摘要
应用一维Morlet小波变换分析方法对新余市降水的多时间尺度进行分析,发现新余市降水除在整个时域中有明显的3—5a的周期变化外,其他尺度周期信号的强弱在时-频域中的分布具有很强的局部特征。但无论是较大时间尺度,还是较小时间尺度,新余市年降水、汛期降水均处于偏少期,且近期偏少趋势仍较明显;伏秋季降水则处于偏少末期,有向偏多转化的趋势。
The one-dimensional Morlet wavelet transform method is applied to analyze the multiple time scale features of precipitation in Xinyu city. The results show that besides the 3--5 year periodic variation, other time scale signals present noticeable local features. For any time scales, the annual and flood season precipitations of Xinyu city are always in the less period, and this trend is still evident. The autumn precipitation is in the late less period and is probably changing into the more period.
出处
《气象与减灾研究》
2009年第3期63-66,共4页
Meteorology and Disaster Reduction Research
