气候变化领域集成服务门户(CCPortal): Rapid retreat of Thwaites Glacier in the pre-satellite era

CCPortal

DOI	10.1038/s41561-022-01019-9
	Rapid retreat of Thwaites Glacier in the pre-satellite era
	Graham, Alastair G. C.; Wahlin, Anna; Hogan, Kelly A.; Nitsche, Frank O.; Heywood, Karen J.; Totten, Rebecca L.; Smith, James A.; Hillenbrand, Claus-Dieter; Simkins, Lauren M.; Anderson, John B.; Wellner, Julia S.; Larter, Robert D.
发表日期	2022
ISSN	1752-0894
EISSN	1752-0908
起始页码	706
结束页码	+
卷号	15 期号:9 页码:10
英文摘要	The Thwaites Glacier grounding zone has experienced sustained pulses of rapid retreat over the past two centuries, according to sea floor observations obtained by an autonomous underwater vehicle. Understanding the recent history of Thwaites Glacier, and the processes controlling its ongoing retreat, is key to projecting Antarctic contributions to future sea-level rise. Of particular concern is how the glacier grounding zone might evolve over coming decades where it is stabilized by sea-floor bathymetric highs. Here we use geophysical data from an autonomous underwater vehicle deployed at the Thwaites Glacier ice front, to document the ocean-floor imprint of past retreat from a sea-bed promontory. We show patterns of back-stepping sedimentary ridges formed daily by a mechanism of tidal lifting and settling at the grounding line at a time when Thwaites Glacier was more advanced than it is today. Over a duration of 5.5 months, Thwaites grounding zone retreated at a rate of >2.1 km per year-twice the rate observed by satellite at the fastest retreating part of the grounding zone between 2011 and 2019. Our results suggest that sustained pulses of rapid retreat have occurred at Thwaites Glacier in the past two centuries. Similar rapid retreat pulses are likely to occur in the near future when the grounding zone migrates back off stabilizing high points on the sea floor.
学科领域	Geosciences, Multidisciplinary
语种	英语
WOS研究方向	Geology
WOS记录号	WOS:000850019600001
来源期刊	NATURE GEOSCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/272626
作者单位	State University System of Florida; University of South Florida; University of Gothenburg; UK Research & Innovation (UKRI); Natural Environment Research Council (NERC); NERC British Antarctic Survey; Columbia University; University of East Anglia; University of Alabama System; University of Alabama Tuscaloosa; University of Virginia; Rice University; University of Houston System; University of Houston
推荐引用方式 GB/T 7714	Graham, Alastair G. C.,Wahlin, Anna,Hogan, Kelly A.,et al. Rapid retreat of Thwaites Glacier in the pre-satellite era[J],2022,15(9):10.
APA	Graham, Alastair G. C..,Wahlin, Anna.,Hogan, Kelly A..,Nitsche, Frank O..,Heywood, Karen J..,...&Larter, Robert D..(2022).Rapid retreat of Thwaites Glacier in the pre-satellite era.NATURE GEOSCIENCE,15(9),10.
MLA	Graham, Alastair G. C.,et al."Rapid retreat of Thwaites Glacier in the pre-satellite era".NATURE GEOSCIENCE 15.9(2022):10.