滇中干旱时空分布及其演变规律研究  

The Spatio-temporal Distribution and Evolution of Drought in Dianzhong

作　　者：高瑞[1] 王龙 雷腾云[1] 王莹[1] 

机构地区：[1]云南农业大学水利学院,昆明650201

出　　处：《灌溉排水学报》2015年第6期95-98,共4页Journal of Irrigation and Drainage

基　　金：公益性行业(水利)科研专项(201001044);国家科技支撑计划项目(2012BAD40B00)

摘　　要：根据滇中及其周边54个气象站1971—2011年的月降水、气温资料,以标准化降水蒸发指数(SPEI)作为干旱指标,根据SPEI的总体变化趋势、周期特征、持续性及空间分布型,分析滇中地区干旱的时空分布及演变特征。结果表明,过去41a,滇中SPEI处于下降趋势并存在6、11a的周期变化,且在未来一段时间内具有持续性;SPEI在空间上具有较好的一致性,表现为总体一致性,说明尽管滇中地区气候差异较大,但干旱的发生在一定程度上还是受某些共同因子的影响和控制。According to the monthly data of precipitation and temperature collected from 54 meteorological stations of dianzhong from 1971 to 2012, with SPEI as drought index, spatio-temporal characteristic was analyzed based on the change of SPEI, period character, persistent and spatial distribution. The results showed that annual SPEI had the decreasing trend and had the periods of 6 years and 11 years, and had continuity in the next period of time; Good agreement of SPEI in space showed general uniform type. which the drought occurred in a certain extents was influenced and controlled by some common factors, though large regional difference in climate.

关 键 词：标准化降水蒸发指数 时空分布 干旱 

分 类 号：P426.616[天文地球—大气科学及气象学]