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

[1] A large West Antarctic Ice Sheet explains early Neogene sea-level amplitude
Marschalek, J. W.
Zurli, L.
Talarico, F.
van de Flierdt, T.
Vermeesch, P.
Carter, A.
Beny, F.
Bout-Roumazeilles, V
Sangiorgi, F.
Hemming, S. R.
Perez, L. F.
Colleoni, F.
Prebble, J. G.
van Peer, T. E.
Perotti, M.
Shevenell, A. E.
Browne, I
Kulhanek, D. K.
Levy, R.
Harwood, D.
Sullivan, N. B.
Meyers, S. R.
Griffith, E. M.
Hillenbrand, C-D
Gasson, E.
Siegert, M. J.
Keisling, B.
Licht, K. J.
Kuhn, G.
Dodd, J. P.
Boshuis, C.
De Santis, L.
McKay, R. M.
NATURE, 2021, 600 (7889) : 450 - 455
[2] FUTURE SEA-LEVEL CHANGES DUE TO WEST ANTARCTIC ICE SHEET FLUCTUATIONS
CLARK, JA
LINGLE, CS
NATURE, 1977, 269 (5625) : 206 - 209
[3] Reassessment of the Potential Sea-Level Rise from a Collapse of the West Antarctic Ice Sheet
Bamber, Jonathan L.
Riva, Riccardo E. M.
Vermeersen, Bert L. A.
LeBrocq, Anne M.
SCIENCE, 2009, 324 (5929) : 901 - 903
[4] Rapid sea-level rise soon from West Antarctic ice sheet collapse?
Bentley, CR
SCIENCE, 1997, 275 (5303) : 1077 - 1078
[5] Sea-level projections representing the deeply uncertain contribution of the West Antarctic ice sheet
Alexander M. R. Bakker
Tony E. Wong
Kelsey L. Ruckert
Klaus Keller
Scientific Reports, 7
[6] Sea-level projections representing the deeply uncertain contribution of the West Antarctic ice sheet
Bakker, Alexander M. R.
Wong, Tony E.
Ruckert, Kelsey L.
Keller, Klaus
SCIENTIFIC REPORTS, 2017, 7
[7] A new sea-level record for the Neogene/Quaternary boundary reveals transition to a more stable East Antarctic Ice Sheet
Jakob, Kim A.
Wilson, Paul A.
Pross, Joerg
Ezard, Thomas H. G.
Fiebig, Jens
Repschlaeger, Janne
Friedrich, Oliver
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2020, 117 (49) : 30980 - 30987
[8] Briefing: Antarctic ice sheet mass loss and future sea-level rise
Scambos, Ted
Abraham, John
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-FORENSIC ENGINEERING, 2015, 168 (02) : 81 - 84
[9] Rapid sea-level rise from a West Antarctic ice-sheet collapse: a short-term perspective
Bentley, CR
JOURNAL OF GLACIOLOGY, 1998, 44 (146) : 157 - 163
[10] The Sea-Level Fingerprint of West Antarctic Collapse
Mitrovica, Jerry X.
Gomez, Natalya
Clark, Peter U.
SCIENCE, 2009, 323 (5915) : 753 - 753

← 1 2 3 4 5 →