Abstract:

The precipitation change analysis in Kailu country in recent 55 years Jiang Xiuping1 Li Chunyun2 Song Yuhong2 Wang Lijuan 1 Zhang Li 2 (1 Kailu country Meteorological Bureau of Inner Mongolia , Kailu , 028400. 2 Tongliao Meteorological Bureau of Inner Mongolia .) Abstract: Use the monthly and daily rainfall data in Kailu reference climate station from 1953 to 2007, use of linear change, the cumulative anomaly, SNR, F test for analysis. Show as a result: (1) The rainfall in Kailu country shows a decreasing trend, annual rainfall tendency rate is -11.1mm/10a, cumulative annual reducing is 61.0mm in 55 years, reducing seasons are in summer and autumn ; stage is clear, it is in a less rain stage now, it is the least period of rainfall. (2) The days of rain, rainfall and percentage of total rainfall over middle rain are decreasing trend, ,they are 0.10 and 0.05 above the level of reliability respectively ; the largest cumulative amount of rainfall shows also a decreaseing trend, so the drought degree in Kailu County is increasing.