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...
Published in: | Permafrost and Periglacial Processes |
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Format: | Article in Journal/Newspaper |
Language: | English |
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John Wiley & Sons Inc.
2016
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Online Access: | https://lup.lub.lu.se/record/9c556c99-ffbe-4961-804e-a0cf5b0c4cb4 https://doi.org/10.1002/ppp.1851 |
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ftulundlup:oai:lup.lub.lu.se:9c556c99-ffbe-4961-804e-a0cf5b0c4cb4 2024-05-19T07:41:48+00:00 GIS-based Maps and Area Estimates of Northern Hemisphere Permafrost Extent during the Last Glacial Maximum Lindgren, Amelie Hugelius, Gustaf Kuhry, Peter Christensen, Torben R. Vandenberghe, Jef 2016-01-01 https://lup.lub.lu.se/record/9c556c99-ffbe-4961-804e-a0cf5b0c4cb4 https://doi.org/10.1002/ppp.1851 eng eng John Wiley & Sons Inc. https://lup.lub.lu.se/record/9c556c99-ffbe-4961-804e-a0cf5b0c4cb4 http://dx.doi.org/10.1002/ppp.1851 scopus:84959441935 wos:000371830000002 Permafrost and Periglacial Processes; 27(1), pp 6-16 (2016) ISSN: 1045-6740 Physical Geography Area GIS LGM Paleoenvironment Permafrost contributiontojournal/article info:eu-repo/semantics/article text 2016 ftulundlup https://doi.org/10.1002/ppp.1851 2024-04-23T23:34:34Z 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 km2 (which includes 4.7 million km2 of permafrost on exposed coastal sea shelves). The minimum estimate is 32.7 million km2 and the maximum estimate is 35.3 million km2. The extent of LGM permafrost is estimated to have been between c. 9.1 to 11.7 million km2 larger than its current extent on land (23.6 million km2). However, 2.4 million km2 of the lost land area currently remains as subsea permafrost on the submerged coastal shelves. The LGM permafrost extent in the northern circumpolar region during the LGM was therefore about 33 percent larger than at present. The net loss of northern permafrost since the LGM is due to its disappearance in large parts of Eurasia, which is not compensated for by gains in North America in areas formerly covered by the Laurentide ice sheet. Article in Journal/Newspaper Ice Ice Sheet permafrost Permafrost and Periglacial Processes wedge* Lund University Publications (LUP) Permafrost and Periglacial Processes 27 1 6 16 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Physical Geography Area GIS LGM Paleoenvironment Permafrost |
spellingShingle |
Physical Geography Area GIS LGM Paleoenvironment Permafrost Lindgren, Amelie Hugelius, Gustaf Kuhry, Peter Christensen, Torben R. Vandenberghe, Jef GIS-based Maps and Area Estimates of Northern Hemisphere Permafrost Extent during the Last Glacial Maximum |
topic_facet |
Physical Geography Area GIS LGM Paleoenvironment Permafrost |
description |
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 km2 (which includes 4.7 million km2 of permafrost on exposed coastal sea shelves). The minimum estimate is 32.7 million km2 and the maximum estimate is 35.3 million km2. The extent of LGM permafrost is estimated to have been between c. 9.1 to 11.7 million km2 larger than its current extent on land (23.6 million km2). However, 2.4 million km2 of the lost land area currently remains as subsea permafrost on the submerged coastal shelves. The LGM permafrost extent in the northern circumpolar region during the LGM was therefore about 33 percent larger than at present. The net loss of northern permafrost since the LGM is due to its disappearance in large parts of Eurasia, which is not compensated for by gains in North America in areas formerly covered by the Laurentide ice sheet. |
format |
Article in Journal/Newspaper |
author |
Lindgren, Amelie Hugelius, Gustaf Kuhry, Peter Christensen, Torben R. Vandenberghe, Jef |
author_facet |
Lindgren, Amelie Hugelius, Gustaf Kuhry, Peter Christensen, Torben R. Vandenberghe, Jef |
author_sort |
Lindgren, Amelie |
title |
GIS-based Maps and Area Estimates of Northern Hemisphere Permafrost Extent during the Last Glacial Maximum |
title_short |
GIS-based Maps and Area Estimates of Northern Hemisphere Permafrost Extent during the Last Glacial Maximum |
title_full |
GIS-based Maps and Area Estimates of Northern Hemisphere Permafrost Extent during the Last Glacial Maximum |
title_fullStr |
GIS-based Maps and Area Estimates of Northern Hemisphere Permafrost Extent during the Last Glacial Maximum |
title_full_unstemmed |
GIS-based Maps and Area Estimates of Northern Hemisphere Permafrost Extent during the Last Glacial Maximum |
title_sort |
gis-based maps and area estimates of northern hemisphere permafrost extent during the last glacial maximum |
publisher |
John Wiley & Sons Inc. |
publishDate |
2016 |
url |
https://lup.lub.lu.se/record/9c556c99-ffbe-4961-804e-a0cf5b0c4cb4 https://doi.org/10.1002/ppp.1851 |
genre |
Ice Ice Sheet permafrost Permafrost and Periglacial Processes wedge* |
genre_facet |
Ice Ice Sheet permafrost Permafrost and Periglacial Processes wedge* |
op_source |
Permafrost and Periglacial Processes; 27(1), pp 6-16 (2016) ISSN: 1045-6740 |
op_relation |
https://lup.lub.lu.se/record/9c556c99-ffbe-4961-804e-a0cf5b0c4cb4 http://dx.doi.org/10.1002/ppp.1851 scopus:84959441935 wos:000371830000002 |
op_doi |
https://doi.org/10.1002/ppp.1851 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
27 |
container_issue |
1 |
container_start_page |
6 |
op_container_end_page |
16 |
_version_ |
1799481403437481984 |