Journal of Ecology and Rural Environment ›› 2007, Vol. 23 ›› Issue (4): 29-32.doi:
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MIAO Chi-Yuan, WANG Ya-Feng, ZHENG Yuan-Zhi
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Abstract: Based on 48 years of summer rainfall data,Morlet wavelet analysis was done of the sequence of summer rainfall in Nenjiang and Harbin,on a multi-time scale.Results show that in recent years,the summer rainfall in Harbin displayed the most apparent cyclical variation on a 29-38-year scale,the largest modulus,and the strongest energy;and the summer rainfall in Nenjiang did an obvious cyclical variation on a 19-30-year scale,and its energy value is quite large.Both the two cyclical variations showed a trend of being stronger in energy with the time.Presently,both the summer rainfalls in Nenjiang and Harbin are in a long cyclical period of low-water.It is predicted that in a relatively long period the summer rainfall will be lower than the average of the past 48 years.
Key words: Nenjiang, Harbin, rainfall, wavelet analysis, Morlet
CLC Number:
P426.62
MIAO Chi-Yuan, WANG Ya-Feng, ZHENG Yuan-Zhi. Wavelet-Based Analysis of Characteristics of Summer Rainfall in Nenjiang and Harbin[J]. Journal of Ecology and Rural Environment, 2007, 23(4): 29-32.
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