陕西2012年极端天气气候事件与气象灾害

Extreme Weather and Climate Events and Meteorological Disasters in Shaanxi Province in 2012

利用极端天气气候事件监测系统监测结果,分析了陕西1981-2012年极端天气气候事件出现次数和强度,发现2012年陕西极端天气气候事件次数少于多年平均值,但华阴7月2-4日、佳县7月24-28日极端降水事件强度之大,为历史罕见,佳县27日降水量、26-28日3d降水量均超过百年一遇的水平,造成严重人员伤亡和经济损失。说明即便是在极端天气气候事件出现次数少,气候年景较好的年份,局地也会出现历史罕见的极端事件和灾害。此外,还分析了极端天气气候事件次数与灾情年景评估指数之间的相关性。

Based on the results from the extreme weather and climate events monitoring platform, the counts and intensity of extreme weather and climate events from 1981 to 2012 are analyzed. Times of extreme events in 2012 is less than the long-time average annual value. However, there are some infrequent events in 2012. For ex- ample, the precipitation intensity from 2 to 4 in July in Huayin and from 24 to 28 in July in Jiaxian is rare. The precipitation on 27 July and from 26 to 28 in July exceeds a-hundred-year return period probability, resulted in a great causulty and ecnomic loss. These results show that even if it is a good year, the unusual extreme event and disaster would emerge in some areas too. Meanwhile the relationship between extreme events time and the disaster is discussed.