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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ftunivcam:oai:www.repository.cam.ac.uk:1810/326226 2024-01-28T10:06:31+01:00 Tectonic and climatic drivers of Asian monsoon evolution. Thomson, James R Holden, Philip B Anand, Pallavi Edwards, Neil R Porchier, Cécile A Harris, Nigel BW 2021-08-02T09:05:25Z application/pdf https://www.repository.cam.ac.uk/handle/1810/326226 https://doi.org/10.17863/CAM.73683 eng eng Springer Science and Business Media LLC http://dx.doi.org/10.1038/s41467-021-24244-z Nat Commun https://www.repository.cam.ac.uk/handle/1810/326226 doi:10.17863/CAM.73683 Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ nlmid: 101528555 essn: 2041-1723 37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3702 Climate Change Science Article 2021 ftunivcam https://doi.org/10.17863/CAM.73683 2024-01-04T23:19:37Z 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 Apollo - University of Cambridge Repository Indian |
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Apollo - University of Cambridge Repository |
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language |
English |
topic |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3702 Climate Change Science |
spellingShingle |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3702 Climate Change Science Thomson, James R Holden, Philip B Anand, Pallavi Edwards, Neil R Porchier, Cécile A Harris, Nigel BW Tectonic and climatic drivers of Asian monsoon evolution. |
topic_facet |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3702 Climate Change Science |
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 BW |
author_facet |
Thomson, James R Holden, Philip B Anand, Pallavi Edwards, Neil R Porchier, Cécile A Harris, Nigel BW |
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 |
https://www.repository.cam.ac.uk/handle/1810/326226 https://doi.org/10.17863/CAM.73683 |
geographic |
Indian |
geographic_facet |
Indian |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
nlmid: 101528555 essn: 2041-1723 |
op_relation |
https://www.repository.cam.ac.uk/handle/1810/326226 doi:10.17863/CAM.73683 |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.17863/CAM.73683 |
_version_ |
1789333451749457920 |