Observed rapid bedrock uplift in Amundsen Sea Embayment promotes ice-sheet stability

被引：146

作者：

Barletta, Valentina R. ^{[1
,2
]}

Bevis, Michael ^{[2
]}

Smith, Benjamin E. ^{[3
]}

Wilson, Terry ^{[2
]}

Brown, Abel ^{[2
]}

Bordoni, Andrea ^{[4
]}

Willis, Michael ^{[5
]}

Khan, Shfaqat Abbas ^{[1
]}

Rovira-Navarro, Marc ^{[1
,6
]}

Dalziel, Ian ^{[7
]}

Smalley, Robert, Jr. ^{[8
]}

Kendrick, Eric ^{[2
]}

Konfal, Stephanie ^{[2
]}

Caccamise, Dana J., II ^{[2
]}

Aster, Richard C. ^{[9
]}

Nyblade, Andy ^{[10
]}

Wiens, Douglas A. ^{[11
]}

机构：

[1] Tech Univ Denmark, Natl Space Inst, Geodynam Dept, DTU Space, Lyngby, Denmark

[2] Ohio State Univ, Sch Earth Sci, Columbus, OH 43210 USA

[3] Univ Washington, Seattle, WA 98195 USA

[4] Tech Univ Denmark, DTU Compute, Lyngby, Denmark

[5] Univ Colorado, Boulder, CO 80309 USA

[6] Delft Univ Technol, Delft, Netherlands

[7] Univ Texas Austin, Inst Geophys, Austin, TX USA

[8] Univ Memphis, Ctr Earthquake Res & Informat, Memphis, TN 38152 USA

[9] Colorado State Univ, Ft Collins, CO 80523 USA

[10] Penn State Univ, State Coll, PA USA

[11] Washington Univ, St Louis, MO USA

来源：

SCIENCE | 2018年 / 360卷 / 6395期

基金：

美国国家科学基金会;

关键词：

SOLID-EARTH RESPONSE; MARIE BYRD LAND; WEST ANTARCTICA; RADAR INTERFEROMETRY; PINE ISLAND; RETREAT; BENEATH; GREENLAND; BED;

D O I：

10.1126/science.aao1447

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

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 themantle underneath. We found amuch lower viscosity (4 x 10(18) pascal-second) than global average, and this shortens the GIA response time scale from tens to hundreds of years. 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.

引用

下载

页码：1335 / +

页数：5

共 50 条

[1] Variations in ice-sheet dynamics along the Amundsen Sea and Bellingshausen Sea West Antarctic Ice Sheet margin
Uenzelmann-Neben, Gabriele
GEOLOGICAL SOCIETY OF AMERICA BULLETIN, 2019, 131 (3-4) : 479 - 498
[2] Reversible ice sheet thinning in the Amundsen Sea Embayment during the Late Holocene
Balco, Greg
Brown, Nathan
Nichols, Keir
Venturelli, Ryan A.
Adams, Jonathan
Braddock, Scott
Campbell, Seth
Goehring, Brent
Johnson, Joanne S.
Rood, Dylan H.
Wilcken, Klaus
Hall, Brenda
Woodward, John
CRYOSPHERE, 2023, 17 (04): : 1787 - 1801
[3] Deglacial history of the West Antarctic Ice Sheet in the western Amundsen Sea Embayment
Smith, James A.
Hillenbrand, Claus-Dieter
Kuhn, Gerhard
Larter, Robert D.
Graham, Alastair G. C.
Ehrmann, Werner
Moreton, Steven G.
Forwick, Matthias
QUATERNARY SCIENCE REVIEWS, 2011, 30 (5-6) : 488 - 505
[4] Basement control on past ice sheet dynamics in the Amundsen Sea Embayment, West Antarctica
Gohl, Karsten
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY, 2012, 335 : 35 - 41
[5] Effect of Ice Shelf Changes on Ice Sheet Volume Change in the Amundsen Sea Embayment, West Antarctica
Zhang, Dong
Sun, Bo
Ke, Changqing
Cui, Xiangbin
Li, Xin
Guo, Jingxue
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING, 2014, 7 (03) : 863 - 871
[6] Radiocarbon Constraints on Carbon Release From the Antarctic Ice Sheet Into the Amundsen Sea Embayment
Fang, Ling
Kim, Minkyoung
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES, 2023, 128 (03)
[7] THE AMUNDSEN SEA AND THE ANTARCTIC ICE SHEET
Jacobs, Stan
Jenkins, Adrian
Hellmer, Hartmut
Giulivi, Claudia
Nitsche, Frank
Huber, Bruce
Guerrero, Raul
OCEANOGRAPHY, 2012, 25 (03) : 154 - 163
[8] Late Cenozoic ice sheet cyclicity in the western Amundsen Sea Embayment - Evidence from seismic records
Weigelt, Estella
Gohl, Karsten
Uenzelmann-Neben, Gabriele
Larter, Robert D.
GLOBAL AND PLANETARY CHANGE, 2009, 69 (03) : 162 - 169
[9] Contrasting the modelled sensitivity of the Amundsen Sea Embayment ice streams
Nias, Isabel J.
Cornford, Stephen L.
Payne, Antony J.
JOURNAL OF GLACIOLOGY, 2016, 62 (233) : 552 - 562
[10] ELASTOHYDRODYNAMIC RESPONSE OF AN ICE-SHEET TO FORCED SUBSURFACE UPLIFT
DEMPSEY, JP
ZHAO, ZG
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, 1993, 41 (03) : 487 - 506

← 1 2 3 4 5 →