基于小波分析的信阳市降水变化趋势分析

Analysis of Precipitation Trend in Xinyang Based on Wavelet Analysis

本文利用小波分析、Morlet复小波函数对1960-2015年信阳市降水量序列进行分析。结果表明：年降水量2016年以后一段时间内呈偏少趋势，春季降水将呈略偏多趋势，夏秋冬三季的降水将均呈偏少趋势；信阳年降水量主要受10～16年和4～8年时间尺度的影响，具有5年和8年、16年的时间尺度周期；春李降水量具有6年和14年的时间尺度周期；夏季降水量具有5、8、11年和16年的时间尺度周期；秋李降水量具有6、11年和16年的主周期；冬季降水量具有5、9年和15年的主周期。

This paper used wavelet analysis and Morlet complex wavelet function to analyze the precipitation series of Xinyang in the past 1960-2015 years. The results showed that the annual precipitation was less trend in the period of 2016, and the precipitation in spring would be slightly more trend in spring, and the precipitation in the three quar- ter of summer, winter and winter would be less trend. The annual precipitation in Xinyang was mainly influenced by 10-16 years and 4-8 year scale, with a period of 5 years and 8 years and 16 years, and the precipitation in spring was 6 years. The time scale period of 14 years and the precipitation in summer had 5, 8, 11 and 16 years, and the au- tumn precipitation had the main cycle of 6, 11 and 16 years, and the winter precipitation had the main cycle of 5, 9 and 15 years.