气候变化领域集成服务门户(CCPortal): Spatial and temporal variation of drought index in a typical steep alpine terrain in Hengduan Mountains

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DOI	10.1007/s11629-015-3632-5
	Spatial and temporal variation of drought index in a typical steep alpine terrain in Hengduan Mountains
	Zhu Guo-feng; Yang Ling; Qin Da-he; Tong Hua-li; Liu Yuan-feng; Li Jia-fang
发表日期	2016
ISSN	1672-6316
起始页码	1186
结束页码	1199
卷号	13 期号:7
英文摘要	This study describes the spatial and temporal variation of a drought index and makes inferences regarding the environmental factors that influence this variability in the Hengduan Mountains. A drought index is typically used to determine the moisture conditions and the magnitude of water deficiency in a given area. Based on data from 26 meteorological stations over the period 1960-2012, the spatial and temporal variations of the drought index were analyzed using a thin plate smoothing splines method that considered elevation as a covariate. The drought index was estimated based on the potential evapotranspiration (E-0) as defined by the Penman Monteith model modified by FAO (1998). The results of the reported analysis showed that the drought index in the Hengduan Mountains has been decreasing since 1960 at a rate of -0.008/a. This represented a progressive shift from the sub-humid class, which typified the wider area in the Hengduan Mountains, toward the humid class, which appeared in the Hengduan Mountains areas. The drought index was relatively high in the north and low in the south and the variation of the drought index varied with seasons. The drought index showed increasing trends in summer and autumn and it is greater in autumn than in summer, while it showed a decreasing trend in spring and winter. Drought index is inversely proportional to the soil relative humidity and Normalized Difference Vegetation Index (NDVI).
英文关键词	Drought index; Normalized Difference Vegetation index; Evapotranspiration; Thin plate smoothing splines; Hengduan Mountains
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
来源期刊	JOURNAL OF MOUNTAIN SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158550
作者单位	Zhu, GF (corresponding author), Northwest Normal Univ, Coll Geog & Environm Sci, Lanzhou 730070, Peoples R China.; Zhu, GF (corresponding author), Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Cryosphere Sci, Lanzhou 730000, Peoples R China.
推荐引用方式 GB/T 7714	Zhu Guo-feng,Yang Ling,Qin Da-he,et al. Spatial and temporal variation of drought index in a typical steep alpine terrain in Hengduan Mountains[J],2016,13(7).
APA	Zhu Guo-feng,Yang Ling,Qin Da-he,Tong Hua-li,Liu Yuan-feng,&Li Jia-fang.(2016).Spatial and temporal variation of drought index in a typical steep alpine terrain in Hengduan Mountains.JOURNAL OF MOUNTAIN SCIENCE,13(7).
MLA	Zhu Guo-feng,et al."Spatial and temporal variation of drought index in a typical steep alpine terrain in Hengduan Mountains".JOURNAL OF MOUNTAIN SCIENCE 13.7(2016).