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The Shiyang River Basin in Gansu Province is located in a semiarid area of northwestern China. In the context of global warming, the intensity and frequency of the drought in the area have experienced significant changes, which brings serious influences to agriculture in the area. The area of the drought in Shiyang River Basin was expanding in the past 50 years. So the drought has become one of the key and hot topics in climate change research, especially in a semiarid area of northwestern China in recent year. , and it is necessary to choose a more effective method to analyze temporal and spatial distribution of drought. Based on the observed data of 5 meteorological stations from 1962 to 2010, the method of a series of mathematical statistic theory, GIS spatial analysis techniques and a composite index ( CI) of the meteorological drought was applied to analyze the temporal and spatial characteristics of the drought in the area. According to the national standard

第 ３７ 卷第 １９ 期 ２０１７ 年 １０ 月 生 态 学 报 ＡＣＴＡ ＥＣＯＬＯＧＩＣＡ ＳＩＮＩＣＡ Ｖｏｌ．３７，Ｎｏ．１９ Ｏｃｔ．，２０１７ ｈｔｔｐ： ／ ／ ｗｗｗ．ｅｃｏｌｏｇｉｃａ．ｃｎ 基金项目：国家自然科学基金项目(４１５６１０２４) ；高校博士学科点专项科研基金项目( ２０１３６２０３１１０００２) ；山西省高等学校哲学社会科学研究项目 (２０１５２６５) 收稿日期：２０１６• ０７• ０９； 网络出版日期：２０１７• ０５• ２７ * 通讯作者 Ｃｏｒｒｅｓｐｏｎｄｉｎｇ ａｕｔｈｏｒ．Ｅ•ｍａｉｌ： ｚｈａｎｇｂｏ＠ ｎｗｎｕ．ｅｄｕ．ｃｎ ＤＯＩ： １０．５８４６ ／ ｓｔｘｂ２０１６０７０９１４０９ 贾艳青， 张勃，张耀宗，唐敏，马彬，王国强．长江三角洲地区极端气温事件变化特征及其与 ＥＮＳＯ 的关系．生态学报，２０１７，３７(１９) ：６４０２• ６４１４． Ｊｉａ Ｙ Ｑ， Ｚｈａｎｇ Ｂ， Ｚｈａｎｇ Ｙ Ｚ， Ｔａｎｇ Ｍ， Ｍａ Ｂ， Ｗａｎｇ Ｇ Ｑ．Ｃｏｒｒｅｌａｔｉｏｎ ａｎａｌｙｓｉｓ ｏｆ ｖａｒｉａｔｉｏｎ ｏｆ ｅｘｔｒｅｍｅ ｔｅｍｐｅｒａｔｕｒｅ ｅｖｅｎｔｓ ａｎｄ Ｅｌ Ｎｉñｏ Ｓｏｕｔｈｅｒｎ Ｏｓｃｉｌｌａｔｉｏｎ ( ＥＮＳＯ) ｉｎ Ｙａｎｇｔｚｅ Ｒｉｖｅｒ Ｄｅｌｔａ ｒｅｇｉｏｎ ｄｕｒｉｎｇ １９６０-２０１４．Ａｃｔａ Ｅｃｏｌｏｇｉｃａ Ｓｉｎｉｃａ，２０１７，３７(１９) ：６４０２• ６４１４． 关键词：极端气温指数；空间分布；气候变化；ＥＮＳＯＣｏｒｒｅｌａｔｉｏｎ ａｎａｌｙｓｉｓ ｏｆ ｖａｒｉａｔｉｏｎ ｏｆ ｅｘｔｒｅｍｅ ｔｅｍｐｅｒａｔｕｒｅ ｅｖｅｎｔｓ ａｎｄ Ｅｌ Ｎｉñｏ Ｓｏｕｔｈｅｒｎ Ｏｓｃｉｌｌａｔｉｏｎ( ＥＮＳＯ) ｉｎ Ｙａｎｇｔｚｅ Ｒｉｖｅｒ Ｄｅｌｔａ ｒｅｇｉｏｎ ｄｕｒｉｎｇ １９６０-２０１４

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