Laurentide Ice Sheet basal temperatures during the last glacial cycle as inferred from borehole data
Thirteen temperature–depth profiles ( ≥ 1500 m) measured in boreholes in eastern and central Canada were inverted to determine the ground surface temperature histories during and after the last glacial cycle. The sites are located in the southern part of the region that was covered by the Laurentide...
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ftdoajarticles:oai:doaj.org/article:77e6d910c82c4f0bac6dc3372474be03 2023-05-15T16:39:47+02:00 Laurentide Ice Sheet basal temperatures during the last glacial cycle as inferred from borehole data C. Pickler H. Beltrami J.-C. Mareschal 2016-01-01T00:00:00Z https://doi.org/10.5194/cp-12-115-2016 https://doaj.org/article/77e6d910c82c4f0bac6dc3372474be03 EN eng Copernicus Publications http://www.clim-past.net/12/115/2016/cp-12-115-2016.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-12-115-2016 https://doaj.org/article/77e6d910c82c4f0bac6dc3372474be03 Climate of the Past, Vol 12, Iss 1, Pp 115-127 (2016) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2016 ftdoajarticles https://doi.org/10.5194/cp-12-115-2016 2022-12-31T14:55:17Z Thirteen temperature–depth profiles ( ≥ 1500 m) measured in boreholes in eastern and central Canada were inverted to determine the ground surface temperature histories during and after the last glacial cycle. The sites are located in the southern part of the region that was covered by the Laurentide Ice Sheet. The inversions yield ground surface temperatures ranging from −1.4 to 3.0 °C throughout the last glacial cycle. These temperatures, near the pressure melting point of ice, allowed basal flow and fast flowing ice streams at the base of the Laurentide Ice Sheet. Despite such conditions, which have been inferred from geomorphological data, the ice sheet persisted throughout the last glacial cycle. Our results suggest some regional trends in basal temperatures with possible control by internal heat flow. Article in Journal/Newspaper Ice Sheet Directory of Open Access Journals: DOAJ Articles Canada Climate of the Past 12 1 115 127 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 C. Pickler H. Beltrami J.-C. Mareschal Laurentide Ice Sheet basal temperatures during the last glacial cycle as inferred from borehole data |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
Thirteen temperature–depth profiles ( ≥ 1500 m) measured in boreholes in eastern and central Canada were inverted to determine the ground surface temperature histories during and after the last glacial cycle. The sites are located in the southern part of the region that was covered by the Laurentide Ice Sheet. The inversions yield ground surface temperatures ranging from −1.4 to 3.0 °C throughout the last glacial cycle. These temperatures, near the pressure melting point of ice, allowed basal flow and fast flowing ice streams at the base of the Laurentide Ice Sheet. Despite such conditions, which have been inferred from geomorphological data, the ice sheet persisted throughout the last glacial cycle. Our results suggest some regional trends in basal temperatures with possible control by internal heat flow. |
format |
Article in Journal/Newspaper |
author |
C. Pickler H. Beltrami J.-C. Mareschal |
author_facet |
C. Pickler H. Beltrami J.-C. Mareschal |
author_sort |
C. Pickler |
title |
Laurentide Ice Sheet basal temperatures during the last glacial cycle as inferred from borehole data |
title_short |
Laurentide Ice Sheet basal temperatures during the last glacial cycle as inferred from borehole data |
title_full |
Laurentide Ice Sheet basal temperatures during the last glacial cycle as inferred from borehole data |
title_fullStr |
Laurentide Ice Sheet basal temperatures during the last glacial cycle as inferred from borehole data |
title_full_unstemmed |
Laurentide Ice Sheet basal temperatures during the last glacial cycle as inferred from borehole data |
title_sort |
laurentide ice sheet basal temperatures during the last glacial cycle as inferred from borehole data |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/cp-12-115-2016 https://doaj.org/article/77e6d910c82c4f0bac6dc3372474be03 |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Climate of the Past, Vol 12, Iss 1, Pp 115-127 (2016) |
op_relation |
http://www.clim-past.net/12/115/2016/cp-12-115-2016.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 1814-9324 1814-9332 doi:10.5194/cp-12-115-2016 https://doaj.org/article/77e6d910c82c4f0bac6dc3372474be03 |
op_doi |
https://doi.org/10.5194/cp-12-115-2016 |
container_title |
Climate of the Past |
container_volume |
12 |
container_issue |
1 |
container_start_page |
115 |
op_container_end_page |
127 |
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1766030112651739136 |