Journal of Geographical Sciences >
Spatial distribution and temporal trends in potential evapotranspiration over Hengduan Mountains region from 1960 to 2009
Received date: 2011-08-01
Revised date: 2011-09-28
Online published: 2011-12-26
Supported by
National Basic Research Program of China, No.2010CB951404; National Natural Science Foundation of China (NSFC), No.40971019; No.90511007; No.40801028; National Basic Research Program of China, No.2007CB411501; NSFC, No.J0630966; Major Directionality Program of the Chinese Academy of Sciences, No.KZCXZ-YW-317; West Light Foundation of the Chinese Academy of Sciences, No.O828A11001
Based on the meteorological data of 20 stations in the Hengduan Mountains region during 1961-2009, the annual and seasonal variation of potential evapotranspiration was analyzed in combination with the Penman-Monteith model. With the method of Spline interpolation under ArcGIS, the spatial distribution of potential evapotranspiration was presented to research the regional difference, and the correlation analysis was used to discuss the dominant factor affecting the potential evapotranspiration. The results indicated that the annual potential evapotranspiration showed a decreasing tendency since the 1960s, especially from the 1980s to 1990s, while it showed an increasing tendency since 2000. Regional potential evapotranspiration showed a rate of -0.17 mm a-1. Potential evapotranspiration in north, middle and south of the Hengduan Mountains exhibited decreasing trends over the studied period, and its regional trend was on the decline from southwest to northeast.
ZHU Guofeng, HE Yuanqing, PU Tao, WANG Xufeng, JIA Wenxiong, LI Zongxing, XIN Huijuan . Spatial distribution and temporal trends in potential evapotranspiration over Hengduan Mountains region from 1960 to 2009[J]. Journal of Geographical Sciences, 2012 , 22(1) : 71 -85 . DOI: 10.1007/s11442-012-0912-7
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