The paper Based on the 1959 to 2008 data of precipitation in Huhhot,used Precipitation anomaly percentage and linear analysis methods to analyze trends in drought Hohhot,found that the following characteristics:(1) precipitation variability rate is high,drought frequency as high as 44.
以内蒙古呼和浩特市50年(1959-2008年)降水资料为基础,以降水量距平百分率气象干旱标准为依据,运用线性分析法,研究呼和浩特市干旱的变化趋势,发现呼和浩特市干旱存在以下特征:(1)呼和浩特市降水变率大,干旱发生频率高达44。