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Seasonal variations in tidal harmonic constants are found to be significant in shelf seas and can be represented by adding a series of astrometeorological constituents (AMC) to the astronomical constituents (AC). The relation of AMC and corresponding AC to their resultant constituents (RC) is examined and the seasonal variation of RC is described by modulation ellipses. The values of AMC in the Bohai Sea are calculated and the major features of AMC in the Bohai Sea are analyzed. The dynamic factors which cause AMC are examined by means of numerical experiments.
Seasonal variations in tidal harmonic constants are found to be significant in shelf seas and can be represented by adding a series of astrometeorological constituents (AMC) to the astronomical constituents (AC). The relation of AMC and corresponding AC to their resultant constituents (RC) is examined and the seasonal variation of RC is described by modulation ellipses. The dynamic of which AMC in the Bohai Sea are calculated and the major features of AMC in the Bohai Sea are analyzed. .