The rising tide of seawater every day is mainly caused by the periodic movement caused by the tidal force of the moon and the sun.
The gravitational force of the moon and the centrifugal force of the earth are two opposing forces. The resultant force (vector sum) produced by the combination of the two is the power of the moon to cause tidal phenomena in sea water, which is called the "lunar tidal force".
The mass of the sun is about 27 million times that of the moon, and the average distance from the sun to the earth is about 389 times the average distance from the moon to the earth. Therefore, it can be calculated that the ratio of the sun's tidal force to the moon's tidal force is 1:2.18. Although the tidal phenomenon caused by it is not easy to be observed alone, it affects the size of the lunar tide.
There are many reasons for the rise and fall of the tide... Of course, it is mainly due to gravity... Tide is the rise and fall of the ocean surface on the earth caused by the tidal force of the sun and the moon.
Tides cause changes in the depth of water in oceans and harbors, and form oscillating tidal currents. Therefore, making predictions of tidal currents in coastal areas is very important in navigation. The intertidal zone, which is buried in the seawater during high tide and exposed during low tide, is an important marine ecology caused by tides.
The changing positions of tides are related to the relative positions of the moon, sun and moon, and are coupled to the effects of the earth's rotation and the depth of oceans, large lakes and estuaries. In addition to occurring in the ocean, tidal phenomena also occur in other time and space systems with gravitational fields.
The daily sea level changes, especially those that actually occur in shallow seas and harbors, are not only affected by astronomical tidal forces, but also strongly affected by meteorological (wind and air pressure), such as storm surges.
The rotation of the earth will cause a gravity difference on the earth's surface. This gravity difference will drive the movement of sea water, causing the sea water on the earth to rise and fall. Of course, in addition to the rotation of the earth, the rise and fall of sea water is also affected by other factors.
As the ocean moves with the Earth to the side facing the moon, it causes the water to rise. As the oceans move with the Earth to the side facing away from the moon, the moon pulls the Earth in, pulling the oceans closer, causing water to rise from the far side.
Tides are not only a natural phenomenon, they are also a useful energy source. Using tides to generate electricity has become more and more popular. It is pollution-free and renewable. It only needs to use the reservoir to convert high and low potential energy, which is convenient and fast.