DOI: 10.5194/tc-10-2317-2016
Scopus记录号: 2-s2.0-84989942055
论文题名: Impacts of marine instability across the East Antarctic Ice Sheet on Southern Ocean dynamics
作者: Phipps S ; J ; , Fogwill C ; J ; , Turney C ; S ; M
刊名: Cryosphere
ISSN: 19940416
出版年: 2016
卷: 10, 期: 5 起始页码: 2317
结束页码: 2328
语种: 英语
英文关键词: Antarctic Bottom Water
; climate modeling
; ice retreat
; oceanic circulation
; sea level
; sea surface
; stratification
; surface water
; Antarctic Ice Sheet
; Antarctica
; East Antarctic Ice Sheet
; East Antarctica
; Southern Ocean
; Weddell Sea
; West Antarctic Ice Sheet
; West Antarctica
; Wilkes Subglacial Basin
英文摘要: Recent observations and modelling studies have demonstrated the potential for rapid and substantial retreat of large sectors of the East Antarctic Ice Sheet (EAIS). This has major implications for ocean circulation and global sea level. Here we examine the effects of increasing meltwater from the Wilkes Basin, one of the major marine-based sectors of the EAIS, on Southern Ocean dynamics. Climate model simulations reveal that the meltwater flux rapidly stratifies surface waters, leading to a dramatic decrease in the rate of Antarctic Bottom Water (AABW) formation. The surface ocean cools but, critically, the Southern Ocean warms by more than 1°C at depth. This warming is accompanied by a Southern Ocean-wide "domino effect", whereby the warming signal propagates westward with depth. Our results suggest that melting of one sector of the EAIS could result in accelerated warming across other sectors, including the Weddell Sea sector of the West Antarctic Ice Sheet. Thus, localised melting of the EAIS could potentially destabilise the wider Antarctic Ice Sheet. © 2016 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75068
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Climate Change Research Centre, School of Biological, UNSW, Sydney, NSW, Australia; Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, Australia; PANGEA Research Centre, UNSW, Sydney, NSW, Australia
Recommended Citation:
Phipps S,J,, Fogwill C,et al. Impacts of marine instability across the East Antarctic Ice Sheet on Southern Ocean dynamics[J]. Cryosphere,2016-01-01,10(5)