A shift in cloud cover over the southeastern tibetan plateau since 1600: Evidence from regional tree-ring 18O and its linkages to tropical oceans (EI)

CORC > 寒区旱区环境与工程研究所 > 中科院寒区旱区环境与工程研究所（未分类） > 期刊论文

	A shift in cloud cover over the southeastern tibetan plateau since 1600: Evidence from regional tree-ring 18O and its linkages to tropical oceans (EI)
	Liu X. ; Xu G. ; Griecinger J. ; An W. ; Wang W. ; Zeng X. ; Wu G. ; Qin D.
刊名	Quaternary Science Reviews
	2014
卷号	88 期号:55-68
英文摘要	We studied the climatic significance and potential forcing of regional tree-ring 18O across the southeastern Tibetan Plateau from 1600 to 2009. Three normalized tree-ring 18O time series showed high signal coherence at both low and high frequencies. A 400 years composite tree-ring 18O chronology in southeastern Tibetan Plateau was established by averaging Z-score method. The composite 18O chronology showed that climate changed since 1860, causing a shift in the hydroclimatic regime and in the influence of regional atmospheric circulation. Spatial correlation analysis revealed that tree-ring 18O was significantly negatively correlated with moisture conditions, and especially with cloud cover during wet summers; the strongest correlation was found for the June to August period. Our regional cloud cover reconstruction for June-August period between 26N and 34N and between 89E and 103E explained 37.6% of the variation from 1953 to 2009. The climate conditions from 1600 to 1860 (the Little Ice Age) were cold and cloudy, but thereafter became sunnier and warmer. Hydroclimatic variations in this region are primarily affected by atmospheric processes in the tropical Indian Ocean and in the East Pacific Ocean, linked to the El Nino-Southern Oscillation (ENSO). The cloud cover over the southeastern Tibetan Plateau is modulated more strongly by sea surface temperatures in the Indian Ocean than over the Pacific Ocean, suggesting low-frequency responses to anomalous ocean warming. The impact of ENSO on regional tree-ring 18O series was temporally unstable. Our comparisons among different proxies highlight that a tree-ring 18O network has great potential to reveal common low-frequency climatic signals in monsoon Asia over long time scales. 2014.
收录类别	EI
公开日期	2015-12-24
内容类型	期刊论文
源URL	[http://ir.casnw.net/handle/362004/25233]
专题	寒区旱区环境与工程研究所_中科院寒区旱区环境与工程研究所（未分类）_期刊论文
推荐引用方式 GB/T 7714	Liu X.,Xu G.,Griecinger J.,et al. A shift in cloud cover over the southeastern tibetan plateau since 1600: Evidence from regional tree-ring 18O and its linkages to tropical oceans (EI)[J]. Quaternary Science Reviews,2014,88(55-68).
APA	Liu X..,Xu G..,Griecinger J..,An W..,Wang W..,...&Qin D..(2014).A shift in cloud cover over the southeastern tibetan plateau since 1600: Evidence from regional tree-ring 18O and its linkages to tropical oceans (EI).Quaternary Science Reviews,88(55-68).
MLA	Liu X.,et al."A shift in cloud cover over the southeastern tibetan plateau since 1600: Evidence from regional tree-ring 18O and its linkages to tropical oceans (EI)".Quaternary Science Reviews 88.55-68(2014).