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.
出处
《灌溉排水学报》
CSCD
北大核心
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)
关键词
标准化降水蒸发指数
时空分布
干旱
standardized precipitation evapo-transpiration index
spatial and temporal distribution
drought
