Trend analysis of relative sea level rise or fall of the tide gauge stations in the Pacific

On the basis of the analytical results of the period components of monthly mean sea level of 236 stations in the Pacific, the period components plus linear trend are used to fit the monthly mean sea level series.The statistical results of linear trend croefficients of these stations indicate that, if the abnormal values of sea-level rise and fall are neglected, the average rise rate of relative sea level in the Pacific is 1.16 mm/a.Affected by nonuniformity of land subsidente and other factors, the regional change of relative sea level rise or faV in the Pacific is greater.In the light of the positive or negative values of linear trend coefficients as well es the geographical position of the sea area, zoning is made of the sea level rise or faV in the Pacific including the coastal areas of China and Southeast Asia to obtain the average rate of rise or fall in each sea area.The rise or fall trends of relative sea level obtained for the entire Pacific Ocean, west coast of North America, the northern and central South America, the greater part of the tropical Pacific and the croastal Islands of Japan are basically in keeping with the other relevant results.The regional average estimated result of the relative sea level in the coast of East Asia is on the rise while the estimated results provided by Barnett tend to drop;the main cause of this nonuniformity is the number of stations selected and the distributional density.