Radiation and Dissipation of Internal Waves Generated by Geostrophic Motions Impinging on Small-Scale Topography: Application to the Southern Ocean
Recent estimates from observations and inverse models indicate that turbulent mixing associated with internal wave breaking is enhanced above rough topography in the Southern Ocean. In most regions of the ocean, abyssal mixing has been primarily associated with radiation and breaking of internal tid...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.222.1011 2023-05-15T16:02:32+02:00 Radiation and Dissipation of Internal Waves Generated by Geostrophic Motions Impinging on Small-Scale Topography: Application to the Southern Ocean Maxim Nikurashin Raffaele Ferrari The Pennsylvania State University CiteSeerX Archives 2009 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.222.1011 http://www.gfdl.noaa.gov/cms-filesystem-action/user_files/m1n/2010JPO4315.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.222.1011 http://www.gfdl.noaa.gov/cms-filesystem-action/user_files/m1n/2010JPO4315.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.gfdl.noaa.gov/cms-filesystem-action/user_files/m1n/2010JPO4315.pdf text 2009 ftciteseerx 2016-01-07T18:21:43Z Recent estimates from observations and inverse models indicate that turbulent mixing associated with internal wave breaking is enhanced above rough topography in the Southern Ocean. In most regions of the ocean, abyssal mixing has been primarily associated with radiation and breaking of internal tides. In this study, it is shown that abyssal mixing in the Southern Ocean can be sustained by internal waves generated by geostrophic motions that dominate abyssal flows in this region. Theory and fully nonlinear numerical simulations are used to estimate the internal wave radiation and dissipation from lowered acoustic Doppler current profiler (LADCP), CTD, and topography data from two regions in the Southern Ocean: Drake Passage and the southeast Pacific. The results show that radiation and dissipation of internal waves generated by geostrophic motions reproduce the magnitude and distribution of dissipation previously inferred from finescale measurements in the region, suggesting that it is one of the primary drivers of abyssal mixing in the Southern Ocean. 1. Text Drake Passage Southern Ocean Unknown Drake Passage Pacific Southern Ocean |
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English |
description |
Recent estimates from observations and inverse models indicate that turbulent mixing associated with internal wave breaking is enhanced above rough topography in the Southern Ocean. In most regions of the ocean, abyssal mixing has been primarily associated with radiation and breaking of internal tides. In this study, it is shown that abyssal mixing in the Southern Ocean can be sustained by internal waves generated by geostrophic motions that dominate abyssal flows in this region. Theory and fully nonlinear numerical simulations are used to estimate the internal wave radiation and dissipation from lowered acoustic Doppler current profiler (LADCP), CTD, and topography data from two regions in the Southern Ocean: Drake Passage and the southeast Pacific. The results show that radiation and dissipation of internal waves generated by geostrophic motions reproduce the magnitude and distribution of dissipation previously inferred from finescale measurements in the region, suggesting that it is one of the primary drivers of abyssal mixing in the Southern Ocean. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Maxim Nikurashin Raffaele Ferrari |
spellingShingle |
Maxim Nikurashin Raffaele Ferrari Radiation and Dissipation of Internal Waves Generated by Geostrophic Motions Impinging on Small-Scale Topography: Application to the Southern Ocean |
author_facet |
Maxim Nikurashin Raffaele Ferrari |
author_sort |
Maxim Nikurashin |
title |
Radiation and Dissipation of Internal Waves Generated by Geostrophic Motions Impinging on Small-Scale Topography: Application to the Southern Ocean |
title_short |
Radiation and Dissipation of Internal Waves Generated by Geostrophic Motions Impinging on Small-Scale Topography: Application to the Southern Ocean |
title_full |
Radiation and Dissipation of Internal Waves Generated by Geostrophic Motions Impinging on Small-Scale Topography: Application to the Southern Ocean |
title_fullStr |
Radiation and Dissipation of Internal Waves Generated by Geostrophic Motions Impinging on Small-Scale Topography: Application to the Southern Ocean |
title_full_unstemmed |
Radiation and Dissipation of Internal Waves Generated by Geostrophic Motions Impinging on Small-Scale Topography: Application to the Southern Ocean |
title_sort |
radiation and dissipation of internal waves generated by geostrophic motions impinging on small-scale topography: application to the southern ocean |
publishDate |
2009 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.222.1011 http://www.gfdl.noaa.gov/cms-filesystem-action/user_files/m1n/2010JPO4315.pdf |
geographic |
Drake Passage Pacific Southern Ocean |
geographic_facet |
Drake Passage Pacific Southern Ocean |
genre |
Drake Passage Southern Ocean |
genre_facet |
Drake Passage Southern Ocean |
op_source |
http://www.gfdl.noaa.gov/cms-filesystem-action/user_files/m1n/2010JPO4315.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.222.1011 http://www.gfdl.noaa.gov/cms-filesystem-action/user_files/m1n/2010JPO4315.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766398196287799296 |