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题名: Long-term trends of dust events over Tibetan Plateau during 1961-2010
作者: Kang, LT; Huang, JP(黄建平); Chen, SY; Wang, X
收录类别: SCIE ; EI ; BIOSIS
出版日期: 2016-01
刊名: ATMOSPHERIC ENVIRONMENT
卷号: 125, 页码:188-198
出版者: ELSEVIER
出版地: OXFORD
英文摘要: In this study we analyzed dust events records of surface meteorological stations on Tibetan Plateau (TP) during 1961-2010 and provided the spatial and temporal distribution of dust events. The occurrence of dust events has significantly decreased since the 1970s. We defined the Tibetan Plateau Dust Index (TPDI) for the most dust active periods, spring and winter, to characterize the large scale variability of dust events over TP. Mann-Kendall test suggested the decreasing trend was possibly an abrupt change in the 1990s. The decline of surface wind speeds could partly explain the decrease of dust events over TP. TPDI is positively correlated to the surface winds, with correlation coefficients of 0.42 for spring and 0.46 for winter, respectively. The averaged number days with strong winds (wind speed greater than 6.5 ms(-1)) for the 4 selected stations, which were chosen to define TPDI, are significantly correlated with TPDI for both spring (correlation coefficient = 0.69) and winter (correlation coefficient = 0.76) and also showed a deceasing trend. The upward trend of vegetation cover was indicated by the normalized difference vegetation index (NDVI), which can be attributed as another factor driving the decrease of dust events over TP. TPDI is negatively correlated to the NDVI, with correlation coefficients of -0.48 for spring and -0.29 for winter. Additionally, analysis of geopotential height fields and wind fields indicate an enhanced ridge in the north of TP and weakened westerly jet in the low-frequency years of dust events, which also drive the decline of dust events over TP. (C) 2015 The Authors. Published by Elsevier Ltd.
关键词: Tibetan Plateau ; Dust event ; Plateau dust index ; Wind ; NDVI
作者部门: [Kang, Litai ; Huang, Jianping ; Chen, Siyu ; Wang, Xin] Lanzhou Univ, Minist Educ, Key Lab Semiarid Climate Change, Coll Atmospher Sci, Lanzhou 730000, Gansu, Peoples R China
通讯作者: Huang, JP (reprint author), Lanzhou Univ, Minist Educ, Key Lab Semiarid Climate Change, Lanzhou 730000, Gansu, Peoples R China.
学科分类: Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences
文章类型: Article
所属项目编号: National Natural Science Foundation of China [41405003] ; Fundamental Research Funds for the Central Universities [LZUjbky-2015-10]
所属项目名称: 国家自然科学基金项目 ; 中央高校基本科研业务费专项资金
项目资助者: NSFC ; LZU
语种: 英语
DOI: 10.1016/j.atmosenv.2015.10.085
ISSN号: 1352-2310
WOS记录号: WOS:000367636500019
EI记录号: 20154801602198
BIOSIS记录号: BCI:BCI201600160211
IR记录号: WOS:000367636500019
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/182646
Appears in Collections:大气科学学院_期刊论文

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Recommended Citation:
Kang, LT,Huang, JP,Chen, SY,et al. Long-term trends of dust events over Tibetan Plateau during 1961-2010[J]. ATMOSPHERIC ENVIRONMENT,2016,125:188-198.
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