Tectonic and climatic drivers of Asian monsoon evolution
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 resolutio...
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ftopenunivgb:oai:oro.open.ac.uk:77392 2023-06-11T04:12:49+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. 2021-06-29 application/pdf https://oro.open.ac.uk/77392/ https://oro.open.ac.uk/77392/1/Thomson%20et%20al%202021.pdf https://oro.open.ac.uk/77392/2/Tomson%20et%20al%202021_supp.pdf https://doi.org/10.1038/s41467-021-24244-z unknown https://oro.open.ac.uk/77392/1/Thomson%20et%20al%202021.pdf https://oro.open.ac.uk/77392/2/Tomson%20et%20al%202021_supp.pdf Thomson, James R.; Holden, Philip B. <http://oro.open.ac.uk/view/person/pbh56.html>; Anand, Pallavi <http://oro.open.ac.uk/view/person/pa2398.html>; Edwards, Neil R. <http://oro.open.ac.uk/view/person/nre29.html>; Porchier, Cécile A. and Harris, Nigel B. W. <http://oro.open.ac.uk/view/person/nbwh2.html> (2021). Tectonic and climatic drivers of Asian monsoon evolution. Nature Communications(12), article no. 4022. Journal Item Public PeerReviewed 2021 ftopenunivgb https://doi.org/10.1038/s41467-021-24244-z 2023-05-28T06:05:45Z 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 CO2 (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 The Open University: Open Research Online (ORO) Indian Nature Communications 12 1 |
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The Open University: Open Research Online (ORO) |
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ftopenunivgb |
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description |
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 CO2 (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. |
format |
Article in Journal/Newspaper |
author |
Thomson, James R. Holden, Philip B. Anand, Pallavi Edwards, Neil R. Porchier, Cécile A. Harris, Nigel B. W. |
spellingShingle |
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 |
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 |
publishDate |
2021 |
url |
https://oro.open.ac.uk/77392/ https://oro.open.ac.uk/77392/1/Thomson%20et%20al%202021.pdf https://oro.open.ac.uk/77392/2/Tomson%20et%20al%202021_supp.pdf https://doi.org/10.1038/s41467-021-24244-z |
geographic |
Indian |
geographic_facet |
Indian |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
https://oro.open.ac.uk/77392/1/Thomson%20et%20al%202021.pdf https://oro.open.ac.uk/77392/2/Tomson%20et%20al%202021_supp.pdf Thomson, James R.; Holden, Philip B. <http://oro.open.ac.uk/view/person/pbh56.html>; Anand, Pallavi <http://oro.open.ac.uk/view/person/pa2398.html>; Edwards, Neil R. <http://oro.open.ac.uk/view/person/nre29.html>; Porchier, Cécile A. and Harris, Nigel B. W. <http://oro.open.ac.uk/view/person/nbwh2.html> (2021). Tectonic and climatic drivers of Asian monsoon evolution. Nature Communications(12), article no. 4022. |
op_doi |
https://doi.org/10.1038/s41467-021-24244-z |
container_title |
Nature Communications |
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12 |
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1 |
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1768388929787002880 |