摘要
在利用Morlet小波对时间序列进行连续小波变换的基础上,采用交叉小波变换方法,分析了河南省近50年降水与北极涛动指数(AOI)之间的关系。结果表明,河南降水距平(ΔR)以及北极涛动指数距平(ΔIAO)序列中都存在着不同时间尺度的周期分量,并且各周期分量的强度是不同的。同时研究了ΔR与△I之间在35年、16年、8年等各周期尺度的相关振荡及相应尺度上的时频特征。
Based on the continual wavelet transformation of the time series by using the Morlet wavelet,using the overlapping wavelet transform method,the relationship between the precipitation in Henan Province in recent 50 years and North Pole wave motion index（AOI）was analyzed.The results indicated that the precipitation anomalous（ΔR）in Henan as well as the North Pole wave motion index anomalous（△IAO）in the sequence had different time criterion of the periodic component.And various periodic component＇s intensity was different.The related vibration of various cyclical criterion and the frequency characteristic of the corresponding scale between ΔR and △IAO in 35 years,16 years,8 years and so on were also studied.
出处
《安徽农业科学》
CAS
北大核心
2010年第12期6325-6328,共4页
Journal of Anhui Agricultural Sciences
关键词
北极涛动指数
河南降水
小波变换
North Pole wave motion index
Henan precipitation
Wavelet transformation
