DOI: 10.1038/NGEO2230
论文题名: Rapid sea-level rise along the Antarctic margins in response to increased glacial discharge
作者: Rye C.D. ; Garabato A.C.N. ; Holland P.R. ; Meredith M.P. ; Nurser A.J.G. ; Hughes C.W. ; Coward A.C. ; Webb D.J.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2014
卷: 7, 期: 10 起始页码: 732
结束页码: 735
语种: 英语
Scopus关键词: circulation modeling
; discharge
; environmental impact
; freshwater input
; glacial hydrology
; glacier flow
; melting
; sea level change
; sea surface height
; sea surface salinity
; temperature effect
; water mass
; Amundsen Sea
; Antarctic Ice Sheet
; Antarctic Peninsula Shelf
; Antarctica
; Southern Ocean
英文摘要: The Antarctic shelf seas are a climatically and ecologically important region, and are at present receiving increasing amounts of freshwater from the melting of the Antarctic Ice Sheet and its fringing ice shelves1,2, primarily around the Antarctic Peninsula and the Amudsen Sea. In response, the surface ocean salinity in this region has declined in past decades3-9. Here, we assess the effects of the freshwater input on regional sea level using satellite measurements of sea surface height (for months with no sea-ice cover) and a global ocean circulation model. We find that from 1992 to 2011, sea-level rise along the Antarctic coast is at least 2 ± 0.8mmyr-1 greater than the regional mean for the Southern Ocean south of 50° S. On the basis of the model simulations, we conclude that this sea-level rise is almost entirely related to steric adjustment, rather than changes in local ocean mass, with a halosteric rise in the upper ocean and thermosteric contributions at depth. We estimate that an excess freshwater input of 430 ± 230Gtyr-1 is required to explain the observed sea-level rise. We conclude that accelerating discharge from the Antarctic Ice Sheet has had a pronounced and widespread impact on the adjacent subpolar seas over the past two decades. © 2014 Macmillan Publishers Limited. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106408
Appears in Collections: 气候减缓与适应 科学计划与规划
There are no files associated with this item.
作者单位: University of Southampton, National Oceanography Centre, Southampton, United Kingdom; British Antarctic Survey, Cambridge, United Kingdom; Scottish Association for Marine Science, Oban, United Kingdom; School of Environmental Sciences, University of Liverpool, Liverpool, United Kingdom; National Oceanography Centre, Liverpool, United Kingdom
Recommended Citation:
Rye C.D.,Garabato A.C.N.,Holland P.R.,et al. Rapid sea-level rise along the Antarctic margins in response to increased glacial discharge[J]. Nature Geoscience,2014-01-01,7(10)