沙漠与绿洲气象Issue(2)：24-30,7.DOI:10.3969/j.issn.1002-0799.2015.02.004
呼伦贝尔市汛期短时强降水特征
Characteristics analysis of short time heavy rainfall during the rainy season in Hulun Buir
摘要
Abstract
Base on the hourly precipitation data collected from 16 stations during the rainy reason (from June to August)over Hulun Buir city from 1991 to 2013, a threshold value was defined for each stations by the method of threshold value and characteristics of short time heavy rainfall (STHR) were analyzed by Empirical Orthogonal Function (EOF) analysis methods . The results show: The spatial distribution characteristic of the threshold value, events and rain intensity of STHR decrease from west to southeast, the strong center area is in Arongqi of the southeast of Hulun Buir and the spatial distribution characteristic of STHR is the closest relationship with the terrain. The total precipitation of STHR is lower 1/5 than the total precipitation of the rainy season. There appears maximum hourly rainfall of 84.2 mm/h over the inactive areas of STHR events. STHR events experience obviously inter-decadal variation, It founds that the frequencies of STHR obviously increase and move from northeast to southwest after 2010s. STHR events frequently occur in late July and have diurnal variations. the most active diurnal peak is 17:00. The EOF analysis results indicate that STHR events consistent over the whole Hulun Buir and has opposite phases in the south and the north areas.关键词
短时强降水阈值/强降水事件/强降水雨强Key words
threshold value of short time heavy rainfall/short time heavy rainfall events/rain intensity of heavy rainfall分类
天文与地球科学引用本文复制引用
常煜..呼伦贝尔市汛期短时强降水特征[J].沙漠与绿洲气象,2015,(2):24-30,7.基金项目
中国气象局预报员专项（CMAYBY2014-009）；内蒙古山洪地质灾害防治气象保障工程预报预警业务子项目建设“强对流天气历史个例库建设研究”；内蒙古气象局专家型预报员暴雨团队共同资助。 （）
