秦岭北麓日降水变化特征分析

Analysis of Daily Precipitation Variation Characteristics in the North Foot of Qinling Mountains

摘要: 为了解秦岭北麓降水演变规律，本文利用单位自建气象站2020年逐时降水数据，从降水量和降水频次两个维度出发，对宝鸡市眉县汤峪镇日降水变化特征进行相关统计分析。结果表明：日降水量在6~8月变化较大，6、7月均已单峰形式呈现，8月以双峰形式呈现，降水量主要集中在6:00~21:00；年降水总量为862.7 mm，5~10月降水量占全年90.87%，其中8月降水量最大，为197.6 mm；6~8月和10月降水频次较高，最高达150次；白天和夜间降水量春秋两季差异不明显，夏冬两季均以白天降水为主，夏春秋三季降水频次基本相等。

Abstract: In order to understand the evolution law of precipitation in the north foot of Qinling Mountains, this paper makes a relevant statistical analysis on the variation characteristics of daily precipitation in Tangyu Town, Mei County, Baoji City by using the hourly precipitation data of the meteorological station built by the unit in 2020 from the two dimensions of precipitation and precipitation frequency. The results show that the daily precipitation changes greatly from June to August, presents in the form of a single peak in June and July, presents in the form of double peak in August, and the precipitation is mainly concentrated in 6:00~21:00. The total annual precipitation is 862.7 mm, and the precipitation from May to October accounts for 90.87% of the whole year, of which the precipitation in August is the largest, 197.6 mm. The precipitation frequency from June to August and October is high, up to 150 times. The difference between daytime and nighttime precipitation in spring and autumn is not obvious. Daytime precipitation is the main precipitation in summer and winter, and the precipitation frequency in summer, spring and autumn is basically the same.