Pacific freshening drives Pliocene cooling and Asian monsoon intensification
The monsoon is a fundamental component of Earth's climate. The Pliocene warm period is characterized by long-term global cooling yet concurrent monsoon dynamics are poorly known. Here we present the first fully quantified and calibrated reconstructions of separate Pliocene air temperature and E...
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ftpubmed:oai:pubmedcentral.nih.gov:4073123 2023-05-15T18:18:19+02:00 Pacific freshening drives Pliocene cooling and Asian monsoon intensification Nie, Junsheng Stevens, Thomas Song, Yougui King, John W. Zhang, Rui Ji, Shunchuan Gong, Lisha Cares, Danielle 2014-06-27 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4073123 https://doi.org/10.1038/srep05474 en eng Nature Publishing Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://dx.doi.org/10.1038/srep05474 Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-sa/4.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 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 in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/4.0/ CC-BY-NC-SA Article Text 2014 ftpubmed https://doi.org/10.1038/srep05474 2014-06-29T01:05:05Z The monsoon is a fundamental component of Earth's climate. The Pliocene warm period is characterized by long-term global cooling yet concurrent monsoon dynamics are poorly known. Here we present the first fully quantified and calibrated reconstructions of separate Pliocene air temperature and East Asian summer monsoon precipitation histories on the Chinese Loess Plateau through joint analysis of loess/red clay magnetic parameters with different sensitivities to air temperature and precipitation. East Asian summer monsoon precipitation shows an intensified trend, paradoxically at the same time that climate cooled. We propose a hitherto unrecognized feedback where persistently intensified East Asian summer monsoon during the late Pliocene, triggered by the gradual closure of the Panama Seaway, reinforced late Pliocene Pacific freshening, sea-ice development and ice volume increase, culminating in initiation of the extensive Northern Hemisphere glaciations of the Quaternary Ice Age. This feedback mechanism represents a fundamental reinterpretation of the origin of the Quaternary glaciations and the impact of the monsoon. Text Sea ice PubMed Central (PMC) Pacific Scientific Reports 4 1 |
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Article Nie, Junsheng Stevens, Thomas Song, Yougui King, John W. Zhang, Rui Ji, Shunchuan Gong, Lisha Cares, Danielle Pacific freshening drives Pliocene cooling and Asian monsoon intensification |
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Article |
description |
The monsoon is a fundamental component of Earth's climate. The Pliocene warm period is characterized by long-term global cooling yet concurrent monsoon dynamics are poorly known. Here we present the first fully quantified and calibrated reconstructions of separate Pliocene air temperature and East Asian summer monsoon precipitation histories on the Chinese Loess Plateau through joint analysis of loess/red clay magnetic parameters with different sensitivities to air temperature and precipitation. East Asian summer monsoon precipitation shows an intensified trend, paradoxically at the same time that climate cooled. We propose a hitherto unrecognized feedback where persistently intensified East Asian summer monsoon during the late Pliocene, triggered by the gradual closure of the Panama Seaway, reinforced late Pliocene Pacific freshening, sea-ice development and ice volume increase, culminating in initiation of the extensive Northern Hemisphere glaciations of the Quaternary Ice Age. This feedback mechanism represents a fundamental reinterpretation of the origin of the Quaternary glaciations and the impact of the monsoon. |
format |
Text |
author |
Nie, Junsheng Stevens, Thomas Song, Yougui King, John W. Zhang, Rui Ji, Shunchuan Gong, Lisha Cares, Danielle |
author_facet |
Nie, Junsheng Stevens, Thomas Song, Yougui King, John W. Zhang, Rui Ji, Shunchuan Gong, Lisha Cares, Danielle |
author_sort |
Nie, Junsheng |
title |
Pacific freshening drives Pliocene cooling and Asian monsoon intensification |
title_short |
Pacific freshening drives Pliocene cooling and Asian monsoon intensification |
title_full |
Pacific freshening drives Pliocene cooling and Asian monsoon intensification |
title_fullStr |
Pacific freshening drives Pliocene cooling and Asian monsoon intensification |
title_full_unstemmed |
Pacific freshening drives Pliocene cooling and Asian monsoon intensification |
title_sort |
pacific freshening drives pliocene cooling and asian monsoon intensification |
publisher |
Nature Publishing Group |
publishDate |
2014 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4073123 https://doi.org/10.1038/srep05474 |
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Pacific |
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Pacific |
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Sea ice |
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Sea ice |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://dx.doi.org/10.1038/srep05474 |
op_rights |
Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-sa/4.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 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 in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/4.0/ |
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CC-BY-NC-SA |
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https://doi.org/10.1038/srep05474 |
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Scientific Reports |
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