The amplitudes and phases of diurnal and semidiurnal tides show some quasi-periodic characteristics which may be resulted from nonlinear interaction between tides and planetary waves.

• 周日潮汐和半日潮汐的振幅和相位随时间呈现出拟周期变化的特征；这可能是潮汐与行星波非线形相互作用的结果.