气象与环境学报Issue(5)：141-146,6.DOI:10.3969/j.issn.1673-503X.2015.05.020
1961-2010年云南省基于 SPEI 的干旱变化特征分析
Characteristics of drought based on standardized precipitation evapotranspiration index from 1961 to 2010 in Yunnan province
摘要
Abstract
Based on monthly precipitation and air temperature data at 29 weather stations in Yunnan province from 1961 to 2010,mean SPEI-12 (standardized precipitation evapotranspiration index)was calculated by a new drought index SPEI which is a multi-timescale drought index not only considering precipitation but also air temper-ature.Characteristics of drought evolution,drought occurrence frequency,drought duration and dry-wet change pe-riod in Yunnan province were analyzed.The results indicate that duration and degree of drought in Yunnan prov-ince increase significantly since the 21st century,especially in the northeast and southeast.Precipitation is the main factor affecting drought,and rising temperature strengthens drought in Yunnan province.During the first decade in the 21st century,the total number of drought events and the number of severe and above degree drought events are in significantly increasing trends.Drought duration more than 6 months often occurs in Yunnan province.An oscil-lation period of dry-wet change is about 5 years by a wavelet analysis,and it is estimated that it will be the dry pe-riod in the next few years.关键词
标准化降水蒸散指数/干旱/小波分析Key words
SPEI (standardized precipitation evapotranspiration index)/Drought/Wavelet analysis分类
天文与地球科学引用本文复制引用
张雷,王杰,黄英,吴灏,段琪彩..1961-2010年云南省基于 SPEI 的干旱变化特征分析[J].气象与环境学报,2015,(5):141-146,6.基金项目
云南省科技计划项目（2012CA021）和云南省发改委农村经济处项目（201306）共同资助。 （）
