Landfast ice controls on turbulence in Antarctic coastal seas
Knowledge of the ocean surface layer beneath Antarctic landfast ice is sparse. In this article surface layer turbulent and fine structure are quantified with and without landfast ice at the same West Antarctic Peninsula location. Landfast ice reduced turbulence levels locally to an order of magnitud...
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Online Access: | https://doi.org/10.1029/2021JC017963 http://ecite.utas.edu.au/148274 |
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ftunivtasecite:oai:ecite.utas.edu.au:148274 2023-05-15T13:42:40+02:00 Landfast ice controls on turbulence in Antarctic coastal seas Inall, ME Brearley, JA Henley, SF Fraser, AD Reed, S 2022 application/pdf https://doi.org/10.1029/2021JC017963 http://ecite.utas.edu.au/148274 en eng Wiley-Blackwell Publishing Inc. http://ecite.utas.edu.au/148274/2/148274 - Landfast ice controls on turbulence in Antarctic coastal seas.pdf http://dx.doi.org/10.1029/2021JC017963 Inall, ME and Brearley, JA and Henley, SF and Fraser, AD and Reed, S, Landfast ice controls on turbulence in Antarctic coastal seas, Journal of Geophysical Research: Oceans, 127, (1) Article e2021JC017963. ISSN 2169-9275 (2022) [Refereed Article] http://ecite.utas.edu.au/148274 Earth Sciences Oceanography Physical oceanography Refereed Article PeerReviewed 2022 ftunivtasecite https://doi.org/10.1029/2021JC017963 2022-10-17T22:16:47Z Knowledge of the ocean surface layer beneath Antarctic landfast ice is sparse. In this article surface layer turbulent and fine structure are quantified with and without landfast ice at the same West Antarctic Peninsula location. Landfast ice reduced turbulence levels locally to an order of magnitude less than ice-free values, and near-inertial energy and sub-inertial tidal energy levels to less than half their ice-free values. Vertical turbulent heat and nutrient fluxes were, respectively, 6 and 10 times greater than previously estimated. Under-ice tidal energy dissipation over the entire Antarctic continental shelf due to seasonal landfast ice cover is estimated to be between 788 MW to ∼6 GW. The total rate of wind-generated turbulence in the surface ocean is greatly reduced by the presence of seasonal landfast ice to an average of 14% of the ice-free value, but with large sectoral variations. Counter-intuitively, however, tides and wind contribute approximately equally to the turbulent kinetic energy budget of the upper ocean between the Antarctic coastline and the maximal landfast ice extent, with large sectoral variations, attributed to geographic variations in the strength of the barotropic tide. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula eCite UTAS (University of Tasmania) Antarctic The Antarctic Antarctic Peninsula Journal of Geophysical Research: Oceans |
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eCite UTAS (University of Tasmania) |
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ftunivtasecite |
language |
English |
topic |
Earth Sciences Oceanography Physical oceanography |
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Earth Sciences Oceanography Physical oceanography Inall, ME Brearley, JA Henley, SF Fraser, AD Reed, S Landfast ice controls on turbulence in Antarctic coastal seas |
topic_facet |
Earth Sciences Oceanography Physical oceanography |
description |
Knowledge of the ocean surface layer beneath Antarctic landfast ice is sparse. In this article surface layer turbulent and fine structure are quantified with and without landfast ice at the same West Antarctic Peninsula location. Landfast ice reduced turbulence levels locally to an order of magnitude less than ice-free values, and near-inertial energy and sub-inertial tidal energy levels to less than half their ice-free values. Vertical turbulent heat and nutrient fluxes were, respectively, 6 and 10 times greater than previously estimated. Under-ice tidal energy dissipation over the entire Antarctic continental shelf due to seasonal landfast ice cover is estimated to be between 788 MW to ∼6 GW. The total rate of wind-generated turbulence in the surface ocean is greatly reduced by the presence of seasonal landfast ice to an average of 14% of the ice-free value, but with large sectoral variations. Counter-intuitively, however, tides and wind contribute approximately equally to the turbulent kinetic energy budget of the upper ocean between the Antarctic coastline and the maximal landfast ice extent, with large sectoral variations, attributed to geographic variations in the strength of the barotropic tide. |
format |
Article in Journal/Newspaper |
author |
Inall, ME Brearley, JA Henley, SF Fraser, AD Reed, S |
author_facet |
Inall, ME Brearley, JA Henley, SF Fraser, AD Reed, S |
author_sort |
Inall, ME |
title |
Landfast ice controls on turbulence in Antarctic coastal seas |
title_short |
Landfast ice controls on turbulence in Antarctic coastal seas |
title_full |
Landfast ice controls on turbulence in Antarctic coastal seas |
title_fullStr |
Landfast ice controls on turbulence in Antarctic coastal seas |
title_full_unstemmed |
Landfast ice controls on turbulence in Antarctic coastal seas |
title_sort |
landfast ice controls on turbulence in antarctic coastal seas |
publisher |
Wiley-Blackwell Publishing Inc. |
publishDate |
2022 |
url |
https://doi.org/10.1029/2021JC017963 http://ecite.utas.edu.au/148274 |
geographic |
Antarctic The Antarctic Antarctic Peninsula |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula |
genre |
Antarc* Antarctic Antarctic Peninsula |
genre_facet |
Antarc* Antarctic Antarctic Peninsula |
op_relation |
http://ecite.utas.edu.au/148274/2/148274 - Landfast ice controls on turbulence in Antarctic coastal seas.pdf http://dx.doi.org/10.1029/2021JC017963 Inall, ME and Brearley, JA and Henley, SF and Fraser, AD and Reed, S, Landfast ice controls on turbulence in Antarctic coastal seas, Journal of Geophysical Research: Oceans, 127, (1) Article e2021JC017963. ISSN 2169-9275 (2022) [Refereed Article] http://ecite.utas.edu.au/148274 |
op_doi |
https://doi.org/10.1029/2021JC017963 |
container_title |
Journal of Geophysical Research: Oceans |
_version_ |
1766171417619988480 |