气候变化领域集成服务门户(CCPortal): Reduced winter runoff in a mountainous permafrost region in the northern Tibetan Plateau

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DOI	10.1016/j.coldregions.2016.03.007
	Reduced winter runoff in a mountainous permafrost region in the northern Tibetan Plateau
	Gao, Tanguang; Zhang, Tingjun; Cao, Lin; Kang, Shichang; Sillanpaa, Mika
发表日期	2016
ISSN	0165-232X
EISSN	1872-7441
卷号	126
英文摘要	The degradation of mountain permafrost under climate warming may alter the runoff regime of high mountainous catchments. In this study, we evaluated the influence of permafrost on the hydrological regime using hydrological signals in the Yeniugou Basin located in a mountainous permafrost region in the Qilian Mountains of the northern Tibetan Plateau (TP). The effect of permafrost degradation on the hydrological response was assessed based on 28 years of runoff and meteorological data. The results indicated that the investigated region exhibited a large increase in annual surface ground temperature from 1979 to 2006, with almost unchanged precipitation and evaporation potential. The winter runoff levels exhibited a significant decreasing linear trend, whereas the annual runoff and runoff in other seasons did not show any distinct linear trends. According to a comprehensive analysis of the relationships between winter runoff and meteorological factors, the ratio of maximum(Q(max)) and minimum (Q(min)) discharge, the recession coefficient and baseflow separation, and the reduced winter runoff were significantly correlated with thawing of permafrost. However, due to a time-lag response of climate forcing to permafrost thawing, some of these changes are undetectable over a short period. This study provides preliminary data on cold region hydrology and its response to climate change. (C) 2016 Elsevier B.V. All rights reserved.
关键词	Hydrological regime Permafrost degradation Runoff Climate change Tibetan Plateau
学科领域	Engineering; Geology
语种	英语
WOS研究方向	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
来源期刊	COLD REGIONS SCIENCE AND TECHNOLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111844
作者单位	Lanzhou Univ, Coll Earth & Environm Sci, Minist Educ, Key Lab Western Chinas Environm Syst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Gao, Tanguang,Zhang, Tingjun,Cao, Lin,et al. Reduced winter runoff in a mountainous permafrost region in the northern Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2016,126.
APA	Gao, Tanguang,Zhang, Tingjun,Cao, Lin,Kang, Shichang,&Sillanpaa, Mika.(2016).Reduced winter runoff in a mountainous permafrost region in the northern Tibetan Plateau.COLD REGIONS SCIENCE AND TECHNOLOGY,126.
MLA	Gao, Tanguang,et al."Reduced winter runoff in a mountainous permafrost region in the northern Tibetan Plateau".COLD REGIONS SCIENCE AND TECHNOLOGY 126(2016).