Thermal structure of the coastal polynya off Syowa Station, Antarctica
Open water areas between fast-ice and pack-ice zones are frequently observed off Lutzow-Holm Bay, Antarctica. In such open waters, called polynyas or leads, which are exposed to the cold air, new sea ice can form with a high growth rate. So the open polynya releases large quantities of heat to the a...
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National Institute of Polar Research
1993
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fttriple:oai:gotriple.eu:oai:doaj.org/article:9ad63a8aa5c74e428afb89601e285cbe 2023-05-15T13:43:22+02:00 Thermal structure of the coastal polynya off Syowa Station, Antarctica Shuki Ushio Takatoshi Takizawa Kay I. Ohshima Toshiyuki Kawamura 1993-11-01 https://doi.org/10.15094/00008820 https://doaj.org/article/9ad63a8aa5c74e428afb89601e285cbe en other eng National Institute of Polar Research doi:10.15094/00008820 0085-7289 2432-079X https://doaj.org/article/9ad63a8aa5c74e428afb89601e285cbe undefined Antarctic Record, Vol 37, Iss 3, Pp 252-259 (1993) geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 1993 fttriple https://doi.org/10.15094/00008820 2023-01-22T19:07:16Z Open water areas between fast-ice and pack-ice zones are frequently observed off Lutzow-Holm Bay, Antarctica. In such open waters, called polynyas or leads, which are exposed to the cold air, new sea ice can form with a high growth rate. So the open polynya releases large quantities of heat to the atmosphere and excludes high-salinity brine to the ocean. In 1990-1992 the 31st and 32nd Japanese Antarctic Research Expeditions conducted oceanographic observations in Lutzow-Holm Bay to reveal the atmosphere-sea ice-ocean interaction. Thirty AXBT's (aircraft-deployed expendable bathythermograph) were cast to examine the thermal structure in the polynya "Otone Suiro". Based on the AXBT data the depths of the winter convective-mixed layer were estimated. The thickness of the mixed layer near the freezing point (-1.9∿-1.8℃) reached to 350∿450m. These mixed layers were clearly thick as compared with those in the offshore pack-ice region. Furthermore the mixed layer has a tendency to deepen in winter. Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice Unknown Antarctic Syowa Station |
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Open Polar |
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English |
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geo |
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geo Shuki Ushio Takatoshi Takizawa Kay I. Ohshima Toshiyuki Kawamura Thermal structure of the coastal polynya off Syowa Station, Antarctica |
topic_facet |
geo |
description |
Open water areas between fast-ice and pack-ice zones are frequently observed off Lutzow-Holm Bay, Antarctica. In such open waters, called polynyas or leads, which are exposed to the cold air, new sea ice can form with a high growth rate. So the open polynya releases large quantities of heat to the atmosphere and excludes high-salinity brine to the ocean. In 1990-1992 the 31st and 32nd Japanese Antarctic Research Expeditions conducted oceanographic observations in Lutzow-Holm Bay to reveal the atmosphere-sea ice-ocean interaction. Thirty AXBT's (aircraft-deployed expendable bathythermograph) were cast to examine the thermal structure in the polynya "Otone Suiro". Based on the AXBT data the depths of the winter convective-mixed layer were estimated. The thickness of the mixed layer near the freezing point (-1.9∿-1.8℃) reached to 350∿450m. These mixed layers were clearly thick as compared with those in the offshore pack-ice region. Furthermore the mixed layer has a tendency to deepen in winter. |
format |
Article in Journal/Newspaper |
author |
Shuki Ushio Takatoshi Takizawa Kay I. Ohshima Toshiyuki Kawamura |
author_facet |
Shuki Ushio Takatoshi Takizawa Kay I. Ohshima Toshiyuki Kawamura |
author_sort |
Shuki Ushio |
title |
Thermal structure of the coastal polynya off Syowa Station, Antarctica |
title_short |
Thermal structure of the coastal polynya off Syowa Station, Antarctica |
title_full |
Thermal structure of the coastal polynya off Syowa Station, Antarctica |
title_fullStr |
Thermal structure of the coastal polynya off Syowa Station, Antarctica |
title_full_unstemmed |
Thermal structure of the coastal polynya off Syowa Station, Antarctica |
title_sort |
thermal structure of the coastal polynya off syowa station, antarctica |
publisher |
National Institute of Polar Research |
publishDate |
1993 |
url |
https://doi.org/10.15094/00008820 https://doaj.org/article/9ad63a8aa5c74e428afb89601e285cbe |
geographic |
Antarctic Syowa Station |
geographic_facet |
Antarctic Syowa Station |
genre |
Antarc* Antarctic Antarctica Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Sea ice |
op_source |
Antarctic Record, Vol 37, Iss 3, Pp 252-259 (1993) |
op_relation |
doi:10.15094/00008820 0085-7289 2432-079X https://doaj.org/article/9ad63a8aa5c74e428afb89601e285cbe |
op_rights |
undefined |
op_doi |
https://doi.org/10.15094/00008820 |
_version_ |
1766188129797013504 |