On the causes of Arctic sea ice in the warm Early Pliocene
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...
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ftawi:oai:epic.awi.de:49040 2024-09-15T17:51:16+00:00 On the causes of Arctic sea ice in the warm Early Pliocene Clotten, Caroline Stein, Rüdiger Fahl, Kirsten Schreck, Michael Risebrobakken, Björg De Schepper, Stijn 2019-01-01 https://epic.awi.de/id/eprint/49040/ https://hdl.handle.net/10013/epic.db215722-6f7d-4830-b526-9e0cfaf80782 unknown Clotten, C. , Stein, R. orcid:0000-0002-4453-9564 , Fahl, K. orcid:0000-0001-9317-4656 , Schreck, M. , Risebrobakken, B. and De Schepper, S. (2019) On the causes of Arctic sea ice in the warm Early Pliocene , Nature Scientific Report, 9 (1), p. 989 . doi:10.1038/s41598-018-37047-y <https://doi.org/10.1038/s41598-018-37047-y> , hdl:10013/epic.db215722-6f7d-4830-b526-9e0cfaf80782 EPIC3Nature Scientific Report, 9(1), pp. 989 Article isiRev 2019 ftawi https://doi.org/10.1038/s41598-018-37047-y 2024-06-24T04:21:00Z 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 Ocean East Greenland east greenland current Greenland Ice Sheet Iceland North Atlantic Sea ice Yermak plateau Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Scientific Reports 9 1 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
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, Björg De Schepper, Stijn |
spellingShingle |
Clotten, Caroline Stein, Rüdiger Fahl, Kirsten Schreck, Michael Risebrobakken, Björg De Schepper, Stijn On the causes of Arctic sea ice in the warm Early Pliocene |
author_facet |
Clotten, Caroline Stein, Rüdiger Fahl, Kirsten Schreck, Michael Risebrobakken, Björg 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 |
publishDate |
2019 |
url |
https://epic.awi.de/id/eprint/49040/ https://hdl.handle.net/10013/epic.db215722-6f7d-4830-b526-9e0cfaf80782 |
genre |
Arctic Arctic Ocean East Greenland east greenland current Greenland Ice Sheet Iceland North Atlantic Sea ice Yermak plateau |
genre_facet |
Arctic Arctic Ocean East Greenland east greenland current Greenland Ice Sheet Iceland North Atlantic Sea ice Yermak plateau |
op_source |
EPIC3Nature Scientific Report, 9(1), pp. 989 |
op_relation |
Clotten, C. , Stein, R. orcid:0000-0002-4453-9564 , Fahl, K. orcid:0000-0001-9317-4656 , Schreck, M. , Risebrobakken, B. and De Schepper, S. (2019) On the causes of Arctic sea ice in the warm Early Pliocene , Nature Scientific Report, 9 (1), p. 989 . doi:10.1038/s41598-018-37047-y <https://doi.org/10.1038/s41598-018-37047-y> , hdl:10013/epic.db215722-6f7d-4830-b526-9e0cfaf80782 |
op_doi |
https://doi.org/10.1038/s41598-018-37047-y |
container_title |
Scientific Reports |
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9 |
container_issue |
1 |
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1810293123854630912 |