DOI: 10.1016/j.atmosres.2018.12.030
Scopus记录号: 2-s2.0-85059621217
论文题名: Variation in atmospheric dust since 1950 from an ice core in the Central Tibetan Plateau and its relationship to atmospheric circulation
作者: Li P. ; Wu G. ; Zhang X. ; Yan N. ; Zhang X.
刊名: Atmospheric Research
ISSN: 1698095
出版年: 2019
卷: 220 起始页码: 10
结束页码: 19
语种: 英语
英文关键词: Atmospheric circulation
; Atmospheric dust
; Ice core records
; Tibetan Plateau
Scopus关键词: Climate change
; Deposition
; Dust
; Ice
; Storms
; Atmospheric circulation
; Atmospheric dust
; Central Tibetan plateau
; Dust concentrations
; Ice core records
; Meteorological station
; Positive correlations
; Tibetan Plateau
; Loading
; aridity
; atmospheric circulation
; concentration (composition)
; correlation
; dust
; grain size
; ice core
; wind
; China
; Qinghai-Xizang Plateau
; Taklimakan Desert
; Xinjiang Uygur
英文摘要: Variation in atmospheric dust deposited on the Tibetan Plateau (TP) and its response to climate change are not well understood. In this study, a 65-year annually resolved (1950–2014) atmospheric dust proxy record is presented from the Mugagangqiong (MGGQ) ice core in the central Tibetan Plateau. There is a significant positive correlation between the dust concentration of the MGGQ ice core and dust days observed from meteorological stations in the Taklimakan Desert (r = 0.47, p < 0.001) and the central TP (r = 0.50, p < 0.001), indicating that the MGGQ dust record provides a good proxy for reconstructing an annual history of atmospheric dust-loading in this region. Two periods of enhanced dust deposition, (1962–1968 and 1975–1987), characterised by high concentrations and coarse grain size, suggest enhanced aridity, strong winds and active dust storm events. The lowest dust deposition period was identified as being between 1988 and 2000. Here we utilise 1975–1987 and 1988–2000 as typical high and low dust-loading periods, respectively, to discuss the possible dust mechanisms with the JRA-55 reanalysis data. During the high dust-loading period, dust concentration and flux were positively correlated with the mid-latitude zonal wind, suggesting that the high-level westerlies strengthened in northwestern China and transported more dust to the central TP than during the low dust-loading period. Dust concentration and flux decreased from the late 1980s and were positively correlated with weakened zonal winds and negatively correlated with precipitation in northwestern China from 1988 to 2000. Weakening westerlies and increasing precipitation at the dust source areas were responsible for this decrease in dust-loading during this period. © 2018 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122310
Appears in Collections: 气候变化事实与影响
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作者单位: Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences (CAS), Beijing, 100101, China; University of Chinese Academy of Sciences, Beijing, 100049, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, 100101, China; Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130102, China
Recommended Citation:
Li P.,Wu G.,Zhang X.,et al. Variation in atmospheric dust since 1950 from an ice core in the Central Tibetan Plateau and its relationship to atmospheric circulation[J]. Atmospheric Research,2019-01-01,220