A new sea-level record for the Neogene/Quaternary boundary reveals transition to a more stable East Antarctic Ice Sheet
A new sea-level record for the Neogene/Quaternary boundary reveals transition to a more stable East Antarctic Ice Sheet
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新近纪/第四纪边界的新海平面记录揭示了向更稳定的东南南极冰盖的过渡
DOI:
10.1073/pnas.2004209117
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发表时间:
2020
期刊:
影响因子:
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通讯作者:
Friedrich
中科院分区:
文献类型:
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作者:
Wilson;Fiebig;Repschläger;Friedrich
Sea-level rise resulting from the instability of polar continental ice sheets represents a major socioeconomic hazard arising from anthropogenic warming, but the response of the largest component of Earth’s cryosphere, the East Antarctic Ice Sheet (EAIS), to global warming is poorly understood. Here we present a detailed record of North Atlantic deep-ocean temperature, global sea-level, and ice-volume change for ∼2.75 to 2.4 Ma ago, when atmospheric partial pressure of carbon dioxide (pCO2) ranged from present-day (>400 parts per million volume, ppmv) to preindustrial (<280 ppmv) values. Our data reveal clear glacial–interglacial cycles in global ice volume and sea level largely driven by the growth and decay of ice sheets in the Northern Hemisphere. Yet, sea-level values during Marine Isotope Stage (MIS) 101 (∼2.55 Ma) also signal substantial melting of the EAIS, and peak sea levels during MIS G7 (∼2.75 Ma) and, perhaps, MIS G1 (∼2.63 Ma) are also suggestive of EAIS instability. During the succeeding glacial–interglacial cycles (MIS 100 to 95), sea levels were distinctly lower than before, strongly suggesting a link between greater stability of the EAIS and increased land-ice volumes in the Northern Hemisphere. We propose that lower sea levels driven by ice-sheet growth in the Northern Hemisphere decreased EAIS susceptibility to ocean melting. Our findings have implications for future EAIS vulnerability to a rapidly warming world.
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DOI:
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发表时间:
2007
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影响因子:
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作者:
N.Watanabe;et al.;梅原さおり
通讯作者:
梅原さおり
影响因子:
14.6
作者:
Martijn Gough
通讯作者:
Martijn Gough
DOI:
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发表时间:
2008
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作者:
S. Rathmann;H. Kuhnert
通讯作者:
H. Kuhnert
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作者:
C. Lear;H. Coxall;G. Foster;D. Lunt;E. Mawbey;Y. Rosenthal;S. Sosdian;E. Thomas;P. Wilson
通讯作者:
C. Lear;H. Coxall;G. Foster;D. Lunt;E. Mawbey;Y. Rosenthal;S. Sosdian;E. Thomas;P. Wilson
DOI:
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