On the freshening of the northwestern Weddell Sea continental shelf
12 páginas, 10 figuras, 2 tablas. We analyzed hydrographic data from the northwestern Weddell Sea continental shelf of the three austral winters 1989, 1997, and 2006 and two summers following the last winter cruise. During summer a thermal front exists at ~64° S separating cold southern waters from...
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Format: | Article in Journal/Newspaper |
Language: | English |
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European Geosciences Union
2011
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Online Access: | http://hdl.handle.net/10261/46950 https://doi.org/10.5194/os-7-305-2011 |
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ftcsic:oai:digital.csic.es:10261/46950 2024-02-11T09:57:22+01:00 On the freshening of the northwestern Weddell Sea continental shelf Hellmer, Hartmut H. Huhn, Oliver Gomis, Damià Timmermann, Ralph 2011-05-06 http://hdl.handle.net/10261/46950 https://doi.org/10.5194/os-7-305-2011 en eng European Geosciences Union http://dx.doi.org/10.5194/os-7-305-2011 Ocean Science 7(3): 305-316 (2011) 1812-0784 http://hdl.handle.net/10261/46950 doi:10.5194/os-7-305-2011 1812-0792 open artículo http://purl.org/coar/resource_type/c_6501 2011 ftcsic https://doi.org/10.5194/os-7-305-2011 2024-01-16T09:36:38Z 12 páginas, 10 figuras, 2 tablas. We analyzed hydrographic data from the northwestern Weddell Sea continental shelf of the three austral winters 1989, 1997, and 2006 and two summers following the last winter cruise. During summer a thermal front exists at ~64° S separating cold southern waters from warm northern waters that have similar characteristics as the deep waters of the central basin of the Bransfield Strait. In winter, the whole continental shelf exhibits southern characteristics with high Neon (Ne) concentrations, indicating a significant input of glacial melt water. The comparison of the winter data from the shallow shelf off the tip of the Antarctic Peninsula, spanning a period of 17 yr, shows a salinity decrease of 0.09 for the whole water column, which has a residence time of <1 yr. We interpret this freshening as being caused by a combination of reduced salt input due to a southward sea ice retreat and higher precipitation during the late 20th century on the western Weddell Sea continental shelf. However, less salinification might also result from a delicate interplay between enhanced salt input due to sea ice formation in coastal areas formerly occupied by Larsen A and B ice shelves and increased Larsen C ice loss. Una parte de la financiación de esta investigación se debe a los proyectos ATOS (POL2006-00550/CTM) y ESASSI (POL2006-11139-C02-01/CGL), subvencionados por el Subprograma de Investigación Polar del Ministerio de Ciencia e Innovación y el por el Fondo Europeo de Desarrollo Regional de la Unión Europea. Peer reviewed Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Bransfield Strait Ice Shelves Sea ice Weddell Sea Digital.CSIC (Spanish National Research Council) Antarctic Antarctic Peninsula Austral Bransfield Strait Central Basin ENVELOPE(178.000,178.000,-72.300,-72.300) The Antarctic Weddell Weddell Sea Ocean Science 7 3 305 316 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
description |
12 páginas, 10 figuras, 2 tablas. We analyzed hydrographic data from the northwestern Weddell Sea continental shelf of the three austral winters 1989, 1997, and 2006 and two summers following the last winter cruise. During summer a thermal front exists at ~64° S separating cold southern waters from warm northern waters that have similar characteristics as the deep waters of the central basin of the Bransfield Strait. In winter, the whole continental shelf exhibits southern characteristics with high Neon (Ne) concentrations, indicating a significant input of glacial melt water. The comparison of the winter data from the shallow shelf off the tip of the Antarctic Peninsula, spanning a period of 17 yr, shows a salinity decrease of 0.09 for the whole water column, which has a residence time of <1 yr. We interpret this freshening as being caused by a combination of reduced salt input due to a southward sea ice retreat and higher precipitation during the late 20th century on the western Weddell Sea continental shelf. However, less salinification might also result from a delicate interplay between enhanced salt input due to sea ice formation in coastal areas formerly occupied by Larsen A and B ice shelves and increased Larsen C ice loss. Una parte de la financiación de esta investigación se debe a los proyectos ATOS (POL2006-00550/CTM) y ESASSI (POL2006-11139-C02-01/CGL), subvencionados por el Subprograma de Investigación Polar del Ministerio de Ciencia e Innovación y el por el Fondo Europeo de Desarrollo Regional de la Unión Europea. Peer reviewed |
format |
Article in Journal/Newspaper |
author |
Hellmer, Hartmut H. Huhn, Oliver Gomis, Damià Timmermann, Ralph |
spellingShingle |
Hellmer, Hartmut H. Huhn, Oliver Gomis, Damià Timmermann, Ralph On the freshening of the northwestern Weddell Sea continental shelf |
author_facet |
Hellmer, Hartmut H. Huhn, Oliver Gomis, Damià Timmermann, Ralph |
author_sort |
Hellmer, Hartmut H. |
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 |
publisher |
European Geosciences Union |
publishDate |
2011 |
url |
http://hdl.handle.net/10261/46950 https://doi.org/10.5194/os-7-305-2011 |
long_lat |
ENVELOPE(178.000,178.000,-72.300,-72.300) |
geographic |
Antarctic Antarctic Peninsula Austral Bransfield Strait Central Basin The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Antarctic Peninsula Austral Bransfield Strait Central Basin The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctic Peninsula Bransfield Strait Ice Shelves Sea ice Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Bransfield Strait Ice Shelves Sea ice Weddell Sea |
op_relation |
http://dx.doi.org/10.5194/os-7-305-2011 Ocean Science 7(3): 305-316 (2011) 1812-0784 http://hdl.handle.net/10261/46950 doi:10.5194/os-7-305-2011 1812-0792 |
op_rights |
open |
op_doi |
https://doi.org/10.5194/os-7-305-2011 |
container_title |
Ocean Science |
container_volume |
7 |
container_issue |
3 |
container_start_page |
305 |
op_container_end_page |
316 |
_version_ |
1790609666503344128 |