Authors: Juan Zhao Yanben Han
Publish Date: 2008/08/26
Volume: 165, Issue: 7, Pages: 1435-1443
Abstract
We analyzed the relationship between the earth’s rotational variation and seasurface temperature anomaly By means of using Fast Fourier Transform FFT bandpass filter on the change of lengthofday ΔLOD data the interannual variation series having time periods greater than 15year and less than 8year was obtained Time series analyses of the interannual variation which corresponds to the El Niño period reveal a close linkage between the earth’s rotation and El Niño A detailed comparison suggests that six of seven El Niño events are nearly synchronous with the interannual variation of the earth’s rotation and all ΔLOD peak are in El Niño years except 1991–92 which means the interannual variation of the earth’s rotation in these years is relatively slow The correlation between ΔLOD and seasurface temperature is about 0517 1 monthlag which far exceeds the 99 significance level
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