本文利用长春市近55年(1949年~2003年)的气温资料,通过MATLAB软件,实现了对长春气温变化距平序列的多项式拟合、趋势回归分析和Marr小波分析等气候学上的数值统计诊断分析,总结了长春市近55年平均气温的时间一频率的多层次时间尺度变化特征,并发现长春市年平均气温变化以18a周期振动最强.
Using MATLAB and Marr wavelet method, the temporal-frequency features of the air tempearture of the past 55 years in Changchun were analysed. The tions of temperature in Changchun contain obvious staggered features. Eighteen-year temperature variations is the strongest. multi-time scale variations results show that the varia- period-oscillation of meantemperature variations is the strongest.