The configuration of Northern Hemisphere ice sheets through the Quaternary

Batchelor, Christine L, Margold, Martin, Krapp, Mario, Murton, Della K, Dalton, April S, Gibbard, Philip L, Stokes, Chris R, Murton, Julian B and Manica, Andrea (2019) The configuration of Northern Hemisphere ice sheets through the Quaternary. Nature Communications, 10 (1). a3713. ISSN 2041-1723

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Abstract

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.

Item Type: Article
Schools and Departments: School of Global Studies > Geography
Depositing User: Sharon Krummel
Date Deposited: 01 Aug 2019 10:34
Last Modified: 21 Aug 2019 16:00
URI: http://sro.sussex.ac.uk/id/eprint/85241

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