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The configuration of Northern Hemisphere ice sheets through the Quaternary

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posted on 2023-06-07, 06:40 authored by Christine L Batchelor, Martin Margold, Mario Krapp, Della K Murton, April S Dalton, Philip L Gibbard, Chris R Stokes, Julian MurtonJulian Murton, Andrea Manica
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 26 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 30 landscape evolution.

History

Publication status

  • Published

File Version

  • Published version

Journal

Nature Communications

ISSN

2041-1723

Publisher

Nature Publishing Group

Issue

1

Volume

10

Article number

a3713

Department affiliated with

  • Geography Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2019-08-01

First Open Access (FOA) Date

2019-08-21

First Compliant Deposit (FCD) Date

2019-07-31

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