Elevation changes of the Fennoscandian Ice Sheet interior during the last deglaciation
The dynamics of ice sheet interiors during the last deglaciation are poorly constrained, hindering evaluation of ice sheet models. We provide direct evidence of Fennoscandian Ice Sheet (FIS) interior behaviour during deglaciation through surface exposure dating. Our results demonstrate early thinnin...
Published in: | Geophysical Research Letters |
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American Geophysical Union. (Wiley)
2020
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Online Access: | http://researchonline.ljmu.ac.uk/id/eprint/13197/ https://researchonline.ljmu.ac.uk/id/eprint/13197/8/Elevation%20changes%20of%20the%20Fennoscandian%20Ice%20Sheet%20interior%20during%20the%20last%20deglaciation.pdf https://doi.org/10.1029/2020GL088796 |
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ftliverpooljmu:oai:researchonline.ljmu.ac.uk:13197 2023-05-15T16:12:51+02:00 Elevation changes of the Fennoscandian Ice Sheet interior during the last deglaciation Lane, TP Paasche, Ø Kvisvik, B Adamson, K Rodés, Á Patton, H Gomez, N Gheorghiu, D Bakke, J Hubbard, A 2020-07-17 text http://researchonline.ljmu.ac.uk/id/eprint/13197/ https://researchonline.ljmu.ac.uk/id/eprint/13197/8/Elevation%20changes%20of%20the%20Fennoscandian%20Ice%20Sheet%20interior%20during%20the%20last%20deglaciation.pdf https://doi.org/10.1029/2020GL088796 en eng American Geophysical Union. (Wiley) https://researchonline.ljmu.ac.uk/id/eprint/13197/8/Elevation%20changes%20of%20the%20Fennoscandian%20Ice%20Sheet%20interior%20during%20the%20last%20deglaciation.pdf Lane, TP, Paasche, Ø, Kvisvik, B, Adamson, K, Rodés, Á, Patton, H, Gomez, N, Gheorghiu, D, Bakke, J and Hubbard, A (2020) Elevation changes of the Fennoscandian Ice Sheet interior during the last deglaciation. Geophysical Research Letters, 47 (14). ISSN 0094-8276 doi:10.1029/2020GL088796 cc_by CC-BY GB Physical geography GE Environmental Sciences Article PeerReviewed 2020 ftliverpooljmu https://doi.org/10.1029/2020GL088796 2022-01-09T06:56:48Z The dynamics of ice sheet interiors during the last deglaciation are poorly constrained, hindering evaluation of ice sheet models. We provide direct evidence of Fennoscandian Ice Sheet (FIS) interior behaviour during deglaciation through surface exposure dating. Our results demonstrate early thinning of the FIS, prior to the Younger Dryas (YD, 12.8‐11.7 ka). Interior thinning in central Norway was concurrent with retreat along the coastline, exposing ice‐free mountainous tracts, potentially as early as 20‐15 ka. The FIS then formed moraines in these ice‐free tracts during the YD. This is contrary to current hypotheses advocating a landscape fully covered by cold, inactive ice during this period. Present empirical and model reconstructions fail to capture rapid interior down‐wastage, increasing uncertainties in ice sheet volume estimates and sea level contributions. Article in Journal/Newspaper Fennoscandian Ice Sheet Liverpool John Moores University: LJMU Research Online Norway Geophysical Research Letters 47 14 |
institution |
Open Polar |
collection |
Liverpool John Moores University: LJMU Research Online |
op_collection_id |
ftliverpooljmu |
language |
English |
topic |
GB Physical geography GE Environmental Sciences |
spellingShingle |
GB Physical geography GE Environmental Sciences Lane, TP Paasche, Ø Kvisvik, B Adamson, K Rodés, Á Patton, H Gomez, N Gheorghiu, D Bakke, J Hubbard, A Elevation changes of the Fennoscandian Ice Sheet interior during the last deglaciation |
topic_facet |
GB Physical geography GE Environmental Sciences |
description |
The dynamics of ice sheet interiors during the last deglaciation are poorly constrained, hindering evaluation of ice sheet models. We provide direct evidence of Fennoscandian Ice Sheet (FIS) interior behaviour during deglaciation through surface exposure dating. Our results demonstrate early thinning of the FIS, prior to the Younger Dryas (YD, 12.8‐11.7 ka). Interior thinning in central Norway was concurrent with retreat along the coastline, exposing ice‐free mountainous tracts, potentially as early as 20‐15 ka. The FIS then formed moraines in these ice‐free tracts during the YD. This is contrary to current hypotheses advocating a landscape fully covered by cold, inactive ice during this period. Present empirical and model reconstructions fail to capture rapid interior down‐wastage, increasing uncertainties in ice sheet volume estimates and sea level contributions. |
format |
Article in Journal/Newspaper |
author |
Lane, TP Paasche, Ø Kvisvik, B Adamson, K Rodés, Á Patton, H Gomez, N Gheorghiu, D Bakke, J Hubbard, A |
author_facet |
Lane, TP Paasche, Ø Kvisvik, B Adamson, K Rodés, Á Patton, H Gomez, N Gheorghiu, D Bakke, J Hubbard, A |
author_sort |
Lane, TP |
title |
Elevation changes of the Fennoscandian Ice Sheet interior during the last deglaciation |
title_short |
Elevation changes of the Fennoscandian Ice Sheet interior during the last deglaciation |
title_full |
Elevation changes of the Fennoscandian Ice Sheet interior during the last deglaciation |
title_fullStr |
Elevation changes of the Fennoscandian Ice Sheet interior during the last deglaciation |
title_full_unstemmed |
Elevation changes of the Fennoscandian Ice Sheet interior during the last deglaciation |
title_sort |
elevation changes of the fennoscandian ice sheet interior during the last deglaciation |
publisher |
American Geophysical Union. (Wiley) |
publishDate |
2020 |
url |
http://researchonline.ljmu.ac.uk/id/eprint/13197/ https://researchonline.ljmu.ac.uk/id/eprint/13197/8/Elevation%20changes%20of%20the%20Fennoscandian%20Ice%20Sheet%20interior%20during%20the%20last%20deglaciation.pdf https://doi.org/10.1029/2020GL088796 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Fennoscandian Ice Sheet |
genre_facet |
Fennoscandian Ice Sheet |
op_relation |
https://researchonline.ljmu.ac.uk/id/eprint/13197/8/Elevation%20changes%20of%20the%20Fennoscandian%20Ice%20Sheet%20interior%20during%20the%20last%20deglaciation.pdf Lane, TP, Paasche, Ø, Kvisvik, B, Adamson, K, Rodés, Á, Patton, H, Gomez, N, Gheorghiu, D, Bakke, J and Hubbard, A (2020) Elevation changes of the Fennoscandian Ice Sheet interior during the last deglaciation. Geophysical Research Letters, 47 (14). ISSN 0094-8276 doi:10.1029/2020GL088796 |
op_rights |
cc_by |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2020GL088796 |
container_title |
Geophysical Research Letters |
container_volume |
47 |
container_issue |
14 |
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1765998457105940480 |