气候变化领域集成服务门户(CCPortal): Observed rapid bedrock uplift in amundsen sea embayment promotes ice-sheet stability

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DOI	10.1126/science.aao1447
	Observed rapid bedrock uplift in amundsen sea embayment promotes ice-sheet stability
	Barletta V.R.; Bevis M.; Smith B.E.; Wilson T.; Brown A.; Bordoni A.; Willis M.; Khan S.A.; Rovira-Navarro M.; Dalziel I.; Smalley R.; Kendrick E.; Konfal S.; Caccamise D.J.; Aster R.C.; Nyblade A.; Wiens D.A.
发表日期	2018
ISSN	0036-8075
起始页码	1335
结束页码	1339
卷号	360 期号:6395
英文摘要	The marine portion of the West Antarctic Ice Sheet (WAIS) in the Amundsen Sea Embayment (ASE) accounts for one-fourth of the cryospheric contribution to global sea-level rise and is vulnerable to catastrophic collapse. The bedrock response to ice mass loss, glacial isostatic adjustment (GIA), was thought to occur on a time scale of 10,000 years. We used new GPS measurements, which show a rapid (41 millimeters per year) uplift of the ASE, to estimate the viscosity of the mantle underneath. We found a much lower viscosity (4 × 1018 pascal-second) than global average, and this shortens the GIA response time scale to decades up to a century. Our finding requires an upward revision of ice mass loss from gravity data of 10% and increases the potential stability of the WAIS against catastrophic collapse. © 2017 The Authors.
英文关键词	ice; bedrock; catastrophic event; collapse; cryosphere; glacioisostasy; GPS; mantle; sea level change; uplift; viscosity; vulnerability; Antarctica; Article; bedrock; Cretaceous; cryosphere; geological time; glacial isostatic adjustment; glaciation; gravity; ice sheet stability; lithosphere; negative feedback; Paleozoic; physical parameters; prediction; priority journal; rock; sea level; signal noise ratio; viscoelasticity; viscosity; Amundsen Sea; Antarctic Ice Sheet; Antarctica; Southern Ocean; West Antarctic Ice Sheet; West Antarctica
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/242957
作者单位	DTU Space, National Space Institute, Geodynamics Department, Technical University of Denmark, Kgs. Lyngby, Denmark; School of Earth Science, Ohio State University, Columbus, OH, United States; University of Washington, Seattle, WA, United States; DTU Compute, Technical University of Denmark, Kgs. Lyngby, Denmark; University of Colorado Boulder, Boulder, CO, United States; TU Delft, Delft, Netherlands; Institute for Geophysics, University of Texas, Austin, TX, United States; Center for Earthquake Research and Information, University of Memphis, Memphis, TN, United States; Colorado State University, Fort Collins, CO, United States; Penn State University, State CollegePA, United States; Washington University in St. Louis, St. Louis, MO, United States
推荐引用方式 GB/T 7714	Barletta V.R.,Bevis M.,Smith B.E.,et al. Observed rapid bedrock uplift in amundsen sea embayment promotes ice-sheet stability[J],2018,360(6395).
APA	Barletta V.R..,Bevis M..,Smith B.E..,Wilson T..,Brown A..,...&Wiens D.A..(2018).Observed rapid bedrock uplift in amundsen sea embayment promotes ice-sheet stability.Science,360(6395).
MLA	Barletta V.R.,et al."Observed rapid bedrock uplift in amundsen sea embayment promotes ice-sheet stability".Science 360.6395(2018).