North Atlantic cooling triggered a zonal mode over the Indian Ocean during Heinrich Stadial 1 ...
Abrupt changes in the Atlantic meridional overturning circulation (AMOC) are thought to affect tropical hydroclimate through adjustment of the latitudinal position of the intertropical convergence zone (ITCZ). Heinrich Stadial 1 (HS1) involves the largest AMOC reduction in recent geological time; ho...
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Online Access: | https://dx.doi.org/10.3929/ethz-b-000591867 http://hdl.handle.net/20.500.11850/591867 |
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ftdatacite:10.3929/ethz-b-000591867 2024-04-28T08:30:30+00:00 North Atlantic cooling triggered a zonal mode over the Indian Ocean during Heinrich Stadial 1 ... Du, Xiaojing Russell, James M. Liu, Zhengyu Otto-Bliesner, Bette L. Oppo, Delia W. Mohtadi, Mahyar Zhu, Chenyu Galy, Valier V. Schefuß, Enno Yan, Yan Rosenthal, Yair Dubois, Nathalie Arbuszewski, Jennifer Gao, Yu 2023 application/pdf https://dx.doi.org/10.3929/ethz-b-000591867 http://hdl.handle.net/20.500.11850/591867 en eng ETH Zurich article-journal Text ScholarlyArticle Journal Article 2023 ftdatacite https://doi.org/10.3929/ethz-b-000591867 2024-04-02T12:32:08Z Abrupt changes in the Atlantic meridional overturning circulation (AMOC) are thought to affect tropical hydroclimate through adjustment of the latitudinal position of the intertropical convergence zone (ITCZ). Heinrich Stadial 1 (HS1) involves the largest AMOC reduction in recent geological time; however, over the tropical Indian Ocean (IO), proxy records suggest zonal anomalies featuring intense, widespread drought in tropical East Africa versus generally wet but heterogeneous conditions in the Maritime Continent. Here, we synthesize proxy data and an isotope-enabled transient deglacial simulation and show that the southward ITCZ shift over the eastern IO during HS1 strengthens IO Walker circulation, triggering an east-west precipitation dipole across the basin. This dipole reverses the zonal precipitation anomalies caused by the exposed Sunda and Sahul shelves due to glacial lower sea level. Our study illustrates how zonal modes of atmosphere-ocean circulation can amplify or reverse global climate ... : Science Advances, 9 (1) ... Article in Journal/Newspaper North Atlantic DataCite Metadata Store (German National Library of Science and Technology) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
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ftdatacite |
language |
English |
description |
Abrupt changes in the Atlantic meridional overturning circulation (AMOC) are thought to affect tropical hydroclimate through adjustment of the latitudinal position of the intertropical convergence zone (ITCZ). Heinrich Stadial 1 (HS1) involves the largest AMOC reduction in recent geological time; however, over the tropical Indian Ocean (IO), proxy records suggest zonal anomalies featuring intense, widespread drought in tropical East Africa versus generally wet but heterogeneous conditions in the Maritime Continent. Here, we synthesize proxy data and an isotope-enabled transient deglacial simulation and show that the southward ITCZ shift over the eastern IO during HS1 strengthens IO Walker circulation, triggering an east-west precipitation dipole across the basin. This dipole reverses the zonal precipitation anomalies caused by the exposed Sunda and Sahul shelves due to glacial lower sea level. Our study illustrates how zonal modes of atmosphere-ocean circulation can amplify or reverse global climate ... : Science Advances, 9 (1) ... |
format |
Article in Journal/Newspaper |
author |
Du, Xiaojing Russell, James M. Liu, Zhengyu Otto-Bliesner, Bette L. Oppo, Delia W. Mohtadi, Mahyar Zhu, Chenyu Galy, Valier V. Schefuß, Enno Yan, Yan Rosenthal, Yair Dubois, Nathalie Arbuszewski, Jennifer Gao, Yu |
spellingShingle |
Du, Xiaojing Russell, James M. Liu, Zhengyu Otto-Bliesner, Bette L. Oppo, Delia W. Mohtadi, Mahyar Zhu, Chenyu Galy, Valier V. Schefuß, Enno Yan, Yan Rosenthal, Yair Dubois, Nathalie Arbuszewski, Jennifer Gao, Yu North Atlantic cooling triggered a zonal mode over the Indian Ocean during Heinrich Stadial 1 ... |
author_facet |
Du, Xiaojing Russell, James M. Liu, Zhengyu Otto-Bliesner, Bette L. Oppo, Delia W. Mohtadi, Mahyar Zhu, Chenyu Galy, Valier V. Schefuß, Enno Yan, Yan Rosenthal, Yair Dubois, Nathalie Arbuszewski, Jennifer Gao, Yu |
author_sort |
Du, Xiaojing |
title |
North Atlantic cooling triggered a zonal mode over the Indian Ocean during Heinrich Stadial 1 ... |
title_short |
North Atlantic cooling triggered a zonal mode over the Indian Ocean during Heinrich Stadial 1 ... |
title_full |
North Atlantic cooling triggered a zonal mode over the Indian Ocean during Heinrich Stadial 1 ... |
title_fullStr |
North Atlantic cooling triggered a zonal mode over the Indian Ocean during Heinrich Stadial 1 ... |
title_full_unstemmed |
North Atlantic cooling triggered a zonal mode over the Indian Ocean during Heinrich Stadial 1 ... |
title_sort |
north atlantic cooling triggered a zonal mode over the indian ocean during heinrich stadial 1 ... |
publisher |
ETH Zurich |
publishDate |
2023 |
url |
https://dx.doi.org/10.3929/ethz-b-000591867 http://hdl.handle.net/20.500.11850/591867 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_doi |
https://doi.org/10.3929/ethz-b-000591867 |
_version_ |
1797588355071868928 |