我国1月和7月气温变化的分析
THE ANALYSIS OF TEMPERATURE CHANGES IN JANUARY AND JULY IN CHINA
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摘要: 根据我国近90年的气温等级资料,采用小波分析方法,分别讨论了我国不同地区1月和7月的气温变化趋势,结果表明:我国各地区7月的气温变化都呈下降趋势,而1月气温的变化趋势除华南和西南地区呈下降趋势外,其它地区呈上升趋势。然后着重讨论了1月与7月气温变化之间的关系,结果发现:在小波变换的曲线图上,东北、华北、长江、西北和新疆地区1月与7月的两条曲线走势基本呈反位相,而西南和华南地区却几乎同位相。从各地区小波逆变换重构出来的序列曲线看,较大时间尺度(对应于a =32)的气温变化趋势与原序列一致。Abstract: The temperature changes trend in January and July are analyzed, the results show that the temperature changes trend on July descend, and on January ascend except in South China and South-west China. The relation between the temperature in January and July are discussed by using the wavelet. The results show that the trend phase in July and January are nearly in-phase in Southwest and South China, but are out-of-phase in other regions. Reconstruction of original temperature series in each region indicats that their change trend are consistent with original temperature series.
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Key words:
- temperature in January /
- temperature in July /
- Wavelet Analyse
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