宿州市1970~2023年降雨量变化特征分析
Analysis of the Characteristics of Rainfall Variation in Suzhou City from 1970 to 2023

为研究宿州市多年降雨特征，根据宿州市1970~2023年的日降雨资料，采用累积距平、M-K突变分析法和Morlet小波分析法对宿州市四季降雨量进行突变和周期性分析。结果表明，宿州市年内降雨量分配不均，主要集中在夏秋两季，不同季节降雨量分别占全年降雨量的13.9% (春)、47.4% (夏)、30.8% (秋)、7.9% (冬)；春季降雨没有明显突变年份，夏季降雨的突变点为2008年，秋季降雨显著突变时间区域为1985~1987年，冬季降雨的突变点为2001年。年降雨存在2a左右的主周期振荡规律，整体降雨周期性变化不明显。
In order to study the characteristics of precipitation in Suzhou, based on the daily precipitation data of Suzhou city from 1970 to 2023, by using the method of cumulative departure, the M-K mutation test method, and Morlet wavelet analysis, the seasonal precipitation in Suzhou city is analyzed mutation and periodicity. The results show that the precipitation distribution throughout the year is highly uneven. It is mainly concentrated in summer and autumn. The precipitation in different seasons accounts for the annual precipitation of 13.9% (spring), 47.4% (summer), 30.8% (autumn) and 7.9% (winter). There is no obvious precipitation mutation in spring. The summer precipitation mutation point is 2008, the autumn precipitation mutation time is from 1985 to 1987, and the winter precipitation mutation point is 2001. The average annual precipitation has a main period oscillation period of 2 years. The periodicity of the whole precipitation is not obvious.