How does the wind in nature come about, and what makes it move?

To give a simple example: before the balloon is blown up, the air pressure inside the balloon is equal to the air pressure outside the balloon is equal to the atmospheric pressure. When you blow into a balloon, the air pressure inside the balloon is greater than the outside atmospheric pressure, creating a high pressure zone relative to the surrounding area.

When you don't release the balloon, you can feel the wind. This proves that the wind flows from the high pressure area to the low pressure area. It is the movement of the air.

Meteorologically defined as: The level of luck in the air.

If you don't understand it yet, you can use an analogy to going into the water. Water also flows from high pressure to low pressure.

In layman's terms, in real life. The air in the place with high temperature rises by heating, and the air in the place with low temperature sinks when it is cold, and the cold air comes up horizontally to supplement the rise of hot air.

The molecule is one in motion.

Regardless of solids, liquids, gases.

tightly bonded.

Two different pieces of metal.

After many years, they will infiltrate each other.

Molecular movement. of the fast.

Depends on his inner energy.

The greater the energy in the temperature.

The more vigorous he exercised.

The farther the average relative distance between molecules.

Surface air temperature differences.

This makes the air dense in some places.

In some places, the air density is low.

It's like hot air.

It is loose cotton.

The cold air is compact wood.

Due to the fluidity of air.

So there is buoyancy.

The light hot ones go up and the heavy ones go up.

The cold one will be. Fill it in from the ground.

This air flow.

The wind was formed.

1. The leaves of some plants have changed from green to yellow or red, which is related to the pigments contained in the leaves;

2. The air becomes dry and windy, and small animals begin to prepare for wintering, and migratory animals begin to move;

3. The direct sunlight moves southward (for the northern hemisphere), so the days are getting shorter;

4. The climate becomes colder, the cold air goes south, and the temperature alternates frequently between cold and hot.

The specific causes of the formation of the wind:

Wind has no shape, it is a natural phenomenon caused by the movement of air. Sunlight shines on the surface of the earth, causing the surface temperature to rise, and the air on the surface is heated and expands lightly and rises, forming a certain cavity.

Due to the effect of atmospheric pressure, after the hot air rises, the cold air at low temperature flows horizontally, and the rising air falls due to the gradual cooling and heavier, and the air will be heated to rise due to the high surface temperature, so that the air will continue to circulate, and the air will continue to flow, forming wind.

Measuring instruments and methods for wind scales:

1. Lightweight anemometer.

A device commonly used in the field to measure the magnitude of the wind, consisting of an induction part and a counter.

The portable anemometer is generally placed in an open place with no tall obstacles around it, and the watch body is vertical. Turn off the switch before observation and write down the number of the pointer. After waiting for a minute or two, turn on the switch and turn on the stopwatch at the same time to record the time.

At this point, the observer quickly leaves the anemometer and stands downwind of the instrument.

Nearly 100 seconds after the instrument was activated, the observer quickly approached the instrument, turned off the switch at plus 100 seconds, and noted the second pointer indication. The difference is calculated from the two readings, which indicates the number of scales taken by the anemometer hand during the observation time, and is recorded in the record sheet.

2. Wind speed and wind vane.

Some lightweight anemometers, in addition to the structural performance of the anemometer mentioned above, are also equipped with a wind vane on the shaft to indicate the wind direction, called a wind speed and wind vane.

Summary. Wind is a natural phenomenon on Earth, and it is caused by the heat of solar radiation. Sunlight shines on the earth's surface, causing the surface temperature to rise, and the air on the surface of the earth is heated and expands lightly and rises.

When the hot air rises, the cold air at a low temperature flows in laterally, and the rising air cools and becomes heavier and falls, and the air heats up to rise due to the high surface temperature, and the flow of this air generates wind. From a scientific point of view, wind often refers to the horizontal movement component of air, including direction and magnitude, i.e., wind direction and speed; But for flight, it also includes the vertical motion component, the so-called vertical or ascending airflow. Gale moves objects in relation to the direction of the object (mass of matter).

The speed of the wind is fast.

Wind is a natural phenomenon on Earth, and it is caused by the heat of solar radiation. The sunlight shines on the earth's surface, causing the surface temperature to rise, and the air on the surface is heated and expands lightly and rises. When the hot air rises, the cold air at a low temperature flows in laterally, and the rising air falls as it cools and becomes heavier, and the air is heated to rise due to the high surface temperature, which is like the flow of hungry air to produce wind.

From a scientific point of view, wind often refers to the horizontal movement component of air, including direction and magnitude, i.e., wind direction and speed; But for flight, it also includes the vertical motion component, the so-called vertical or ascending airflow. Gale moves objects in relation to the direction of the object (mass of matter). The speed of the wind is fast.

Dividing method: Wind speed refers to the horizontal distance of air flowing per unit of time. According to the phenomenon caused by the wind on the ground objects, the magnitude of the wind is divided into 13 levels, which are called wind levels, referred to as wind levels.

And the phrase "Dongfeng 3" that people usually hear in the weather forecast refers to "Beaufort Scale". "Beaufort Scale" is the British acre of people (Francis Beaufort) in 1805 according to the degree of wind on the ground (or sea) objects to determine the wind force of the pre-state level, a total of 0 17 grades.

When there is high and low pressure in the two places, the gas flows horizontally from the high pressure area to the bottom pressure area and generates wind. Punmin.

Under normal circumstances, the wind does not produce fluctuations (there is sound when it is supersonic speed), and when it encounters an obstruction, such as a tree branch, it will produce a vortex on the leeward side of the branch because of the obstruction, so that it will vibrate and produce sound.

In nature, there are different winds in different regions and seasons, but winds are formed by air flow.

In coastal places, there is a sea breeze during the day and a land breeze at night. This is because the sun shines on the earth, and the temperature on land is higher than on the sea during the day, and the hot air on land is constantly rising, and the cold air on the sea surface is constantly flowing to the land to replenish, and this air flow from the sea to the land forms the sea breeze.