Period components in the monthly mean sea level variations in the Pacific Ocean

To study the period components in the monthly mean sea level variations in the Pacific Ocean, this paper analyses the monthly mean series of 236 tide gauge stations in the Pacific on the basin of the improved analytical method of the monthly mean sea level period signals. The results show that the oscillation periods of the sea level series are not fixed, but vary with stations. This paper also dmcusses the existences oI the quart-2 years atmospheric oscillation period, the 3-7 a period related to the El Nino events, sunspots, double sunspots and the 25-30 a overlength oscillation periods.