2010-2020年舟曲短时强降水时空特征分析

Analysis on Temporal and Spatial Characteristics of Short-term Heavy Precipitation in Zhouqu from 2010 to 2020

对舟曲地区2010—2020年舟曲国家气象观测站及辖区内48个区域自动气象站短时强降水观测资料进行时空分析,发现该地区4—9月短时强降水出现频次呈明显的先增加后迅速减少的特征,以8月出现次数最多,其次为7月,出现次数较少的是4月、9月;6月上旬短时强降水出现次数开始逐渐增多,7月下旬—8月上旬达到峰值,8月上旬之后开始逐渐下降,9月中旬之后无短时强降水出现。

Based on the temporal and spatial analysis of the short-term heavy precipitation observation data of Zhouqu National Meteorological Observatory and 48 regional automatic meteorological stations in Zhouqu area from 2010 to 2020,it is found that the frequency of short-term heavy precipitation from April to September in this area increases first and then decreases rapidly,with the highest frequency in August,followed by July,and the lowest frequency in April and September.In the first ten days of June,the occurrence frequency of short-term heavy precipitation began to increase gradually,reached the peak between the last ten days of July and the first ten days of August,began to decline gradually after the first ten days of August,and there was no short-term heavy precipitation after the middle of September.