Buried remnants of the Laurentide Ice Sheet and connections to its surface elevation ...
The Laurentide Ice Sheet (LIS) occupied a large part of North-America during the late Pleistocene. Determining the proper surface geometry and elevation of the LIS is of central importance to estimate global changes in sea-level and atmospheric circulation patterns during the late Pleistocene and Ho...
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ftdatacite:10.20381/ruor-23178 2024-03-31T07:51:48+00:00 Buried remnants of the Laurentide Ice Sheet and connections to its surface elevation ... Lacelle, Denis Fisher, David A. Coulombe, Stéphanie Fortier, Daniel Frappier, Roxanne 2018 https://dx.doi.org/10.20381/ruor-23178 https://ruor.uottawa.ca/handle/10393/38928 en eng My University Text article-journal Article ScholarlyArticle 2018 ftdatacite https://doi.org/10.20381/ruor-23178 2024-03-04T14:03:00Z The Laurentide Ice Sheet (LIS) occupied a large part of North-America during the late Pleistocene. Determining the proper surface geometry and elevation of the LIS is of central importance to estimate global changes in sea-level and atmospheric circulation patterns during the late Pleistocene and Holocene. Despite largely disappearing from the landscape during the late Holocene, LIS remnants are found in the Penny and Barnes ice caps on Baffin Island (Canada) and ongoing permafrost degradation has been exposing relics of the LIS buried along its northern margin since the late Pleistocene. Here, we use the δ18O records of six LIS remnants and the late Pleistocene δ18O-elevation relation to establish ice elevation in their source area during the last glacial maximum (LGM). Contrary to some modeled reconstructions, our findings indicate an asymmetric LIS topography with higher ice on Keewatin Dome (~3200 m) and thinner ice in the prairies along the Plains divide (1700-2100 m) during LGM. The resiliency of icy ... Text Baffin Island Baffin Ice Ice Sheet Keewatin permafrost DataCite Metadata Store (German National Library of Science and Technology) Baffin Island Canada |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
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ftdatacite |
language |
English |
description |
The Laurentide Ice Sheet (LIS) occupied a large part of North-America during the late Pleistocene. Determining the proper surface geometry and elevation of the LIS is of central importance to estimate global changes in sea-level and atmospheric circulation patterns during the late Pleistocene and Holocene. Despite largely disappearing from the landscape during the late Holocene, LIS remnants are found in the Penny and Barnes ice caps on Baffin Island (Canada) and ongoing permafrost degradation has been exposing relics of the LIS buried along its northern margin since the late Pleistocene. Here, we use the δ18O records of six LIS remnants and the late Pleistocene δ18O-elevation relation to establish ice elevation in their source area during the last glacial maximum (LGM). Contrary to some modeled reconstructions, our findings indicate an asymmetric LIS topography with higher ice on Keewatin Dome (~3200 m) and thinner ice in the prairies along the Plains divide (1700-2100 m) during LGM. The resiliency of icy ... |
format |
Text |
author |
Lacelle, Denis Fisher, David A. Coulombe, Stéphanie Fortier, Daniel Frappier, Roxanne |
spellingShingle |
Lacelle, Denis Fisher, David A. Coulombe, Stéphanie Fortier, Daniel Frappier, Roxanne Buried remnants of the Laurentide Ice Sheet and connections to its surface elevation ... |
author_facet |
Lacelle, Denis Fisher, David A. Coulombe, Stéphanie Fortier, Daniel Frappier, Roxanne |
author_sort |
Lacelle, Denis |
title |
Buried remnants of the Laurentide Ice Sheet and connections to its surface elevation ... |
title_short |
Buried remnants of the Laurentide Ice Sheet and connections to its surface elevation ... |
title_full |
Buried remnants of the Laurentide Ice Sheet and connections to its surface elevation ... |
title_fullStr |
Buried remnants of the Laurentide Ice Sheet and connections to its surface elevation ... |
title_full_unstemmed |
Buried remnants of the Laurentide Ice Sheet and connections to its surface elevation ... |
title_sort |
buried remnants of the laurentide ice sheet and connections to its surface elevation ... |
publisher |
My University |
publishDate |
2018 |
url |
https://dx.doi.org/10.20381/ruor-23178 https://ruor.uottawa.ca/handle/10393/38928 |
geographic |
Baffin Island Canada |
geographic_facet |
Baffin Island Canada |
genre |
Baffin Island Baffin Ice Ice Sheet Keewatin permafrost |
genre_facet |
Baffin Island Baffin Ice Ice Sheet Keewatin permafrost |
op_doi |
https://doi.org/10.20381/ruor-23178 |
_version_ |
1795030585239928832 |