摘要
为研究湖北省强降水特征,利用湖北省2500多个自动站2008-2017年逐小时降水资料,分析976个强降水个例的时空分布特征,重点对局地短时强降水特征加以讨论,结论如下:(1)湖北省强降水具有明显的季节分布特征,夏、春、秋季依次减少;空间分布上,山地平原交界带及东部地区频次较高,鄂西北地区频次较少.(2)局地短时强降水个例(217个)占强降水个例的22%,是湖北强降水的重要表现形式之一,主要表现在区域自动站上(占比高达93.3%),过去由于测站密度不高等原因未对这类强降水给予足够的重视.(3)局地短时强降水时间分布上,7月数量最多,主要出现在午后至傍晚时段,持续时间以1h为主;空间分布呈东西部密集、中部稀疏的格局,其中黄冈、咸宁、宜昌附近发生频次较高.
In order to study severe rainfall characteristics in Hubei Province,based on hourly precipitation data of more than 2500 automated ground observation stations in Hubei Province during 2008-2017,this paper analyses spatial and temporal distribution characteristics of 976 cases of severe rainfall,and focuses on local short-term severe rainfall.The analysis results show that severe rainfall in Hubei Province has significant seasonal distribution characteristics,which are most abundant in summer,next in spring and least in autumn;Spatially,the eastern part of Hubei and the transition zone between mountain and plain are frequently distributed,according to the frequency of stations experiencing severe rainfall,while infrequently in the northwest of Hubei.Secondly,217 cases of local short-term severe rainfall account for.22%of the whole cases,which is one of the imperative representation forms,and mostly contributed by regional stations(up to 93.3%).Local short-term severe rainfall is the main severe rainfall type in Hubei which did not attract enough attention in the past,attributing to the low density of the observation stations.Thirdly,temporal distribution of local short-term severe rainfall shows July is the most abundant month,and this type of severe rainfall frequently occurs during the period from afternoon to evening,prevailingly lasts for one hour.The frequency distribution shows that the easterm and western part of Hubei is densely distributed,while it is sparse in the midland,among which Huanggang,Xianning and Yichang is largely distributed.
作者
雷婧
田刚
李超
LEI Jing;TIAN Gang;LI Chao(Chengdu University of Information Technology,Chengdu 610225,China;Wuhan Central Meteorological Observatory,Wuhan 430074,China)
出处
《成都信息工程大学学报》
2020年第3期341-346,共6页
Journal of Chengdu University of Information Technology
基金
成都市科技局科技项目(2018-YFO5-01264-GX)。
关键词
气象学
强降水
局地短时强降水
逐时降水量
时空分布
meteorology
severe rainfall
local shot-term severe rainfall
hourly precipitation data
spatial-temporal distribution
