桂林干旱气候特征分析

Analysis on Characteristic of Drought of Guilin

摘要: 为分析桂林市干旱发生的气候特征，用全市13个站1957~2010年的降水资料，统计旬合计降水量，划分气象干旱等级，对干旱发生的地域分布、发生概率及时间序列变化周期等进行研究。结果是：受天气系统和特殊地形的影响，市区东南部干旱最严重，北部最轻；桂林以秋冬季节干旱为主，春夏季节干旱很少发生；严重干旱具有11年的周期变化特征。

Abstract: For analysis of the climate characteristics of drought occurred in Guilin, we used the precipitation data of 13 stations of Guilin from 1957-2010 years, made ten-day rainfall statistics, divided the meteorological drought levels, studied on the geographical distribution, and occurrence probability, and time series change cycle of drought. The result shows that: By the influence of weather system and special terrain, the drought is most serious in the southeast and lightest in the north; the drought is mainly occurred in autumn and winter, but rarely happened in the spring and sum-mer; severe drought have 11-year periodic change feature.