【摘要】 采用连续小波变换和交叉小波变换方法,分析了NINO3区(150-90°W、5°N-5°S)海表温度(简称SST)和河南省最高、最低气温的多时间尺度特征,讨论了河南省最高、最低气温与NINO3区SST的时频域相关关系。结果表明,NINO3区SST和河南省月平均最高、最低气温序列都存在着不同时间尺度的周期变化,并且各周期分量的强度不同,时域中的分布存在阶段性特征。NINO3区SST影响河南省最高、最低气温变化的时频结构,尤其是对最低气温的影响更为明显。更多还原

【Abstract】 The time-frequency structures of monthly sea surface temperature anomaly(SSTA) series in NINO3 region and monthly mean maximum and minimum temperature anomaly series in Henan province during the last 55 years are analyzed using the wavelet transform and cross wavelet analysis techniques.The correlations in time and frequency space are studied also between the sea surface temperature(SST) of NINO3 region and monthly mean maximum and minimum temperature in Henan province.The results show that there are multi-time scale periods in the variations of SST of NINO3 region and monthly mean maximum and minimum temperature in Henan province,which have various intensities in frequency space and localizing characteristics in the time space.The variations of SST of NINO3 region influence the time-frequency structures of monthly mean maximum and minimum temperature in Henan province,especially on the minimum temperature.更多还原