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Elevation changes of the Fennoscandian Ice Sheet interior during the last deglaciation

Permanent link
https://hdl.handle.net/10037/19026
DOI
https://doi.org/10.1029/2020GL088796
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Date
2020-06-20
Type
Journal article
Tidsskriftartikkel
Peer reviewed

Author
Lane, T.P.; Paasche, Øyvind; Kvisvik, B.; Adamson, K.R.; Rodés, Á.; Patton, Henry; Gomez, N.; Gheorghiu, D.; Bakke, J.; Hubbard, Alun Lloyd
Abstract
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
Publisher
Wiley
Citation
Lane, Paasche Ø, Kvisvik, Adamson K, Rodés, Patton H, Gomez, Gheorghiu D, Bakke J, Hubbard AL. Elevation changes of the Fennoscandian Ice Sheet interior during the last deglaciation. Geophysical Research Letters. 2020
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