Long-term temperature trends in the deep waters of the Weddell Sea
Warming of the deep water in the Weddell Sea has important implications for Antarctic bottom water formation, melting of pack ice, and the regional ocean–atmosphere heat transfer. In order to evaluate warming trends in the Weddell Sea, a historical data set encompassing CTD and bottle data from 1912...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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ftoceanrep:oai:oceanrep.geomar.de:6658 2023-05-15T14:04:44+02:00 Long-term temperature trends in the deep waters of the Weddell Sea Robertson, R. Visbeck, Martin Gordon, G. Fahrbach, E. 2002 text https://oceanrep.geomar.de/id/eprint/6658/ https://oceanrep.geomar.de/id/eprint/6658/1/1-s2.0-S0967064502001595-main.pdf https://doi.org/10.1016/S0967-0645(02)00159-5 en eng Elsevier https://oceanrep.geomar.de/id/eprint/6658/1/1-s2.0-S0967064502001595-main.pdf Robertson, R., Visbeck, M. , Gordon, G. and Fahrbach, E. (2002) Long-term temperature trends in the deep waters of the Weddell Sea. Deep Sea Research Part I: Oceanographic Research Papers, 49 (21). pp. 4791-4806. DOI 10.1016/S0967-0645(02)00159-5 <https://doi.org/10.1016/S0967-0645%2802%2900159-5>. doi:10.1016/S0967-0645(02)00159-5 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2002 ftoceanrep https://doi.org/10.1016/S0967-0645(02)00159-5 2023-04-07T14:53:24Z Warming of the deep water in the Weddell Sea has important implications for Antarctic bottom water formation, melting of pack ice, and the regional ocean–atmosphere heat transfer. In order to evaluate warming trends in the Weddell Sea, a historical data set encompassing CTD and bottle data from 1912 to 2000 was analyzed for temporal trends in the deep water masses: warm deep water (WDW) and Weddell Sea deep water (WSDW). The coldest WDW temperatures were primarily associated with the Weddell Polynya of the mid-1970s. Subsequent warming occurred at a rate of ∼0.012±0.007°C yr−1 from the 1970s to 1990s. This warming was comparable to the global, average surface water warming observed by Levitus et al. (Science 287 (2000) 2225), to the warming of the WSBW in the central Weddell Sea observed by Fahrbach et al. (Filchner–Ronne Ice Shelf Program, Report No. 12, Alfred-Wegener-Institut, Bremerhaven, Germany, 1998a, p. 24), and to the surface ice temperature warming from 1970 to 1998 in the Weddell Sea observed by Comiso (J. Climate 13 (2000) 1674). The warming was not compensated by an increase in salinity, and thus the WDW became less dense. The location of the warmest temperature was displaced towards the surface by ∼200 m from the 1970s to the 1990s. Although the average WSDW potential temperatures between 1500 and 3500 m were warmer in the 1990s than in the 1970s, high variability in the data prevented identification of a well-defined temporal trend Article in Journal/Newspaper Antarc* Antarctic Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf Weddell Sea OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) Weddell Weddell Sea Deep Sea Research Part II: Topical Studies in Oceanography 49 21 4791 4806 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Warming of the deep water in the Weddell Sea has important implications for Antarctic bottom water formation, melting of pack ice, and the regional ocean–atmosphere heat transfer. In order to evaluate warming trends in the Weddell Sea, a historical data set encompassing CTD and bottle data from 1912 to 2000 was analyzed for temporal trends in the deep water masses: warm deep water (WDW) and Weddell Sea deep water (WSDW). The coldest WDW temperatures were primarily associated with the Weddell Polynya of the mid-1970s. Subsequent warming occurred at a rate of ∼0.012±0.007°C yr−1 from the 1970s to 1990s. This warming was comparable to the global, average surface water warming observed by Levitus et al. (Science 287 (2000) 2225), to the warming of the WSBW in the central Weddell Sea observed by Fahrbach et al. (Filchner–Ronne Ice Shelf Program, Report No. 12, Alfred-Wegener-Institut, Bremerhaven, Germany, 1998a, p. 24), and to the surface ice temperature warming from 1970 to 1998 in the Weddell Sea observed by Comiso (J. Climate 13 (2000) 1674). The warming was not compensated by an increase in salinity, and thus the WDW became less dense. The location of the warmest temperature was displaced towards the surface by ∼200 m from the 1970s to the 1990s. Although the average WSDW potential temperatures between 1500 and 3500 m were warmer in the 1990s than in the 1970s, high variability in the data prevented identification of a well-defined temporal trend |
format |
Article in Journal/Newspaper |
author |
Robertson, R. Visbeck, Martin Gordon, G. Fahrbach, E. |
spellingShingle |
Robertson, R. Visbeck, Martin Gordon, G. Fahrbach, E. Long-term temperature trends in the deep waters of the Weddell Sea |
author_facet |
Robertson, R. Visbeck, Martin Gordon, G. Fahrbach, E. |
author_sort |
Robertson, R. |
title |
Long-term temperature trends in the deep waters of the Weddell Sea |
title_short |
Long-term temperature trends in the deep waters of the Weddell Sea |
title_full |
Long-term temperature trends in the deep waters of the Weddell Sea |
title_fullStr |
Long-term temperature trends in the deep waters of the Weddell Sea |
title_full_unstemmed |
Long-term temperature trends in the deep waters of the Weddell Sea |
title_sort |
long-term temperature trends in the deep waters of the weddell sea |
publisher |
Elsevier |
publishDate |
2002 |
url |
https://oceanrep.geomar.de/id/eprint/6658/ https://oceanrep.geomar.de/id/eprint/6658/1/1-s2.0-S0967064502001595-main.pdf https://doi.org/10.1016/S0967-0645(02)00159-5 |
long_lat |
ENVELOPE(-61.000,-61.000,-78.500,-78.500) |
geographic |
Antarctic Ronne Ice Shelf Weddell Weddell Sea |
geographic_facet |
Antarctic Ronne Ice Shelf Weddell Weddell Sea |
genre |
Antarc* Antarctic Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf Weddell Sea |
genre_facet |
Antarc* Antarctic Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf Weddell Sea |
op_relation |
https://oceanrep.geomar.de/id/eprint/6658/1/1-s2.0-S0967064502001595-main.pdf Robertson, R., Visbeck, M. , Gordon, G. and Fahrbach, E. (2002) Long-term temperature trends in the deep waters of the Weddell Sea. Deep Sea Research Part I: Oceanographic Research Papers, 49 (21). pp. 4791-4806. DOI 10.1016/S0967-0645(02)00159-5 <https://doi.org/10.1016/S0967-0645%2802%2900159-5>. doi:10.1016/S0967-0645(02)00159-5 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/S0967-0645(02)00159-5 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
49 |
container_issue |
21 |
container_start_page |
4791 |
op_container_end_page |
4806 |
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1766276003619930112 |