气候变化领域集成服务门户(CCPortal): Recent irreversible retreat phase of Pine Island Glacier

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DOI	10.1038/s41558-023-01887-y
	Recent irreversible retreat phase of Pine Island Glacier
	Reed, Brad; Green, J. A. Mattias; Jenkins, Adrian; Gudmundsson, G. Hilmar
发表日期	2023
ISSN	1758-678X
EISSN	1758-6798
英文摘要	Pine Island Glacier (PIG), a part of the West Antarctic marine ice sheet, has recently undergone substantial changes including speed up, retreat and thinning. Theoretical arguments and modelling work suggest that marine ice sheets can become unstable and undergo irreversible retreat. Here, we use an ice-flow model validated by observational data to show that a rapid PIG retreat in the 1970s from a subglacial ridge to an upstream ice plain was self-enhancing and irreversible. The results suggest that by the early 1970s, the retreat of PIG had reached a point beyond which its original position at the ridge could not be recovered, even during subsequent periods of cooler ocean conditions. The irreversible phase ended by the early 1990s after almost 40 km of retreat and 0.34 mm added to global mean sea level, making PIG the main contributor from the Antarctic ice sheet in this period. It has been suggested that Antarctic ice sheets can become unstable and undergo irreversible retreat, but so far observational evidence for this mechanism is missing. Here, the authors show evidence that such an irreversible retreat occurred at Pine Island Glacier in West Antarctica in the 1970s.
英文关键词	MARINE ICE-SHEET; AMUNDSEN SEA EMBAYMENT; MODEL INTERCOMPARISON PROJECT; GROUNDING LINE RETREAT; WEST ANTARCTICA; THWAITES GLACIER; LEVEL RISE; SHELF; BENEATH; SENSITIVITY
WOS研究方向	Environmental Sciences ; Environmental Studies ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:001112824400001
来源期刊	Nature Climate Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282235
作者单位	Bangor University; Northumbria University
推荐引用方式 GB/T 7714	Reed, Brad,Green, J. A. Mattias,Jenkins, Adrian,et al. Recent irreversible retreat phase of Pine Island Glacier[J],2023.
APA	Reed, Brad,Green, J. A. Mattias,Jenkins, Adrian,&Gudmundsson, G. Hilmar.(2023).Recent irreversible retreat phase of Pine Island Glacier.Nature Climate Change.
MLA	Reed, Brad,et al."Recent irreversible retreat phase of Pine Island Glacier".Nature Climate Change (2023).