齐齐哈尔市气温变化小波分析

利用1909年1月至2002年12月逐月平均气温距平资料和Morlet小波变换方法，对齐齐哈尔市气温变化的年际、年代际周期以及突变特征进行了分析。得出近百年来齐齐哈尔市气温变化具有准2、4、4～6、8年左右的年际尺度和40～60年的年代际尺度周期变化，并存在突变特征，齐齐哈尔市气温变化是不同尺度周期振荡综合作用的结果。所得结论对齐齐哈尔市的短期气候预测具有一定的参考意义。

Wavelet Analysis of Temperature Variations in Qiqihar

The inter-annual and inter-decadal periodic change and abrupt change characteristics of Qiqihar's temperature variation were analyzed by means of the Morlet wavelet transforming method and the month-to-month mean temperature anomaly data from 1991 to 2002, and the main regularities of temperature variation were discussed. It is found that there were inter-annual periodic variations of quasi-biennial, 4 to 6 years, and 8 years, and inter-decadal periodic variations of 40 to 60 years, as well as abrupt changes, in Qiqihar in recent 100 years; the temperature variation in Qiqihar was the composite result of multi-scale periodic fluctuations. The conclusions can be used as references in short-term climate forecasting in Qiqihar.