Traditional Culture Encyclopedia - Lucky day inquiry - What is the reason for the high tide and low tide of seawater?

What is the reason for the high tide and low tide of seawater?

The resultant force of lunar gravity and centrifugal force is the tidal force that causes seawater fluctuation.

The driving forces of earth tides, ocean tides and atmospheric tides are all caused by the different gravitational forces of the sun and the moon on various parts of the earth, and they influence each other.

The air tide is above the sea tide, which acts on the sea surface and causes additional vibration, making the change of the sea tide more complicated.

ocean tide

This is a natural phenomenon in coastal areas. In ancient times, it was called "tide" when the river flowed out of the river and sea during the day, and "sunseeker" at night, which were collectively called "tide". Traditionally, the vertical fluctuation of sea surface is called tide, and the horizontal flow of sea water is called tidal current.

Tidal fluctuation law of seawater

There are two orgasms every day, with an interval of 12 hours. The high tide generally lasts for more than an hour before the low tide begins, and the low tide time is at least between the two high tides. The time of high tide is different every day,/kloc-comes back once every five days. Therefore, the climax of the next day is 0.8 hours (48 minutes) later than that of the previous day, and the daily climax time can be calculated according to the lunar calendar date.

basic content

Long-term fluctuation of the ocean caused by tidal force. The long-term fluctuation of seawater under the tidal force of the sun and the moon is characterized by vertical tidal level fluctuation and horizontal tidal advance and retreat. Tides usually occur during the day, while sunsets usually occur at night. Because both the moon and the sun are periodic in the movement of the earth, the most striking feature of tidal phenomenon is its obvious regularity, and its change period is about half a day or a day.

Edited on 20 19-0 1-25.

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