DOI: 10.1002/2013GL058125
论文题名: Modified shelf water on the continental slope north of Mac Robertson Land, East Antarctica
作者: Wong A.P.S. ; Riser S.C.
刊名: Geophysical Research Letters
ISSN: 0094-8294
EISSN: 1944-8025
出版年: 2013
卷: 40, 期: 23 起始页码: 6186
结束页码: 6190
语种: 英语
英文关键词: Antarctic continental slope
; Cape Darnley
; dense shelf water
; ice-avoidance algorithm
; profiling floats
; winter sea ice
Scopus关键词: Cape Darnley
; Continental slope
; Dense shelf water
; Profiling float
; Winter sea ices
; Sea ice
; Stream flow
; algorithm
; continental shelf
; continental slope
; oxygen minimum layer
; polynya
; potential temperature
; sea ice
; water mass
; Antarctica
; East Antarctica
英文摘要: We report on under-ice profiling float observations of cold, dense, and oxygenated bottom layers on the continental slope of Mac Robertson Land (60°-72°E) in East Antarctica. This bottom layer water mass, with potential temperature in the range -1.8°C < θ < -0.4°C, is identified as modified shelf water. It is a downslope variety of dense water formed on the Antarctic continental shelf in winter and plays an important role in ventilating the deep Southern Ocean. The seasonal evolution of its thickness and density follows the sea ice cycle of growth and decay, reaching a maximum in October-November. The characteristics and location of this modified shelf water are similar to Cape Darnley Bottom Water, thus suggesting the same primary source in the Cape Darnley polynya region. These float data support recent results that the continental shelf along Mac Robertson Land is a significant source of dense waters in East Antarctica. Key Points Modified shelf water was observed by profiling floats along East Antarctica Year-round bottom characteristics on the continental slope 60-72E are described Mac Robertson Land including Cape Darnley is a significant source of dense water ©2013 The Authors. Geophysical Research Letters published by Wiley on behalf of the American Geophysical Union. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84889574609&doi=10.1002%2f2013GL058125&partnerID=40&md5=e7b3111490bf2b2e7415a6881549220f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5558
Appears in Collections: 气候减缓与适应
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作者单位: School of Oceanography, University of Washington, Campus Box 355351, Seattle, WA 98195, United States
Recommended Citation:
Wong A.P.S.,Riser S.C.. Modified shelf water on the continental slope north of Mac Robertson Land, East Antarctica[J]. Geophysical Research Letters,2013-01-01,40(23).