Time-variation of inter-decade periodic components of the Earth's rotation rate
Han Yan · Ziran zaihai xuebao · 2003
Based on the yearly average data of the length of the day, the parameters of interdecade periodic components of the Earth's rotation rate during 1800～2002 were calculated, and the variations of the main periodic components with the lapse of time were analyzed by the wavelet transform. It is found that the periodic components possess the character of variation with time. The authors think that more attention should be paid to the character when the relationship between some geophysical phenomena, natural disasters and the Earth's rotation variation are studied.