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Dynamic Greenland ice sheet driven by pCO(2) variations across the Pliocene Pleistocene transition

It is generally considered that the perennial glaciation of Greenland lasting several orbital cycles began around 2.7 Ma along with the intensification of Northern Hemisphere glaciation (NHG). Both data and model studies have demonstrated that a decline in atmospheric pCO(2) was instrumental in esta...

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Autores principales: Tan, Ning, Ladant, Jean-Baptiste, Ramstein, Gilles, Dumas, Christophe, Bachem, Paul, Jansen, Eystein
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6232173/
https://www.ncbi.nlm.nih.gov/pubmed/30420596
http://dx.doi.org/10.1038/s41467-018-07206-w
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author Tan, Ning
Ladant, Jean-Baptiste
Ramstein, Gilles
Dumas, Christophe
Bachem, Paul
Jansen, Eystein
author_facet Tan, Ning
Ladant, Jean-Baptiste
Ramstein, Gilles
Dumas, Christophe
Bachem, Paul
Jansen, Eystein
author_sort Tan, Ning
collection PubMed
description It is generally considered that the perennial glaciation of Greenland lasting several orbital cycles began around 2.7 Ma along with the intensification of Northern Hemisphere glaciation (NHG). Both data and model studies have demonstrated that a decline in atmospheric pCO(2) was instrumental in establishing a perennial Greenland ice sheet (GrIS), yet models have generally used simplistic pCO(2) constraints rather than data-inferred pCO(2) evolution. Here, using a method designed for the long-term coupling of climate and cryosphere models and pCO(2) scenarios from different studies, we highlight the pivotal role of pCO(2) on the GrIS expansion across the Plio-Pleistocene Transition (PPT, 3.0–2.5 Ma), in particular in the range between 280 and 320 ppm. Good qualitative agreement is obtained between various IRD reconstructions and some of the possible evolutions of the GrIS simulated by our model. Our results underline the dynamism of the GrIS waxing and waning under pCO(2) levels similar to or lower than today, which supports recent evidence of a dynamic GrIS during the Plio-Pleistocene.
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spelling pubmed-62321732018-11-14 Dynamic Greenland ice sheet driven by pCO(2) variations across the Pliocene Pleistocene transition Tan, Ning Ladant, Jean-Baptiste Ramstein, Gilles Dumas, Christophe Bachem, Paul Jansen, Eystein Nat Commun Article It is generally considered that the perennial glaciation of Greenland lasting several orbital cycles began around 2.7 Ma along with the intensification of Northern Hemisphere glaciation (NHG). Both data and model studies have demonstrated that a decline in atmospheric pCO(2) was instrumental in establishing a perennial Greenland ice sheet (GrIS), yet models have generally used simplistic pCO(2) constraints rather than data-inferred pCO(2) evolution. Here, using a method designed for the long-term coupling of climate and cryosphere models and pCO(2) scenarios from different studies, we highlight the pivotal role of pCO(2) on the GrIS expansion across the Plio-Pleistocene Transition (PPT, 3.0–2.5 Ma), in particular in the range between 280 and 320 ppm. Good qualitative agreement is obtained between various IRD reconstructions and some of the possible evolutions of the GrIS simulated by our model. Our results underline the dynamism of the GrIS waxing and waning under pCO(2) levels similar to or lower than today, which supports recent evidence of a dynamic GrIS during the Plio-Pleistocene. Nature Publishing Group UK 2018-11-12 /pmc/articles/PMC6232173/ /pubmed/30420596 http://dx.doi.org/10.1038/s41467-018-07206-w Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Tan, Ning
Ladant, Jean-Baptiste
Ramstein, Gilles
Dumas, Christophe
Bachem, Paul
Jansen, Eystein
Dynamic Greenland ice sheet driven by pCO(2) variations across the Pliocene Pleistocene transition
title Dynamic Greenland ice sheet driven by pCO(2) variations across the Pliocene Pleistocene transition
title_full Dynamic Greenland ice sheet driven by pCO(2) variations across the Pliocene Pleistocene transition
title_fullStr Dynamic Greenland ice sheet driven by pCO(2) variations across the Pliocene Pleistocene transition
title_full_unstemmed Dynamic Greenland ice sheet driven by pCO(2) variations across the Pliocene Pleistocene transition
title_short Dynamic Greenland ice sheet driven by pCO(2) variations across the Pliocene Pleistocene transition
title_sort dynamic greenland ice sheet driven by pco(2) variations across the pliocene pleistocene transition
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6232173/
https://www.ncbi.nlm.nih.gov/pubmed/30420596
http://dx.doi.org/10.1038/s41467-018-07206-w
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