Precipitation response to Heinrich Event-3 in the northern Indochina as revealed in a high-resolution speleothem record
Heinrich Event-3 (HE-3) differs from other Heinrich Events (HEs) in terms of the strength of its expression in climatic records from different global localities. Here, we present new high resolution δ18O records from a composite speleothem record spanning from 31.5 to 28.4 ka within the HE-3 time in...
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ftdoajarticles:oai:doaj.org/article:44214223434d40b9a7470ba420cc34ed 2023-05-15T17:35:13+02:00 Precipitation response to Heinrich Event-3 in the northern Indochina as revealed in a high-resolution speleothem record Dung Chi Nguyen Shih-Yu Lee Yue-Gau Chen Hong-Wei Chiang Chuan-Chou Shen Xianfeng Wang Lam Dinh Doan Yin Lin 2022-06-01T00:00:00Z https://doi.org/10.1016/j.jaesx.2022.100090 https://doaj.org/article/44214223434d40b9a7470ba420cc34ed EN eng Elsevier http://www.sciencedirect.com/science/article/pii/S2590056022000111 https://doaj.org/toc/2590-0560 2590-0560 doi:10.1016/j.jaesx.2022.100090 https://doaj.org/article/44214223434d40b9a7470ba420cc34ed Journal of Asian Earth Sciences: X, Vol 7, Iss , Pp 100090- (2022) Heinrich event Speleothem Climate change Tropical Asia Geology QE1-996.5 article 2022 ftdoajarticles https://doi.org/10.1016/j.jaesx.2022.100090 2022-12-30T21:36:59Z Heinrich Event-3 (HE-3) differs from other Heinrich Events (HEs) in terms of the strength of its expression in climatic records from different global localities. Here, we present new high resolution δ18O records from a composite speleothem record spanning from 31.5 to 28.4 ka within the HE-3 time interval. The record is obtained from two stalagmites collected from the Thuong Thien cave (TT), northern Vietnam, which exhibit growth rates of 0.12 to 0.68 mm/yr. The TT record shows a pronounced positive excursion of δ18O values of stalagmite in the time interval from 30.8 ka and lasted about one thousand years. Specifically, the δ18O reached maximum between ∼30.3–30.2 ka and returned to low values at 29.5 ka. Both the onset and termination phases of the excursion show gradual changes in δ18O values that form a relatively symmetric ‘V’ shape. The excursion suggests that the Indian Summer Monsoon (ISM), which modulates the climate and hydrology in the region, has endured dramatic weakening in response to HE-3. The timing and duration of the monsoonal decline are consistent with a significant slowdown of the Atlantic Meridional Ocean Circulation (AMOC), which probably drove the southward migration of the intertropical convergence zone (ITCZ) and consequently a decrease in precipitation over the Asian monsoonal region including northern Vietnam. To test the proposed mechanism, we further performed modeling simulations via an atmosphere general circulation model with a coupled slab ocean. Simulated results confirm both the scale and mechanistic connections between cooling in the North Atlantic and changes in precipitation at the Thuong Thien cave locality. Article in Journal/Newspaper North Atlantic Directory of Open Access Journals: DOAJ Articles Indian Journal of Asian Earth Sciences: X 7 100090 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Heinrich event Speleothem Climate change Tropical Asia Geology QE1-996.5 |
spellingShingle |
Heinrich event Speleothem Climate change Tropical Asia Geology QE1-996.5 Dung Chi Nguyen Shih-Yu Lee Yue-Gau Chen Hong-Wei Chiang Chuan-Chou Shen Xianfeng Wang Lam Dinh Doan Yin Lin Precipitation response to Heinrich Event-3 in the northern Indochina as revealed in a high-resolution speleothem record |
topic_facet |
Heinrich event Speleothem Climate change Tropical Asia Geology QE1-996.5 |
description |
Heinrich Event-3 (HE-3) differs from other Heinrich Events (HEs) in terms of the strength of its expression in climatic records from different global localities. Here, we present new high resolution δ18O records from a composite speleothem record spanning from 31.5 to 28.4 ka within the HE-3 time interval. The record is obtained from two stalagmites collected from the Thuong Thien cave (TT), northern Vietnam, which exhibit growth rates of 0.12 to 0.68 mm/yr. The TT record shows a pronounced positive excursion of δ18O values of stalagmite in the time interval from 30.8 ka and lasted about one thousand years. Specifically, the δ18O reached maximum between ∼30.3–30.2 ka and returned to low values at 29.5 ka. Both the onset and termination phases of the excursion show gradual changes in δ18O values that form a relatively symmetric ‘V’ shape. The excursion suggests that the Indian Summer Monsoon (ISM), which modulates the climate and hydrology in the region, has endured dramatic weakening in response to HE-3. The timing and duration of the monsoonal decline are consistent with a significant slowdown of the Atlantic Meridional Ocean Circulation (AMOC), which probably drove the southward migration of the intertropical convergence zone (ITCZ) and consequently a decrease in precipitation over the Asian monsoonal region including northern Vietnam. To test the proposed mechanism, we further performed modeling simulations via an atmosphere general circulation model with a coupled slab ocean. Simulated results confirm both the scale and mechanistic connections between cooling in the North Atlantic and changes in precipitation at the Thuong Thien cave locality. |
format |
Article in Journal/Newspaper |
author |
Dung Chi Nguyen Shih-Yu Lee Yue-Gau Chen Hong-Wei Chiang Chuan-Chou Shen Xianfeng Wang Lam Dinh Doan Yin Lin |
author_facet |
Dung Chi Nguyen Shih-Yu Lee Yue-Gau Chen Hong-Wei Chiang Chuan-Chou Shen Xianfeng Wang Lam Dinh Doan Yin Lin |
author_sort |
Dung Chi Nguyen |
title |
Precipitation response to Heinrich Event-3 in the northern Indochina as revealed in a high-resolution speleothem record |
title_short |
Precipitation response to Heinrich Event-3 in the northern Indochina as revealed in a high-resolution speleothem record |
title_full |
Precipitation response to Heinrich Event-3 in the northern Indochina as revealed in a high-resolution speleothem record |
title_fullStr |
Precipitation response to Heinrich Event-3 in the northern Indochina as revealed in a high-resolution speleothem record |
title_full_unstemmed |
Precipitation response to Heinrich Event-3 in the northern Indochina as revealed in a high-resolution speleothem record |
title_sort |
precipitation response to heinrich event-3 in the northern indochina as revealed in a high-resolution speleothem record |
publisher |
Elsevier |
publishDate |
2022 |
url |
https://doi.org/10.1016/j.jaesx.2022.100090 https://doaj.org/article/44214223434d40b9a7470ba420cc34ed |
geographic |
Indian |
geographic_facet |
Indian |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Journal of Asian Earth Sciences: X, Vol 7, Iss , Pp 100090- (2022) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S2590056022000111 https://doaj.org/toc/2590-0560 2590-0560 doi:10.1016/j.jaesx.2022.100090 https://doaj.org/article/44214223434d40b9a7470ba420cc34ed |
op_doi |
https://doi.org/10.1016/j.jaesx.2022.100090 |
container_title |
Journal of Asian Earth Sciences: X |
container_volume |
7 |
container_start_page |
100090 |
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1766134299388542976 |