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Wind is the horizontal movement of the atmosphere.
The difference in air pressure on the same horizontal plane creates a horizontal pressure gradient force, under the action of which the atmosphere ceases to be stationary and begins to move horizontally, transforming into wind. In other words, the horizontal pressure gradient force is the driving force that produces the wind and is the direct cause of the formation of the wind.
There are two reasons for the formation of winds, namely the rotation of the earth and the difference in how much the earth's surface is heated by the sun.
The Earth is rotating, which means that a person standing at the Earth's equator moves about 250,000 miles a day. The friction of the Earth's surface against the atmosphere causes the air above the person's head to move as well. However, since the atmosphere is not permanently connected to the ground, its speed of movement is relatively slow, so it appears to people on the ground as if the air is moving.
But due to the presence of the sun, the movement of the wind is more complicated. Where land and sea receive the most solar radiation, the air is warmer and moves upwards and vice versa. The downward air creates a high-pressure area, and the air in the high-pressure area flows to the low-pressure area, so we see the wind.
And that's just the simplest explanation about wind. In fact, the wind we see every day is a very complex phenomenon, and the causes of this are not only the above-mentioned forces, but also the influence of water, mountains, and even buildings and trees.
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Regardless of the difference between the wind, do you know the reason why the wind is formed?
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Wind is generally caused by solar radiant heat. 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 laterally, and the rising air gradually cools and becomes heavier and falls, and the air heats up to rise due to the high surface temperature, and this air flow is called wind.
When the accumulated water vapor (cloud) forms water, the volume shrinks, and the surrounding water vapor comes to replenish it, forming wind. The wind on the earth is related to the water source, and the wind is produced by the expansion and contraction of water and water vapor. The wind blows from the sea to the land, or the land blows to the sea, and in the summer the air and water vapor on the ground are high in temperature, and the air and water vapor that are heavy on the sea surface should supplement the air space on the ground.
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Natural winds are mainly caused by air pressure differences. The difference in air pressure is due to the irradiation of the sun, and the solar radiation causes the earth to heat unevenly, forming high and low air pressure, and the air flows from a place with high air pressure to a place with low air pressure.
Natural winds are mainly caused by air pressure differences. Wind is formed when air flows from a place with high air pressure to a place with low air pressure.
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In general, it can be understood that the movement of hot and cold air forms the wind, and our natural wind is because of the flow of air.
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1. Natural wind is mainly caused by the difference in air pressure. Air flows from a place with high air pressure to a place with low air pressure.
where the wind is formed.
2. Wind is a natural phenomenon caused by the movement of air.
It is caused by the heat of solar radiation. The heat of the sun causes uneven heating. Sunlight.
When irradiated on the earth's surface, the surface temperature rises, and the air on the surface expands lightly and rises due to heating. 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.
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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. At night, the temperature on land drops very quickly, and the temperature on the sea surface drops very slowly, so the temperature on the sea surface is higher than on land, so the cold air on land is supplemented by flowing to the sea surface, and this atmospheric flow forms the land breeze.
In the mountains, there are also valley winds. When the sun comes out during the day, the sunlight shines on the hillside, and the temperature of the air layer close to the hillside rises, and the hot air rises along the hillside, and the cold air rises from the valley to the top of the mountain to replenish it, and this top-down air flow forms the valley wind. At night, when the sun has set, the summit and the mountainside cool very quickly, so the thin layer of air near the summit and the mountainside also cools quickly, while the air that accumulates in the valley is still warm, and the cold air near the summit and the mountainside flows to the bottom of the valley, forming a valley wind.
In most parts of our country, there is more southeast wind in summer and northwest wind in winter, this is because our country is east of the Pacific Ocean, and in summer, the temperature of the continent is higher than that of the ocean, and the cold air flows from the ocean to the mainland, so the southeast wind blows. In winter, the temperature on the continent is lower than that of the ocean, and the cold air from the continent flows to the ocean, so the northwest wind blows more.
Whether it is the sea breeze, land breeze, valley breeze, northwest wind, southeast wind, it is formed by the sun's irradiation that causes the earth's atmosphere to flow.
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