DIGITAL FILTERING OF THE SEA-LEVEL DATA NEAR THE MOUTH OF THE CHANGJIANG (YANGTZE) RIVER
长江口地区海平面资料的数字滤波

We present in this paper the digital filtering of sea-level data, and the results obtained thereupon. By using monthly mean data to filter and eliminate the regular annual change, the influence of the periodic factors on sea-level data has been apparently eliminated.