中文摘要：

21世纪以来,云南省频繁发生春旱,严重影响了人类活动与自然环境.为更科学地抗旱防旱,运用MODIS遥感数据,计算归一化干旱指数NDDI,分析了云南省2004—2013年春旱的时空变化特征.结果表明：研究期内,云南省春旱反复发生,空间差异增大,其中2010、2013年旱情较为严重;云南省东部、北部旱情严重,西南部较轻微;NDDI高值区集中于东南部与中北部,低值区集中于西北部与东北部;10年间云南北部地区旱情严重加剧,南部则有所缓解;易旱植被类型主要为草原和耕地.

英文摘要：

Since the twenty-first Century, the frequent occurrence of drought in Yunnan Province has exerted increasing spatial variability.The droughts that occurred in 2010 and 2013 are the most serious.Drought in eastern and northern part of Yunnan Province was severe kind, while that in southwest was slight. High value areas of ND- DI appear in the southeastern and central north,while low value areas in the northwest and northeast.During recent 10 years, drought has aggravated in northern Yunnan, and mitigated in southern Yunnan.