Atmospheric Dust Variations in the Ili Basin, Northwest China, During the Last Glacial Period as Revealed by a High Mountain Loess-Paleosol Sequence
Atmospheric dust emission is closely related to conditions in the source area. Typically, loess deposits represent the accumulation of locally derived dust, providing the opportunity to reconstruct past variations in dust emission and hence insights into dust-climate linkages and the underlying mech...
Published in: | Journal of Geophysical Research: Atmospheres |
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Online Access: | http://ir.ieecas.cn/handle/361006/13520 https://doi.org/10.1029/2019JD030470 |
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ftchinacascieeca:oai:ir.ieecas.cn:361006/13520 2023-06-11T04:12:14+02:00 Atmospheric Dust Variations in the Ili Basin, Northwest China, During the Last Glacial Period as Revealed by a High Mountain Loess-Paleosol Sequence Li, Yue Song, Yougui Qiang, Mingrui Miao, Yunfa Zeng, Mengxiu 2019-08-16 http://ir.ieecas.cn/handle/361006/13520 https://doi.org/10.1029/2019JD030470 英语 eng AMER GEOPHYSICAL UNION JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES http://ir.ieecas.cn/handle/361006/13520 doi:10.1029/2019JD030470 Central Asia loess last glacial dust-climate linkage dynamic mechanism ARID CENTRAL-ASIA CHRONOLOGICALLY ORDERED SAMPLES HOLOCENE MOISTURE EVOLUTION QINGHAI-TIBETAN PLATEAU ABRUPT CLIMATIC EVENTS MASS ACCUMULATION RATE LATE QUATERNARY LOESS GREENLAND ICE-CORE GRAIN-SIZE NORTHERN CHINA Meteorology & Atmospheric Sciences 期刊论文 2019 ftchinacascieeca https://doi.org/10.1029/2019JD030470 2023-05-08T13:24:24Z Atmospheric dust emission is closely related to conditions in the source area. Typically, loess deposits represent the accumulation of locally derived dust, providing the opportunity to reconstruct past variations in dust emission and hence insights into dust-climate linkages and the underlying mechanisms of dust mobilization, transport, and deposition. As yet, however, information on patterns of dust emission in Central Asia is sparse. Here we present the last glacial sedimentological data of a loess section from the Ili Basin, northwest China. Our results show that the variations in sand-sized fraction can indicate frequencies of occurring strong winds, which was likely driven by the Eurasian ice sheets during Marine Isotope Stage Stage 2 (MIS2) and MIS4 and by the boreal summer insolation during MIS3. The mass accumulation rate (MAR) reflects an integration of sediment availability in the provenance, vegetation cover in the deposition area, and wind regime. The differences of driving factors potentially explain the observed mismatches between variations in grain size and MAR. Comparison of dust fluxes observed in Greenland ice core and the North Pacific deep-sea sediment with the Central/East Asian MAR records supports the idea that the high flux of long-distance export of Asian dust is closely associated with the Siberian High and also influenced by changes in the atmospheric transport efficiency and likely by the source strength. Report Greenland Greenland ice core ice core Institute of Earth Environment: IEECAS OpenIR (Chinese Academy of Sciences) Greenland Pacific Journal of Geophysical Research: Atmospheres 124 15 8449 8466 |
institution |
Open Polar |
collection |
Institute of Earth Environment: IEECAS OpenIR (Chinese Academy of Sciences) |
op_collection_id |
ftchinacascieeca |
language |
English |
topic |
Central Asia loess last glacial dust-climate linkage dynamic mechanism ARID CENTRAL-ASIA CHRONOLOGICALLY ORDERED SAMPLES HOLOCENE MOISTURE EVOLUTION QINGHAI-TIBETAN PLATEAU ABRUPT CLIMATIC EVENTS MASS ACCUMULATION RATE LATE QUATERNARY LOESS GREENLAND ICE-CORE GRAIN-SIZE NORTHERN CHINA Meteorology & Atmospheric Sciences |
spellingShingle |
Central Asia loess last glacial dust-climate linkage dynamic mechanism ARID CENTRAL-ASIA CHRONOLOGICALLY ORDERED SAMPLES HOLOCENE MOISTURE EVOLUTION QINGHAI-TIBETAN PLATEAU ABRUPT CLIMATIC EVENTS MASS ACCUMULATION RATE LATE QUATERNARY LOESS GREENLAND ICE-CORE GRAIN-SIZE NORTHERN CHINA Meteorology & Atmospheric Sciences Li, Yue Song, Yougui Qiang, Mingrui Miao, Yunfa Zeng, Mengxiu Atmospheric Dust Variations in the Ili Basin, Northwest China, During the Last Glacial Period as Revealed by a High Mountain Loess-Paleosol Sequence |
topic_facet |
Central Asia loess last glacial dust-climate linkage dynamic mechanism ARID CENTRAL-ASIA CHRONOLOGICALLY ORDERED SAMPLES HOLOCENE MOISTURE EVOLUTION QINGHAI-TIBETAN PLATEAU ABRUPT CLIMATIC EVENTS MASS ACCUMULATION RATE LATE QUATERNARY LOESS GREENLAND ICE-CORE GRAIN-SIZE NORTHERN CHINA Meteorology & Atmospheric Sciences |
description |
Atmospheric dust emission is closely related to conditions in the source area. Typically, loess deposits represent the accumulation of locally derived dust, providing the opportunity to reconstruct past variations in dust emission and hence insights into dust-climate linkages and the underlying mechanisms of dust mobilization, transport, and deposition. As yet, however, information on patterns of dust emission in Central Asia is sparse. Here we present the last glacial sedimentological data of a loess section from the Ili Basin, northwest China. Our results show that the variations in sand-sized fraction can indicate frequencies of occurring strong winds, which was likely driven by the Eurasian ice sheets during Marine Isotope Stage Stage 2 (MIS2) and MIS4 and by the boreal summer insolation during MIS3. The mass accumulation rate (MAR) reflects an integration of sediment availability in the provenance, vegetation cover in the deposition area, and wind regime. The differences of driving factors potentially explain the observed mismatches between variations in grain size and MAR. Comparison of dust fluxes observed in Greenland ice core and the North Pacific deep-sea sediment with the Central/East Asian MAR records supports the idea that the high flux of long-distance export of Asian dust is closely associated with the Siberian High and also influenced by changes in the atmospheric transport efficiency and likely by the source strength. |
format |
Report |
author |
Li, Yue Song, Yougui Qiang, Mingrui Miao, Yunfa Zeng, Mengxiu |
author_facet |
Li, Yue Song, Yougui Qiang, Mingrui Miao, Yunfa Zeng, Mengxiu |
author_sort |
Li, Yue |
title |
Atmospheric Dust Variations in the Ili Basin, Northwest China, During the Last Glacial Period as Revealed by a High Mountain Loess-Paleosol Sequence |
title_short |
Atmospheric Dust Variations in the Ili Basin, Northwest China, During the Last Glacial Period as Revealed by a High Mountain Loess-Paleosol Sequence |
title_full |
Atmospheric Dust Variations in the Ili Basin, Northwest China, During the Last Glacial Period as Revealed by a High Mountain Loess-Paleosol Sequence |
title_fullStr |
Atmospheric Dust Variations in the Ili Basin, Northwest China, During the Last Glacial Period as Revealed by a High Mountain Loess-Paleosol Sequence |
title_full_unstemmed |
Atmospheric Dust Variations in the Ili Basin, Northwest China, During the Last Glacial Period as Revealed by a High Mountain Loess-Paleosol Sequence |
title_sort |
atmospheric dust variations in the ili basin, northwest china, during the last glacial period as revealed by a high mountain loess-paleosol sequence |
publisher |
AMER GEOPHYSICAL UNION |
publishDate |
2019 |
url |
http://ir.ieecas.cn/handle/361006/13520 https://doi.org/10.1029/2019JD030470 |
geographic |
Greenland Pacific |
geographic_facet |
Greenland Pacific |
genre |
Greenland Greenland ice core ice core |
genre_facet |
Greenland Greenland ice core ice core |
op_relation |
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES http://ir.ieecas.cn/handle/361006/13520 doi:10.1029/2019JD030470 |
op_doi |
https://doi.org/10.1029/2019JD030470 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
124 |
container_issue |
15 |
container_start_page |
8449 |
op_container_end_page |
8466 |
_version_ |
1768387941941379072 |