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[1]CHENG Xiao-xia,FANG Jian-gang,SUN Xian,et al.Analysis on Variation and Sensitivity of Utilizable Precipitation of Shaanxi Province[J].Research of Soil and Water Conservation,2009,16(05):45-50.

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Analysis on Variation and Sensitivity of Utilizable Precipitation of Shaanxi Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 16 Number of periods: 2009 05 Page number: 45-50 Column: Public date: 2009-10-20

Title:: Analysis on Variation and Sensitivity of Utilizable Precipitation of Shaanxi Province

Author(s):: CHENG Xiao-xia¹, FANG Jian-gang¹, SUN Xian¹, LIU Min²; 1. Shaanxi Climate Center, Xi’an 710015, China;
2. Jiangsu Meteorological Agency, Nanjing 210046, China

Keywords:: evaporation; water resource; climate change; sensitivity

CLC:: P426.614

DOI:: -

Abstract:: By using monthly precipitation and temperature received from 74 observed stations from 1960 to 2007 and employed Takahashi’s evaporation equation,we analyze the variability of utilizable precipitation in the past 50 years and discuss the sensitivity of utilizable precipitation to climate change further.The results show as follows: utilizable precipitation is more sufficient in southern regions of Shaanxi than in the north,and more rich in summer and autumn.In the recent 50 years,utilizable precipitation declined with obvious interdecadal variation,for example,utilizable precipitation is higher in 1960s and 1980s,but lower in 1990s.The study of sensitivity indicates that the influence of climate change on utilizable precipitation is the most significant in winter and feeblest in summer; in different regions,the response of utilizable precipitation is more significant in the north than in the south of Shaanxi.Moreover,the change of precipitation leads to more notable utilizable precipitation variation than temperature; the more significantly the temperature or precipitation changes,the more sensitively the utilizable precipitation changes.Also,temperature could have bigger effects on utilizable precipitation when the precipitation is increasing,and the utilizable precipitation is more sensitive to precipitation change with the increase of temperature.

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