Analysis of Drought Characteristic in Sunit Prairie Based on Precipitation Anomaly Percentage during 2000-2015

摘要

According to the monthly precipitation data collected from three meteorological stations i n Xilingol League from 2000 to 2015, annua 1 and seasonal drought features in Sunit prair ie for 16 years were detailed analysis by usi ng precipitation anomaly percentage from the drought frequency and the changing trends of drought. The results show that the freque ncy of annual precipitation had increased ten dency in Sunit prairie from 2000 to 2015, th e precipitation tendency was 6077/10a; Preci pitation showed a significantly decreasing tre nds in spring, summer and winter, and the i ncreasing trend of precipitation in autumn; F or annual and seasonal scale, the frequency of light drought was higher.