气候变化领域集成服务门户(CCPortal): Teleconnection patterns of precipitation in the Three-River Headwaters region, China

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DOI	10.1088/1748-9326/aba8c0
	Teleconnection patterns of precipitation in the Three-River Headwaters region, China
	Dong Y.; Zhai J.; Zhao Y.; Li H.; Wang Q.; Jiang S.; Chang H.; Ding Z.
发表日期	2020
ISSN	17489318
卷号	15 期号:10
英文摘要	With the intensification of global warming, spatiotemporal variations in the climate and their mechanisms have received increasing attention. Currently, the relationship between regional precipitation regime, large-scale circulation, and topography, particularly in high-altitude areas such as the Qinghai–Tibet Plateau, are not well understood. Herein, the spatial and temporal variability in the annual and intra-annual (wet and dry periods) precipitation at 33 stations in the Three-River Headwaters (TRH) region from 1967 to 2016 are analysed. Moreover, the empirical orthogonal function and wavelet transform coherence methods are used to analyse the relationships between the different modes of precipitation change and 14 atmospheric circulation indices. The following results were obtained. (1) The mean annual precipitation and mean dry period precipitation significantly increased over the studied period. Annual and intra-annual precipitation showed a spatial southeast-to-northwest decreasing trend. (2) Two main patterns of precipitation were observed during the studied period: a dominant pattern with high- and low-value centres located in southeast and northwest TRH, respectively, and a dipole pattern with more precipitation over southwest TRH and less precipitation over northeast TRH. (3) Precipitation had a negative correlation with latitude, positive correlation with longitude, and nonlinear relationship with elevation. (4) Precipitation changes over various parts of the studied domain were determined based on changes in the weather systems affecting the area, with different indices being correlated with different components during different times of the year. © 2020 The Author(s).
英文关键词	Empirical orthogonal functions analysis; Large-scale atmospheric circulation; Precipitation; Spatiotemporal variation; Three-river headwater region; Wavelet transform coherence
语种	英语
scopus关键词	Drought; Global warming; Topography; Wavelet transforms; Atmospheric circulation; Empirical Orthogonal Function; Large-scale circulation; Mean annual precipitation; Non-linear relationships; Spatial and temporal variability; Spatio-temporal variation; Teleconnection patterns; Orthogonal functions; annual variation; atmospheric circulation; correlation; empirical orthogonal function analysis; global warming; precipitation (climatology); spatiotemporal analysis; topography; trend analysis; wavelet analysis; China; Qinghai-Xizang Plateau
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153612
作者单位	Department of Hydraulic Engineering, Tsinghua University, Beijing, 100084, China; State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, 100038, China; Engineering Center of Desertification, Blown-Sand Control of Ministry of Education, Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, China
推荐引用方式 GB/T 7714	Dong Y.,Zhai J.,Zhao Y.,et al. Teleconnection patterns of precipitation in the Three-River Headwaters region, China[J],2020,15(10).
APA	Dong Y..,Zhai J..,Zhao Y..,Li H..,Wang Q..,...&Ding Z..(2020).Teleconnection patterns of precipitation in the Three-River Headwaters region, China.Environmental Research Letters,15(10).
MLA	Dong Y.,et al."Teleconnection patterns of precipitation in the Three-River Headwaters region, China".Environmental Research Letters 15.10(2020).