Internal lee wave closures : parameter sensitivity and comparison to observations
Author Posting. © American Geophysical Union, 2015. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 120 (2015): 7997–8019, doi:10.1002/2015JC010892. This...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/7831 2023-05-15T18:25:12+02:00 Internal lee wave closures : parameter sensitivity and comparison to observations Trossman, David S. Waterman, Stephanie N. Polzin, Kurt L. Arbic, Brian K. Garner, Stephen T. Naveira Garabato, Alberto C. Sheen, Katy L. 2015-12-17 https://hdl.handle.net/1912/7831 en_US eng John Wiley & Sons https://doi.org/10.1002/2015JC010892 Journal of Geophysical Research: Oceans 120 (2015): 7997–8019 https://hdl.handle.net/1912/7831 doi:10.1002/2015JC010892 Journal of Geophysical Research: Oceans 120 (2015): 7997–8019 doi:10.1002/2015JC010892 Mixing Dissipation Finestructure Internal waves Topographic interactions Microstructure Article 2015 ftwhoas https://doi.org/10.1002/2015JC010892 2022-05-28T22:59:32Z Author Posting. © American Geophysical Union, 2015. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 120 (2015): 7997–8019, doi:10.1002/2015JC010892. This paper examines two internal lee wave closures that have been used together with ocean models to predict the time-averaged global energy conversion rate into lee waves and dissipation rate associated with lee waves and topographic blocking: the Garner (2005) scheme and the Bell (1975) theory. The closure predictions in two Southern Ocean regions where geostrophic flows dominate over tides are examined and compared to microstructure profiler observations of the turbulent kinetic energy dissipation rate, where the latter are assumed to reflect the dissipation associated with topographic blocking and generated lee wave energy. It is shown that when applied to these Southern Ocean regions, the two closures differ most in their treatment of topographic blocking. For several reasons, pointwise validation of the closures is not possible using existing observations, but horizontally averaged comparisons between closure predictions and observations are made. When anisotropy of the underlying topography is accounted for, the two horizontally averaged closure predictions near the seafloor are approximately equal. The dissipation associated with topographic blocking is predicted by the Garner (2005) scheme to account for the majority of the depth-integrated dissipation over the bottom 1000 m of the water column, where the horizontally averaged predictions lie well within the spatial variability of the horizontally averaged observations. Simplifications made by the Garner (2005) scheme that are inappropriate for the oceanic context, together with imperfect observational information, can partially account for the prediction-observation disagreement, particularly in the upper water column. National Science Foundation Grant ... Article in Journal/Newspaper Southern Ocean Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Southern Ocean Journal of Geophysical Research: Oceans 120 12 7997 8019 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Mixing Dissipation Finestructure Internal waves Topographic interactions Microstructure |
spellingShingle |
Mixing Dissipation Finestructure Internal waves Topographic interactions Microstructure Trossman, David S. Waterman, Stephanie N. Polzin, Kurt L. Arbic, Brian K. Garner, Stephen T. Naveira Garabato, Alberto C. Sheen, Katy L. Internal lee wave closures : parameter sensitivity and comparison to observations |
topic_facet |
Mixing Dissipation Finestructure Internal waves Topographic interactions Microstructure |
description |
Author Posting. © American Geophysical Union, 2015. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Oceans 120 (2015): 7997–8019, doi:10.1002/2015JC010892. This paper examines two internal lee wave closures that have been used together with ocean models to predict the time-averaged global energy conversion rate into lee waves and dissipation rate associated with lee waves and topographic blocking: the Garner (2005) scheme and the Bell (1975) theory. The closure predictions in two Southern Ocean regions where geostrophic flows dominate over tides are examined and compared to microstructure profiler observations of the turbulent kinetic energy dissipation rate, where the latter are assumed to reflect the dissipation associated with topographic blocking and generated lee wave energy. It is shown that when applied to these Southern Ocean regions, the two closures differ most in their treatment of topographic blocking. For several reasons, pointwise validation of the closures is not possible using existing observations, but horizontally averaged comparisons between closure predictions and observations are made. When anisotropy of the underlying topography is accounted for, the two horizontally averaged closure predictions near the seafloor are approximately equal. The dissipation associated with topographic blocking is predicted by the Garner (2005) scheme to account for the majority of the depth-integrated dissipation over the bottom 1000 m of the water column, where the horizontally averaged predictions lie well within the spatial variability of the horizontally averaged observations. Simplifications made by the Garner (2005) scheme that are inappropriate for the oceanic context, together with imperfect observational information, can partially account for the prediction-observation disagreement, particularly in the upper water column. National Science Foundation Grant ... |
format |
Article in Journal/Newspaper |
author |
Trossman, David S. Waterman, Stephanie N. Polzin, Kurt L. Arbic, Brian K. Garner, Stephen T. Naveira Garabato, Alberto C. Sheen, Katy L. |
author_facet |
Trossman, David S. Waterman, Stephanie N. Polzin, Kurt L. Arbic, Brian K. Garner, Stephen T. Naveira Garabato, Alberto C. Sheen, Katy L. |
author_sort |
Trossman, David S. |
title |
Internal lee wave closures : parameter sensitivity and comparison to observations |
title_short |
Internal lee wave closures : parameter sensitivity and comparison to observations |
title_full |
Internal lee wave closures : parameter sensitivity and comparison to observations |
title_fullStr |
Internal lee wave closures : parameter sensitivity and comparison to observations |
title_full_unstemmed |
Internal lee wave closures : parameter sensitivity and comparison to observations |
title_sort |
internal lee wave closures : parameter sensitivity and comparison to observations |
publisher |
John Wiley & Sons |
publishDate |
2015 |
url |
https://hdl.handle.net/1912/7831 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Journal of Geophysical Research: Oceans 120 (2015): 7997–8019 doi:10.1002/2015JC010892 |
op_relation |
https://doi.org/10.1002/2015JC010892 Journal of Geophysical Research: Oceans 120 (2015): 7997–8019 https://hdl.handle.net/1912/7831 doi:10.1002/2015JC010892 |
op_doi |
https://doi.org/10.1002/2015JC010892 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
120 |
container_issue |
12 |
container_start_page |
7997 |
op_container_end_page |
8019 |
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1766206472350334976 |