Millennial Variability in Intermediate Ocean Circulation and Indian Monsoonal Weathering Inputs During the Last Deglaciation and Holocene
The relationship between ocean circulation and monsoon systems over orbital to sub-millennial timescales is a crucial but poorly constrained component of the climate system. Here, using foraminiferal and detrital neodymium (Nd) isotope records from the intermediate-depth northern Indian Ocean, we pr...
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American Geophysical Union (AGU)
2022
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ftucl:oai:eprints.ucl.ac.uk.OAI2:10158663 2023-12-24T10:11:08+01:00 Millennial Variability in Intermediate Ocean Circulation and Indian Monsoonal Weathering Inputs During the Last Deglaciation and Holocene Yu, Zhaojie Colin, Christophe Wilson, David J Bayon, Germain Song, Zehua Sepulcre, Sophie Dapoigny, Arnaud Li, Yuanlong Wan, Shiming 2022-11-16 text https://discovery.ucl.ac.uk/id/eprint/10158663/2/Wilson_Geophysical%20Research%20Letters%20-%202022%20-%20Yu%20-%20Millennial%20Variability%20in%20Intermediate%20Ocean%20Circulation%20and%20Indian%20Monsoonal.pdf https://discovery.ucl.ac.uk/id/eprint/10158663/ eng eng American Geophysical Union (AGU) https://discovery.ucl.ac.uk/id/eprint/10158663/2/Wilson_Geophysical%20Research%20Letters%20-%202022%20-%20Yu%20-%20Millennial%20Variability%20in%20Intermediate%20Ocean%20Circulation%20and%20Indian%20Monsoonal.pdf https://discovery.ucl.ac.uk/id/eprint/10158663/ open Geophysical Research Letters , 49 (21) , Article e2022GL100003. (2022) neodymium (Nd) isotope Indian Summer Monsoon Antarctic Intermediate Water Article 2022 ftucl 2023-11-27T13:07:39Z The relationship between ocean circulation and monsoon systems over orbital to sub-millennial timescales is a crucial but poorly constrained component of the climate system. Here, using foraminiferal and detrital neodymium (Nd) isotope records from the intermediate-depth northern Indian Ocean, we provide new evidence revealing that both monsoon-driven weathering inputs and water mass advection from the Southern Ocean influenced past seawater Nd isotope changes in this region. Our results suggest that Indian Summer Monsoon weakening coincided with enhanced northward Antarctic Intermediate Water (AAIW) advection during the last deglaciation, reflecting a strong interhemispheric coupling. In contrast, the Early Holocene was characterized by enhanced monsoon strength but persistently strong AAIW inflow, indicating a relationship in the opposite sense. These differing interhemispheric relationships indicate asynchronous changes in the global atmosphere—ocean—climate system, and may represent a previously unrecognized component of the ocean-atmosphere reorganization during the deglacial to Holocene transition. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean University College London: UCL Discovery Antarctic Southern Ocean Indian |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
English |
topic |
neodymium (Nd) isotope Indian Summer Monsoon Antarctic Intermediate Water |
spellingShingle |
neodymium (Nd) isotope Indian Summer Monsoon Antarctic Intermediate Water Yu, Zhaojie Colin, Christophe Wilson, David J Bayon, Germain Song, Zehua Sepulcre, Sophie Dapoigny, Arnaud Li, Yuanlong Wan, Shiming Millennial Variability in Intermediate Ocean Circulation and Indian Monsoonal Weathering Inputs During the Last Deglaciation and Holocene |
topic_facet |
neodymium (Nd) isotope Indian Summer Monsoon Antarctic Intermediate Water |
description |
The relationship between ocean circulation and monsoon systems over orbital to sub-millennial timescales is a crucial but poorly constrained component of the climate system. Here, using foraminiferal and detrital neodymium (Nd) isotope records from the intermediate-depth northern Indian Ocean, we provide new evidence revealing that both monsoon-driven weathering inputs and water mass advection from the Southern Ocean influenced past seawater Nd isotope changes in this region. Our results suggest that Indian Summer Monsoon weakening coincided with enhanced northward Antarctic Intermediate Water (AAIW) advection during the last deglaciation, reflecting a strong interhemispheric coupling. In contrast, the Early Holocene was characterized by enhanced monsoon strength but persistently strong AAIW inflow, indicating a relationship in the opposite sense. These differing interhemispheric relationships indicate asynchronous changes in the global atmosphere—ocean—climate system, and may represent a previously unrecognized component of the ocean-atmosphere reorganization during the deglacial to Holocene transition. |
format |
Article in Journal/Newspaper |
author |
Yu, Zhaojie Colin, Christophe Wilson, David J Bayon, Germain Song, Zehua Sepulcre, Sophie Dapoigny, Arnaud Li, Yuanlong Wan, Shiming |
author_facet |
Yu, Zhaojie Colin, Christophe Wilson, David J Bayon, Germain Song, Zehua Sepulcre, Sophie Dapoigny, Arnaud Li, Yuanlong Wan, Shiming |
author_sort |
Yu, Zhaojie |
title |
Millennial Variability in Intermediate Ocean Circulation and Indian Monsoonal Weathering Inputs During the Last Deglaciation and Holocene |
title_short |
Millennial Variability in Intermediate Ocean Circulation and Indian Monsoonal Weathering Inputs During the Last Deglaciation and Holocene |
title_full |
Millennial Variability in Intermediate Ocean Circulation and Indian Monsoonal Weathering Inputs During the Last Deglaciation and Holocene |
title_fullStr |
Millennial Variability in Intermediate Ocean Circulation and Indian Monsoonal Weathering Inputs During the Last Deglaciation and Holocene |
title_full_unstemmed |
Millennial Variability in Intermediate Ocean Circulation and Indian Monsoonal Weathering Inputs During the Last Deglaciation and Holocene |
title_sort |
millennial variability in intermediate ocean circulation and indian monsoonal weathering inputs during the last deglaciation and holocene |
publisher |
American Geophysical Union (AGU) |
publishDate |
2022 |
url |
https://discovery.ucl.ac.uk/id/eprint/10158663/2/Wilson_Geophysical%20Research%20Letters%20-%202022%20-%20Yu%20-%20Millennial%20Variability%20in%20Intermediate%20Ocean%20Circulation%20and%20Indian%20Monsoonal.pdf https://discovery.ucl.ac.uk/id/eprint/10158663/ |
geographic |
Antarctic Southern Ocean Indian |
geographic_facet |
Antarctic Southern Ocean Indian |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
Geophysical Research Letters , 49 (21) , Article e2022GL100003. (2022) |
op_relation |
https://discovery.ucl.ac.uk/id/eprint/10158663/2/Wilson_Geophysical%20Research%20Letters%20-%202022%20-%20Yu%20-%20Millennial%20Variability%20in%20Intermediate%20Ocean%20Circulation%20and%20Indian%20Monsoonal.pdf https://discovery.ucl.ac.uk/id/eprint/10158663/ |
op_rights |
open |
_version_ |
1786160972517343232 |