What are the main causes of marine tidal floods?

The gravitational force of the interaction between the earth, the moon and the sun, in the process of the movement of the earth and the moon, the three positions are different, and the gravitational force is different. Three of them are in a line with the Moon in the middle, and the gravitational pull is the greatest, and there is a high tide.

The main reason is the gravitational pull of the sun and the earth.

The phenomenon of sea water fluctuations is caused by the gravitational forces generated by the Moon and the Earth. Because the earth and the moon are constantly moving, the relative positions of the earth, the moon and the sun are changing periodically, so the gravitational force is also changing periodically, which makes the tidal phenomenon occur periodically.

Since the summer calendar is based on the change of the moon phase, it has a major function of reflecting the tides, and the tidal phenomenon is dominated by the moon, and the summer calendar based on the change of the moon phase is a guide to maritime activities in ancient times.

The Moon is attractive to the Earth's seawater, and the points on the Earth's surface are different from the Moon, and the place facing the Moon is gravitationally strong, and the seawater expands outward; The place with the back to the moon is less gravitational, and the centrifugal force becomes larger, and the sea water expands to the place with the back to the moon under the action of centrifugal force, and the tide will also occur.

The phenomenon of sea water fluctuations is caused by what and what produces the induction tides: A, the phenomenon of sea water fluctuations is caused by the mutual gravitational pull of the moon and the earth. This is the tidal phenomenon. On the fifteenth day of the lunar calendar, since the moon, the earth, and the sun are in the same straight line, gravity has the greatest effect on the seawater.

The rise and fall of sea water is caused by the gravitational force generated by the moon and the earth, because the earth and the moon are constantly moving, the relative position of the earth and the sun is changing periodically, so the gravitational force is also changing periodically, which makes the tidal phenomenon occur periodically. Under the gravitational pull of the moon and the sun, the tides form a phenomenon of periodic fluctuations in the seawater, which is called tides during the day and tides at night, and is generally called tides. Generally, it fluctuates twice a day, and there is also one.

The tidal difference between the two tides in a day, as well as the high tide and the low tide, is called the daily unequal phenomenon of the tide.

The tidal situation of the ocean is mainly related to the combined force of the moon's gravity and the earth's centrifugal force, the sea water is attracted by the moon, and the distance from the moon at each point on the earth's surface is different, so the gravitational force is different.

It has a certain relationship with the local precipitation, and secondly, it also has a certain relationship with the demeanor, so try to pay attention to the weather at ordinary times, and do not go to the beach in high precipitation or windy weather.

The tides of the ocean are related to the gravitational pull of the moon, the depth of the sea, the air currents, the shape of the ocean basin, and so on.

The main reason for the ebb and flow of sea water is the attraction of the moon to sea water, also known as tidal attraction. The regular high and low tides of the sea are called tidal phenomena.

The Moon and the Earth.

The rise and fall of sea water is caused by the gravitational force generated by the Moon and the Earth. Since the earth and the moon are constantly moving, the relative positions of the earth, the moon and the sun are changing periodically, so the gravitational force is also changing periodically, which makes the tidal phenomenon.

Occurs periodically.

The Moon is attractive to the Earth's seawater, and the distance between the points on the Earth's surface and the Moon is different, and the place facing the Moon is subject to a large gravitational pull and the seawater expands outward, while the place facing away from the Moon has a small gravitational force and centrifugal force.

As it grows, the sea water expands with its back to the moon under the action of centrifugal force, and high tides also occur.

The Moon and the Sun Study the question of a strong country.

Why do the oceans ebb and flow, and how are these tidal phenomena formed?

The main reason for the tides of seawater is the gravitational pull of the moon. Tides, a natural phenomenon that occurs in coastal areas, refer to the periodic movement of seawater under the gravitational force of celestial bodies (mainly the moon and the sun). It is customary to refer to the vertical rise and fall of the sea surface as tides, and the flow of sea water in the horizontal direction as tidal currents.

Due to the action of the tidal force of the sun and the moon, the periodic movements and changes in the earth's lithosphere, hydrosphere and atmosphere are collectively called tides. As a complete tidal science, the research object should take the earth tide, ocean tide and air tide as a unified whole, but because the phenomenon of ocean tide is very obvious and closely related to people's life, economic activities, transportation, etc., it is customary to understand the word tide in a narrow sense as ocean tide. The elastic-plastic deformation of the solid earth caused by the gravitational force of the sun and the moon is called the solid tide, referred to as the solid tide or ground tide.

Tides vary from place to place, and different regions often have different tidal systems, all of which derive their energy from deep-sea tide waves, but have their own unique characteristics.

The periodic rise, fall, advance and retreat of the sea surface caused by the gravitational force of the sun and the moon are called ocean tides, referred to as ocean tides.

The phenomena caused by the high tide of the sea are as follows:

The high tide and low tide of the sea are caused by the gravitational pull of the sun and the moon, the main of which is the moon. The combined force of the moon's gravitational and centrifugal forces is the main cause of the rise and fall of sea water.

The tidal phenomenon refers to the periodic movement of seawater under the action of the gravitational force of celestial bodies (mainly the moon and the sun), mainly the phenomenon of rising tide in the morning due to the tidal force of the sun and the tidal force of the moon in the evening.

High tide

High tides are a natural phenomenon. The sea water has the phenomenon of high tide and low tide, when the tide is high, the sea water **, the waves are rolling, and the scenery is very spectacular; At low tide, the water quietly recedes, revealing a beach. Rising and low tides generally occur twice a day.

The rise and fall of the sea water occurs during the day and is called the tide at night, so it is also called the tide. It is said in an ancient Chinese book that "the water of the sea is the tide in the morning and the tide in the evening". There is a period of time between high tide and low tide when the water level does not rise or fall, which is called flat tide.

Rising tide analysis

Tides are the periodic rise and fall of sea water. Because the day is the morning and the night is the night, the rise and fall of the sea during the day is called "tide", and the rise and fall of the sea water that occurs at night is called "tide".

This phenomenon once made the ancients wonder what caused it. Later, careful people discovered that the tides were delayed for a while every mountain day, and this time was the same as the time when the moon was late every day, so it was thought that the tides and the moon were necessarily related.

The relationship between tides and the moon has been mentioned in the ancient Chinese geographical work "The Classic of Mountains and Seas", and Wang Chong in the Eastern Han Dynasty clearly pointed out in his book "On Balance": "The rise of the waves also rises and falls with the moon". But it wasn't until Newton discovered the law of gravitation that Laplace mathematically proved that tidal phenomena were indeed caused by the gravitational pull of the sun and the moon, primarily the moon.

1. The sea water has a high tide every day, which is mainly a periodic movement generated by the gravitational force of the moon and the sun.

2. The gravitational force of the moon and the centrifugal force of the earth are two opposing forces, and the resultant force (vector sum) produced by the combination of the two is the force of the moon to cause tidal phenomena in seawater, which is called "lunar gravitational force".

3. The tide is weighed during the day and the tide is weighed at night, which is generally called "tide". Generally, it rises and falls twice a day, and there are also fluctuations once. The tidal waves of the open sea are traced up the river, and the tide occurs in the lower reaches of the river.

4. Whenever the first day of the lunar calendar (Shuo) or the fifteenth day (Wang), the position of the earth, the moon and the sun is almost in the same straight line, and the gravitational force of the moon and the sun is the same.

5. But at the beginning of the lunar calendar.

Seven, eight (top winding) or.

Two. Ten. On the second and third (lower chord), the gravitational force of the Moon on the Earth and the gravitational force of the Sun on the Earth are perpendicular to each other, and the gravitational force of the Sun weakens the gravitational force of the Moon, so that there is a small tide in the seawater. In fact, celery tides tend to occur after synodics.

In the second and third days, most of the small tides appear after the upper and lower chords.

2. The reason for this is that the seawater is affected by its own viscosity and seabed topography in the process of flow.