Cordilleran Ice Sheet Stability During the Last Deglaciation
We report 20 10 Be exposure ages from glacial erratics and bedrock on the west coast of British Columbia, Canada, which add to existing chronologies of Cordilleran Ice Sheet retreat along ∼600 km of coastal North America. Collectively, these data show the western ice limit reached the present coast...
Published in: | Geophysical Research Letters |
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Language: | English |
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2022
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Online Access: | https://research.manchester.ac.uk/en/publications/d67b98f0-20ba-422e-ab88-2566c1b8236c https://doi.org/10.1029/2021GL097191 http://www.scopus.com/inward/record.url?scp=85131308999&partnerID=8YFLogxK |
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ftumanchesterpub:oai:pure.atira.dk:publications/d67b98f0-20ba-422e-ab88-2566c1b8236c 2024-06-23T07:53:44+00:00 Cordilleran Ice Sheet Stability During the Last Deglaciation Darvill, C. M. Menounos, B. Goehring, B. M. Lesnek, A. J. 2022-05-28 https://research.manchester.ac.uk/en/publications/d67b98f0-20ba-422e-ab88-2566c1b8236c https://doi.org/10.1029/2021GL097191 http://www.scopus.com/inward/record.url?scp=85131308999&partnerID=8YFLogxK eng eng https://research.manchester.ac.uk/en/publications/d67b98f0-20ba-422e-ab88-2566c1b8236c info:eu-repo/semantics/openAccess Darvill , C M , Menounos , B , Goehring , B M & Lesnek , A J 2022 , ' Cordilleran Ice Sheet Stability During the Last Deglaciation ' , Geophysical Research Letters , vol. 49 , no. 10 , e2021GL097191 . https://doi.org/10.1029/2021GL097191 Cordilleran Ice Sheet cosmogenic nuclide exposure dating deglaciation stability thinning article 2022 ftumanchesterpub https://doi.org/10.1029/2021GL097191 2024-06-04T01:01:08Z We report 20 10 Be exposure ages from glacial erratics and bedrock on the west coast of British Columbia, Canada, which add to existing chronologies of Cordilleran Ice Sheet retreat along ∼600 km of coastal North America. Collectively, these data show the western ice limit reached the present coast by 18–16 ka then retreat slowed for ∼4,000 years until 14–13 ka. We attribute initial retreat to destabilization and grounding line retreat resulting from rising sea level and/or ocean warming in the northern Pacific. Subsequent stability of the ice sheet at the present coastal margin was likely due to the transition from marine to terrestrial margins despite increasing temperatures that may have driven ice sheet thinning. Our findings demonstrate the importance of understanding both climatic and nonclimatic drivers of ice sheet change through time. Article in Journal/Newspaper Ice Sheet The University of Manchester: Research Explorer British Columbia ENVELOPE(-125.003,-125.003,54.000,54.000) Canada Pacific Geophysical Research Letters 49 10 |
institution |
Open Polar |
collection |
The University of Manchester: Research Explorer |
op_collection_id |
ftumanchesterpub |
language |
English |
topic |
Cordilleran Ice Sheet cosmogenic nuclide exposure dating deglaciation stability thinning |
spellingShingle |
Cordilleran Ice Sheet cosmogenic nuclide exposure dating deglaciation stability thinning Darvill, C. M. Menounos, B. Goehring, B. M. Lesnek, A. J. Cordilleran Ice Sheet Stability During the Last Deglaciation |
topic_facet |
Cordilleran Ice Sheet cosmogenic nuclide exposure dating deglaciation stability thinning |
description |
We report 20 10 Be exposure ages from glacial erratics and bedrock on the west coast of British Columbia, Canada, which add to existing chronologies of Cordilleran Ice Sheet retreat along ∼600 km of coastal North America. Collectively, these data show the western ice limit reached the present coast by 18–16 ka then retreat slowed for ∼4,000 years until 14–13 ka. We attribute initial retreat to destabilization and grounding line retreat resulting from rising sea level and/or ocean warming in the northern Pacific. Subsequent stability of the ice sheet at the present coastal margin was likely due to the transition from marine to terrestrial margins despite increasing temperatures that may have driven ice sheet thinning. Our findings demonstrate the importance of understanding both climatic and nonclimatic drivers of ice sheet change through time. |
format |
Article in Journal/Newspaper |
author |
Darvill, C. M. Menounos, B. Goehring, B. M. Lesnek, A. J. |
author_facet |
Darvill, C. M. Menounos, B. Goehring, B. M. Lesnek, A. J. |
author_sort |
Darvill, C. M. |
title |
Cordilleran Ice Sheet Stability During the Last Deglaciation |
title_short |
Cordilleran Ice Sheet Stability During the Last Deglaciation |
title_full |
Cordilleran Ice Sheet Stability During the Last Deglaciation |
title_fullStr |
Cordilleran Ice Sheet Stability During the Last Deglaciation |
title_full_unstemmed |
Cordilleran Ice Sheet Stability During the Last Deglaciation |
title_sort |
cordilleran ice sheet stability during the last deglaciation |
publishDate |
2022 |
url |
https://research.manchester.ac.uk/en/publications/d67b98f0-20ba-422e-ab88-2566c1b8236c https://doi.org/10.1029/2021GL097191 http://www.scopus.com/inward/record.url?scp=85131308999&partnerID=8YFLogxK |
long_lat |
ENVELOPE(-125.003,-125.003,54.000,54.000) |
geographic |
British Columbia Canada Pacific |
geographic_facet |
British Columbia Canada Pacific |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Darvill , C M , Menounos , B , Goehring , B M & Lesnek , A J 2022 , ' Cordilleran Ice Sheet Stability During the Last Deglaciation ' , Geophysical Research Letters , vol. 49 , no. 10 , e2021GL097191 . https://doi.org/10.1029/2021GL097191 |
op_relation |
https://research.manchester.ac.uk/en/publications/d67b98f0-20ba-422e-ab88-2566c1b8236c |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2021GL097191 |
container_title |
Geophysical Research Letters |
container_volume |
49 |
container_issue |
10 |
_version_ |
1802645537970716672 |