气候变化领域集成服务门户(CCPortal): A shift in cloud cover over the southeastern Tibetan Plateau since 1600: evidence from regional tree-ring delta O-18 and its linkages to tropical oceans

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DOI	10.1016/j.quascirev.2014.01.009
	A shift in cloud cover over the southeastern Tibetan Plateau since 1600: evidence from regional tree-ring delta O-18 and its linkages to tropical oceans
	Liu, Xiaohong; Xu, Guobao; Griessinger, Jussi; An, Wenling; Wang, Wenzhi; Zeng, Xiaomin; Wu, Guoju; Qin, Dahe
发表日期	2014
ISSN	0277-3791
起始页码	55
结束页码	68
卷号	88
英文摘要	We studied the climatic significance and potential forcing of regional tree-ring delta O-18 across the southeastern Tibetan Plateau from 1600 to 2009. Three normalized tree-ring delta O-18 time series showed high signal coherence at both low and high frequencies. A 400 years composite tree-ring delta O-18 chronology in southeastern Tibetan Plateau was established by averaging Z-score method. The composite delta O-18 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 delta O-18 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 26 degrees N and 34 degrees N and between 89 degrees E and 103 degrees E 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 Nifio-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 6180 series was temporally unstable. Our comparisons among different proxies highlight that a tree-ring delta O-18 network has great potential to reveal common low-frequency climatic signals in monsoon Asia over long time scales. Crown Copyright (c) 2014 Published by Elsevier Ltd. All rights reserved.
英文关键词	Tree-ring delta O-18; Southeastern Tibetan Plateau; Hydroclimate; Sea surface temperature; ENSO; Asian monsoon
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
来源期刊	QUATERNARY SCIENCE REVIEWS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158595
作者单位	Liu, XH (corresponding author), Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Cryospher Sci, 320 Donggang West Rd, Lanzhou 730000, Peoples R China.
推荐引用方式 GB/T 7714	Liu, Xiaohong,Xu, Guobao,Griessinger, Jussi,et al. A shift in cloud cover over the southeastern Tibetan Plateau since 1600: evidence from regional tree-ring delta O-18 and its linkages to tropical oceans[J],2014,88.
APA	Liu, Xiaohong.,Xu, Guobao.,Griessinger, Jussi.,An, Wenling.,Wang, Wenzhi.,...&Qin, Dahe.(2014).A shift in cloud cover over the southeastern Tibetan Plateau since 1600: evidence from regional tree-ring delta O-18 and its linkages to tropical oceans.QUATERNARY SCIENCE REVIEWS,88.
MLA	Liu, Xiaohong,et al."A shift in cloud cover over the southeastern Tibetan Plateau since 1600: evidence from regional tree-ring delta O-18 and its linkages to tropical oceans".QUATERNARY SCIENCE REVIEWS 88(2014).