On the causes of Arctic sea ice in the warm Early Pliocene
Source at https://doi.org/10.1038/s41598-018-37047-y . Scattered and indirect evidence suggests that sea ice occurred as far south as the Iceland Sea during the Early Pliocene, when the global climate was warmer than present. However, conclusive evidence as well as potential mechanisms governing sea...
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ftunivtroemsoe:oai:munin.uit.no:10037/15190 2023-05-15T14:27:40+02:00 On the causes of Arctic sea ice in the warm Early Pliocene Clotten, Caroline Stein, Rüdiger Fahl, Kirsten Schreck, Michael Risebrobakken, Bjørg De Schepper, Stijn 2019-01-30 https://hdl.handle.net/10037/15190 eng eng Nature Research Scientific Reports info:eu-repo/grantAgreement/RCN/POLARPROG/229819/Norway/Pliocene East Greenland Current and Sea Ice Evolution// info:eu-repo/grantAgreement/RCN/FRINATEK/221712/Norway/Ocean Controls on high-latitude Climate sensitivity - a Pliocene case study// Clotten, C., Stein, R., Fahl, K., Schreck, M., Risebrobakken, B. & De Schepper, S. (2019). On the causes of Arctic sea ice in the warm Early Pliocene. Scientific Reports, 9 (989). https://doi.org/10.1038/s41598-018-37047-y FRIDAID 1668794 10.1038/s41598-018-37047-y. 2045-2322 https://hdl.handle.net/10037/15190 openAccess VDP::Mathematics and natural science: 400::Geosciences: 450::Meteorology: 453 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Meteorologi: 453 Journal article Tidsskriftartikkel Peer reviewed 2019 ftunivtroemsoe 2021-06-25T17:56:23Z Source at https://doi.org/10.1038/s41598-018-37047-y . Scattered and indirect evidence suggests that sea ice occurred as far south as the Iceland Sea during the Early Pliocene, when the global climate was warmer than present. However, conclusive evidence as well as potential mechanisms governing sea ice occurrence outside the Arctic Ocean during a time with elevated greenhouse gas concentrations are still elusive. Here we present a suite of organic biomarkers and palynological records from the Iceland Sea and Yermak Plateau. We show that sea ice appeared as early as ~4.5 Ma in the Iceland Sea. The sea ice either occurred seasonally or was transported southward with the East Greenland Current. The Yermak Plateau mostly remained free of sea ice and was influenced dominantly by Atlantic water. From ~4.0 Ma, occurrence of extended sea ice conditions at both the Yermak Plateau and Iceland Sea document a substantial expansion of sea ice in the Arctic. The expansion occurred contemporaneous with increased northward heat and moisture transport in the North Atlantic region, which likely led to a fresher Arctic Ocean that favors sea ice formation. This extensive sea ice cover along the pathway of the East Greenland Current gradually isolated Greenland from warmer Atlantic water in the Late Pliocene, providing a positive feedback for ice sheet expansion in Greenland. Article in Journal/Newspaper Arctic Arctic Arctic Ocean East Greenland east greenland current Greenland Ice Sheet Iceland North Atlantic Sea ice Yermak plateau University of Tromsø: Munin Open Research Archive Arctic Arctic Ocean Greenland Yermak Plateau ENVELOPE(5.000,5.000,81.250,81.250) Scientific Reports 9 1 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Geosciences: 450::Meteorology: 453 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Meteorologi: 453 |
spellingShingle |
VDP::Mathematics and natural science: 400::Geosciences: 450::Meteorology: 453 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Meteorologi: 453 Clotten, Caroline Stein, Rüdiger Fahl, Kirsten Schreck, Michael Risebrobakken, Bjørg De Schepper, Stijn On the causes of Arctic sea ice in the warm Early Pliocene |
topic_facet |
VDP::Mathematics and natural science: 400::Geosciences: 450::Meteorology: 453 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Meteorologi: 453 |
description |
Source at https://doi.org/10.1038/s41598-018-37047-y . Scattered and indirect evidence suggests that sea ice occurred as far south as the Iceland Sea during the Early Pliocene, when the global climate was warmer than present. However, conclusive evidence as well as potential mechanisms governing sea ice occurrence outside the Arctic Ocean during a time with elevated greenhouse gas concentrations are still elusive. Here we present a suite of organic biomarkers and palynological records from the Iceland Sea and Yermak Plateau. We show that sea ice appeared as early as ~4.5 Ma in the Iceland Sea. The sea ice either occurred seasonally or was transported southward with the East Greenland Current. The Yermak Plateau mostly remained free of sea ice and was influenced dominantly by Atlantic water. From ~4.0 Ma, occurrence of extended sea ice conditions at both the Yermak Plateau and Iceland Sea document a substantial expansion of sea ice in the Arctic. The expansion occurred contemporaneous with increased northward heat and moisture transport in the North Atlantic region, which likely led to a fresher Arctic Ocean that favors sea ice formation. This extensive sea ice cover along the pathway of the East Greenland Current gradually isolated Greenland from warmer Atlantic water in the Late Pliocene, providing a positive feedback for ice sheet expansion in Greenland. |
format |
Article in Journal/Newspaper |
author |
Clotten, Caroline Stein, Rüdiger Fahl, Kirsten Schreck, Michael Risebrobakken, Bjørg De Schepper, Stijn |
author_facet |
Clotten, Caroline Stein, Rüdiger Fahl, Kirsten Schreck, Michael Risebrobakken, Bjørg De Schepper, Stijn |
author_sort |
Clotten, Caroline |
title |
On the causes of Arctic sea ice in the warm Early Pliocene |
title_short |
On the causes of Arctic sea ice in the warm Early Pliocene |
title_full |
On the causes of Arctic sea ice in the warm Early Pliocene |
title_fullStr |
On the causes of Arctic sea ice in the warm Early Pliocene |
title_full_unstemmed |
On the causes of Arctic sea ice in the warm Early Pliocene |
title_sort |
on the causes of arctic sea ice in the warm early pliocene |
publisher |
Nature Research |
publishDate |
2019 |
url |
https://hdl.handle.net/10037/15190 |
long_lat |
ENVELOPE(5.000,5.000,81.250,81.250) |
geographic |
Arctic Arctic Ocean Greenland Yermak Plateau |
geographic_facet |
Arctic Arctic Ocean Greenland Yermak Plateau |
genre |
Arctic Arctic Arctic Ocean East Greenland east greenland current Greenland Ice Sheet Iceland North Atlantic Sea ice Yermak plateau |
genre_facet |
Arctic Arctic Arctic Ocean East Greenland east greenland current Greenland Ice Sheet Iceland North Atlantic Sea ice Yermak plateau |
op_relation |
Scientific Reports info:eu-repo/grantAgreement/RCN/POLARPROG/229819/Norway/Pliocene East Greenland Current and Sea Ice Evolution// info:eu-repo/grantAgreement/RCN/FRINATEK/221712/Norway/Ocean Controls on high-latitude Climate sensitivity - a Pliocene case study// Clotten, C., Stein, R., Fahl, K., Schreck, M., Risebrobakken, B. & De Schepper, S. (2019). On the causes of Arctic sea ice in the warm Early Pliocene. Scientific Reports, 9 (989). https://doi.org/10.1038/s41598-018-37047-y FRIDAID 1668794 10.1038/s41598-018-37047-y. 2045-2322 https://hdl.handle.net/10037/15190 |
op_rights |
openAccess |
container_title |
Scientific Reports |
container_volume |
9 |
container_issue |
1 |
_version_ |
1766301506098692096 |