近40年广西石漠化地区气候变化特征分析

Analysis on Climate Variation Characteristics of Rocky Desertification Region of Guangxi in Recent 40 years

利用广西石漠化片区1971-2010年气象观测资料,分析了近40年来气温、降水等气象要素的变化特征。结果显示:广西石漠化片区平均年降水量呈不显著的减少趋势,具有明显的阶段性变化特征,年际变化较大,春秋季降水量呈减少趋势而夏冬季呈增多趋势;年总暴雨日数呈微弱的增加趋势;年平均气温呈明显上升趋势,其中秋季气温上升最为明显;高温日数呈明显增多趋势。

Based on meteorological observations data of Guangxi rocky desertification region during 1971-2010, variation characteristics of temperature, precipitation and other meteorological elements in recent 40 years are analyzed. Results show that, in Guangxi rocky desertification region, the decreasing trend of the annual precipitation is not significant, but have obvious periodic variation features and large interannual variation. Precipitation over spring and autumn shows decreasing trend, while the precipitation over summer and winter increase. The increasing trend in the number of heavy rain days is not obvious. The annual average temperature shows a significant increasing trend, with the max rising trend over autumn, second over winter. The increasing trend in the number of high temperature days is obvious.