气候变化领域集成服务门户(CCPortal): Variation of Thornthwaite moisture index in Hengduan Mountains, China

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DOI	10.1007/s11769-016-0820-3
	Variation of Thornthwaite moisture index in Hengduan Mountains, China
	Zhu Guofeng; Qin Dahe; Tong Huali; Liu Yuanfeng; Li Jiafang; Chen Dongdong; Wang Kai; Hu Pengfei
发表日期	2016
ISSN	1002-0063
起始页码	687
结束页码	702
卷号	26 期号:5
英文摘要	The Thornthwaite moisture index, an index of the supply of water (precipitation) in an area relative to the climatic demand for water (potential evapotranspiration), was used to examine the spatial and temporal variation of drought and to verify the influence of environmental factors on the drought in the Hengduan Mountains, China. Results indicate that the Thornthwaite moisture index in the Hengduan Mountains had been increasing since 1960 with a rate of 0.1938/yr. Annual Thornthwaite moisture index in Hengduan Mountains was between -97.47 and 67.43 and the spatial heterogeneity was obvious in different seasons. Thornthwaite moisture index was high in the north and low in the south, and the monsoon rainfall had a significant impact on its spatial distribution. The tendency rate of Thornthwaite moisture index variation varied in different seasons, and the increasing trends in spring were greater than that in summer and autumn. However, the Thornthwaite moisture index decreased in winter. Thornthwaite moisture index increased greatly in the north and there was a small growth in the south of Hengduan Mountains. The increase of precipitation and decrease of evaporation lead to the increase of Thornthwaite moisture index. Thornthwaite moisture index has strong correlation with vegetation coverage. It can be seen that the correlation between Normalized Difference Vegetation Index (NDVI) and Thornthwaite moisture index was positive in spring and summer, but negative in autumn and winter. Correlation between Thornthwaite moisture index and relative soil relative moisture content was positive in spring, summer and autumn, but negative in winter. The typical mountainous terrain affect the distribution of temperature, precipitation, wind speed and other meteorological factors in this region, and then affect the spatial distribution of Thornthwaite moisture index. The unique ridge-gorge terrain caused the continuity of water-heat distribution from the north to south, and the water-heat was stronger than that from the east to west part, and thus determined the spatial distribution of Thornthwaite moisture index. The drought in the Hengduan Mountains area is mainly due to the unstable South Asian monsoon rainfall time.
英文关键词	Thornthwaite moisture index; Normalized Difference Vegetation Index (NDVI); Kriging interpolation; Hengduan Mountains
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
来源期刊	CHINESE GEOGRAPHICAL SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158544
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 Guofeng,Qin Dahe,Tong Huali,et al. Variation of Thornthwaite moisture index in Hengduan Mountains, China[J],2016,26(5).
APA	Zhu Guofeng.,Qin Dahe.,Tong Huali.,Liu Yuanfeng.,Li Jiafang.,...&Hu Pengfei.(2016).Variation of Thornthwaite moisture index in Hengduan Mountains, China.CHINESE GEOGRAPHICAL SCIENCE,26(5).
MLA	Zhu Guofeng,et al."Variation of Thornthwaite moisture index in Hengduan Mountains, China".CHINESE GEOGRAPHICAL SCIENCE 26.5(2016).