globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo1738
论文题名:
Antarctic Bottom Water production by intense sea-ice formation in the Cape Darnley polynya
作者: Ohshima K.I.; Fukamachi Y.; Williams G.D.; Nihashi S.; Roquet F.; Kitade Y.; Tamura T.; Hirano D.; Herraiz-Borreguero L.; Field I.; Hindell M.; Aoki S.; Wakatsuchi M.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2013
卷: 6, 期:3
起始页码: 235
结束页码: 240
语种: 英语
Scopus关键词: bottom water ; global ocean ; hydrography ; ice shelf ; mooring system ; pinniped ; sea ice ; transformation ; water mass ; Antarctica ; Mirounga ; Mirounga leonina
英文摘要: The formation of Antarctic Bottom Water-the cold, dense water that occupies the abyssal layer of the global ocean-is a key process in global ocean circulation. This water mass is formed as dense shelf water sinks to depth. Three regions around Antarctica where this process takes place have been previously documented. The presence of another source has been identified in hydrographic and tracer data, although the site of formation is not well constrained. Here we document the formation of dense shelf water in the Cape Darnley polynya (65°-69°E) and its subsequent transformation into bottom water using data from moorings and instrumented elephant seals (Mirounga leonina). Unlike the previously identified sources of Antarctic Bottom Water, which require the presence of an ice shelf or a large storage volume, bottom water production at the Cape Darnley polynya is driven primarily by the flux of salt released by sea-ice formation. We estimate that about 0.3-0.7 × 106 m3 s-1 of dense shelf water produced by the Cape Darnley polynya is transformed into Antarctic Bottom Water. The transformation of this water mass, which we term Cape Darnley Bottom Water, accounts for 6-13% of the circumpolar total. Copyright © 2013 Macmillan Publishers Limited.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106852
Appears in Collections:气候减缓与适应
科学计划与规划

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作者单位: Institute of Low Temperature Science, Hokkaido University, Sapporo 060-0819, Japan; Antarctic Climate and Ecosystem Cooperative Research Centre, University of Tasmania, Hobart 7001, TAS, Australia; Tomakomai National College of Technology, Tomakomai 059-1275, Japan; Department of Meteorology, Stockholm University, S-106 91 Stockholm, Sweden; Tokyo University of Marine Science and Technology, Tokyo 108-8477, Japan; National Institute of Polar Research, Tachikawa 190-8518, Japan; Graduate School of the Environment, Macquarie University, Australia; Institute for Marine and Antarctic Studies, University of Tasmania, Tasmania, TAS 7001, Australia

Recommended Citation:
Ohshima K.I.,Fukamachi Y.,Williams G.D.,et al. Antarctic Bottom Water production by intense sea-ice formation in the Cape Darnley polynya[J]. Nature Geoscience,2013-01-01,6(3)
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