摘要
根据1951～2007年华东地区逐月平均气温和降水资料，在利用连续小波变换对华东地区的降水、气温与副高指数的时频变化特征进行分析的基础上，采用交叉小波变换方法分析了华东地区近57年的气候变化与副高之间的相关关系。结果表明，华东地区气候要素与副高指数距平序列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。其中以2～8年尺度的年际振荡较为明显，10年以上的年代际变化以1980年为突变点。
Based on the monthly mean temperature and precipitation data of East China in the last 57 years, time - frequency analyses on precipitation, temperature and subtropical high indices were applied by Morlet wavelet. Some inter - annual and inter- deeadal variations with trend characteristics are found. In this case, Morlet wavelet transform was first used to analyze each time series, and then the bivariate wavelet analysis to investigate the correlation between climate change and subtropical high indices. Results show that climate elements in East China and subtropical high indices exhibit significant correlation on time scale of 2 -8 years, but take 1980 as point of discontinuity on a longer time scale of above 10a.
出处
《广东气象》
2008年第6期17-19,共3页
Guangdong Meteorology
