我国持续性重大天气异常成因与预报方法研究回顾与未来展望
翟盘茂, 倪允琪, 陈阳

Mechanism and forecasting method of persistent extreme weather events: review and prospect
Zhai Panmao, Ni Yunqi, Chen Yang
图2 1991年长江流域28#cod#x000b0;～32#cod#x000b0;N,115#cod#x000b0;～122#cod#x000b0;E降水小波分解 a为区域平均降水序列单位:mm；b降水序列的小波能谱,其中基小波采用高斯函数的6阶导数,粗实线代表通过95%信度检验,虚线以外的地区表示头部效应对分解结果影响较大的区域；c为全时段小波谱,虚线代表信度为95%的红噪声能谱
Fig.2 Wavelet analysis of precipitation of Yangtze River 28#cod#x000b0;～32#cod#x000b0;N, 115#cod#x000b0;～122#cod#x000b0;E in 1991 a Displays the regional averaged precipitation unit: mm; b Represents the wavelet power spectrum of precipitation, areas surrounded by bold contours denote that the power exceed 95% confidence level; the dashed lines indicate the region under the edge effects;c Shows the global wavelet spectrum, with dashed line indicating the red noise spectrum at the 95% confidence level