气候变化领域集成服务门户(CCPortal): Impacts of marine instability across the East Antarctic Ice Sheet on Southern Ocean dynamics

CCPortal

DOI	10.5194/tc-10-2317-2016
	Impacts of marine instability across the East Antarctic Ice Sheet on Southern Ocean dynamics
	Phipps S.J.; Fogwill C.J.; Turney C.S.M.
发表日期	2016
ISSN	19940416
卷号	10 期号:5
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).
学科领域	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
语种	英语
scopus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
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119571
作者单位	Climate Change Research Centre, School of Biological, UNSW, Sydney, NSW 2052, Australia; Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS 7001, Australia; PANGEA Research Centre, UNSW, Sydney, NSW 2052, Australia
推荐引用方式 GB/T 7714	Phipps S.J.,Fogwill C.J.,Turney C.S.M.. Impacts of marine instability across the East Antarctic Ice Sheet on Southern Ocean dynamics[J],2016,10(5).
APA	Phipps S.J.,Fogwill C.J.,&Turney C.S.M..(2016).Impacts of marine instability across the East Antarctic Ice Sheet on Southern Ocean dynamics.Cryosphere,10(5).
MLA	Phipps S.J.,et al."Impacts of marine instability across the East Antarctic Ice Sheet on Southern Ocean dynamics".Cryosphere 10.5(2016).