Palaeogeographic regulation of glacial events during the Cretaceous supergreenhouse
The historical view of a uniformly warm Cretaceous is being increasingly challenged by the accumulation of new data hinting at the possibility of glacial events, even during the Cenomanian–Turonian (∼95 Myr ago), the warmest interval of the Cretaceous. Here we show that the palaeogeography typifying...
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ftpubmed:oai:pubmedcentral.nih.gov:5036002 2023-05-15T13:45:24+02:00 Palaeogeographic regulation of glacial events during the Cretaceous supergreenhouse Ladant, Jean-Baptiste Donnadieu, Yannick 2016-09-21 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5036002/ http://www.ncbi.nlm.nih.gov/pubmed/27650167 https://doi.org/10.1038/ncomms12771 en eng Nature Publishing Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5036002/ http://www.ncbi.nlm.nih.gov/pubmed/27650167 http://dx.doi.org/10.1038/ncomms12771 Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ CC-BY Article Text 2016 ftpubmed https://doi.org/10.1038/ncomms12771 2016-10-09T00:07:24Z The historical view of a uniformly warm Cretaceous is being increasingly challenged by the accumulation of new data hinting at the possibility of glacial events, even during the Cenomanian–Turonian (∼95 Myr ago), the warmest interval of the Cretaceous. Here we show that the palaeogeography typifying the Cenomanian–Turonian renders the Earth System resilient to glaciation with no perennial ice accumulation occurring under prescribed CO2 levels as low as 420 p.p.m. Conversely, late Aptian (∼115 Myr ago) and Maastrichtian (∼70 Myr ago) continental configurations set the stage for cooler climatic conditions, favouring possible inception of Antarctic ice sheets under CO2 concentrations, respectively, about 400 and 300 p.p.m. higher than for the Cenomanian–Turonian. Our simulations notably emphasize that palaeogeography can crucially impact global climate by modulating the CO2 threshold for ice sheet inception and make the possibility of glacial events during the Cenomanian–Turonian unlikely. Text Antarc* Antarctic Ice Sheet PubMed Central (PMC) Antarctic Nature Communications 7 1 |
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Article Ladant, Jean-Baptiste Donnadieu, Yannick Palaeogeographic regulation of glacial events during the Cretaceous supergreenhouse |
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Article |
description |
The historical view of a uniformly warm Cretaceous is being increasingly challenged by the accumulation of new data hinting at the possibility of glacial events, even during the Cenomanian–Turonian (∼95 Myr ago), the warmest interval of the Cretaceous. Here we show that the palaeogeography typifying the Cenomanian–Turonian renders the Earth System resilient to glaciation with no perennial ice accumulation occurring under prescribed CO2 levels as low as 420 p.p.m. Conversely, late Aptian (∼115 Myr ago) and Maastrichtian (∼70 Myr ago) continental configurations set the stage for cooler climatic conditions, favouring possible inception of Antarctic ice sheets under CO2 concentrations, respectively, about 400 and 300 p.p.m. higher than for the Cenomanian–Turonian. Our simulations notably emphasize that palaeogeography can crucially impact global climate by modulating the CO2 threshold for ice sheet inception and make the possibility of glacial events during the Cenomanian–Turonian unlikely. |
format |
Text |
author |
Ladant, Jean-Baptiste Donnadieu, Yannick |
author_facet |
Ladant, Jean-Baptiste Donnadieu, Yannick |
author_sort |
Ladant, Jean-Baptiste |
title |
Palaeogeographic regulation of glacial events during the Cretaceous supergreenhouse |
title_short |
Palaeogeographic regulation of glacial events during the Cretaceous supergreenhouse |
title_full |
Palaeogeographic regulation of glacial events during the Cretaceous supergreenhouse |
title_fullStr |
Palaeogeographic regulation of glacial events during the Cretaceous supergreenhouse |
title_full_unstemmed |
Palaeogeographic regulation of glacial events during the Cretaceous supergreenhouse |
title_sort |
palaeogeographic regulation of glacial events during the cretaceous supergreenhouse |
publisher |
Nature Publishing Group |
publishDate |
2016 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5036002/ http://www.ncbi.nlm.nih.gov/pubmed/27650167 https://doi.org/10.1038/ncomms12771 |
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Antarctic |
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Antarctic |
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Antarc* Antarctic Ice Sheet |
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Antarc* Antarctic Ice Sheet |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5036002/ http://www.ncbi.nlm.nih.gov/pubmed/27650167 http://dx.doi.org/10.1038/ncomms12771 |
op_rights |
Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
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CC-BY |
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https://doi.org/10.1038/ncomms12771 |
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Nature Communications |
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7 |
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1 |
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