subject:(eddy advection)

Texas A&M University

1. Li, Pin. Quantifying the Contribution of Mean Flow and Eddy Advection to the Warm SST Bias in the Southeast Tropical Atlantic Region.

Degree: PhD, Oceanography, 2018, Texas A&M University

URL: http://hdl.handle.net/1969.1/174045

► In current-generation climate models, the warm sea surface temperature (SST) bias problem is most commonly seen in the eastern boundary upwelling systems (EBUSs), and is… (more)

▼ In current-generation climate models, the warm sea surface temperature (SST) bias problem is most commonly seen in the eastern boundary upwelling systems (EBUSs), and is most pronounced and most prevalent in the Southeast Tropical Atlantic (SETA) region. Previous studies have shown that the coastal wind pattern in this region, namely the Benguela low-level coastal jet (BLLCJ), is of great importance for the generation of such SST bias, because the coastal ocean circulation is highly sensitive to the off-shore structure of the wind forcing. Using an eddy-resolving regional ocean model, we first show that the SST bias in the region is drastically reduced when forced with simulated winds from a high-resolution regional atmospheric model. We subsequently demonstrate that the SST bias is highly sensitive to the spatial structure of the wind stress curl (WSC). We also find that when the ocean model is forced by a realistic high-resolution wind, the ocean model resolution is of second order importance in reducing the SST bias. Furthermore, we use a double-time average (DTA) method to quantify the contribution of heat budget terms, and show that the horizontal advection contributes significantly to the SST bias. We then examined the question: To what extent do ocean eddies play a role in balancing the coastal ocean heat budget and affecting the SST bias? By experimenting with a submesoscale eddy-permitting regional ocean model, we show that ocean eddies in the Southeast Tropical Atlantic region are most energetic near the Angola-Benguela Front (ABF), the Lüderitz Upwelling Cell region and the Agulhas Leakage region. In these three regions, comparisons between the two model simulations forced with the low- vs high-resolution winds suggest that the SST bias is mainly generated by mean flow advection with ocean eddies playing the role of counteracting the warming induced by the mean flow advection in this region. Advisors/Committee Members: Chang, Ping (advisor), Lin, Xiaopei (committee member), Hetland, Robert (committee member), Stössel, Achim (committee member), Saravanan, Ramalingam (committee member).

Subjects/Keywords: Climate model; SST bias; southeast tropical Atlantic; Benguela low-level coastal jet; Angola Current; Benguela Current; upwelling; eddy advection

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APA (6^th Edition):

Li, P. (2018). Quantifying the Contribution of Mean Flow and Eddy Advection to the Warm SST Bias in the Southeast Tropical Atlantic Region. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/174045

Chicago Manual of Style (16^th Edition):

Li, Pin. “Quantifying the Contribution of Mean Flow and Eddy Advection to the Warm SST Bias in the Southeast Tropical Atlantic Region.” 2018. Doctoral Dissertation, Texas A&M University. Accessed January 18, 2021. http://hdl.handle.net/1969.1/174045.

MLA Handbook (7^th Edition):

Li, Pin. “Quantifying the Contribution of Mean Flow and Eddy Advection to the Warm SST Bias in the Southeast Tropical Atlantic Region.” 2018. Web. 18 Jan 2021.

Vancouver:

Li P. Quantifying the Contribution of Mean Flow and Eddy Advection to the Warm SST Bias in the Southeast Tropical Atlantic Region. [Internet] [Doctoral dissertation]. Texas A&M University; 2018. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/1969.1/174045.

Council of Science Editors:

Li P. Quantifying the Contribution of Mean Flow and Eddy Advection to the Warm SST Bias in the Southeast Tropical Atlantic Region. [Doctoral Dissertation]. Texas A&M University; 2018. Available from: http://hdl.handle.net/1969.1/174045

2. Rey Sanchez, Andres Camilo. Measurements of Evaporation and Carbon Dioxide Fluxes over a Coastal Reef using the Eddy-Covariance Technique.

Degree: MS, Civil Engineering, 2018, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1528905399809107

► Eddy covariance measurements of evaporation and carbon dioxide flux in coastal systems are an important tool to understand ecological and biophysical properties of ecosystems such… (more)

▼ Eddy covariance measurements of evaporation and carbon dioxide flux in coastal systems are an important tool to understand ecological and biophysical properties of ecosystems such as coastal reefs. However, few studies have examined mass fluxes under highly contrasting air-sea temperature conditions, such as those found in the Red Sea or any other desert-surrounded seas and coastal areas. This study analyses season-long observations of evaporation and carbon flux at the Gulf of Aqaba coast, northern Red Sea. Data were collected using the eddy-covariance method with a two-tower setup to measure evaporation rates over land and sea and the advection between them. Using a 3D mass balance approach, total evaporation was calculated as the sum of two main components in our site: horizontal advection and turbulent vertical flux, with half-hourly change of water vapor storage and horizontal flux divergence found to be negligible. Average evaporation rates were 11.4 [mm day-1] from April through May (early summer), and 10.5 [mm day-1] from June through August (summer). These rates of evaporation near the shore were considerably higher than values reported in other studies typically used to represent the mean for the whole Gulf area. The results of this study show that evaporation rates computed by common bulk models approximate the mean values of evaporation but have poor representativeness of the intra-daily temporal variation of evaporation. The coastal reef was a CO2 sink over the period of measurements, significantly higher in June through August than in April through May. The main environmental drivers of CO2 flux were humidity, water temperature, sensible heat flux and wind speed. There was a significant correlation between CO2 flux and evaporation attributed to common environmental drivers of gas diffusion, turbulent fluxes, and horizontal transport. Measurements of mass fluxes in coastal waters need to use at least a two-tower system to account for the effect of horizontal advection on the total flux. Advisors/Committee Members: Bohrer, Gil (Advisor).

Subjects/Keywords: Environmental Engineering; Meteorology; Evaporation; Eddy covariance; Advection; Coral reefs

…temperate lake: An eddy covariance approach. Ecological Engineering. Pre-press, published online… …Genin A (2018). Evaporation and CO2 fluxes in a coastal reef: Comparing eddy… …Combining eddy-covariance and chamber measurements to determine the methane budget from a small… …2 1.2. Measurements of evaporation with the eddy-covariance technique… …15 2.3.3. Eddy-covariance data filtering and footprint model…

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APA (6^th Edition):

Rey Sanchez, A. C. (2018). Measurements of Evaporation and Carbon Dioxide Fluxes over a Coastal Reef using the Eddy-Covariance Technique. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1528905399809107

Chicago Manual of Style (16^th Edition):

Rey Sanchez, Andres Camilo. “Measurements of Evaporation and Carbon Dioxide Fluxes over a Coastal Reef using the Eddy-Covariance Technique.” 2018. Masters Thesis, The Ohio State University. Accessed January 18, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1528905399809107.

MLA Handbook (7^th Edition):

Rey Sanchez, Andres Camilo. “Measurements of Evaporation and Carbon Dioxide Fluxes over a Coastal Reef using the Eddy-Covariance Technique.” 2018. Web. 18 Jan 2021.

Vancouver:

Rey Sanchez AC. Measurements of Evaporation and Carbon Dioxide Fluxes over a Coastal Reef using the Eddy-Covariance Technique. [Internet] [Masters thesis]. The Ohio State University; 2018. [cited 2021 Jan 18]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1528905399809107.

Council of Science Editors:

Rey Sanchez AC. Measurements of Evaporation and Carbon Dioxide Fluxes over a Coastal Reef using the Eddy-Covariance Technique. [Masters Thesis]. The Ohio State University; 2018. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1528905399809107

3. Shlomo, Dekel. Eddy flux observations of evaporation and vapor advection in the Gulf of Aqaba (Eilat), Red Sea.

Degree: MS, Civil Engineering, 2011, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1316471975

► There is a large uncertainty around the rates of evaporation from desert enclosed seas, and in particular the Red Sea. The Gulf of Aqaba is… (more)

▼ There is a large uncertainty around the rates of evaporation from desert enclosed seas, and in particular the Red Sea. The Gulf of Aqaba is long and narrow and is partially isolated from the Red Sea and the Indian Ocean by shallow and narrow straits. The long fringing reef of the Red Sea has a large economic importance to the region's tourism. In the northern part of the Red Sea, vertical mixing of the water column, which is driven by evaporation, supplies nutrients to the shallow water and, at high levels, results in favorable conditions for algae over corals, and thus, will lead to the destruction of corals. The local weather and sea surface temperature are also affected by the rates of evaporation. There are two compounding phenomena that complicate the estimation of evaporation rate in this region: (1) Although the wind is mostly oriented along the long axis of the narrow Gulf, advection of water vapor towards the dry desert surrounding the Red Sea may account for large amounts of water. (2) In the summer, the mean sea surface temperature is colder than the warm, dry desert air, leading to a thin stable boundary layer above the sea that may suppress evaporation. Atmospheric and oceanic models of the Red Sea area have run into difficulties in estimating the evaporation rates. There are very few locations where the temperature and humidity are measured routinely. Direct measurements of evaporation or on-shore advection of water vapor were not previously conducted in this region. In March 2009 we set up two eddy flux towers at the Inter-University Institute for Marine Science in Eilat, Israel, at the north western shore of the Gulf of Aqaba. We conducted measurements of water vapor wind and other meteorological conditions. We used the eddy-covariance technique to calculate the mass balance of water in the atmosphere above the coral lagoon near the shore. Our measurements show that a combination of advection toward land and stability conditions of the boundary layer due to negative water-air temperature gradient in hot days significantly affects the evaporation rates. Advisors/Committee Members: Bohrer, Gil (Advisor).

Subjects/Keywords: Environmental Engineering; Oceanography; Vapor advection; Evaporation in the Red Sea; Eddy flux in the Red Sea

…11 Figure 5. Eddy flux towers located at the IUI… …54 Figure 22. Mean daily dynamics of advection… …67 Figure 31. Mean daily dynamics of carbon advection… …caused by a stable boundary layer above the relatively cold water. Advection of vapor to the… …land may offset this effect. Advection is defined as a movement along a concentration…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Shlomo, D. (2011). Eddy flux observations of evaporation and vapor advection in the Gulf of Aqaba (Eilat), Red Sea. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1316471975

Chicago Manual of Style (16^th Edition):

Shlomo, Dekel. “Eddy flux observations of evaporation and vapor advection in the Gulf of Aqaba (Eilat), Red Sea.” 2011. Masters Thesis, The Ohio State University. Accessed January 18, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1316471975.

MLA Handbook (7^th Edition):

Shlomo, Dekel. “Eddy flux observations of evaporation and vapor advection in the Gulf of Aqaba (Eilat), Red Sea.” 2011. Web. 18 Jan 2021.

Vancouver:

Shlomo D. Eddy flux observations of evaporation and vapor advection in the Gulf of Aqaba (Eilat), Red Sea. [Internet] [Masters thesis]. The Ohio State University; 2011. [cited 2021 Jan 18]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1316471975.

Council of Science Editors:

Shlomo D. Eddy flux observations of evaporation and vapor advection in the Gulf of Aqaba (Eilat), Red Sea. [Masters Thesis]. The Ohio State University; 2011. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1316471975

4. de Araujo, A.C. Spatial variation of CO2 fluxes and lateral transport in an area of terra firme forest in Central Amazonia.

Degree: 2009, NARCIS

URL: https://research.vu.nl/en/publications/ed640b07-6ea7-45ae-8935-520c12abadef ; urn:nbn:nl:ui:31-1871/13330 ; ed640b07-6ea7-45ae-8935-520c12abadef ; 1871/13330 ; urn:nbn:nl:ui:31-1871/13330 ; https://research.vu.nl/en/publications/ed640b07-6ea7-45ae-8935-520c12abadef

Subjects/Keywords: advection; carbon balance; complex terrain; ecosystem respiration; eddy covariance; friction velocity; nighttime conditions; nocturnal inversion; tropical forest

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

de Araujo, A. C. (2009). Spatial variation of CO2 fluxes and lateral transport in an area of terra firme forest in Central Amazonia. (Doctoral Dissertation). NARCIS. Retrieved from https://research.vu.nl/en/publications/ed640b07-6ea7-45ae-8935-520c12abadef ; urn:nbn:nl:ui:31-1871/13330 ; ed640b07-6ea7-45ae-8935-520c12abadef ; 1871/13330 ; urn:nbn:nl:ui:31-1871/13330 ; https://research.vu.nl/en/publications/ed640b07-6ea7-45ae-8935-520c12abadef

Chicago Manual of Style (16^th Edition):

de Araujo, A C. “Spatial variation of CO2 fluxes and lateral transport in an area of terra firme forest in Central Amazonia.” 2009. Doctoral Dissertation, NARCIS. Accessed January 18, 2021. https://research.vu.nl/en/publications/ed640b07-6ea7-45ae-8935-520c12abadef ; urn:nbn:nl:ui:31-1871/13330 ; ed640b07-6ea7-45ae-8935-520c12abadef ; 1871/13330 ; urn:nbn:nl:ui:31-1871/13330 ; https://research.vu.nl/en/publications/ed640b07-6ea7-45ae-8935-520c12abadef.

MLA Handbook (7^th Edition):

de Araujo, A C. “Spatial variation of CO2 fluxes and lateral transport in an area of terra firme forest in Central Amazonia.” 2009. Web. 18 Jan 2021.

Vancouver:

de Araujo AC. Spatial variation of CO2 fluxes and lateral transport in an area of terra firme forest in Central Amazonia. [Internet] [Doctoral dissertation]. NARCIS; 2009. [cited 2021 Jan 18]. Available from: https://research.vu.nl/en/publications/ed640b07-6ea7-45ae-8935-520c12abadef ; urn:nbn:nl:ui:31-1871/13330 ; ed640b07-6ea7-45ae-8935-520c12abadef ; 1871/13330 ; urn:nbn:nl:ui:31-1871/13330 ; https://research.vu.nl/en/publications/ed640b07-6ea7-45ae-8935-520c12abadef.

Council of Science Editors:

de Araujo AC. Spatial variation of CO2 fluxes and lateral transport in an area of terra firme forest in Central Amazonia. [Doctoral Dissertation]. NARCIS; 2009. Available from: https://research.vu.nl/en/publications/ed640b07-6ea7-45ae-8935-520c12abadef ; urn:nbn:nl:ui:31-1871/13330 ; ed640b07-6ea7-45ae-8935-520c12abadef ; 1871/13330 ; urn:nbn:nl:ui:31-1871/13330 ; https://research.vu.nl/en/publications/ed640b07-6ea7-45ae-8935-520c12abadef

Vrije Universiteit Amsterdam

5. Araujo, A.C. de. Spatial variation of CO2 fluxes and lateral transport in an area of terra firme forest in Central Amazonia .

Degree: 2009, Vrije Universiteit Amsterdam

URL: http://hdl.handle.net/1871/13330

Subjects/Keywords: Spatial variation of CO2 fluxes and lateral transport in an area of terra firme forest in Central Amazonia; carbon balance; advection; nocturnal inversion; ecosystem respiration; complex terrain; nighttime conditions; tropical forest; eddy covariance; friction velocity

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Araujo, A. C. d. (2009). Spatial variation of CO2 fluxes and lateral transport in an area of terra firme forest in Central Amazonia . (Doctoral Dissertation). Vrije Universiteit Amsterdam. Retrieved from http://hdl.handle.net/1871/13330

Chicago Manual of Style (16^th Edition):

Araujo, A C de. “Spatial variation of CO2 fluxes and lateral transport in an area of terra firme forest in Central Amazonia .” 2009. Doctoral Dissertation, Vrije Universiteit Amsterdam. Accessed January 18, 2021. http://hdl.handle.net/1871/13330.

MLA Handbook (7^th Edition):

Araujo, A C de. “Spatial variation of CO2 fluxes and lateral transport in an area of terra firme forest in Central Amazonia .” 2009. Web. 18 Jan 2021.

Vancouver:

Araujo ACd. Spatial variation of CO2 fluxes and lateral transport in an area of terra firme forest in Central Amazonia . [Internet] [Doctoral dissertation]. Vrije Universiteit Amsterdam; 2009. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/1871/13330.

Council of Science Editors:

Araujo ACd. Spatial variation of CO2 fluxes and lateral transport in an area of terra firme forest in Central Amazonia . [Doctoral Dissertation]. Vrije Universiteit Amsterdam; 2009. Available from: http://hdl.handle.net/1871/13330

University of Toronto

6. Ivan, Lucian. Development of High-order CENO Finite-volume Schemes with Block-based Adaptive Mesh Refinement (AMR).

Degree: 2011, University of Toronto

URL: http://hdl.handle.net/1807/29759

►

A high-order central essentially non-oscillatory (CENO) finite-volume scheme in combination with a block-based adaptive mesh refinement (AMR) algorithm is proposed for solution of hyperbolic and… (more)

▼

A high-order central essentially non-oscillatory (CENO) finite-volume scheme in combination with a block-based adaptive mesh refinement (AMR) algorithm is proposed for solution of hyperbolic and elliptic systems of conservation laws on body- fitted multi-block mesh. The spatial discretization of the hyperbolic (inviscid) terms is based on a hybrid solution reconstruction procedure that combines an unlimited high-order k-exact least-squares reconstruction technique following from a fixed central stencil with a monotonicity preserving limited piecewise linear reconstruction algorithm. The limited reconstruction is applied to computational cells with under-resolved solution content and the unlimited k-exact reconstruction procedure is used for cells in which the solution is fully resolved. Switching in the hybrid procedure is determined by a solution smoothness indicator. The hybrid approach avoids the complexity associated with other ENO schemes that require reconstruction on multiple stencils and therefore, would seem very well suited for extension to unstructured meshes. The high-order elliptic (viscous) fluxes are computed based on a k-order accurate average gradient derived from a (k+1)-order accurate reconstruction. A novel h-refinement criterion based on the solution smoothness indicator is used to direct the steady and unsteady refinement of the AMR mesh. The predictive capabilities of the proposed high-order AMR scheme are demonstrated for the Euler and Navier-Stokes equations governing two-dimensional compressible gaseous flows as well as for advection-diffusion problems characterized by the full range of Peclet numbers, Pe. The ability of the scheme to accurately represent solutions with smooth extrema and yet robustly handle under-resolved and/or non-smooth solution content (i.e., shocks and other discontinuities) is shown for a range of problems. Moreover, the ability to perform mesh refinement in regions of smooth but under-resolved and/or non-smooth solution content to achieve the desired resolution is also demonstrated.

PhD

Advisors/Committee Members: Groth, Clinton P. T., Aerospace Science and Engineering.

Subjects/Keywords: computational fluid dynamics; finite-volume method; high-order scheme; adaptive mesh refinement (AMR); ENO scheme; essentially non-oscillatory; CENO; body-fitted multi-block mesh; high-order spatial discretization; numerical method; hyperbolic and elliptic PDE; fixed stencil reconstruction; piecewise linear reconstruction; smoothness indicator; Euler and Navier-Stokes equations; advection-diffusion equation; smooth and non-smooth solution content; k-exact least-squares reconstruction; hybrid numerical scheme; compressible gaseous flows; refinement criteria; high-performance parallel computing; solution monotonicity enforcement; large-eddy simulation (LES); interpolation technique; structured grid; inviscid and viscous flow; TVD scheme; h-p-adaptation; high-order boundary conditions; complex curved geometries; 0538

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ivan, L. (2011). Development of High-order CENO Finite-volume Schemes with Block-based Adaptive Mesh Refinement (AMR). (Doctoral Dissertation). University of Toronto. Retrieved from http://hdl.handle.net/1807/29759

Chicago Manual of Style (16^th Edition):

Ivan, Lucian. “Development of High-order CENO Finite-volume Schemes with Block-based Adaptive Mesh Refinement (AMR).” 2011. Doctoral Dissertation, University of Toronto. Accessed January 18, 2021. http://hdl.handle.net/1807/29759.

MLA Handbook (7^th Edition):

Ivan, Lucian. “Development of High-order CENO Finite-volume Schemes with Block-based Adaptive Mesh Refinement (AMR).” 2011. Web. 18 Jan 2021.

Vancouver:

Ivan L. Development of High-order CENO Finite-volume Schemes with Block-based Adaptive Mesh Refinement (AMR). [Internet] [Doctoral dissertation]. University of Toronto; 2011. [cited 2021 Jan 18]. Available from: http://hdl.handle.net/1807/29759.

Council of Science Editors:

Ivan L. Development of High-order CENO Finite-volume Schemes with Block-based Adaptive Mesh Refinement (AMR). [Doctoral Dissertation]. University of Toronto; 2011. Available from: http://hdl.handle.net/1807/29759

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