DOI: 10.1002/jgrd.50140
论文题名: A 2000-year dust storm record from Lake Sugan in the dust source area of arid China
作者: Chen F. ; Qiang M. ; Zhou A. ; Xiao S. ; Chen J. ; Sun D.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 5 起始页码: 2149
结束页码: 2160
语种: 英语
英文关键词: arid China
; dust storm
; lake sediments
; last two millennia
; Qaidam Basin
Scopus关键词: Dust
; Lakes
; Magnetic susceptibility
; Sedimentology
; Sediments
; Arid China
; Dust storm
; Lake sediments
; last two millennia
; Qaidam basin
; Storms
; arid region
; depositional environment
; dust storm
; eolian process
; exploitation
; grain size
; lacustrine deposit
; lamination
; Little Ice Age
; Northern Hemisphere
; twentieth century
; China
; Qaidam Basin
; Qinghai
; Qinghai-Xizang Plateau
; Sugan Lake
英文摘要: Arid northwestern China is considered to be a major source of atmospheric dust supply to the Northern Hemisphere. However, dust storm evolution and dust emission processes in the past remain unclear due to the scarcity of geologic archives in this region. Hydrologically closed lakes in dust source areas act as a trap, providing the opportunity to trace the history of dust emission or eolian activity. Here we present the results of dust storm proxies and a dust storm history from Lake Sugan in the Qaidam Basin, a dust source area, on the northern Qinghai-Tibetan Plateau. Grain size analyses of the materials deposited during modern dust storms and of the lake surface sediments demonstrate that the coarse component of the lake sediments was transported primarily by ambient winds when dust storms occurred. In combination with a sediment chronology generated by counting annual laminations, a 2000-year dust storm history was reconstructed on the basis of changes in the coarse component and magnetic susceptibility of the lake sediments. Frequent and/or intensive dust storms occurred during the intervals AD 300-500, AD 1180-1240, and AD 1500-1700. The occurrence of dust storms largely coincided with the strengthening of the Siberian High with colder air masses from high latitudes, such as during the Little Ice Age, frequently encroaching into the dust source areas in northwestern China. Our results suggest that wind strength plays an important role in dust emissions in arid source areas. However, dust storms in the late 20th century are most likely associated with disturbance of the ground surface caused by petroleum exploitation in the Qaidam Basin. © 2013. 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/63884
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
There are no files associated with this item.
作者单位: Key Laboratory of Western China's Environmental Systems (MOE), Lanzhou University, No. 222, South Tianshui Road, Lanzhou 730000, China; Climate Center of Shaanxi Meteorological Bureau, Xi'an, China
Recommended Citation:
Chen F.,Qiang M.,Zhou A.,et al. A 2000-year dust storm record from Lake Sugan in the dust source area of arid China[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(5)