< p >潮汐的动力学是相当复杂的。主要的思想是,从月球引力和太阳影响地球上的水(以及其他所有)。问题是有几个动作,改变之间的距离3系统和运动所涉及的不同频率之间的相互作用造成的。< a href = " https://en.wikipedia.org/wiki/Theory_of_tides " rel = " nofollow noreferrer " >平衡理论潮汐< / >分离组分的不同的效果为一组进行谐波分析。相关的时间是:< / p > < ul > <李>月球天(月球自转的周期),24.84平太阳小时。李李< / > < > < a href = " https://en.wikipedia.org/wiki/Orbit_of_the_Moon " rel = " nofollow noreferrer " > < / >恒星月(段月球赤纬),27.32平太阳天。李李< / > < > < a href = " https://en.wikipedia.org/wiki/Tropical_year " rel = " nofollow noreferrer " > < / >热带年(期< a href = " https://en.wikipedia.org/wiki/Position_of_the_Sun # Declination_of_the_Sun_as_seen_from_Earth”rel = " nofollow noreferrer " >太阳赤纬< / >),365.24平太阳天。李李< / > < >的月球近地点,8.85年(1年= 365.2421988天)。李李< / > < >的< a href = " https://en.wikipedia.org/wiki/Lunar_node " rel = " nofollow noreferrer " > < / >月球节点,18.61年。李李< / > < >太阳近日点的时期,20940年。< /李> < / ul > < p >的解释每一个成分都可以相当复杂(< a href = " //www.hoelymoley.com/questions/8407/definitions-of-tidal-harmonic-constituents " >在其他一些例子回答< / >)。每天不同的振幅和< a href = " https://en.wikipedia.org/wiki/Tide # Range_variation: _springs_and_neaps rel = " nofollow noreferrer " > spring-neap周期< / >相关主要月球和太阳的组合效果。 The differences in high/low tide from month to month are related to the next two main frequencies of oscillation. Mainly, the variations in Earth-Sun distance associated occurring in a period of tropical year. The lunar distance also contributes to these differences, but its cycle is much longer (~9 years). Also, the spring-neap cycle (with a frequency of half a lunar month ~13.5 days) will occur at different times of the month and can lead to differences in tidal amplitude if you compare the tides measured the same day of consecutive months. 
(Source www.niwa.co.nz)