On the freshening of the northwestern Weddell Sea continental shelf
For the last five decades the Antarctic Peninsula faces the strongest atmospheric warming on Earth with severe consequences for its glaciers, ice shelves, sea ice cover, and the surrounding marginal seas. We analyzed hydrographic data from the northwestern Weddell Sea continental shelf of three aust...
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ftawi:oai:epic.awi.de:23117 2023-05-15T13:46:50+02:00 On the freshening of the northwestern Weddell Sea continental shelf Hellmer, Hartmut Huhn, O. Timmermann, Ralph Schröder, Michael 2010 https://epic.awi.de/id/eprint/23117/ https://hdl.handle.net/10013/epic.35898 unknown Hellmer, H. orcid:0000-0002-9357-9853 , Huhn, O. , Timmermann, R. and Schröder, M. (2010) On the freshening of the northwestern Weddell Sea continental shelf , 24. Internationale Polartagung, 6.-10. September 2010, Obergurgl, Oesterreich. . hdl:10013/epic.35898 EPIC324. Internationale Polartagung, 6.-10. September 2010, Obergurgl, Oesterreich. Conference notRev 2010 ftawi 2021-12-24T15:34:31Z For the last five decades the Antarctic Peninsula faces the strongest atmospheric warming on Earth with severe consequences for its glaciers, ice shelves, sea ice cover, and the surrounding marginal seas. We analyzed hydrographic data from the northwestern Weddell Sea continental shelf of three austral winters (1989, 1997, and 2006) and two summers following the last winter cruise. The whole water column north of 66S freshened by ~0.1 between the winters of the 17-year period, replaced by deep waters of the Central Bransfield Strait Basin every summer. The discussion of the causes for the salinity decrease, supported by tracer analysis, favors the increased input of glacial melt from underneath Larsen C Ice Shelf. However, the 2-m/yr melt rate, necessary for a year-by-year freshening, could be reduced to 0.38 - 1.33 m/yr due to a recent (modeled) increase of precipitation and a retreat of the sea ice cover in the northwestern Weddell Sea. Conference Object Antarc* Antarctic Antarctic Peninsula Bransfield Strait Ice Shelf Ice Shelves Sea ice Weddell Sea Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Antarctic Peninsula Austral Bransfield Strait The Antarctic Weddell Weddell Sea |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
For the last five decades the Antarctic Peninsula faces the strongest atmospheric warming on Earth with severe consequences for its glaciers, ice shelves, sea ice cover, and the surrounding marginal seas. We analyzed hydrographic data from the northwestern Weddell Sea continental shelf of three austral winters (1989, 1997, and 2006) and two summers following the last winter cruise. The whole water column north of 66S freshened by ~0.1 between the winters of the 17-year period, replaced by deep waters of the Central Bransfield Strait Basin every summer. The discussion of the causes for the salinity decrease, supported by tracer analysis, favors the increased input of glacial melt from underneath Larsen C Ice Shelf. However, the 2-m/yr melt rate, necessary for a year-by-year freshening, could be reduced to 0.38 - 1.33 m/yr due to a recent (modeled) increase of precipitation and a retreat of the sea ice cover in the northwestern Weddell Sea. |
format |
Conference Object |
author |
Hellmer, Hartmut Huhn, O. Timmermann, Ralph Schröder, Michael |
spellingShingle |
Hellmer, Hartmut Huhn, O. Timmermann, Ralph Schröder, Michael On the freshening of the northwestern Weddell Sea continental shelf |
author_facet |
Hellmer, Hartmut Huhn, O. Timmermann, Ralph Schröder, Michael |
author_sort |
Hellmer, Hartmut |
title |
On the freshening of the northwestern Weddell Sea continental shelf |
title_short |
On the freshening of the northwestern Weddell Sea continental shelf |
title_full |
On the freshening of the northwestern Weddell Sea continental shelf |
title_fullStr |
On the freshening of the northwestern Weddell Sea continental shelf |
title_full_unstemmed |
On the freshening of the northwestern Weddell Sea continental shelf |
title_sort |
on the freshening of the northwestern weddell sea continental shelf |
publishDate |
2010 |
url |
https://epic.awi.de/id/eprint/23117/ https://hdl.handle.net/10013/epic.35898 |
geographic |
Antarctic Antarctic Peninsula Austral Bransfield Strait The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Antarctic Peninsula Austral Bransfield Strait The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctic Peninsula Bransfield Strait Ice Shelf Ice Shelves Sea ice Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Bransfield Strait Ice Shelf Ice Shelves Sea ice Weddell Sea |
op_source |
EPIC324. Internationale Polartagung, 6.-10. September 2010, Obergurgl, Oesterreich. |
op_relation |
Hellmer, H. orcid:0000-0002-9357-9853 , Huhn, O. , Timmermann, R. and Schröder, M. (2010) On the freshening of the northwestern Weddell Sea continental shelf , 24. Internationale Polartagung, 6.-10. September 2010, Obergurgl, Oesterreich. . hdl:10013/epic.35898 |
_version_ |
1766245310522195968 |