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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ftpubmed:oai:pubmedcentral.nih.gov:9812376 2023-05-15T17:32:46+02:00 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 2023-01-04 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9812376/ http://www.ncbi.nlm.nih.gov/pubmed/36598985 https://doi.org/10.1126/sciadv.add4909 en eng American Association for the Advancement of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9812376/ http://www.ncbi.nlm.nih.gov/pubmed/36598985 http://dx.doi.org/10.1126/sciadv.add4909 Copyright © 2023 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. CC-BY-NC Sci Adv Earth Environmental Ecological and Space Sciences Text 2023 ftpubmed https://doi.org/10.1126/sciadv.add4909 2023-01-15T01:35:19Z 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 anomalies, highlighting their importance for future climate change. Text North Atlantic PubMed Central (PMC) Indian Sunda ENVELOPE(-6.982,-6.982,62.205,62.205) Science Advances 9 1 |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Earth Environmental Ecological and Space Sciences |
spellingShingle |
Earth Environmental Ecological and Space Sciences 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 |
topic_facet |
Earth Environmental Ecological and Space Sciences |
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 anomalies, highlighting their importance for future climate change. |
format |
Text |
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 |
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 |
American Association for the Advancement of Science |
publishDate |
2023 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9812376/ http://www.ncbi.nlm.nih.gov/pubmed/36598985 https://doi.org/10.1126/sciadv.add4909 |
long_lat |
ENVELOPE(-6.982,-6.982,62.205,62.205) |
geographic |
Indian Sunda |
geographic_facet |
Indian Sunda |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Sci Adv |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9812376/ http://www.ncbi.nlm.nih.gov/pubmed/36598985 http://dx.doi.org/10.1126/sciadv.add4909 |
op_rights |
Copyright © 2023 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
op_rightsnorm |
CC-BY-NC |
op_doi |
https://doi.org/10.1126/sciadv.add4909 |
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Science Advances |
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9 |
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1 |
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1766131035114831872 |