DOI: 10.1002/2017JD027483
Scopus记录号: 2-s2.0-85041084945
论文题名: Decoupling of Climatic Drying and Asian Dust Export During the Holocene
作者: Xu B. ; Wang L. ; Gu Z. ; Hao Q. ; Wang H. ; Chu G. ; Jiang D. ; Liu Q. ; Qin X.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 2 起始页码: 915
结束页码: 928
语种: 英语
英文关键词: Asian dust
; atmospheric loading
; long-distant export
; Siberian High
Scopus关键词: aridity
; climate variation
; eolian deposit
; eolian process
; GIS
; Holocene
; ice core
; marine sediment
; paleoclimate
; snow accumulation
; timescale
; China
; Lake Xiarinur
; Nei Monggol
; Pacific Ocean
; Pacific Ocean (North)
英文摘要: Both paleoclimatic records and models suggest that the dust accumulation in ice cores and marine sediments, which is often regarded as a direct record of changing atmospheric dust loading and used to estimate its climatic impact, is strongly coupled to the aridity of dust source regions. However, the underlying association of this couple has not been tested directly because of the lack of continuous and well-dated independent records of eolian activity in dust source regions. Here we present a high-resolution multiproxy record of the Holocene eolian activity and climate changes from Lake Xiarinur in north China, a major Asian dust source region. Our data, together with the records of Asian dust accumulation in downwind areas, including the North Pacific Ocean and Greenland, suggest a decoupling between long-distant Asian dust export and climatic drying in the Holocene. Although the climate was humid and the eolian activity was weak in the source region during the early Holocene, the dust accumulation in the North Pacific Ocean and Greenland was relatively high. Similarly, while climatic drying and strong eolian activity occurred in north China during the late Holocene, the rate of dust accumulation in the downwind areas was low. The long-distant export of Asian dust is closely correlated with the strength of the Siberian High rather than the westerlies as widely believed before. The rate of dust accumulation in the GISP2 Greenland ice core is comparable in patterns with the intensity of the Siberian High forced eolian activity on both millennial and centennial time scales. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114675
Appears in Collections: 气候减缓与适应
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作者单位: Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China; College of Earth Sciences, University of Chinese Academy of Sciences, Beijing, China; Beijing Institute of Geology, Beijing, China; Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Xu B.,Wang L.,Gu Z.,et al. Decoupling of Climatic Drying and Asian Dust Export During the Holocene[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(2)