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《Chinese Journal of Atmospheric Sciences》 2004-01
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Orthogonal Wavelet Analysis of the Variations of the Recent 100-years Precipitation in China

Yan Huasheng 1), Wan Yunxia 1), Deng Ziwang 2), and Cao Jie 1)1) (Department of Atmospheric Science, Yunnan University, Kunming 650091) 2) (Nanjing Institute of Meteorology, Nanjing 210044)  
Aiming for the questions about the choice of the wavelet mother function and their respective features, a comparison of orthogonal wavelet and non-orthogonal wavelet is studied by means of theory analysis, method comparison and example calculation. 17 stations about 100-years (1901-2000) annual time series of precipitation in China are analyzed by means of orthogonal wavelet transform. The results show that the signals on different time-scales are orthogonal when DB16 wavelet is used to multi-time-scale analysis. It also shows precipitation changes in China are various on different time scales. The most significant variation of precipitation in China has the periodic variations of 3.5 year,3.5~7 year,7~14 year.
【Fund】: 国家重点基础研究发展规划项目G1 9980 40 90 5;; 中国科学院知识创新项目KZCX2 2 0 3;; 国家自然科学基金资助项目 40 0 65 0 0 1资助
【CateGory Index】: P468
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