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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ftnanyangtu:oai:dr.ntu.edu.sg:10356/164201 2023-05-15T17:36:53+02:00 Precipitation response to Heinrich Event-3 in the northern Indochina as revealed in a high-resolution speleothem record Nguyen, Dung Chi Lee, Shih-Yu Chen, Yue-Gau Chiang, Hong-Wei Shen, Chuan-Chou Wang, Xianfeng Doan, Lam Dinh Lin, Yin Asian School of the Environment Earth Observatory of Singapore 2022 application/pdf https://hdl.handle.net/10356/164201 https://doi.org/10.1016/j.jaesx.2022.100090 en eng MOE2019-T2-1-174 Journal of Asian Earth Sciences: X Nguyen, D. C., Lee, S., Chen, Y., Chiang, H., Shen, C., Wang, X., Doan, L. D. & Lin, Y. (2022). Precipitation response to Heinrich Event-3 in the northern Indochina as revealed in a high-resolution speleothem record. Journal of Asian Earth Sciences: X, 7, 100090-. https://dx.doi.org/10.1016/j.jaesx.2022.100090 2590-0560 https://hdl.handle.net/10356/164201 doi:10.1016/j.jaesx.2022.100090 2-s2.0-85126953076 7 100090 © 2022 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). CC-BY-NC-ND Science::Geology Heinrich Event Speleothem Journal Article 2022 ftnanyangtu https://doi.org/10.1016/j.jaesx.2022.100090 2023-01-20T01:18:17Z 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. Ministry of Education (MOE) Nanyang Technological University Published version This study is financially supported by the Ministry of Science and Technology (MOST), Taiwan, under grant number 107-2116-M-002-015-MY3 and MOST 103-2116-M-002-027-MY3 to Y.-G.C. XW acknowledges the funding support from Singapore Ministry of Education (MOE2019-T2-1-174) and Earth ... Article in Journal/Newspaper North Atlantic DR-NTU (Digital Repository at Nanyang Technological University, Singapore) Indian Moe ENVELOPE(-45.683,-45.683,-60.733,-60.733) Journal of Asian Earth Sciences: X 7 100090 |
institution |
Open Polar |
collection |
DR-NTU (Digital Repository at Nanyang Technological University, Singapore) |
op_collection_id |
ftnanyangtu |
language |
English |
topic |
Science::Geology Heinrich Event Speleothem |
spellingShingle |
Science::Geology Heinrich Event Speleothem Nguyen, Dung Chi Lee, Shih-Yu Chen, Yue-Gau Chiang, Hong-Wei Shen, Chuan-Chou Wang, Xianfeng Doan, Lam Dinh Lin, Yin Precipitation response to Heinrich Event-3 in the northern Indochina as revealed in a high-resolution speleothem record |
topic_facet |
Science::Geology Heinrich Event Speleothem |
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. Ministry of Education (MOE) Nanyang Technological University Published version This study is financially supported by the Ministry of Science and Technology (MOST), Taiwan, under grant number 107-2116-M-002-015-MY3 and MOST 103-2116-M-002-027-MY3 to Y.-G.C. XW acknowledges the funding support from Singapore Ministry of Education (MOE2019-T2-1-174) and Earth ... |
author2 |
Asian School of the Environment Earth Observatory of Singapore |
format |
Article in Journal/Newspaper |
author |
Nguyen, Dung Chi Lee, Shih-Yu Chen, Yue-Gau Chiang, Hong-Wei Shen, Chuan-Chou Wang, Xianfeng Doan, Lam Dinh Lin, Yin |
author_facet |
Nguyen, Dung Chi Lee, Shih-Yu Chen, Yue-Gau Chiang, Hong-Wei Shen, Chuan-Chou Wang, Xianfeng Doan, Lam Dinh Lin, Yin |
author_sort |
Nguyen, Dung Chi |
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 |
publishDate |
2022 |
url |
https://hdl.handle.net/10356/164201 https://doi.org/10.1016/j.jaesx.2022.100090 |
long_lat |
ENVELOPE(-45.683,-45.683,-60.733,-60.733) |
geographic |
Indian Moe |
geographic_facet |
Indian Moe |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
MOE2019-T2-1-174 Journal of Asian Earth Sciences: X Nguyen, D. C., Lee, S., Chen, Y., Chiang, H., Shen, C., Wang, X., Doan, L. D. & Lin, Y. (2022). Precipitation response to Heinrich Event-3 in the northern Indochina as revealed in a high-resolution speleothem record. Journal of Asian Earth Sciences: X, 7, 100090-. https://dx.doi.org/10.1016/j.jaesx.2022.100090 2590-0560 https://hdl.handle.net/10356/164201 doi:10.1016/j.jaesx.2022.100090 2-s2.0-85126953076 7 100090 |
op_rights |
© 2022 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
op_rightsnorm |
CC-BY-NC-ND |
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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1766136527628271616 |