Jet transitions caused multiple abrupt droughts in the Asian summer monsoon margin during Holocene times
The Asian Summer Monsoon (ASM) margin is vulnerable to climate change and a distinct boundary of population and archeological sites exists along the margin. Although lots of studies have been undertaken along the margin, the Holocene history of climate variation is highly debated; for example, wheth...
Published in: | Palaeogeography, Palaeoclimatology, Palaeoecology |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2022
|
Subjects: | |
Online Access: | https://doi.org/10.1016/j.palaeo.2022.111106 |
id |
fteawag:oai:dora:eawag_25097 |
---|---|
record_format |
openpolar |
spelling |
fteawag:oai:dora:eawag_25097 2023-06-18T03:42:07+02:00 Jet transitions caused multiple abrupt droughts in the Asian summer monsoon margin during Holocene times Zhong, Yuezhi Dubois, Nathalie Xiong, Jianguo Deng, Chenglong Zhang, Huiping Xiao, Wenjie Lu, Honghua Hu, Xiu Li, Youli 2022 https://doi.org/10.1016/j.palaeo.2022.111106 eng eng Elsevier Palaeogeography, Palaeoclimatology, Palaeoecology--Palaeogeogr. Palaeoclimatol. Palaeoecol.--journals:2292--0031-0182 eawag:25097 doi:10.1016/j.palaeo.2022.111106 scopus: 2-s2.0-85132432300 journal id: journals:2292 issn: 0031-0182 ut: 000820159700002 Holocene Asian summer monsoon margin moisture variation multiple paleosol/loess layers gradual wetting abrupt drought Journal Article Text 2022 fteawag https://doi.org/10.1016/j.palaeo.2022.111106 2023-06-04T23:49:55Z The Asian Summer Monsoon (ASM) margin is vulnerable to climate change and a distinct boundary of population and archeological sites exists along the margin. Although lots of studies have been undertaken along the margin, the Holocene history of climate variation is highly debated; for example, whether the climatic optimum occurred in the early Holocene or middle Holocene. In addition, moisture variations on millennial to centennial timescales remain unclear. In this study, we reconstruct moisture variation at the modern junction of the ASM and the Westerlies based on a well-dated (13.3-0.5 ka) loess section in northwest China. On an orbital timescale, moisture variations generally follow changes in insolation with the longest and most intense humid period from 11.3 ka to 8.7 ka, supporting the concept of an early Holocene climatic optimum in the ASM margin. On millennial to centennial timescales, four sequences of long-term gradual wetting and subsequent abrupt drought are noted, i.e., thousands of years were required to reach a favorable environment in the ASM margin, while in only a few hundred years of drought would occur subsequently. Terminations of humid periods correspond to the occurrences of cold events in the North Atlantic realm, indicating an important role for the Atlantic Meridional Overturning Circulation (AMOC) on millennial to centennial timescales. We suggest solar insolation and the AMOC as the dominant factors on orbital timescale and millennial to centennial timescales, respectively. Both factors modulate moisture variations in the ASM margin by influencing the interplay between the ASM and the Westerlies. Article in Journal/Newspaper North Atlantic DORA Eawag Palaeogeography, Palaeoclimatology, Palaeoecology 601 111106 |
institution |
Open Polar |
collection |
DORA Eawag |
op_collection_id |
fteawag |
language |
English |
topic |
Holocene Asian summer monsoon margin moisture variation multiple paleosol/loess layers gradual wetting abrupt drought |
spellingShingle |
Holocene Asian summer monsoon margin moisture variation multiple paleosol/loess layers gradual wetting abrupt drought Zhong, Yuezhi Dubois, Nathalie Xiong, Jianguo Deng, Chenglong Zhang, Huiping Xiao, Wenjie Lu, Honghua Hu, Xiu Li, Youli Jet transitions caused multiple abrupt droughts in the Asian summer monsoon margin during Holocene times |
topic_facet |
Holocene Asian summer monsoon margin moisture variation multiple paleosol/loess layers gradual wetting abrupt drought |
description |
The Asian Summer Monsoon (ASM) margin is vulnerable to climate change and a distinct boundary of population and archeological sites exists along the margin. Although lots of studies have been undertaken along the margin, the Holocene history of climate variation is highly debated; for example, whether the climatic optimum occurred in the early Holocene or middle Holocene. In addition, moisture variations on millennial to centennial timescales remain unclear. In this study, we reconstruct moisture variation at the modern junction of the ASM and the Westerlies based on a well-dated (13.3-0.5 ka) loess section in northwest China. On an orbital timescale, moisture variations generally follow changes in insolation with the longest and most intense humid period from 11.3 ka to 8.7 ka, supporting the concept of an early Holocene climatic optimum in the ASM margin. On millennial to centennial timescales, four sequences of long-term gradual wetting and subsequent abrupt drought are noted, i.e., thousands of years were required to reach a favorable environment in the ASM margin, while in only a few hundred years of drought would occur subsequently. Terminations of humid periods correspond to the occurrences of cold events in the North Atlantic realm, indicating an important role for the Atlantic Meridional Overturning Circulation (AMOC) on millennial to centennial timescales. We suggest solar insolation and the AMOC as the dominant factors on orbital timescale and millennial to centennial timescales, respectively. Both factors modulate moisture variations in the ASM margin by influencing the interplay between the ASM and the Westerlies. |
format |
Article in Journal/Newspaper |
author |
Zhong, Yuezhi Dubois, Nathalie Xiong, Jianguo Deng, Chenglong Zhang, Huiping Xiao, Wenjie Lu, Honghua Hu, Xiu Li, Youli |
author_facet |
Zhong, Yuezhi Dubois, Nathalie Xiong, Jianguo Deng, Chenglong Zhang, Huiping Xiao, Wenjie Lu, Honghua Hu, Xiu Li, Youli |
author_sort |
Zhong, Yuezhi |
title |
Jet transitions caused multiple abrupt droughts in the Asian summer monsoon margin during Holocene times |
title_short |
Jet transitions caused multiple abrupt droughts in the Asian summer monsoon margin during Holocene times |
title_full |
Jet transitions caused multiple abrupt droughts in the Asian summer monsoon margin during Holocene times |
title_fullStr |
Jet transitions caused multiple abrupt droughts in the Asian summer monsoon margin during Holocene times |
title_full_unstemmed |
Jet transitions caused multiple abrupt droughts in the Asian summer monsoon margin during Holocene times |
title_sort |
jet transitions caused multiple abrupt droughts in the asian summer monsoon margin during holocene times |
publisher |
Elsevier |
publishDate |
2022 |
url |
https://doi.org/10.1016/j.palaeo.2022.111106 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Palaeogeography, Palaeoclimatology, Palaeoecology--Palaeogeogr. Palaeoclimatol. Palaeoecol.--journals:2292--0031-0182 eawag:25097 doi:10.1016/j.palaeo.2022.111106 scopus: 2-s2.0-85132432300 journal id: journals:2292 issn: 0031-0182 ut: 000820159700002 |
op_doi |
https://doi.org/10.1016/j.palaeo.2022.111106 |
container_title |
Palaeogeography, Palaeoclimatology, Palaeoecology |
container_volume |
601 |
container_start_page |
111106 |
_version_ |
1769007935431639040 |