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DOI	10.1016/j.atmosres.2018.12.030
	Variation in atmospheric dust since 1950 from an ice core in the Central Tibetan Plateau and its relationship to atmospheric circulation
	Li P.; Wu G.; Zhang X.; Yan N.; Zhang X.
发表日期	2019
ISSN	0169-8095
起始页码	10
结束页码	19
卷号	220
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
英文关键词	Atmospheric circulation; Atmospheric dust; Ice core records; Tibetan Plateau
语种	英语
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
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162138
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
推荐引用方式 GB/T 7714	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],2019,220.
APA	Li P.,Wu G.,Zhang X.,Yan N.,&Zhang X..(2019).Variation in atmospheric dust since 1950 from an ice core in the Central Tibetan Plateau and its relationship to atmospheric circulation.Atmospheric Research,220.
MLA	Li P.,et al."Variation in atmospheric dust since 1950 from an ice core in the Central Tibetan Plateau and its relationship to atmospheric circulation".Atmospheric Research 220(2019).