The configuration of Northern Hemisphere ice sheets through the Quaternary

被引：373

作者：

Batchelor, Christine L. ^{[1
,2
]}

Margold, Martin ^{[3
]}

Krapp, Mario ^{[4
]}

Murton, Della K. ^{[4
]}

Dalton, April S. ^{[5
]}

Gibbard, Philip L. ^{[1
]}

Stokes, Chris R. ^{[5
]}

Murton, Julian B. ^{[6
]}

Manica, Andrea ^{[4
]}

机构：

[1] Univ Cambridge, Scott Polar Res Inst, Dept Geog, Cambridge CB2 1ER, England

[2] Norwegian Univ Sci & Technol NTNU, Dept Geosci & Petr, NO-7491 Trondheim, Norway

[3] Charles Univ Prague, Dept Phys Geog & Geoecol, Prague 12843, Czech Republic

[4] Univ Cambridge, Dept Zool, Cambridge CB2 3EJ, England

[5] Univ Durham, Dept Geog, Durham DH1 3LE, England

[6] Univ Sussex, Dept Geog, Brighton BN1 9RH, E Sussex, England

来源：

NATURE COMMUNICATIONS | 2019年 / 10卷 / 1期

基金：

瑞典研究理事会;

关键词：

LAST GLACIAL MAXIMUM; SEA-LEVEL; PLEISTOCENE GLACIATIONS; HISTORY; CLIMATE; RECONSTRUCTION; TOPOGRAPHY; MODEL; CYCLE; STRATIGRAPHY;

D O I：

10.1038/s41467-019-11601-2

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：

Our understanding of how global climatic changes are translated into ice-sheet fluctuations and sea-level change is currently limited by a lack of knowledge of the configuration of ice sheets prior to the Last Glacial Maximum (LGM). Here, we compile a synthesis of empirical data and numerical modelling results related to pre-LGM ice sheets to produce new hypotheses regarding their extent in the Northern Hemisphere (NH) at 17 time-slices that span the Quaternary. Our reconstructions illustrate pronounced ice-sheet asymmetry within the last glacial cycle and significant variations in ice-marginal positions between older glacial cycles. We find support for a significant reduction in the extent of the Laurentide Ice Sheet (LIS) during MIS 3, implying that global sea levels may have been 30-40 m higher than most previous estimates. Our ice-sheet reconstructions illustrate the current state-of-the-art knowledge of pre-LGM ice sheets and provide a conceptual framework to interpret NH landscape evolution.

引用

页数：10

共 73 条

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