Northern Hemisphere Glaciation during the Globally Warm Early Late Pliocene
The early Late Pliocene (3.6 to ∼3.0 million years ago) is the last extended interval in Earth's history when atmospheric CO2 concentrations were comparable to today's and global climate was warmer. Yet a severe global glaciation during marine isotope stage (MIS) M2 interrupted this phase...
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ftpubmed:oai:pubmedcentral.nih.gov:3861316 2023-05-15T17:25:16+02:00 Northern Hemisphere Glaciation during the Globally Warm Early Late Pliocene De Schepper, Stijn Groeneveld, Jeroen Naafs, B. David A Van Renterghem, Cédéric Hennissen, Jan Head, Martin J. Louwye, Stephen Fabian, Karl 2013-12-12 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3861316 http://www.ncbi.nlm.nih.gov/pubmed/24349081 https://doi.org/10.1371/journal.pone.0081508 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3861316 http://www.ncbi.nlm.nih.gov/pubmed/24349081 http://dx.doi.org/10.1371/journal.pone.0081508 http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. CC-BY Research Article Text 2013 ftpubmed https://doi.org/10.1371/journal.pone.0081508 2013-12-22T01:42:44Z The early Late Pliocene (3.6 to ∼3.0 million years ago) is the last extended interval in Earth's history when atmospheric CO2 concentrations were comparable to today's and global climate was warmer. Yet a severe global glaciation during marine isotope stage (MIS) M2 interrupted this phase of global warmth ∼3.30 million years ago, and is seen as a premature attempt of the climate system to establish an ice-age world. Here we propose a conceptual model for the glaciation and deglaciation of MIS M2 based on geochemical and palynological records from five marine sediment cores along a Caribbean to eastern North Atlantic transect. Our records show that increased Pacific-to-Atlantic flow via the Central American Seaway weakened the North Atlantic Current and attendant northward heat transport prior to MIS M2. The consequent cooling of the northern high latitude oceans permitted expansion of the continental ice sheets during MIS M2, despite near-modern atmospheric CO2 concentrations. Sea level drop during this glaciation halted the inflow of Pacific water to the Atlantic via the Central American Seaway, allowing the build-up of a Caribbean Warm Pool. Once this warm pool was large enough, the Gulf Stream–North Atlantic Current system was reinvigorated, leading to significant northward heat transport that terminated the glaciation. Before and after MIS M2, heat transport via the North Atlantic Current was crucial in maintaining warm climates comparable to those predicted for the end of this century. Text north atlantic current North Atlantic PubMed Central (PMC) Pacific PLoS ONE 8 12 e81508 |
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Research Article De Schepper, Stijn Groeneveld, Jeroen Naafs, B. David A Van Renterghem, Cédéric Hennissen, Jan Head, Martin J. Louwye, Stephen Fabian, Karl Northern Hemisphere Glaciation during the Globally Warm Early Late Pliocene |
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Research Article |
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The early Late Pliocene (3.6 to ∼3.0 million years ago) is the last extended interval in Earth's history when atmospheric CO2 concentrations were comparable to today's and global climate was warmer. Yet a severe global glaciation during marine isotope stage (MIS) M2 interrupted this phase of global warmth ∼3.30 million years ago, and is seen as a premature attempt of the climate system to establish an ice-age world. Here we propose a conceptual model for the glaciation and deglaciation of MIS M2 based on geochemical and palynological records from five marine sediment cores along a Caribbean to eastern North Atlantic transect. Our records show that increased Pacific-to-Atlantic flow via the Central American Seaway weakened the North Atlantic Current and attendant northward heat transport prior to MIS M2. The consequent cooling of the northern high latitude oceans permitted expansion of the continental ice sheets during MIS M2, despite near-modern atmospheric CO2 concentrations. Sea level drop during this glaciation halted the inflow of Pacific water to the Atlantic via the Central American Seaway, allowing the build-up of a Caribbean Warm Pool. Once this warm pool was large enough, the Gulf Stream–North Atlantic Current system was reinvigorated, leading to significant northward heat transport that terminated the glaciation. Before and after MIS M2, heat transport via the North Atlantic Current was crucial in maintaining warm climates comparable to those predicted for the end of this century. |
format |
Text |
author |
De Schepper, Stijn Groeneveld, Jeroen Naafs, B. David A Van Renterghem, Cédéric Hennissen, Jan Head, Martin J. Louwye, Stephen Fabian, Karl |
author_facet |
De Schepper, Stijn Groeneveld, Jeroen Naafs, B. David A Van Renterghem, Cédéric Hennissen, Jan Head, Martin J. Louwye, Stephen Fabian, Karl |
author_sort |
De Schepper, Stijn |
title |
Northern Hemisphere Glaciation during the Globally Warm Early Late Pliocene |
title_short |
Northern Hemisphere Glaciation during the Globally Warm Early Late Pliocene |
title_full |
Northern Hemisphere Glaciation during the Globally Warm Early Late Pliocene |
title_fullStr |
Northern Hemisphere Glaciation during the Globally Warm Early Late Pliocene |
title_full_unstemmed |
Northern Hemisphere Glaciation during the Globally Warm Early Late Pliocene |
title_sort |
northern hemisphere glaciation during the globally warm early late pliocene |
publisher |
Public Library of Science |
publishDate |
2013 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3861316 http://www.ncbi.nlm.nih.gov/pubmed/24349081 https://doi.org/10.1371/journal.pone.0081508 |
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Pacific |
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Pacific |
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north atlantic current North Atlantic |
genre_facet |
north atlantic current North Atlantic |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3861316 http://www.ncbi.nlm.nih.gov/pubmed/24349081 http://dx.doi.org/10.1371/journal.pone.0081508 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
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CC-BY |
op_doi |
https://doi.org/10.1371/journal.pone.0081508 |
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PLoS ONE |
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8 |
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12 |
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