Tectonic and climatic drivers of Asian monsoon evolution
Abstract Asian Monsoon rainfall supports the livelihood of billions of people, yet the relative importance of different drivers remains an issue of great debate. Here, we present 30 million-year model-based reconstructions of Indian summer monsoon and South East Asian monsoon rainfall at millennial...
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crspringernat:10.1038/s41467-021-24244-z 2023-05-15T16:40:54+02:00 Tectonic and climatic drivers of Asian monsoon evolution Thomson, James R. Holden, Philip B. Anand, Pallavi Edwards, Neil R. Porchier, Cécile A. Harris, Nigel B. W. RCUK | Natural Environment Research Council 2021 http://dx.doi.org/10.1038/s41467-021-24244-z http://www.nature.com/articles/s41467-021-24244-z.pdf http://www.nature.com/articles/s41467-021-24244-z en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Nature Communications volume 12, issue 1 ISSN 2041-1723 General Physics and Astronomy General Biochemistry, Genetics and Molecular Biology General Chemistry journal-article 2021 crspringernat https://doi.org/10.1038/s41467-021-24244-z 2022-01-04T13:25:03Z Abstract Asian Monsoon rainfall supports the livelihood of billions of people, yet the relative importance of different drivers remains an issue of great debate. Here, we present 30 million-year model-based reconstructions of Indian summer monsoon and South East Asian monsoon rainfall at millennial resolution. We show that precession is the dominant direct driver of orbital variability, although variability on obliquity timescales is driven through the ice sheets. Orographic development dominated the evolution of the South East Asian monsoon, but Indian summer monsoon evolution involved a complex mix of contributions from orography (39%), precession (25%), atmospheric CO 2 (21%), ice-sheet state (5%) and ocean gateways (5%). Prior to 15 Ma, the Indian summer monsoon was broadly stable, albeit with substantial orbital variability. From 15 Ma to 5 Ma, strengthening was driven by a combination of orography and glaciation, while closure of the Panama gateway provided the prerequisite for the modern Indian summer monsoon state through a strengthened Atlantic meridional overturning circulation. Article in Journal/Newspaper Ice Sheet Springer Nature (via Crossref) Indian Nature Communications 12 1 |
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Springer Nature (via Crossref) |
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English |
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General Physics and Astronomy General Biochemistry, Genetics and Molecular Biology General Chemistry |
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General Physics and Astronomy General Biochemistry, Genetics and Molecular Biology General Chemistry Thomson, James R. Holden, Philip B. Anand, Pallavi Edwards, Neil R. Porchier, Cécile A. Harris, Nigel B. W. Tectonic and climatic drivers of Asian monsoon evolution |
topic_facet |
General Physics and Astronomy General Biochemistry, Genetics and Molecular Biology General Chemistry |
description |
Abstract Asian Monsoon rainfall supports the livelihood of billions of people, yet the relative importance of different drivers remains an issue of great debate. Here, we present 30 million-year model-based reconstructions of Indian summer monsoon and South East Asian monsoon rainfall at millennial resolution. We show that precession is the dominant direct driver of orbital variability, although variability on obliquity timescales is driven through the ice sheets. Orographic development dominated the evolution of the South East Asian monsoon, but Indian summer monsoon evolution involved a complex mix of contributions from orography (39%), precession (25%), atmospheric CO 2 (21%), ice-sheet state (5%) and ocean gateways (5%). Prior to 15 Ma, the Indian summer monsoon was broadly stable, albeit with substantial orbital variability. From 15 Ma to 5 Ma, strengthening was driven by a combination of orography and glaciation, while closure of the Panama gateway provided the prerequisite for the modern Indian summer monsoon state through a strengthened Atlantic meridional overturning circulation. |
author2 |
RCUK | Natural Environment Research Council |
format |
Article in Journal/Newspaper |
author |
Thomson, James R. Holden, Philip B. Anand, Pallavi Edwards, Neil R. Porchier, Cécile A. Harris, Nigel B. W. |
author_facet |
Thomson, James R. Holden, Philip B. Anand, Pallavi Edwards, Neil R. Porchier, Cécile A. Harris, Nigel B. W. |
author_sort |
Thomson, James R. |
title |
Tectonic and climatic drivers of Asian monsoon evolution |
title_short |
Tectonic and climatic drivers of Asian monsoon evolution |
title_full |
Tectonic and climatic drivers of Asian monsoon evolution |
title_fullStr |
Tectonic and climatic drivers of Asian monsoon evolution |
title_full_unstemmed |
Tectonic and climatic drivers of Asian monsoon evolution |
title_sort |
tectonic and climatic drivers of asian monsoon evolution |
publisher |
Springer Science and Business Media LLC |
publishDate |
2021 |
url |
http://dx.doi.org/10.1038/s41467-021-24244-z http://www.nature.com/articles/s41467-021-24244-z.pdf http://www.nature.com/articles/s41467-021-24244-z |
geographic |
Indian |
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Indian |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Nature Communications volume 12, issue 1 ISSN 2041-1723 |
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https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
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CC-BY |
op_doi |
https://doi.org/10.1038/s41467-021-24244-z |
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Nature Communications |
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12 |
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1 |
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1766031337753411584 |