Prognostic residual mean flow in an ocean general circulation model and its relation to prognostic Eulerian mean flow
Recent work has shown that taking the thickness-weighted average (TWA) of the Boussinesq equations in buoyancy coordinates results in exact equations governing the prognostic residual mean flow where eddy–mean flow interactions appear in the horizontal momentum equations as the divergence of the Eli...
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ftosti:oai:osti.gov:1227629 2023-07-30T04:07:03+02:00 Prognostic residual mean flow in an ocean general circulation model and its relation to prognostic Eulerian mean flow Saenz, Juan A. Chen, Qingshan Ringler, Todd 2021-07-19 application/pdf http://www.osti.gov/servlets/purl/1227629 https://www.osti.gov/biblio/1227629 https://doi.org/10.1175/JPO-D-15-0024.1 unknown http://www.osti.gov/servlets/purl/1227629 https://www.osti.gov/biblio/1227629 https://doi.org/10.1175/JPO-D-15-0024.1 doi:10.1175/JPO-D-15-0024.1 54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES 2021 ftosti https://doi.org/10.1175/JPO-D-15-0024.1 2023-07-11T09:04:07Z Recent work has shown that taking the thickness-weighted average (TWA) of the Boussinesq equations in buoyancy coordinates results in exact equations governing the prognostic residual mean flow where eddy–mean flow interactions appear in the horizontal momentum equations as the divergence of the Eliassen–Palm flux tensor (EPFT). It has been proposed that, given the mathematical tractability of the TWA equations, the physical interpretation of the EPFT, and its relation to potential vorticity fluxes, the TWA is an appropriate framework for modeling ocean circulation with parameterized eddies. The authors test the feasibility of this proposition and investigate the connections between the TWA framework and the conventional framework used in models, where Eulerian mean flow prognostic variables are solved for. Using the TWA framework as a starting point, this study explores the well-known connections between vertical transfer of horizontal momentum by eddy form drag and eddy overturning by the bolus velocity, used by Greatbatch and Lamb and Gent and McWilliams to parameterize eddies. After implementing the TWA framework in an ocean general circulation model, we verify our analysis by comparing the flows in an idealized Southern Ocean configuration simulated using the TWA and conventional frameworks with the same mesoscale eddy parameterization. Other/Unknown Material Southern Ocean SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Southern Ocean Journal of Physical Oceanography 45 9 2247 2260 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES |
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54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES Saenz, Juan A. Chen, Qingshan Ringler, Todd Prognostic residual mean flow in an ocean general circulation model and its relation to prognostic Eulerian mean flow |
topic_facet |
54 ENVIRONMENTAL SCIENCES 58 GEOSCIENCES |
description |
Recent work has shown that taking the thickness-weighted average (TWA) of the Boussinesq equations in buoyancy coordinates results in exact equations governing the prognostic residual mean flow where eddy–mean flow interactions appear in the horizontal momentum equations as the divergence of the Eliassen–Palm flux tensor (EPFT). It has been proposed that, given the mathematical tractability of the TWA equations, the physical interpretation of the EPFT, and its relation to potential vorticity fluxes, the TWA is an appropriate framework for modeling ocean circulation with parameterized eddies. The authors test the feasibility of this proposition and investigate the connections between the TWA framework and the conventional framework used in models, where Eulerian mean flow prognostic variables are solved for. Using the TWA framework as a starting point, this study explores the well-known connections between vertical transfer of horizontal momentum by eddy form drag and eddy overturning by the bolus velocity, used by Greatbatch and Lamb and Gent and McWilliams to parameterize eddies. After implementing the TWA framework in an ocean general circulation model, we verify our analysis by comparing the flows in an idealized Southern Ocean configuration simulated using the TWA and conventional frameworks with the same mesoscale eddy parameterization. |
author |
Saenz, Juan A. Chen, Qingshan Ringler, Todd |
author_facet |
Saenz, Juan A. Chen, Qingshan Ringler, Todd |
author_sort |
Saenz, Juan A. |
title |
Prognostic residual mean flow in an ocean general circulation model and its relation to prognostic Eulerian mean flow |
title_short |
Prognostic residual mean flow in an ocean general circulation model and its relation to prognostic Eulerian mean flow |
title_full |
Prognostic residual mean flow in an ocean general circulation model and its relation to prognostic Eulerian mean flow |
title_fullStr |
Prognostic residual mean flow in an ocean general circulation model and its relation to prognostic Eulerian mean flow |
title_full_unstemmed |
Prognostic residual mean flow in an ocean general circulation model and its relation to prognostic Eulerian mean flow |
title_sort |
prognostic residual mean flow in an ocean general circulation model and its relation to prognostic eulerian mean flow |
publishDate |
2021 |
url |
http://www.osti.gov/servlets/purl/1227629 https://www.osti.gov/biblio/1227629 https://doi.org/10.1175/JPO-D-15-0024.1 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
http://www.osti.gov/servlets/purl/1227629 https://www.osti.gov/biblio/1227629 https://doi.org/10.1175/JPO-D-15-0024.1 doi:10.1175/JPO-D-15-0024.1 |
op_doi |
https://doi.org/10.1175/JPO-D-15-0024.1 |
container_title |
Journal of Physical Oceanography |
container_volume |
45 |
container_issue |
9 |
container_start_page |
2247 |
op_container_end_page |
2260 |
_version_ |
1772820128178634752 |