连续小波变换在上海近100年降水分析中的应用

An Application of Continuous Wavelet Transforms to Precipitation Analysis in Shanghai during One Hundred Years

利用上海地区 190 0～ 1999年月降水资料 ,用 Marr波及 Morlet小波变换方法分析了上海地区 10 0年来冬、夏季降水时间 -频率的多层次时间尺度演变特征及其突变特征。结果表明 ,其年际及年代际时间尺度的周期变化在时间域中分布很不均匀 ,具有很强的局部化特征。

Using Marr wavelet and Morlet wavelet transforms,the variations of winter and summer precipitation in Shanghai during one hundred years were analysed.Some multi time scale and jump features of the variations were discoverd.These features are very important in short range climate forecast for Shanghai.The multi time scale pattern and the background of Shanghai winter and summer precipitation were given.