TIDAL CONSTITUENTS IN THE BOHAI AND YELLOW SEAS FROM AN ADJOINT NUMERICAL MODEL WITH TOPEX／POSEIDON DATA

Eleven tidal constituents K1 , O1 , P1 , Q1 , M2, S2, N2, K2, M4, MS4 and M6 , which are extracted from 10 years TOPEX/Poseidon altimetry data along track points in the Bohai and Yellow Seas, are assimilated synchronously into a two-dimension nonlinear tidal model with adjoint method. And the bias between calculations and observations are provided. The deviations of M2 are 7.1 × 10^-2 m inamplitude and 4.7° in phase-lag. Those of O1 are 2.8 × 10^-2 m and 5.4° accordingly. Compared with other models, our discrepancy is less. It is shown that the precision of the model is more accurate. The co-tidal charts of the eleven constituents are also drawn. The general patterns are in good agreement with those literatures cited.