黄土高原区降雨与海洋表面温度的相关分析研究

Characterizing Rainfall Time Series in the Loess Plateau and Periodical Links with Sea Surface Temperature

研究了黄土高原区降雨时间序列和海洋表面温度的关系。采用谱分析法研究了降雨时间序列的频率特性,根据赤池信息系数确定了最优频率组合,并利用Fourer级数进行了降雨时间序列重构。降雨与海洋表面温度的相关分析表明,太平洋地区(东经150°,北纬15°)的海洋表面温度能够较好的预测黄土高原区3个月后的降雨。

In this study, periodical fluctuation and links with sea surface temperature （SST） of rainfall time series in the Loess Plateau of China are discussed. The frequencies of the rainfall time series were obtained by spectral analysis and applied for Fourier series to the original time series. The Akaike information criterion （AIC） was used to optimize combinations of the frequencies. Correlation of the inter annual rainfall time series in June, July and August with SST over the Pacific Ocean （east longitude 150°, North latitude15°）in the previous months indicted significant links.