气候变化领域集成服务门户(CCPortal): Tree-Ring Inferred Drought Variations in the Source Region of the Yangtze, Yellow, and Mekong Rivers over the Past Five Centuries

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DOI	10.3390/w16081186
	Tree-Ring Inferred Drought Variations in the Source Region of the Yangtze, Yellow, and Mekong Rivers over the Past Five Centuries
	Xing, Pei; Bai, Mengxin; Zhang, Qi-Bin; Lyu, Lixin
发表日期	2024
EISSN	2073-4441
起始页码	16
结束页码	8
卷号	16 期号:8
英文摘要	The climate in the source region of the Yangtze River, Yellow River, and Mekong River is of great research interest because of its sensitivity to global change and its importance in regulating water resources to densely populated and vast areas downstream. A five-century long record of spring (May-June) for the Palmer Drought Severity Index (PDSI) was reconstructed for this region using tree-ring width chronologies of Qilian juniper (Juniperus przewalskii Kom.) from five high-elevation sites. The reconstruction explained 46% variance in the PDSI during the instrumental period 1955-2005. The reconstructed PDSI showed that the occurrence of dry extremes became frequent during the last century relative to the previous four centuries. The standard deviation of the reconstructed PDSI in the 100-year window showed that the recent century held apparent high values of standard deviation in the long-term context. Sustained droughts occurred in periods 1582-1631, 1737-1757, 1772-1791, 1869-1891, 1916-1939, and 1952-1982, whereas relatively wet intervals were observed in 1505-1527, 1543-1564, 1712-1736, 1792-1816, 1852-1868, 1892-1915, and 1983-2008. Notably, in the context of the past five centuries, the study region showed an increased inter-annual variability in the recent century, suggesting an intensified hydroclimatic activity possibly associated with global warming. Moreover, through diagnostic analysis of atmospheric circulation, we found that the negative phase East Asian-Pacific teleconnection pattern may be likely to trigger drought in the study region.
英文关键词	tree-ring width; Qinghai-Tibetan Plateau; PDSI; drought; EAP teleconnection pattern
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
WOS类目	Environmental Sciences ; Water Resources
WOS记录号	WOS:001209924600001
来源期刊	WATER
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/299194
作者单位	Chinese Academy of Sciences; Institute of Botany, CAS
推荐引用方式 GB/T 7714	Xing, Pei,Bai, Mengxin,Zhang, Qi-Bin,et al. Tree-Ring Inferred Drought Variations in the Source Region of the Yangtze, Yellow, and Mekong Rivers over the Past Five Centuries[J],2024,16(8).
APA	Xing, Pei,Bai, Mengxin,Zhang, Qi-Bin,&Lyu, Lixin.(2024).Tree-Ring Inferred Drought Variations in the Source Region of the Yangtze, Yellow, and Mekong Rivers over the Past Five Centuries.WATER,16(8).
MLA	Xing, Pei,et al."Tree-Ring Inferred Drought Variations in the Source Region of the Yangtze, Yellow, and Mekong Rivers over the Past Five Centuries".WATER 16.8(2024).