Abrupt climatic events recorded by the Ili loess during the last glaciation in Central Asia: Evidence from grain-size and minerals
The loess record of Central Asia provides an important archive of regional climate and environmental changes. In contrast to the widely investigated loess deposits in the Chinese Loess Plateau, Central Asian loess-paleosol sequences remain poorly understood. Here, we present an aeolian loess section...
Published in: | Journal of Asian Earth Sciences |
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Online Access: | http://ir.ieecas.cn/handle/361006/5223 https://doi.org/10.1016/j.jseaes.2017.10.040 |
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ftchinacascieeca:oai:ir.ieecas.cn:361006/5223 2023-06-11T04:11:14+02:00 Abrupt climatic events recorded by the Ili loess during the last glaciation in Central Asia: Evidence from grain-size and minerals Song, Yougui Zeng, Mengxiu Chen, Xiuling Li, Yue Chang, Hong An, Zhisheng Guo, Xiaohua 2018-04-15 http://ir.ieecas.cn/handle/361006/5223 https://doi.org/10.1016/j.jseaes.2017.10.040 英语 eng JOURNAL OF ASIAN EARTH SCIENCES http://ir.ieecas.cn/handle/361006/5223 doi:10.1016/j.jseaes.2017.10.040 Loess Abrupt Climatic Events Grain Size Minerals Last Glaciation Central Asia Science & Technology Physical Sciences NORTHEASTERN TIBETAN PLATEAU CHINESE LOESS ICE-CORE SUMMER MONSOON NORTH-ATLANTIC MAGNETIC-SUSCEPTIBILITY DUST ACCUMULATION NW CHINA INSTABILITY BASIN Geology Geosciences Multidisciplinary Article 期刊论文 2018 ftchinacascieeca https://doi.org/10.1016/j.jseaes.2017.10.040 2023-05-08T13:22:44Z The loess record of Central Asia provides an important archive of regional climate and environmental changes. In contrast to the widely investigated loess deposits in the Chinese Loess Plateau, Central Asian loess-paleosol sequences remain poorly understood. Here, we present an aeolian loess section in the southern Ili Basin. Based on granularity and mineralogical analyses, we reconstruct climatic changes during the last glaciation. The results indicated that most of the abrupt climatic events (such as Dansgaard-Oeschger events and Heinrich events) were imprinted in this loess section, although their amplitudes and ages showed some differences. Compared with the millennial oscillations recoded in loess and stalagmites in East Asia, the arid Central Asia responded more sensitively to the warming events than to the cooling events. The shifting trajectory of westerlies across Central Asia played an important role in dust deposition during the stadials. The North Atlantic climatic signals may have been transmitted from Central Asia to the East Asian monsoon regions via the westerlies. Article in Journal/Newspaper Dansgaard-Oeschger events ice core North Atlantic Institute of Earth Environment: IEECAS OpenIR (Chinese Academy of Sciences) Plateau Central ENVELOPE(69.577,69.577,-49.389,-49.389) Journal of Asian Earth Sciences 155 58 67 |
institution |
Open Polar |
collection |
Institute of Earth Environment: IEECAS OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchinacascieeca |
language |
English |
topic |
Loess Abrupt Climatic Events Grain Size Minerals Last Glaciation Central Asia Science & Technology Physical Sciences NORTHEASTERN TIBETAN PLATEAU CHINESE LOESS ICE-CORE SUMMER MONSOON NORTH-ATLANTIC MAGNETIC-SUSCEPTIBILITY DUST ACCUMULATION NW CHINA INSTABILITY BASIN Geology Geosciences Multidisciplinary |
spellingShingle |
Loess Abrupt Climatic Events Grain Size Minerals Last Glaciation Central Asia Science & Technology Physical Sciences NORTHEASTERN TIBETAN PLATEAU CHINESE LOESS ICE-CORE SUMMER MONSOON NORTH-ATLANTIC MAGNETIC-SUSCEPTIBILITY DUST ACCUMULATION NW CHINA INSTABILITY BASIN Geology Geosciences Multidisciplinary Song, Yougui Zeng, Mengxiu Chen, Xiuling Li, Yue Chang, Hong An, Zhisheng Guo, Xiaohua Abrupt climatic events recorded by the Ili loess during the last glaciation in Central Asia: Evidence from grain-size and minerals |
topic_facet |
Loess Abrupt Climatic Events Grain Size Minerals Last Glaciation Central Asia Science & Technology Physical Sciences NORTHEASTERN TIBETAN PLATEAU CHINESE LOESS ICE-CORE SUMMER MONSOON NORTH-ATLANTIC MAGNETIC-SUSCEPTIBILITY DUST ACCUMULATION NW CHINA INSTABILITY BASIN Geology Geosciences Multidisciplinary |
description |
The loess record of Central Asia provides an important archive of regional climate and environmental changes. In contrast to the widely investigated loess deposits in the Chinese Loess Plateau, Central Asian loess-paleosol sequences remain poorly understood. Here, we present an aeolian loess section in the southern Ili Basin. Based on granularity and mineralogical analyses, we reconstruct climatic changes during the last glaciation. The results indicated that most of the abrupt climatic events (such as Dansgaard-Oeschger events and Heinrich events) were imprinted in this loess section, although their amplitudes and ages showed some differences. Compared with the millennial oscillations recoded in loess and stalagmites in East Asia, the arid Central Asia responded more sensitively to the warming events than to the cooling events. The shifting trajectory of westerlies across Central Asia played an important role in dust deposition during the stadials. The North Atlantic climatic signals may have been transmitted from Central Asia to the East Asian monsoon regions via the westerlies. |
format |
Article in Journal/Newspaper |
author |
Song, Yougui Zeng, Mengxiu Chen, Xiuling Li, Yue Chang, Hong An, Zhisheng Guo, Xiaohua |
author_facet |
Song, Yougui Zeng, Mengxiu Chen, Xiuling Li, Yue Chang, Hong An, Zhisheng Guo, Xiaohua |
author_sort |
Song, Yougui |
title |
Abrupt climatic events recorded by the Ili loess during the last glaciation in Central Asia: Evidence from grain-size and minerals |
title_short |
Abrupt climatic events recorded by the Ili loess during the last glaciation in Central Asia: Evidence from grain-size and minerals |
title_full |
Abrupt climatic events recorded by the Ili loess during the last glaciation in Central Asia: Evidence from grain-size and minerals |
title_fullStr |
Abrupt climatic events recorded by the Ili loess during the last glaciation in Central Asia: Evidence from grain-size and minerals |
title_full_unstemmed |
Abrupt climatic events recorded by the Ili loess during the last glaciation in Central Asia: Evidence from grain-size and minerals |
title_sort |
abrupt climatic events recorded by the ili loess during the last glaciation in central asia: evidence from grain-size and minerals |
publishDate |
2018 |
url |
http://ir.ieecas.cn/handle/361006/5223 https://doi.org/10.1016/j.jseaes.2017.10.040 |
long_lat |
ENVELOPE(69.577,69.577,-49.389,-49.389) |
geographic |
Plateau Central |
geographic_facet |
Plateau Central |
genre |
Dansgaard-Oeschger events ice core North Atlantic |
genre_facet |
Dansgaard-Oeschger events ice core North Atlantic |
op_relation |
JOURNAL OF ASIAN EARTH SCIENCES http://ir.ieecas.cn/handle/361006/5223 doi:10.1016/j.jseaes.2017.10.040 |
op_doi |
https://doi.org/10.1016/j.jseaes.2017.10.040 |
container_title |
Journal of Asian Earth Sciences |
container_volume |
155 |
container_start_page |
58 |
op_container_end_page |
67 |
_version_ |
1768386157201063936 |