on precipitation climatology of afghanistan

daily precipitation data from aphrodite's resources with a spatial resolution of 0.25*0.25 degree for 57 years have been used to detect the trend of precipitation in afghanistan. first of all, monthly, seasonally, and yearly maps and regional mean time series calculated. according to the annual map, mean annual precipitation of the country is about 256 mm. there are two precipitation maxima in afghanistan, one in eastern part and the other one is north- eastern of the country. throughout the country precipitation maxima occurs in winter. the trend of time series with validity levels of %95 and %99 were examined by the use of mann kendall nonparametric. trend analysis of annual time series shows no trend.