Reduced sea ice production due to upwelled oceanic heat flux in Prydz Bay, East Antarctica
The coastal shelf region of East Antarctica is hypothesized to be shielded from the offshore heat of Circumpolar Deep Water (CDW) due to the dynamic barrier of the Antarctic Slope Front. Yet modified CDW (mCDW) intrudes into the coastal environment in key locations, with impacts on dense shelf water...
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Online Access: | https://doi.org/10.1029/2018GL081463 http://ecite.utas.edu.au/139600 |
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ftunivtasecite:oai:ecite.utas.edu.au:139600 2023-05-15T13:42:40+02:00 Reduced sea ice production due to upwelled oceanic heat flux in Prydz Bay, East Antarctica Guo, G Shi, J Gao, L Tamura, T Williams, GD 2019 application/pdf https://doi.org/10.1029/2018GL081463 http://ecite.utas.edu.au/139600 en eng Amer Geophysical Union http://ecite.utas.edu.au/139600/1/139600 - Reduced sea ice production due to upwelled oceanic heat flux.pdf http://dx.doi.org/10.1029/2018GL081463 Guo, G and Shi, J and Gao, L and Tamura, T and Williams, GD, Reduced sea ice production due to upwelled oceanic heat flux in Prydz Bay, East Antarctica, Geophysical Research Letters, 46, (9) pp. 4782-4789. ISSN 0094-8276 (2019) [Refereed Article] http://ecite.utas.edu.au/139600 Earth Sciences Oceanography Physical oceanography Refereed Article PeerReviewed 2019 ftunivtasecite https://doi.org/10.1029/2018GL081463 2022-08-29T22:17:57Z The coastal shelf region of East Antarctica is hypothesized to be shielded from the offshore heat of Circumpolar Deep Water (CDW) due to the dynamic barrier of the Antarctic Slope Front. Yet modified CDW (mCDW) intrudes into the coastal environment in key locations, with impacts on dense shelf water formation and ocean/ice shelf interaction that remain largely unquantified. Using moored measurements and conductivity‐temperature‐depth‐instrumented seal hydrographic data collected in Prydz Bay, East Antarctica, we find buoyancy‐driven upwelling of mCDW into the subsurface (~50 m) layer of the southeastern embayment. Wintertime convection extends as deep as 300 m, entraining heat of the upwelled mCDW to the surface. Accumulated sensible heat supply to the surface through deep convection during JuneJuly reduces the potential sea ice production by 45% in the Davis Polynya, demonstrating that stronger/warmer mCDW intrusions onto the shelf will likely reduce the shelf water density and threaten Antarctic Bottom Water formation. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Shelf Prydz Bay Sea ice eCite UTAS (University of Tasmania) Antarctic East Antarctica Prydz Bay The Antarctic Geophysical Research Letters 46 9 4782 4789 |
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Open Polar |
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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 Guo, G Shi, J Gao, L Tamura, T Williams, GD Reduced sea ice production due to upwelled oceanic heat flux in Prydz Bay, East Antarctica |
topic_facet |
Earth Sciences Oceanography Physical oceanography |
description |
The coastal shelf region of East Antarctica is hypothesized to be shielded from the offshore heat of Circumpolar Deep Water (CDW) due to the dynamic barrier of the Antarctic Slope Front. Yet modified CDW (mCDW) intrudes into the coastal environment in key locations, with impacts on dense shelf water formation and ocean/ice shelf interaction that remain largely unquantified. Using moored measurements and conductivity‐temperature‐depth‐instrumented seal hydrographic data collected in Prydz Bay, East Antarctica, we find buoyancy‐driven upwelling of mCDW into the subsurface (~50 m) layer of the southeastern embayment. Wintertime convection extends as deep as 300 m, entraining heat of the upwelled mCDW to the surface. Accumulated sensible heat supply to the surface through deep convection during JuneJuly reduces the potential sea ice production by 45% in the Davis Polynya, demonstrating that stronger/warmer mCDW intrusions onto the shelf will likely reduce the shelf water density and threaten Antarctic Bottom Water formation. |
format |
Article in Journal/Newspaper |
author |
Guo, G Shi, J Gao, L Tamura, T Williams, GD |
author_facet |
Guo, G Shi, J Gao, L Tamura, T Williams, GD |
author_sort |
Guo, G |
title |
Reduced sea ice production due to upwelled oceanic heat flux in Prydz Bay, East Antarctica |
title_short |
Reduced sea ice production due to upwelled oceanic heat flux in Prydz Bay, East Antarctica |
title_full |
Reduced sea ice production due to upwelled oceanic heat flux in Prydz Bay, East Antarctica |
title_fullStr |
Reduced sea ice production due to upwelled oceanic heat flux in Prydz Bay, East Antarctica |
title_full_unstemmed |
Reduced sea ice production due to upwelled oceanic heat flux in Prydz Bay, East Antarctica |
title_sort |
reduced sea ice production due to upwelled oceanic heat flux in prydz bay, east antarctica |
publisher |
Amer Geophysical Union |
publishDate |
2019 |
url |
https://doi.org/10.1029/2018GL081463 http://ecite.utas.edu.au/139600 |
geographic |
Antarctic East Antarctica Prydz Bay The Antarctic |
geographic_facet |
Antarctic East Antarctica Prydz Bay The Antarctic |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Shelf Prydz Bay Sea ice |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Shelf Prydz Bay Sea ice |
op_relation |
http://ecite.utas.edu.au/139600/1/139600 - Reduced sea ice production due to upwelled oceanic heat flux.pdf http://dx.doi.org/10.1029/2018GL081463 Guo, G and Shi, J and Gao, L and Tamura, T and Williams, GD, Reduced sea ice production due to upwelled oceanic heat flux in Prydz Bay, East Antarctica, Geophysical Research Letters, 46, (9) pp. 4782-4789. ISSN 0094-8276 (2019) [Refereed Article] http://ecite.utas.edu.au/139600 |
op_doi |
https://doi.org/10.1029/2018GL081463 |
container_title |
Geophysical Research Letters |
container_volume |
46 |
container_issue |
9 |
container_start_page |
4782 |
op_container_end_page |
4789 |
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1766171144431337472 |