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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Autores principales:	Stijn De Schepper, Jeroen Groeneveld, B David A Naafs, Cédéric Van Renterghem, Jan Hennissen, Martin J Head, Stephen Louwye, Karl Fabian
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1ed9bd516e97498ba53c8fdbdc17a04d
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spelling	oai:doaj.org-article:1ed9bd516e97498ba53c8fdbdc17a04d2021-11-18T08:42:17ZNorthern hemisphere glaciation during the globally warm early Late Pliocene.1932-620310.1371/journal.pone.0081508https://doaj.org/article/1ed9bd516e97498ba53c8fdbdc17a04d2013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/24349081/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203The 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.Stijn De SchepperJeroen GroeneveldB David A NaafsCédéric Van RenterghemJan HennissenMartin J HeadStephen LouwyeKarl FabianPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 12, p e81508 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Stijn De Schepper Jeroen Groeneveld B David A Naafs Cédéric Van Renterghem Jan Hennissen Martin J Head Stephen Louwye Karl Fabian Northern hemisphere glaciation during the globally warm early Late Pliocene.
description	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	article
author	Stijn De Schepper Jeroen Groeneveld B David A Naafs Cédéric Van Renterghem Jan Hennissen Martin J Head Stephen Louwye Karl Fabian
author_facet	Stijn De Schepper Jeroen Groeneveld B David A Naafs Cédéric Van Renterghem Jan Hennissen Martin J Head Stephen Louwye Karl Fabian
author_sort	Stijn De Schepper
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 (PLoS)
publishDate	2013
url	https://doaj.org/article/1ed9bd516e97498ba53c8fdbdc17a04d
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Northern hemisphere glaciation during the globally warm early Late Pliocene.

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