The 4.2 ka BP event: multi-proxy records from a closed lake in the northern margin of the East Asian summer monsoon
The 4.2 ka BP event has been widely investigated since it was suggested to be a possible cause for the collapse of ancient civilizations. With the growth of proxy records for decades, however, both its nature and its spatial pattern have become controversial. Here we examined multi-proxy data of the...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00004393 2023-05-15T17:31:31+02:00 The 4.2 ka BP event: multi-proxy records from a closed lake in the northern margin of the East Asian summer monsoon Xiao, Jule Zhang, Shengrui Fan, Jiawei Wen, Ruilin Zhai, Dayou Tian, Zhiping Jiang, Dabang 2018-10 electronic https://doi.org/10.5194/cp-14-1417-2018 https://noa.gwlb.de/receive/cop_mods_00004393 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00004350/cp-14-1417-2018.pdf https://cp.copernicus.org/articles/14/1417/2018/cp-14-1417-2018.pdf eng eng Copernicus Publications Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-14-1417-2018 https://noa.gwlb.de/receive/cop_mods_00004393 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00004350/cp-14-1417-2018.pdf https://cp.copernicus.org/articles/14/1417/2018/cp-14-1417-2018.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2018 ftnonlinearchiv https://doi.org/10.5194/cp-14-1417-2018 2022-02-08T23:00:06Z The 4.2 ka BP event has been widely investigated since it was suggested to be a possible cause for the collapse of ancient civilizations. With the growth of proxy records for decades, however, both its nature and its spatial pattern have become controversial. Here we examined multi-proxy data of the grain-size distribution, ostracode assemblage, pollen assemblage, and the pollen-reconstructed mean annual precipitation from a sediment core at Hulun Lake in northeastern Inner Mongolia spanning the period between 5000 and 3000 cal. yr BP to identify the nature and the associated mechanism of the 4.2 ka BP event occurring in the monsoonal region of eastern Asia. Higher sand fraction contents, littoral ostracode abundances, and Chenopodiaceae pollen percentages together with lower mean annual precipitation reveal a significant dry event at the interval of 4210–3840 cal. yr BP that could be a regional manifestation of the 4.2 ka BP event in the northern margin of the East Asian summer monsoon (EASM). We suggest that the drought would be caused by a decline in the intensity of the EASM on millennial-to-centennial scales that could be physically related to persistent cooling of surface waters in the western tropical Pacific and the North Atlantic. The cooling of western tropical Pacific surface waters could reduce moisture production over the source area of the EASM, while the cooling of North Atlantic surface waters could suppress northward migrations of the EASM rain belt, both leading to a weakened EASM and thus decreased rainfall in the northern margin of the EASM. Article in Journal/Newspaper North Atlantic Niedersächsisches Online-Archiv NOA Pacific Climate of the Past 14 10 1417 1425 |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Xiao, Jule Zhang, Shengrui Fan, Jiawei Wen, Ruilin Zhai, Dayou Tian, Zhiping Jiang, Dabang The 4.2 ka BP event: multi-proxy records from a closed lake in the northern margin of the East Asian summer monsoon |
topic_facet |
article Verlagsveröffentlichung |
description |
The 4.2 ka BP event has been widely investigated since it was suggested to be a possible cause for the collapse of ancient civilizations. With the growth of proxy records for decades, however, both its nature and its spatial pattern have become controversial. Here we examined multi-proxy data of the grain-size distribution, ostracode assemblage, pollen assemblage, and the pollen-reconstructed mean annual precipitation from a sediment core at Hulun Lake in northeastern Inner Mongolia spanning the period between 5000 and 3000 cal. yr BP to identify the nature and the associated mechanism of the 4.2 ka BP event occurring in the monsoonal region of eastern Asia. Higher sand fraction contents, littoral ostracode abundances, and Chenopodiaceae pollen percentages together with lower mean annual precipitation reveal a significant dry event at the interval of 4210–3840 cal. yr BP that could be a regional manifestation of the 4.2 ka BP event in the northern margin of the East Asian summer monsoon (EASM). We suggest that the drought would be caused by a decline in the intensity of the EASM on millennial-to-centennial scales that could be physically related to persistent cooling of surface waters in the western tropical Pacific and the North Atlantic. The cooling of western tropical Pacific surface waters could reduce moisture production over the source area of the EASM, while the cooling of North Atlantic surface waters could suppress northward migrations of the EASM rain belt, both leading to a weakened EASM and thus decreased rainfall in the northern margin of the EASM. |
format |
Article in Journal/Newspaper |
author |
Xiao, Jule Zhang, Shengrui Fan, Jiawei Wen, Ruilin Zhai, Dayou Tian, Zhiping Jiang, Dabang |
author_facet |
Xiao, Jule Zhang, Shengrui Fan, Jiawei Wen, Ruilin Zhai, Dayou Tian, Zhiping Jiang, Dabang |
author_sort |
Xiao, Jule |
title |
The 4.2 ka BP event: multi-proxy records from a closed lake in the northern margin of the East Asian summer monsoon |
title_short |
The 4.2 ka BP event: multi-proxy records from a closed lake in the northern margin of the East Asian summer monsoon |
title_full |
The 4.2 ka BP event: multi-proxy records from a closed lake in the northern margin of the East Asian summer monsoon |
title_fullStr |
The 4.2 ka BP event: multi-proxy records from a closed lake in the northern margin of the East Asian summer monsoon |
title_full_unstemmed |
The 4.2 ka BP event: multi-proxy records from a closed lake in the northern margin of the East Asian summer monsoon |
title_sort |
4.2 ka bp event: multi-proxy records from a closed lake in the northern margin of the east asian summer monsoon |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/cp-14-1417-2018 https://noa.gwlb.de/receive/cop_mods_00004393 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00004350/cp-14-1417-2018.pdf https://cp.copernicus.org/articles/14/1417/2018/cp-14-1417-2018.pdf |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Climate of the Past -- http://www.copernicus.org/EGU/cp/cp/published_papers.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2217985 -- 1814-9332 https://doi.org/10.5194/cp-14-1417-2018 https://noa.gwlb.de/receive/cop_mods_00004393 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00004350/cp-14-1417-2018.pdf https://cp.copernicus.org/articles/14/1417/2018/cp-14-1417-2018.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/cp-14-1417-2018 |
container_title |
Climate of the Past |
container_volume |
14 |
container_issue |
10 |
container_start_page |
1417 |
op_container_end_page |
1425 |
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1766129146548715520 |