipal final effluent. It was found that the organic load
highly affected prion inactivation by ozone, while DAF treatment
significantly removed the organics and improved the efficacy. At
the applied ozone dose of 44.6 mg/L, a >4-log inactivation
was achieved after 5 min of exposure in the DAF treated rendering
plant wastewater. The results indicated that ozone could serve as a
final barrier for prion inactivation in primary and/or secondary
treated wastewater.
Subjects/Keywords: Prion; Ozone; Wastewater
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ding, N. (2013). Infectious Prion Inactivation in Water and
Wastewater. (Doctoral Dissertation). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/pv63g068h
Chicago Manual of Style (16th Edition):
Ding, Ning. “Infectious Prion Inactivation in Water and
Wastewater.” 2013. Doctoral Dissertation, University of Alberta. Accessed April 18, 2021.
https://era.library.ualberta.ca/files/pv63g068h.
MLA Handbook (7th Edition):
Ding, Ning. “Infectious Prion Inactivation in Water and
Wastewater.” 2013. Web. 18 Apr 2021.
Vancouver:
Ding N. Infectious Prion Inactivation in Water and
Wastewater. [Internet] [Doctoral dissertation]. University of Alberta; 2013. [cited 2021 Apr 18].
Available from: https://era.library.ualberta.ca/files/pv63g068h.
Council of Science Editors:
Ding N. Infectious Prion Inactivation in Water and
Wastewater. [Doctoral Dissertation]. University of Alberta; 2013. Available from: https://era.library.ualberta.ca/files/pv63g068h

Texas A&M University
16.
Wang, Peng.
IMPACTS OF BIOGENIC AND ANTHOROPOGENIC EMISSIONS ON OZONE AND SECONDARY ORGANIC AEROSOL.
Degree: PhD, Civil Engineering, 2018, Texas A&M University
URL: http://hdl.handle.net/1969.1/173459
► Atmospheric fine particles and ozone (O3) are correlated with adverse health effects, visibility reduction, and climate change. In recent decades, China has suffered from the…
(more)
▼ Atmospheric fine particles and
ozone (O3) are correlated with adverse health effects,
visibility reduction, and climate change. In recent decades, China has suffered from the
record-breaking severe haze event and elevated
ozone problems. Recent field measurements
show that organic carbon (OC) was one of the major components during haze events,
and it has been suggested that secondary organic aerosol (SOA) could account for a significant
fraction of the total observed OC. Quantitative knowledge of the contributions of
different emissions sources to SOA and
ozone concentrations is significant to better understand
their formation mechanisms and is useful to develop the effective emission control
strategies. A Community Multiscale Air Quality (CMAQ) model with source-oriented
lumped SAPRC-11 (S11L) photochemical mechanism is applied to determine the contributions
of anthropogenic and biogenic sources to SOA and
ozone concentrations in China.
In China, predicted SOA concentrations are generally higher in summer (10-15 µg·
M^-3) due to large contributions of biogenic emissions within China (country average
~60%) and in winter due to industrial and residential sectors (country average ~78%
total) based on the Multi-resolution Emission Inventory for China (MEIC) emission inventory.
However, the transportation sector (~30-40% vs. ~5% by MEIC) is predicted to
be much more important while the residential (~21-24% vs. ~42%) sector is predicted to
be less important based on The Regional Emission inventory in ASia v2.1(REAS2) emissions.
These discrepancies in source contributions to SOA needs to be further investigated
as the country seeks optimal emission control strategies to fight severe air pollution.
The
ozone attribution scheme based on the three-regime definition was incorporated
into the CMAQ model to quantify NOx and VOC contributions to
ozone concentrations
in China in August 2013. Most of the areas considered by the two-regime approach as
NOx or VOC-limited are classified as transitional under the new three-regime scheme,
and the scattered VOC-limited regimes are located in urban areas. This three-regime approach
represents an improvement from the traditional two-regime approach with only
NOx or VOC-limited regimes. This three-regime method then is applied in the
ozone
source apportionment as well, and it is reported that the industries, transportation, power
and biogenic sources are four major emission contributors to
ozone with different spatial
distributions.
Advisors/Committee Members: Ying, Qi (advisor), Bachelor, Bill (committee member), Brooks, Sarah (committee member), Zhang, Renyi (committee member).
Subjects/Keywords: Ozone; SOA; CMAQ
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Wang, P. (2018). IMPACTS OF BIOGENIC AND ANTHOROPOGENIC EMISSIONS ON OZONE AND SECONDARY ORGANIC AEROSOL. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/173459
Chicago Manual of Style (16th Edition):
Wang, Peng. “IMPACTS OF BIOGENIC AND ANTHOROPOGENIC EMISSIONS ON OZONE AND SECONDARY ORGANIC AEROSOL.” 2018. Doctoral Dissertation, Texas A&M University. Accessed April 18, 2021.
http://hdl.handle.net/1969.1/173459.
MLA Handbook (7th Edition):
Wang, Peng. “IMPACTS OF BIOGENIC AND ANTHOROPOGENIC EMISSIONS ON OZONE AND SECONDARY ORGANIC AEROSOL.” 2018. Web. 18 Apr 2021.
Vancouver:
Wang P. IMPACTS OF BIOGENIC AND ANTHOROPOGENIC EMISSIONS ON OZONE AND SECONDARY ORGANIC AEROSOL. [Internet] [Doctoral dissertation]. Texas A&M University; 2018. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/1969.1/173459.
Council of Science Editors:
Wang P. IMPACTS OF BIOGENIC AND ANTHOROPOGENIC EMISSIONS ON OZONE AND SECONDARY ORGANIC AEROSOL. [Doctoral Dissertation]. Texas A&M University; 2018. Available from: http://hdl.handle.net/1969.1/173459

Texas A&M University
17.
Smyth, Alison Michelle.
The Effects of Ozone Deposition and Dissolved Organic Matter on Manganese Speciation in the Surface Ocean.
Degree: MS, Oceanography, 2014, Texas A&M University
URL: http://hdl.handle.net/1969.1/153557
► Despite the known reactivity of ozone (O_(3)) in water and ozone’s environmental importance in the atmosphere, there are relatively few studies published examining the chemistry…
(more)
▼ Despite the known reactivity of
ozone (O_(3)) in water and ozone’s environmental importance in the atmosphere, there are relatively few studies published examining the chemistry of O_(3) in seawater. This study focused on developing a flow injection analysis (FIA) chemiluminescence system to measure Mn(II) in order to investigate the effect of O_(3) deposition to the sea surface on Mn speciation. Modifications to earlier FIA systems had to be made in order to accommodate the relatively high concentrations of Mn(II) (200 nmol/kg) in these experiments. Experiments were also conducted where seawater containing different concentrations of Mn(IV) particles and organic carbon were exposed to gas streams containing different levels of O_(3).
Ozone was not found to affect the concentration of Mn(II) in seawater.
Advisors/Committee Members: Yvon-Lewis, Shari A (advisor), Liss, Peter S (committee member), Chapman, Piers (committee member), Brooks, Sarah D (committee member).
Subjects/Keywords: Manganese; Seawater; Ozone
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Smyth, A. M. (2014). The Effects of Ozone Deposition and Dissolved Organic Matter on Manganese Speciation in the Surface Ocean. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/153557
Chicago Manual of Style (16th Edition):
Smyth, Alison Michelle. “The Effects of Ozone Deposition and Dissolved Organic Matter on Manganese Speciation in the Surface Ocean.” 2014. Masters Thesis, Texas A&M University. Accessed April 18, 2021.
http://hdl.handle.net/1969.1/153557.
MLA Handbook (7th Edition):
Smyth, Alison Michelle. “The Effects of Ozone Deposition and Dissolved Organic Matter on Manganese Speciation in the Surface Ocean.” 2014. Web. 18 Apr 2021.
Vancouver:
Smyth AM. The Effects of Ozone Deposition and Dissolved Organic Matter on Manganese Speciation in the Surface Ocean. [Internet] [Masters thesis]. Texas A&M University; 2014. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/1969.1/153557.
Council of Science Editors:
Smyth AM. The Effects of Ozone Deposition and Dissolved Organic Matter on Manganese Speciation in the Surface Ocean. [Masters Thesis]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/153557

University of Florida
18.
Portugal Atencio, Sherlie Eileen.
Design and Improvement of Dielectric Barrier Discharge (DBD) Reactors for Ozone Generation in Atmospheric Air.
Degree: PhD, Electrical and Computer Engineering, 2018, University of Florida
URL: https://ufdc.ufl.edu/UFE0052178
► This document reports the experimental characterization of ozone generation in surface dielectric barrier discharge plasma in atmospheric air. First, ozone production is studied as a…
(more)
▼ This document reports the experimental characterization of
ozone generation in surface dielectric barrier discharge plasma in atmospheric air. First,
ozone production is studied as a function of the dielectric barrier properties by plotting
ozone levels against the effective thickness obtained from ten different dielectric materials. This is done for two combinations of voltage and frequency. The influence of the operating frequency over
ozone generation is studied by varying the frequency range, while keeping the voltage constant. From these two sets of experiments, power data is extracted to establish a correlation between
ozone production and power consumption of the plasma reactor, including
ozone quenching effects at extreme power conditions. This study also includes the proposal of a novel plasma reactor, named Fan reactor, whose purpose is to enhance the spatio-temporal
ozone distribution in an enclosure. The effectiveness of this design is analyzed through stereoscopic particle image velocimetry and its improvement against a conventional comb design is demonstrated. ( en )
Advisors/Committee Members: LIN,JENSHAN (committee chair), UMAN,MARTIN A (committee member), MOORE,ROBERT C (committee member), JOHNSON,JUDITH A (committee member).
Subjects/Keywords: ozone – plasma – sdbd
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Portugal Atencio, S. E. (2018). Design and Improvement of Dielectric Barrier Discharge (DBD) Reactors for Ozone Generation in Atmospheric Air. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0052178
Chicago Manual of Style (16th Edition):
Portugal Atencio, Sherlie Eileen. “Design and Improvement of Dielectric Barrier Discharge (DBD) Reactors for Ozone Generation in Atmospheric Air.” 2018. Doctoral Dissertation, University of Florida. Accessed April 18, 2021.
https://ufdc.ufl.edu/UFE0052178.
MLA Handbook (7th Edition):
Portugal Atencio, Sherlie Eileen. “Design and Improvement of Dielectric Barrier Discharge (DBD) Reactors for Ozone Generation in Atmospheric Air.” 2018. Web. 18 Apr 2021.
Vancouver:
Portugal Atencio SE. Design and Improvement of Dielectric Barrier Discharge (DBD) Reactors for Ozone Generation in Atmospheric Air. [Internet] [Doctoral dissertation]. University of Florida; 2018. [cited 2021 Apr 18].
Available from: https://ufdc.ufl.edu/UFE0052178.
Council of Science Editors:
Portugal Atencio SE. Design and Improvement of Dielectric Barrier Discharge (DBD) Reactors for Ozone Generation in Atmospheric Air. [Doctoral Dissertation]. University of Florida; 2018. Available from: https://ufdc.ufl.edu/UFE0052178
19.
Sundaram, Vijay.
Developing Ozone-Biofiltration Treatment Processes for Potable Reuse Applications.
Degree: 2019, University of Nevada – Reno
URL: http://hdl.handle.net/11714/6655
► Ozone-biological activated carbon filtration (ozone-BAC) treatment plays a major role in advanced water treatment (AWT) for potable reuse applications in locations where reverse osmosis (RO)…
(more)
▼ Ozone-biological activated carbon filtration (
ozone-BAC) treatment plays a major role in advanced water treatment (AWT) for potable reuse applications in locations where reverse osmosis (RO) treatment is not cost effective and/or feasible. However, regulators, designers, and operators are ambiguous about long-term
ozone-BAC reliability and mechanisms involved in the removal of certain contaminants of emerging concern (CECs) such as N-Nitrosodimethylamine (NDMA) and perfluorooctanoic acid (PFOA), and bulk organics such as total organic carbon (TOC). For 16 months, two parallel BAC filters were operated at different loading rates and empty bed contact times (EBCTs) of 10 minutes and 20 minutes treating up to 60,000 and 30,000 bed volumes (BVs), respectively, of sand filtered effluent from a municipal water resource recovery facility. BAC 1 (EBCT = 10 min) and BAC 2 (EBCT = 20 min) used Filtrasorb 400 (F400) granular activated carbon (GAC) as filter media, with equal bed depths. NDMA was generated after ozonation. Longer acclimation time (140 days or 20,000 BVs) was required for non-carbon-based (e.g., biodegradation) removal of NDMA in BAC 1. Three distinct phases were observed for NDMA removal: an initial phase dominated by carbon-based mechanisms (e.g., adsorption), the second phase influenced by both carbon- and non-carbon-based mechanisms and the third phase dominated by non-carbon-based mechanisms. In BAC 1, desorption of CECs such as sulfamethoxazole, DEET, and sucralose was observed after 450 days of operation (or 60,000 BVs). In BAC 2, almost all CECs, excluding NDMA, were removed consistently throughout the study. BAC 1 effluent TOC plateaued at around 6 mg/L, whereas BAC 2 effluent plateaued at around 4 mg/L. Under plateau conditions, BAC 1 and BAC 2 appear to have a gross TOC removal potential of around 0.2 to 0.3 kg/d/m3 of carbon. A comparative analysis of findings from this study and results from a past
ozone-BAC study shows that higher TOC removal capacity was observed in BAC with shorter EBCT and upstream sand filter compared to BAC with longer EBCT and upstream membrane filter. TOC-based specific UV absorbance (SUVA) was recommended for continuous online monitoring of
ozone-BAC performance.
Advisors/Committee Members: Pagilla, Krishna (advisor), Marchand, Eric (committee member), Yang, Yu (committee member), Hiibel, Sage (committee member), Verburg, Paul (committee member).
Subjects/Keywords: Biofiltration; Ozone; Ozone-BAC; Ozone/BAF; Potable Reuse; Water Reuse
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sundaram, V. (2019). Developing Ozone-Biofiltration Treatment Processes for Potable Reuse Applications. (Thesis). University of Nevada – Reno. Retrieved from http://hdl.handle.net/11714/6655
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):
Sundaram, Vijay. “Developing Ozone-Biofiltration Treatment Processes for Potable Reuse Applications.” 2019. Thesis, University of Nevada – Reno. Accessed April 18, 2021.
http://hdl.handle.net/11714/6655.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sundaram, Vijay. “Developing Ozone-Biofiltration Treatment Processes for Potable Reuse Applications.” 2019. Web. 18 Apr 2021.
Vancouver:
Sundaram V. Developing Ozone-Biofiltration Treatment Processes for Potable Reuse Applications. [Internet] [Thesis]. University of Nevada – Reno; 2019. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/11714/6655.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sundaram V. Developing Ozone-Biofiltration Treatment Processes for Potable Reuse Applications. [Thesis]. University of Nevada – Reno; 2019. Available from: http://hdl.handle.net/11714/6655
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Georgia Tech
20.
Cheng, Ye.
Tropospheric O3 modeling study: Contributions of anthropogenic and biogenic sources to O3-CO and O3-CH2O correlations.
Degree: PhD, Earth and Atmospheric Sciences, 2018, Georgia Tech
URL: http://hdl.handle.net/1853/61150
► Tropospheric O3 and CO are major pollutants in the troposphere. Strong correlation between O3 and CO was observed during the DISCOVER-AQ aircraft experiment in July…
(more)
▼ Tropospheric O3 and CO are major pollutants in the troposphere. Strong correlation between O3 and CO was observed during the DISCOVER-AQ aircraft experiment in July 2011 over the Washington-Baltimore area. The observed correlation does not vary significantly with time or altitude in the boundary layer. The observations are simulated well by a regional chemical transport model. We analyze the model results to understand the factors contributing to the observed O3-CO regression slope, which has been used in past studies to estimate the anthropogenic O3 production amount. We trace separately four different CO sources: primary anthropogenic emissions, oxidation of anthropogenic VOCs, oxidation of biogenic isoprene, and transport from the lateral and upper model boundaries. Modeling analysis suggests that the contribution from biogenic isoprene oxidation to the observed O3-CO regression slope is as large as that from primary anthropogenic CO emissions. As a result of decrease of anthropogenic primary CO emissions during the past decades, biogenic CO from oxidation of isoprene is increasingly important. Consequently, observed and simulated O3-CO regression slopes can no longer be used directly with an anthropogenic CO emission inventory to quantify anthropogenic O3 production over the United States. The consistent enhancement of O3 relative to CO observed in the boundary layer, as indicated by the O3-CO regression slope, provides a useful constraint on model photochemistry and emissions. As an extension, we analyze the scenario of O3-CO regression slopes in the entire United States and China regions. The O3-CO regression slope ~ 0.3 is simulated over the eastern outflow regions over the ocean. Over the eastern inland regions of both countries, the O3-CO regression slope is lower than that over the outflow region, reflecting in part continuous O3 production in the outflow region. The simulation result shows that the proportion of contribution from biogenic isoprene to the regressed O3-CO slopes various depending on the corresponding local emission scenario. While biogenic isoprene oxidation makes a comparable contribution as anthropogenic emissions in the eastern US, the latter dominates over eastern China. Over the western inland regions of both countries, the O3-CO regression slope can be higher than the eastern inland regions due to transport from lateral and upper boundaries. The observations of O3-CO regression slope provide the means to understand the relative importance of anthropogenic and biogenic emissions on O3 as well as transport. In addition to O3-CO, strong correlations and consistent linear regression slopes of O3-CH2O and CO-CH2O were also observed during the DISCOVER-AQ aircraft experiment in July 2011 over the Washington-Baltimore area. Same as CO, we also analyze the model results to understand the factors contributing to the observed O3-CH2O regression slope by tracing separately three different CH2O sources: primary secondary anthropogenic sources, biogenic isoprene oxidation, and transport from model…
Advisors/Committee Members: Wang, Yuhang (advisor), Deng, Yi (committee member), Ng, Nga Lee (committee member), Weber, Rodney (committee member), Crawford, James (committee member).
Subjects/Keywords: Ozone; Formaldehyde; Carbon monoxide; Correlation; Regression slope; Anthropogenic; Biogenic; Ozone prediction; Ozone estimator; Alkanes; VOCs
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Cheng, Y. (2018). Tropospheric O3 modeling study: Contributions of anthropogenic and biogenic sources to O3-CO and O3-CH2O correlations. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/61150
Chicago Manual of Style (16th Edition):
Cheng, Ye. “Tropospheric O3 modeling study: Contributions of anthropogenic and biogenic sources to O3-CO and O3-CH2O correlations.” 2018. Doctoral Dissertation, Georgia Tech. Accessed April 18, 2021.
http://hdl.handle.net/1853/61150.
MLA Handbook (7th Edition):
Cheng, Ye. “Tropospheric O3 modeling study: Contributions of anthropogenic and biogenic sources to O3-CO and O3-CH2O correlations.” 2018. Web. 18 Apr 2021.
Vancouver:
Cheng Y. Tropospheric O3 modeling study: Contributions of anthropogenic and biogenic sources to O3-CO and O3-CH2O correlations. [Internet] [Doctoral dissertation]. Georgia Tech; 2018. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/1853/61150.
Council of Science Editors:
Cheng Y. Tropospheric O3 modeling study: Contributions of anthropogenic and biogenic sources to O3-CO and O3-CH2O correlations. [Doctoral Dissertation]. Georgia Tech; 2018. Available from: http://hdl.handle.net/1853/61150

University of Edinburgh
21.
Fenney, Gareth.
A global inventory of ecosystem sources of methyl bromide, an ozone destroying gas.
Degree: 2008, University of Edinburgh
URL: http://hdl.handle.net/1842/2476
► Stratospheric ozone depletion is affected by halogen radicals, such as bromine, which is 40 times more effective at depleting ozone than chlorine. Methyl bromide, the…
(more)
▼ Stratospheric
ozone depletion is affected by halogen radicals, such as bromine, which is 40 times more effective at depleting
ozone than chlorine. Methyl bromide, the largest contributor of bromine to the stratosphere is both naturally and anthropogenically produced. Biomass burning, salt marsh and agriculture are reported as the largest natural sources. However, there exists a need for a global inventory as current budget estimates are uncertain, based on limited data and show a 45Gg yr-1 discrepancy between identified sources and sinks. This study re-evaluates available data and estimates global emissions using GIS. The annual flux from land cover, biomass burning and agriculture is in excess of 66.77Gg yr-1, which is more than 15Gg yr-1 greater than previously thought. The recently identified forest soil source has been shown to be significant, contributing more than 15Gg yr-1, whilst grassland sinks have been shown to degrade less than previously thought.
Advisors/Committee Members: Mackaness, William, Heal, Mathew.
Subjects/Keywords: Methyl Bromide; Ozone; GIS; Extrapolation
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Fenney, G. (2008). A global inventory of ecosystem sources of methyl bromide, an ozone destroying gas. (Thesis). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/2476
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):
Fenney, Gareth. “A global inventory of ecosystem sources of methyl bromide, an ozone destroying gas.” 2008. Thesis, University of Edinburgh. Accessed April 18, 2021.
http://hdl.handle.net/1842/2476.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Fenney, Gareth. “A global inventory of ecosystem sources of methyl bromide, an ozone destroying gas.” 2008. Web. 18 Apr 2021.
Vancouver:
Fenney G. A global inventory of ecosystem sources of methyl bromide, an ozone destroying gas. [Internet] [Thesis]. University of Edinburgh; 2008. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/1842/2476.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Fenney G. A global inventory of ecosystem sources of methyl bromide, an ozone destroying gas. [Thesis]. University of Edinburgh; 2008. Available from: http://hdl.handle.net/1842/2476
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
22.
Anila Alex; Prof. K. Mohankumar.
Spatio-temporal Variability of Atmospheric Ozone over Indian Subcontinent and its Relation to Meteorological Parameters.
Degree: 2013, Cochin University of Science and Technology
URL: http://dyuthi.cusat.ac.in/purl/5107
► Ozone present in the atmosphere not only absorbs the biologically harmful ultraviolet radiation but also is an important ingredient of the climate system. The radiative…
(more)
▼ Ozone present in the atmosphere not only absorbs the biologically harmful ultraviolet
radiation but also is an important ingredient of the climate system. The radiative
absorption properties of ozone make it a determining factor in the structure of the
atmosphere. Ozone in the troposphere has many negative impacts on humans and other
living beings. Another significant aspect is the absorption of outgoing infrared radiation by
ozone thus acting as a greenhouse gas. The variability of ozone in the atmosphere involves
many interconnections with the incoming and outgoing radiation, temperature circulation
etc. Hence ozone forms an important part of chemistry-climate as well as radiative
transfer models. This aspect also makes the quantification of ozone more important. The
discovery of Antarctic ozone hole and the role of anthropogenic activities in causing it
made it possible to plan and implement necessary preventive measures. Continuous
monitoring of ozone is also necessary to identify the effect of these preventive steps.
The reactions involving the formation and destruction of ozone are influenced significantly
by the temperature fluctuations of the atmosphere. On the other hand the variations in
ozone can change the temperature structure of the atmosphere. Indian subcontinent is a
region having large weather and climate variability which is evident from the large
interannual variability of monsoon system over the region. Nearly half of Indian region
comprises the tropical region. Most of ozone is formed in the tropical region and
transported to higher latitudes. The formation and transport of ozone can be influenced by
changes in solar radiation and various atmospheric circulation features. Besides industrial
activities and vehicular traffic is more due to its large population. This may give rise to an
increase in the production of tropospheric ozone which is greenhouse gas. Hence it
becomes necessary to monitor the atmospheric ozone over this region. This study probes
into the spatial distribution and temporal evolution of ozone over Indian subcontinent and
discusses the contributing atmospheric parameters.
Subjects/Keywords: atmosphere; Ozone; Ultraviolet radiation
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mohankumar, A. A. P. K. (2013). Spatio-temporal Variability of Atmospheric Ozone over Indian Subcontinent and its Relation to Meteorological Parameters. (Thesis). Cochin University of Science and Technology. Retrieved from http://dyuthi.cusat.ac.in/purl/5107
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):
Mohankumar, Anila Alex; Prof. K.. “Spatio-temporal Variability of Atmospheric Ozone over Indian Subcontinent and its Relation to Meteorological Parameters.” 2013. Thesis, Cochin University of Science and Technology. Accessed April 18, 2021.
http://dyuthi.cusat.ac.in/purl/5107.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mohankumar, Anila Alex; Prof. K.. “Spatio-temporal Variability of Atmospheric Ozone over Indian Subcontinent and its Relation to Meteorological Parameters.” 2013. Web. 18 Apr 2021.
Vancouver:
Mohankumar AAPK. Spatio-temporal Variability of Atmospheric Ozone over Indian Subcontinent and its Relation to Meteorological Parameters. [Internet] [Thesis]. Cochin University of Science and Technology; 2013. [cited 2021 Apr 18].
Available from: http://dyuthi.cusat.ac.in/purl/5107.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mohankumar AAPK. Spatio-temporal Variability of Atmospheric Ozone over Indian Subcontinent and its Relation to Meteorological Parameters. [Thesis]. Cochin University of Science and Technology; 2013. Available from: http://dyuthi.cusat.ac.in/purl/5107
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Cornell University
23.
Kelleher, Clarice.
An Imaging Study Of The Photodissociation Of Ozone In The Huggins Band And O(1D) Reaction And Deactivation.
Degree: PhD, Chemistry and Chemical Biology, 2013, Cornell University
URL: http://hdl.handle.net/1813/33834
► Velocity mapped imaging (VMI) is used to study the photodissociation and reaction dynamics in both single and crossed molecular beams. In this dissertation the focus…
(more)
▼ Velocity mapped imaging (VMI) is used to study the photodissociation and reaction dynamics in both single and crossed molecular beams. In this dissertation the focus of these techniques is on questions of atmospheric importance but the results also contribute to an understanding of reactions that take place by multiple pathways. The first part of the dissertation focuses on the dissociation of
ozone in the Huggins band. Velocity - mapped images and O(3P2) yield spectra are analyzed to determine the relative O2 electronic and vibrational populations and to provide an estimation of the rotational population as characterized by a temperature. O2 images are also obtained to gain insight into the REMPI detection of O2 and the spectroscopy of the two lowest Rydberg states of O2, d 1[PI]g and C 3[PI]g. The second part of the dissertation describes the development of a crossed molecular beam apparatus. The apparatus allows for the use of VMI techniques for deactivating and reactive collisions with state-selective detection methods. Initial results for the electronic deactivation of O(1D) to ground state O(3P) on collision with O2 and N2 are reported. Within the dual-beam apparatus, a delayed detection method is developed to minimize background. In the final part of the dissertation, the vibrational and rotational distribution of NO from the O(1D) + N2O reaction is determined through analysis of the NO spectra between 220 - 246nm. An explanation is suggested for the differences in NO vibrational distribution observed in our apparatus compared to those of others who have also investigated this reaction.
Advisors/Committee Members: Davis, Harry Floyd (chair), Houston, Paul Lyon (coChair), Park, Jiwoong (committee member), Ezra, Gregory Sion (committee member).
Subjects/Keywords: Ozone Photodissocitation; O(1D) deactivation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kelleher, C. (2013). An Imaging Study Of The Photodissociation Of Ozone In The Huggins Band And O(1D) Reaction And Deactivation. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/33834
Chicago Manual of Style (16th Edition):
Kelleher, Clarice. “An Imaging Study Of The Photodissociation Of Ozone In The Huggins Band And O(1D) Reaction And Deactivation.” 2013. Doctoral Dissertation, Cornell University. Accessed April 18, 2021.
http://hdl.handle.net/1813/33834.
MLA Handbook (7th Edition):
Kelleher, Clarice. “An Imaging Study Of The Photodissociation Of Ozone In The Huggins Band And O(1D) Reaction And Deactivation.” 2013. Web. 18 Apr 2021.
Vancouver:
Kelleher C. An Imaging Study Of The Photodissociation Of Ozone In The Huggins Band And O(1D) Reaction And Deactivation. [Internet] [Doctoral dissertation]. Cornell University; 2013. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/1813/33834.
Council of Science Editors:
Kelleher C. An Imaging Study Of The Photodissociation Of Ozone In The Huggins Band And O(1D) Reaction And Deactivation. [Doctoral Dissertation]. Cornell University; 2013. Available from: http://hdl.handle.net/1813/33834

Cornell University
24.
Gadsden, Michael.
The Economics Of Gasoline Regulation: Price Impacts And Consumer Costs Of Environmental Air Quality Programs.
Degree: M.S., Agricultural Economics, Agricultural Economics, 2011, Cornell University
URL: http://hdl.handle.net/1813/29157
► This research examines economic impacts of two gasoline regulations designed to combat tropospheric ozone pollution. I construct several fixed effects econometric models to assess impacts…
(more)
▼ This research examines economic impacts of two gasoline regulations designed to combat tropospheric
ozone pollution. I construct several fixed effects econometric models to assess impacts of reformulated gasoline and low volatility gasoline on retail gasoline prices and consumer costs. I estimate that reformulated gasoline has had a positive and statistically significant impact on real fuel prices of approximately 3.4 to 6.0 cents per gallon. I estimate that federal low volatility gasoline has had an insignificant price impact of 0.0 to 0.8 cents per gallon, but find that state-level controls more stringent than federal standards may have increased prices by over 8.0 cents per gallon. I also find that both reformulated gasoline and low volatility gasoline price effects likely vary substantially between cities. I present a framework for examining changes in welfare and estimate that over 15 years the reformulated gasoline program has cost consumers between 15.1 billion and 39.0 billion.
Advisors/Committee Members: Bento, Antonio Miguel R. (chair), Boisvert, Richard N (committee member).
Subjects/Keywords: Clean Air Act; Gasoline; Ozone
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gadsden, M. (2011). The Economics Of Gasoline Regulation: Price Impacts And Consumer Costs Of Environmental Air Quality Programs. (Masters Thesis). Cornell University. Retrieved from http://hdl.handle.net/1813/29157
Chicago Manual of Style (16th Edition):
Gadsden, Michael. “The Economics Of Gasoline Regulation: Price Impacts And Consumer Costs Of Environmental Air Quality Programs.” 2011. Masters Thesis, Cornell University. Accessed April 18, 2021.
http://hdl.handle.net/1813/29157.
MLA Handbook (7th Edition):
Gadsden, Michael. “The Economics Of Gasoline Regulation: Price Impacts And Consumer Costs Of Environmental Air Quality Programs.” 2011. Web. 18 Apr 2021.
Vancouver:
Gadsden M. The Economics Of Gasoline Regulation: Price Impacts And Consumer Costs Of Environmental Air Quality Programs. [Internet] [Masters thesis]. Cornell University; 2011. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/1813/29157.
Council of Science Editors:
Gadsden M. The Economics Of Gasoline Regulation: Price Impacts And Consumer Costs Of Environmental Air Quality Programs. [Masters Thesis]. Cornell University; 2011. Available from: http://hdl.handle.net/1813/29157

University of Saskatchewan
25.
Roth, Christopher Z.
Atmospheric ozone retrieval using radiance measurements from the Chappuis and Hartley-Huggins absorption bands.
Degree: 2007, University of Saskatchewan
URL: http://hdl.handle.net/10388/etd-03262007-164913
► The monitoring of global ozone in the atmosphere is a necessary prerequisite to understanding atmospheric chemistry and managing atmospheric constituents. Satellite systems have been developed…
(more)
▼ The monitoring of global
ozone in the atmosphere is a necessary prerequisite to understanding atmospheric chemistry and managing atmospheric constituents. Satellite systems have been developed to measure
ozone and other constituents accurately on a global basis. However, within this area there is considerable room for advancement in the techniques used to measure
ozone from a satellite platform.The Canadian instrument OSIRIS onboard the Swedish-led satellite Odin contains an optical spectrograph that is used for measuring limb radiance in the atmosphere. There are various proven techniques to convert limb radiance data into
ozone density profiles. This work presents a new technique that combines radiance data from both the Chappuis and Hartley-Huggins bands to retrieve
ozone density. The new technique extends the current upper limit of Chappuis-only retrievals from 40 km to 60 km.The major portion of this work describes the implementation of this new technique. Briefly, a Multiplicative Algebraic Reconstructive Technique, together with the SaskTRAN radiative transfer model, is used to invert the limb radiance data into
ozone density profiles.An overview of the resulting
ozone density profiles is presented together with comparisons against other
ozone products as a first order verification of the results.This work will be used to produce a new
ozone data set from the OSIRIS limb radiance data consisting of
ozone density profiles that are valid to 60 km.
Advisors/Committee Members: Llewellyn, Edward J., Degenstein, Douglas A., Xiao, Chijin, St.-Maurice, Jean-Pierre, Manson, Alan, Koustov, Alexandre V. (Sasha), Dodds, David E..
Subjects/Keywords: ozone retrieval
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Roth, C. Z. (2007). Atmospheric ozone retrieval using radiance measurements from the Chappuis and Hartley-Huggins absorption bands. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/etd-03262007-164913
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):
Roth, Christopher Z. “Atmospheric ozone retrieval using radiance measurements from the Chappuis and Hartley-Huggins absorption bands.” 2007. Thesis, University of Saskatchewan. Accessed April 18, 2021.
http://hdl.handle.net/10388/etd-03262007-164913.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Roth, Christopher Z. “Atmospheric ozone retrieval using radiance measurements from the Chappuis and Hartley-Huggins absorption bands.” 2007. Web. 18 Apr 2021.
Vancouver:
Roth CZ. Atmospheric ozone retrieval using radiance measurements from the Chappuis and Hartley-Huggins absorption bands. [Internet] [Thesis]. University of Saskatchewan; 2007. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/10388/etd-03262007-164913.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Roth CZ. Atmospheric ozone retrieval using radiance measurements from the Chappuis and Hartley-Huggins absorption bands. [Thesis]. University of Saskatchewan; 2007. Available from: http://hdl.handle.net/10388/etd-03262007-164913
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University
26.
Watson, Matthew Raymond.
Chamber Measurements of Trace Gas Exchanges for Several Oak Species Exposed to Ozone and Drought.
Degree: MS, Atmospheric Sciences, 2016, Texas A&M University
URL: http://hdl.handle.net/1969.1/159083
► Several species of oak were used in a series of chamber based experiments. The species of oaks chosen (Quercus alba, muehlenbergii, and virginiana) were selected…
(more)
▼ Several species of oak were used in a series of chamber based experiments. The species of oaks chosen (Quercus alba, muehlenbergii, and virginiana) were selected because they are all emitters of the volatile organic compound isoprene. Isoprene emissions as well as several physiological parameters such as photosynthesis and stomatal conductance were monitored under normal conditions, as well as while stressors such as drought and high external
ozone were introduced.
Ozone fluxes to the plants were partitioned into stomatal and surface fluxes for leaves treated with an isoprenoid coating as well as untreated leaves. It was found that the coating on the leaves acted as a strong surface
ozone sink, which reduced
ozone concentrations in the leaf boundary layer and resulted in significantly reduced stomatal fluxes of
ozone. Measurements of drought stressed specimens displayed significant declines in photosynthesis and stomatal conductance, however isoprene emissions remained constant. This resulted in a significant increase in the percentage of assimilated carbon emitted as isoprene during times of water stress and represented a decoupling of photosynthesis from isoprene production. The level of circadian control over isoprene emissions was assessed for a Q. muehlenbergii specimen by exposing it to constant light for several days. No circadian control over isoprene emissions was noted for this specimen despite past research demonstrating circadian control over isoprene emissions for several other species.
Advisors/Committee Members: Schade, Gunnar W (advisor), Briske, David (committee member), Zhang, Renyi (committee member).
Subjects/Keywords: isoprene; oak; Quercus; ozone; drought
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Watson, M. R. (2016). Chamber Measurements of Trace Gas Exchanges for Several Oak Species Exposed to Ozone and Drought. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/159083
Chicago Manual of Style (16th Edition):
Watson, Matthew Raymond. “Chamber Measurements of Trace Gas Exchanges for Several Oak Species Exposed to Ozone and Drought.” 2016. Masters Thesis, Texas A&M University. Accessed April 18, 2021.
http://hdl.handle.net/1969.1/159083.
MLA Handbook (7th Edition):
Watson, Matthew Raymond. “Chamber Measurements of Trace Gas Exchanges for Several Oak Species Exposed to Ozone and Drought.” 2016. Web. 18 Apr 2021.
Vancouver:
Watson MR. Chamber Measurements of Trace Gas Exchanges for Several Oak Species Exposed to Ozone and Drought. [Internet] [Masters thesis]. Texas A&M University; 2016. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/1969.1/159083.
Council of Science Editors:
Watson MR. Chamber Measurements of Trace Gas Exchanges for Several Oak Species Exposed to Ozone and Drought. [Masters Thesis]. Texas A&M University; 2016. Available from: http://hdl.handle.net/1969.1/159083

University of North Texas
27.
Matin, Maleeha.
A study of the impact of unconventional sources within a large urban area: Evidence from spatio-temporal assessment of volatile organic compounds.
Degree: 2016, University of North Texas
URL: https://digital.library.unt.edu/ark:/67531/metadc849645/
► Conventional sources of emissions have been a prime target for policymakers in designing pollution control strategies. However, the evolution of shale gas activities is a…
(more)
▼ Conventional sources of emissions have been a prime target for policymakers in designing pollution control strategies. However, the evolution of shale gas activities is a growing concern over the impact of unconventional sources on urban and regional air quality. Owing to the development of Barnett Shale production, the fast-growing Dallas-Fort Worth (DFW) metroplex has encountered both types of these emissions. Oil and gas activities result in emissions of
ozone precursors, notably volatile organic compounds (VOC). The major objective of this study was to evaluate the spatio-temporal distribution of VOC in order to highlight the influence of unconventional emissions. The study utilized measurements from automated gas chromatography (AutoGC) monitors to analyze the patterns of the total non-methane organic compounds (TNMOC) and relative contributions from marker species of traffic versus oil and gas activities. In this study, data from 2001-2014 was obtained from the Texas Commission on Environmental Quality (TCEQ) for fifteen monitoring sites within the North Texas region. With over a thousand wells in a 10 mile radius, two of the rural sites measured twice as much TNMOC as compared to the urban site in Dallas. Source apportionment analysis was conducted using Positive Matrix Factorization (PMF) technique. The target site located in the urban zone resolved an eight factor model. Natural gas signature was the dominant source of emission with a 52% contribution followed by 31% from two separate traffic-related sources. Considering ethane to be the dominant species in oil and gas emissions, it was observed that the rising ethane/NOx ratio correlated with increasing annual average
ozone post-2007. In this period, higher concentration of
ozone was found to be associated with stronger winds from the Barnett Shale area – a region that did not seem to contribute to high
ozone during 2001-2007. With traffic emissions having flattened over the years, the recent increase in oil- and gas-related emissions has a negative impact on the air quality in this area. Results indicate that the area has failed to observe a declining trend in
ozone despite effective reductions in NOx and traffic-related VOC emissions. The findings of the study would be helpful in proper evaluation of the
ozone-forming potential of unconventional VOC emissions. Although these emissions may not be strong enough to cause harm through direct exposure, underestimating their potential towards
ozone formation could hinder the progress in
ozone attainment in growing urban areas. After all, a major portion of the study area continues to be in nonattainment of the EPA designated
ozone standards. The study therefore draws the attention of policymakers towards the new influx of emissions that have emerged as a powerful source within the DFW metropolitan area.
Advisors/Committee Members: John, Kuruvilla, Choi, Tae-Youl, Acevedo, Miguel F..
Subjects/Keywords: Barnett Shale; VOC; Ozone; DFW
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Penn State University
28.
Stauffer, Ryan Michael.
Linkages among U.S. Ozonesonde Profile Variability, Meteorology, and Surface Ozone Measurements based on Self-Organizing Map Clustering.
Degree: 2016, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/28646
► Ozone (O3) profiles have been measured with high accuracy and precision by balloon-borne ozonesonde instruments since the 1960s. Since then, global ozonesonde networks have amassed…
(more)
▼ Ozone (O3) profiles have been measured with high accuracy and precision by balloon-borne ozonesonde instruments since the 1960s. Since then, global ozonesonde networks have amassed vast data sets, compiling O3 climatologies with which to develop and validate satellite retrieval algorithms, and evaluate chemical transport model output. A typical way to formulate O3 climatologies is to average ozonesonde profiles on a monthly or seasonal basis, either for specific regions or zonally. Shortcomings of this simplistic averaging are quantified in this dissertation through use of a statistical clustering technique, self-organizing maps (SOM). First, the SOM algorithm and its application to ozonesonde profiles are detailed. Sensitivity tests comparing SOM with the similar k-means algorithm lead to the decision to employ SOM to ozonesonde data sets, and justified the choice of a 3x3 SOM with nine clusters. SOM is then applied to >4500 ozonesonde profiles from the long-term U.S. monitoring sites Boulder, CO; Huntsville, AL; Trinidad Head, CA; and Wallops Island, VA. The clusters of surface – 12 km amsl O3 mixing ratio data are closely linked to large-scale meteorological conditions. At all four sites, profiles in SOM clusters exhibit similar tropopause height, 500 hPa height and temperature, and total and tropospheric column O3. When profiles from each SOM cluster are compared to monthly O3 means, near-tropopause O3 in three of the clusters is double (over +100 ppbv) the climatological O3 mixing ratio. The three clusters include 13–16% of all profiles, mostly from winter and spring. Large mid-tropospheric deviations from monthly means (-6 ppbv, +7 – 10 ppbv O3 at 6 km) are found in two highly-populated clusters with a combined 36–39% of profiles. The latter clusters represent both distinctly polluted (summer) and clean O3 (fall-winter, high tropopause) profiles.
Finally, we explore the capability of SOM clusters to identify high surface O3 events. Clusters of O3 profile data over a narrowed altitude range (surface – 6 km amsl) from Trinidad Head, CA, are linked to surface O3 monitor data at inland locations in CA. SOM clusters of O3 profile data from the lower troposphere can discriminate background vs polluted O3 and the conditions linked with each. Two of nine O3 clusters exhibit thin layers (~100s of m thick) of high O3, typically between 1 and 4 km, and residing above a subsidence inversion associated with a northern location of the semi-permanent Pacific subtropical high.
Ozone in these clusters is upwind of high-altitude surface O3 monitors at inland locations. The surface O3 monitors at Lassen Volcanic and Yosemite National Parks, and Truckee, CA, display a marked impact of the elevated tropospheric O¬¬3. Days corresponding to the high O3 clusters exhibit hourly surface O3 anomalies at these sites of +5–10 ppbv compared to a climatology; the anomalies can last up to four days.
Advisors/Committee Members: Anne Mee Thompson, Dissertation Advisor/Co-Advisor, William Henry Brune, Committee Chair/Co-Chair, George Spencer Young, Committee Member, John Harlim, Committee Member.
Subjects/Keywords: Ozone; Radiosondes; Climatology; Meteorology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Stauffer, R. M. (2016). Linkages among U.S. Ozonesonde Profile Variability, Meteorology, and Surface Ozone Measurements based on Self-Organizing Map Clustering. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/28646
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):
Stauffer, Ryan Michael. “Linkages among U.S. Ozonesonde Profile Variability, Meteorology, and Surface Ozone Measurements based on Self-Organizing Map Clustering.” 2016. Thesis, Penn State University. Accessed April 18, 2021.
https://submit-etda.libraries.psu.edu/catalog/28646.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Stauffer, Ryan Michael. “Linkages among U.S. Ozonesonde Profile Variability, Meteorology, and Surface Ozone Measurements based on Self-Organizing Map Clustering.” 2016. Web. 18 Apr 2021.
Vancouver:
Stauffer RM. Linkages among U.S. Ozonesonde Profile Variability, Meteorology, and Surface Ozone Measurements based on Self-Organizing Map Clustering. [Internet] [Thesis]. Penn State University; 2016. [cited 2021 Apr 18].
Available from: https://submit-etda.libraries.psu.edu/catalog/28646.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Stauffer RM. Linkages among U.S. Ozonesonde Profile Variability, Meteorology, and Surface Ozone Measurements based on Self-Organizing Map Clustering. [Thesis]. Penn State University; 2016. Available from: https://submit-etda.libraries.psu.edu/catalog/28646
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of KwaZulu-Natal
29.
Mulumba, Jean-Pierre Mfuamba.
Tropospheric ozone climatology over equatorial and Southern Africa using climate change parameters.
Degree: 2016, University of KwaZulu-Natal
URL: http://hdl.handle.net/10413/14877
► Tropospheric ozone climatology over equatorial and southern Africa has been at the core of this study. SHADOZ (Southern Hemisphere ADditional OZonesondes) network data for the…
(more)
▼ Tropospheric
ozone climatology over equatorial and southern Africa has been at the core of this study. SHADOZ (Southern Hemisphere ADditional OZonesondes) network data for the period 1998-2013, from Irene (South Africa) and Nairobi (Kenya), and MOZAIC (Measurement of
OZone and water vapor by Airbus In service air Craft) programme data for the period 1998-2001 from Brazzaville (Congo) respectively have been used to investigate tropospheric
ozone characteristics with regard to climate change parameters. These locations, which represent three different African climate zones including tropical (Brazzaville), equatorial (Nairobi) and subtropical (Irene) are poorly documented with regard to the variation and distribution of tropospheric
ozone, although its levels over the region have been increasing since the last two decades of the twentieth century. With recent changes observed on climate parameters due to climate change, tropospheric
ozone distribution and variability over this region have been investigated. Climate parameters including air temperature and relative humidity and
ozone parameters such as partial pressure have been used to achieve the objective of this study. Results from tropospheric
ozone modeling at Irene, using long term ozonesonde data from SHADOZ network, confirm the seasonal patterns of
ozone, such as previously observed over southern Africa, with two maxima occurring in summer and spring respectively. However, increase on
ozone concentrations from 55 to 65.6 DU in spring and from 32 to 55 DU in summer has been noted, in comparison with previous short term studies undertaken at this location. In the Congo Basin tropospheric
ozone climatology investigated using short term aircraft data from MOZAIC programme collected at Brazzaville for the period 1998-2001 also presents two seasonal maxima occurring in August and February with 35.4 DU and 26.1 DU respectively. Over equatorial eastern Africa, which presents one of the most complex meteorogical system in the African continent, seasonal
ozone distribution has also been noted with two peaks (43.0 DU) and (46.8 DU) occurring in July and October respectively. Analysis of case studies using HYSPLIT_4 (Hybrid Single-Particle Lagrangian Integrated Trajectory version 4) model and NCEP/NCAR (National Centers for Environmental Prediction/National Center for Atmospheric Research) reanalysis model has shown that increase on tropospheric
ozone over these regions is determined by precursor from both local and long range transport based from remote sources (biomass burning, lightning and biogenic emissions). The role played by dynamic processes is defined by positive divergence values and negative flux on zonal and meridional wind patterns prevailing at upper troposphere due to a quasi-permanent low pressure system prevailing in the region which in turn implies the highest partial
ozone value observed in this region.
Advisors/Committee Members: Sivakumar, Venkataraman. (advisor), Afullo, Thomas Joachim Odhiambo. (advisor).
Subjects/Keywords: Tropospheric ozone.; Climatology.; Climate change.
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mulumba, J. M. (2016). Tropospheric ozone climatology over equatorial and Southern Africa using climate change parameters. (Thesis). University of KwaZulu-Natal. Retrieved from http://hdl.handle.net/10413/14877
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):
Mulumba, Jean-Pierre Mfuamba. “Tropospheric ozone climatology over equatorial and Southern Africa using climate change parameters.” 2016. Thesis, University of KwaZulu-Natal. Accessed April 18, 2021.
http://hdl.handle.net/10413/14877.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mulumba, Jean-Pierre Mfuamba. “Tropospheric ozone climatology over equatorial and Southern Africa using climate change parameters.” 2016. Web. 18 Apr 2021.
Vancouver:
Mulumba JM. Tropospheric ozone climatology over equatorial and Southern Africa using climate change parameters. [Internet] [Thesis]. University of KwaZulu-Natal; 2016. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/10413/14877.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mulumba JM. Tropospheric ozone climatology over equatorial and Southern Africa using climate change parameters. [Thesis]. University of KwaZulu-Natal; 2016. Available from: http://hdl.handle.net/10413/14877
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Oregon State University
30.
Pirlet, Andre Jean.
An investigation of the relation between total ozone and synoptic tropospheric disturbances.
Degree: MS, Atmospheric Sciences, 1987, Oregon State University
URL: http://hdl.handle.net/1957/31609
► It has been shown by Schlesinger and Mintz (1979) that the UCLA general circulation model (GCM) is able to simulate the observed negative correlation between…
(more)
▼ It has been shown by Schlesinger and Mintz (1979) that the UCLA general
circulation model (GCM) is able to simulate the observed negative correlation
between the total amount of
ozone in a vertical atmospheric column (the total
ozone)
and the eastward-propagating synoptic disturbances in the troposphere, with the
total
ozone maxima and minima located respectively at the troughs and ridges of the
tropospheric waves. The goal of the present study was to understand how the GCM
simulated this observed relationship.
Our analysis shows that the transient-eddy total
ozone disturbances were an
omnipresent feature of the GCM January simulation in the northern hemisphere
midlatitudes, just as they are in nature. It is also found that the transient-eddy total
ozone disturbances in the northern hemisphere midlatitudes were closely related to
the transient-eddy geopotential heights there throughout the entirety of the
simulation. Furthermore, the correlations between these two quantities are negative
up to the 72 mb level and attain their largest negative values at the 300 mb level.
The analysis also shows that the transient-eddy disturbances in the stratosphere are
out of phase with their counterparts in the troposphere, in accord with what would
be expected from Dines compensation.
In the GCM simulation there is a well-defined positive correlation between the
total
ozone and the
ozone content in each of the model layers in the upper troposphere
and lower and middle stratosphere. It is found that although layers 5-8 (19.3-150
mb) contain the largest percentage of the total
ozone, it is predominantly layers 6-9
(37.3 -300 mb) that make the largest contribution to the temporal variations of
total
ozone.
In accordance with the observations, a strong negative correlation is found
between the simulated total
ozone and the height of the simulated tropopause.
However, changing the height of the tropopause cannot in itself change the total
ozone, but rather only its partitioning between the stratosphere and the troposphere.
Our analysis clearly shows that it is the
ozone convergence and divergence in an
atmospheric column, not the photochemical
ozone production and destruction, which
are responsible for the synoptic increases and decreases of total
ozone.
Advisors/Committee Members: Schlesinger, Michael E. (advisor).
Subjects/Keywords: Ozone layer
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Pirlet, A. J. (1987). An investigation of the relation between total ozone and synoptic tropospheric disturbances. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/31609
Chicago Manual of Style (16th Edition):
Pirlet, Andre Jean. “An investigation of the relation between total ozone and synoptic tropospheric disturbances.” 1987. Masters Thesis, Oregon State University. Accessed April 18, 2021.
http://hdl.handle.net/1957/31609.
MLA Handbook (7th Edition):
Pirlet, Andre Jean. “An investigation of the relation between total ozone and synoptic tropospheric disturbances.” 1987. Web. 18 Apr 2021.
Vancouver:
Pirlet AJ. An investigation of the relation between total ozone and synoptic tropospheric disturbances. [Internet] [Masters thesis]. Oregon State University; 1987. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/1957/31609.
Council of Science Editors:
Pirlet AJ. An investigation of the relation between total ozone and synoptic tropospheric disturbances. [Masters Thesis]. Oregon State University; 1987. Available from: http://hdl.handle.net/1957/31609
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