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Formation of Antarctic bottom water in the Weddell Sea

1971; American Geophysical Union; Volume: 76; Issue: 9 Linguagem: Inglês

10.1029/jc076i009p02164

2156-2202

James M. Seabrooke, Gary L. Hufford, Robert B. Elder,

Marine and coastal ecosystems

Journal of Geophysical Research (1896-1977)Volume 76, Issue 9 p. 2164-2178 Formation of Antarctic bottom water in the Weddell Sea James M. Seabrooke, James M. SeabrookeSearch for more papers by this authorGary L. Hufford, Gary L. HuffordSearch for more papers by this authorRobert B. Elder, Robert B. ElderSearch for more papers by this author James M. Seabrooke, James M. SeabrookeSearch for more papers by this authorGary L. Hufford, Gary L. HuffordSearch for more papers by this authorRobert B. Elder, Robert B. ElderSearch for more papers by this author First published: 20 March 1971 https://doi.org/10.1029/JC076i009p02164Citations: 56AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Abstract During the austral summers of 1968 and 1969, the USCGC Glacier penetrated the pack ice of the Weddell Sea to over 75°S in support of the International Weddell Sea Oceanographic Expedition (IWSOE). A total of 83 hydrographic stations were conducted during the two expeditions for analysis of temperature, salinity, dissolved oxygen, and nutrients. The data revealed a cold (−1.9°C) saline (>34.60‰) layer of water on the continental shelf below a depth of 200 meters in the southwestern Weddell Sea. We hypothesize that this water mass is formed by alteration of coastal current water as it flows along and beneath the vast ice shelves in the southern Weddell Sea. The altered coastal current water then mixes with warm deep water (>0.2°C, >34.67‰) along the continental slope in approximately 1∶2 to form antarctic bottom water (−0.4°C, 34.66‰). The mixing ratio is confirmed by using core values of preformed phosphate and preformed nitrate concentrations as conservative properties. Antarctic bottom water then flows out of the Weddell Sea between 50° and 15°W longitudes and 60° and 65°S latitudes. Bottom water (−0.26°C, 34.66‰) flows into the Weddell Sea from the east near the Coats Land coast and is entrained into the antarctic bottom water flowing out. Citing Literature Volume76, Issue9Oceans and Atmospheres20 March 1971Pages 2164-2178 RelatedInformation