A large West Antarctic Ice Sheet explains early Neogene sea-level amplitude

被引：0

作者：

J. W. Marschalek

L. Zurli

F. Talarico

T. van de Flierdt

P. Vermeesch

A. Carter

F. Beny

V. Bout-Roumazeilles

F. Sangiorgi

S. R. Hemming

L. F. Pérez

F. Colleoni

J. G. Prebble

T. E. van Peer

M. Perotti

A. E. Shevenell

I. Browne

D. K. Kulhanek

R. Levy

D. Harwood

N. B. Sullivan

S. R. Meyers

E. M. Griffith

C.-D. Hillenbrand

E. Gasson

M. J. Siegert

B. Keisling

K. J. Licht

G. Kuhn

J. P. Dodd

C. Boshuis

L. De Santis

R. M. McKay

机构：

[1] Imperial College London,Department of Earth Science and Engineering

[2] University of Siena,Department of Physical, Earth and Environmental Sciences

[3] University College London,Department of Earth Sciences

[4] Birkbeck,Department of Earth and Planetary Sciences

[5] University of London,Department of Earth Sciences, Marine Palynology and Paleoceanography

[6] Laboratoire d’Océanologie et de Géosciences,Geological Survey of Denmark and Greenland

[7] UMR 8187 CNRS/Univ Lille/ULCO,National Oceanography Centre Southampton

[8] Utrecht University,College of Marine Science

[9] Lamont-Doherty Earth Observatory of Columbia University Palisades,Institute of Geosciences

[10] British Antarctic Survey,Antarctic Research Centre

[11] Department of Marine Geology,Department of Earth and Atmospheric Sciences

[12] National Institute of Oceanography and Applied Geophysics – OGS,Department of Geoscience

[13] GNS Science,School of Earth Sciences

[14] University of Southampton Waterfront Campus,Centre for Geography and Environmental Sciences

[15] University of South Florida,Grantham Institute

[16] International Ocean Discovery Program,Department of Earth Sciences

[17] Christian-Albrechts-University of Kiel,Alfred Wegener Institute

[18] Victoria University of Wellington,Department of Geology and Environmental Geosciences

[19] University of Nebraska-Lincoln,Department of Earth, Environmental and Planetary Sciences

[20] University of Wisconsin-Madison,Helmholtz Centre for Polar and Marine Research

[21] Ohio State University,School of Biological & Marine Sciences

[22] University of Exeter,Marine Geology Research Group

[23] Imperial College London,Division of Polar

[24] Indiana University Purdue University Indianapolis,Earth System Sciences

[25] Helmholtz Centre for Polar and Marine Research,Division of Polar Paleoenvironment

[26] Northern Illinois University,Department of Geology

[27] Rice University,Department of Geosciences

[28] Alfred Wegener Institute,Department of Geological Sciences and Environmental Studies

[29] Plymouth University,Department of Geosciences

[30] Geological Survey of Japan,Institute of Low Temperature Science

[31] AIST,Instituto de Geociencias

[32] Korea Polar Research Institute,undefined

[33] Korea Polar Research Institute,undefined

[34] University of Tromsø,undefined

[35] University of Massachusetts,undefined

[36] Amherst,undefined

[37] Marine Geology,undefined

[38] Alfred Wegener Institute,undefined

[39] Binghamton University,undefined

[40] State University of New York,undefined

[41] Virginia Tech,undefined

[42] MARUM,undefined

[43] University of Bremen,undefined

[44] Hokkaido University,undefined

[45] Polar Biology Lab,undefined

[46] National Centre for Polar and Ocean Research (NCPOR) Headland Sada,undefined

[47] Universidade de Brasília,undefined

[48] Campus Universitário Darcy Ribeiro,undefined

[49] State Key Laboratory of Marine Geology,undefined

[50] Tongji University,undefined

来源：

Nature | 2021年 / 600卷

关键词：

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Early to Middle Miocene sea-level oscillations of approximately 40–60 m estimated from far-field records1–3 are interpreted to reflect the loss of virtually all East Antarctic ice during peak warmth2. This contrasts with ice-sheet model experiments suggesting most terrestrial ice in East Antarctica was retained even during the warmest intervals of the Middle Miocene4,5. Data and model outputs can be reconciled if a large West Antarctic Ice Sheet (WAIS) existed and expanded across most of the outer continental shelf during the Early Miocene, accounting for maximum ice-sheet volumes. Here we provide the earliest geological evidence proving large WAIS expansions occurred during the Early Miocene (~17.72–17.40 Ma). Geochemical and petrographic data show glacimarine sediments recovered at International Ocean Discovery Program (IODP) Site U1521 in the central Ross Sea derive from West Antarctica, requiring the presence of a WAIS covering most of the Ross Sea continental shelf. Seismic, lithological and palynological data reveal the intermittent proximity of grounded ice to Site U1521. The erosion rate calculated from this sediment package greatly exceeds the long-term mean, implying rapid erosion of West Antarctica. This interval therefore captures a key step in the genesis of a marine-based WAIS and a tipping point in Antarctic ice-sheet evolution.

引用

页码：450 / 455

页数：5

共 50 条

[21] Linear sea-level response to abrupt ocean warming of major West Antarctic ice basin
Mengel, M.
Feldmann, J.
Levermann, A.
NATURE CLIMATE CHANGE, 2016, 6 (01) : 71 - +
[22] Late Pleistocene and Holocene melting history of the Antarctic ice sheet derived from sea-level variations
Nakada, M
Kimura, R
Okuno, J
Moriwaki, K
Miura, H
Maemoku, H
MARINE GEOLOGY, 2000, 167 (1-2) : 85 - 103
[23] The Influence of the Solid Earth on the Contribution of Marine Sections of the Antarctic Ice Sheet to Future Sea-Level Change
Yousefi, M.
Wan, J.
Pan, L.
Gomez, N.
Latychev, K.
Mitrovica, J. X.
Pollard, D.
DeConto, R. M.
GEOPHYSICAL RESEARCH LETTERS, 2022, 49 (15)
[24] Snowfall-driven growth in East Antarctic ice sheet mitigates recent sea-level rise
Davis, CH
Li, YH
McConnell, JR
Frey, MM
Hanna, E
SCIENCE, 2005, 308 (5730) : 1898 - 1901
[25] Increased snowfall over the Antarctic Ice Sheet mitigated twentieth-century sea-level rise
Medley, B.
Thomas, E. R.
NATURE CLIMATE CHANGE, 2019, 9 (01) : 34 - +
[26] Increased snowfall over the Antarctic Ice Sheet mitigated twentieth-century sea-level rise
B. Medley
E. R. Thomas
Nature Climate Change, 2019, 9 : 34 - 39
[27] Recent sea-level contributions of the Antarctic and Greenland ice sheets
Shepherd, Andrew
Wingham, Duncan
SCIENCE, 2007, 315 (5818) : 1529 - 1532
[28] Resolving the argument about volcanic bedrock under the West Antarctic Ice Sheet and implications for ice sheet stability and sea level change
Andrews, John T.
LeMasurier, Wesley
EARTH AND PLANETARY SCIENCE LETTERS, 2021, 568
[29] 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
[30] Ice-sheet contributions to future sea-level change
Gregory, J. M.
Huybrechts, P.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 2006, 364 (1844): : 1709 - 1731

← 1 2 3 4 5 →