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Drought variations in the middle Qilian Mountains, northeast Tibetan Plateau,over the last 450 years as reconstructed from tree rings
Sun,JY(Sun,Junyan)[1]; Liu,Y(Liu,Yu)[1,2]
2013
Source PublicationDendrochronologia
Volume31Pages:279-285
Subtype期刊论文
Abstract

Based on the tree-ring width chronology of Sabina przewalskii Kom., a 450-year Palmer Drought Severity Index (PDSI) series was reconstructed in the middle Qilian Mountains, northeast Tibetan Plateau. During the calibration period of 1957–2004, the predictor variable accounts for 47% of the variance in the modeled PDSI data. There were three sustained severe multiyear droughts during the periods of 1705–1723, 1814–1833, and 1925–1941 before the instrumental period of 1957–2004, while no drought event lasting longer than 10 years occurred during the instrumental period. Although the modeled PDSI during the 1957–2004 period adequately assessed the intensity of the multiyear droughts for the last 450 years, the potential for prolonged droughts was underestimated. In the multidecadal scale, the drought of 1640–1730 had the greatest magnitude and the longest duration, the drought of 1808–1846 had the highest intensity, and the drought of 1917–1973 was moderate. Both the multiyear and decadal scale droughts in the middle Qilian Mountains corresponded to the droughts in the northeast Tibetan Plateau, demonstrating that drought occurrences in the northeast Tibetan Plateau are synchronous in decadal to multidecadal scales. The drought variations in the middle Qilian Mountains have significant periodicities of 2.05–2.31, 54.44, 98, and 122.5 years at a 99% confidence level.

KeywordTree-ring Width Chronology Pdsi Qilian Mountains Northeast Tibetan Plateau
DOI10.1016/j.dendro.2012.07.004
Indexed BySCI
Language英语
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10067
Collection现代环境研究室
Corresponding AuthorLiu,Y(Liu,Yu)[1,2]
Affiliation1.The State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075, China;
2.Department of Environmental Science and Technology, School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Recommended Citation
GB/T 7714
Sun,JY,Liu,Y. Drought variations in the middle Qilian Mountains, northeast Tibetan Plateau,over the last 450 years as reconstructed from tree rings[J]. Dendrochronologia,2013,31:279-285.
APA Sun,JY,&Liu,Y.(2013).Drought variations in the middle Qilian Mountains, northeast Tibetan Plateau,over the last 450 years as reconstructed from tree rings.Dendrochronologia,31,279-285.
MLA Sun,JY,et al."Drought variations in the middle Qilian Mountains, northeast Tibetan Plateau,over the last 450 years as reconstructed from tree rings".Dendrochronologia 31(2013):279-285.
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