摘要
利用云南 1 90 1～ 1 997年的降水量资料 ,研究了云南年、季旱涝时空变化特征。结果表明 :云南主要气候灾害是干旱 ,冬春和初夏干旱是大面积的 ,几乎覆盖全省范围 ,特别是冬春季节 ,平均 1 0年中有 8年为干旱年 ;近百年来云南呈现出明显的干旱化趋势 ,但 90年代中期以后 ,干旱化趋势减弱并有向湿润化气候变化的趋势 ;在较大时间尺度上 ,云南旱涝变化最显著 ,其中 2 0～ 50年代云南气候最干旱 ,60～ 80年代中期则降水量偏多。
Based on Yunnan's precipitation data from 1901～1997, the spatial and temporal distributions of drought and flood in Yunnan are studied. The result shows that the drought is mainly climatic disaster and it takes place the most regions of Yunnan. In winter and spring, eight years out of ten years will be drought years. The climatic changes of Yunnan during the last 100 years are drought, but this tendency of dry climate was descending after 1995. The variations of drought and flood are the significantest on larger time scales. There is the most drought period from 1930 to 1958 and the precipitation is more than its climatic average value from 1959 to 1986 in Yunnan.
出处
《高原气象》
CSCD
北大核心
2000年第1期84-90,共7页
Plateau Meteorology
基金
"九.五"国家重中之重科技项目!云南专题"云南短期气候预测系统的研究"( 96 90 8 0 5 0 8)资助
关键词
旱涝特征
气候变化
云南
降水量
Drought and flood feature Climatic changes Yunnan Province
