GIS-based maps and area estimates of Northern Hemisphere permafrost extent during the Last Glacial Maximum

This study presents GIS-based estimates of permafrost extent in the northern circumpolar region during the Last Glacial Maximum (LGM), based on a review of previously published maps and compilations of field evidence in the form of ice-wedge pseudomorphs and relict sand wedges. We focus on field evi...

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Bibliographic Details
Published in:Permafrost and Periglacial Processes
Main Authors: Lindgren, A., Hugelius, G., Kuhry, P., Christensen, T.R., Vandenberghe, J.F.
Format: Article in Journal/Newspaper
Language:English
Published: 2016
Subjects:
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water
name=SDG 14 - Life Below Water
Ice
permafrost
Permafrost and Periglacial Processes
wedge*
Online Access:https://research.vu.nl/en/publications/38a3b59c-c26e-4243-97ff-01cdb308dac6
https://doi.org/10.1002/ppp.1851
https://hdl.handle.net/1871.1/38a3b59c-c26e-4243-97ff-01cdb308dac6
Description
Summary:This study presents GIS-based estimates of permafrost extent in the northern circumpolar region during the Last Glacial Maximum (LGM), based on a review of previously published maps and compilations of field evidence in the form of ice-wedge pseudomorphs and relict sand wedges. We focus on field evidence localities in areas thought to have been located along the past southern border of permafrost. We present different reconstructions of permafrost extent, with areal estimates of exposed sea shelf, ice sheets and glaciers, to assess areas of minimum, likely and maximum permafrost extents. The GIS-based mapping of these empirical reconstructions allows us to estimate the likely area of northern permafrost during the LGM as 34.5 million km

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