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Amplified North Atlantic warming in the late Pliocene by changes in Arctic gateways
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2017
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Source: Geophysical Research Letters, 44(2), 957-964
[PDF-4.90 MB]
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Journal Title:Geophysical Research Letters
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Description:Under previous reconstructions of late Pliocene boundary conditions, climate models have failed to reproduce the warm sea surface temperatures reconstructed in the North Atlantic. Using areconstruction of mid-Piacenzian paleogeography that has the Bering Strait and Canadian Arctic Archipelago Straits closed, however, improves the simulation of the proxy-indicated warm sea surface temperatures in the North Atlantic in the Community Climate System Model. We find that the closure of these small Arctic gateways strengthens the Atlantic Meridional Overturning Circulation, by inhibiting freshwater transport from the Paci fic to the Arctic Ocean and from the Arctic Ocean to the Labrador Sea, leading to warmer sea surface temperatures in the North Atlantic. This indicates that the state of the Arctic gateways may in fluence
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Source:Geophysical Research Letters, 44(2), 957-964
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DOI:
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ISSN:0094-8276;1944-8007;
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Rights Information:Other
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