On the Sea Level Variability and Storm Surge Frequency from the Data of Tide-Gage Stations in the Northwestern Pacific

T. V. Belonenko and V. V. Koldunov

The sea level variability in the Northwestern Pacific based on the observations at tide-gage stations of JASL system is considered. The long-term seasonal variations of the sea level at these stations are presented and the climatic trends, variability range, and standard deviations of monthly mean values of the sea level from the long-term seasonal values are computed. The frequency of the sea level exceeding relative to the moving average with the shift of 30 days is computed. It is shown that, contrary to general opinion, the frequency of the sea level exceeding relative to the moving average in the Northwestern Pacific does not increase on the whole under conditions of the climate warming and sea level rise.