Is the atmospheric pressure lowered after fogging? Why?

Category: Life >> Common Sense of Life

Analysis:

The air pressure is higher in sunny weather and lower in rainy, foggy and other weather conditions. Because:

The earth's surface is covered with a thick layer of atmosphere. Due to the existence of gravity, the atmosphere exerts a considerable pressure on the earth's surface, which is called "atmospheric pressure".

The atmosphere is constantly moving. There are many factors that affect the movement of the atmosphere, causing the density of the atmosphere to change. Let’s choose the simplest one. The surface of our earth is unevenly hot and cold. , in hot places, the atmosphere rises, and in cold places, the atmosphere rises. In hot places, the air pressure is high at the top and low at the bottom. In cold places, the air pressure is low at the top. In areas with different heights, the air pressure is different. High pressure areas are called high pressure areas. , the area with low air pressure is called a low pressure area.

In the same place, is it always a high-pressure area or a low-pressure area? Definitely not, so the air pressure will change at different times in the same place.

The high-pressure area above will replenish air to the low-pressure area, and the high-pressure area on the ground will diffuse air to the low-pressure area. We know that air movement mainly includes vertical movement and horizontal movement. The horizontal movement of air forms wind, and the movement of air Rising and sinking will affect the weather conditions: if it is controlled by low pressure, the atmosphere in the center of the low-pressure area will rise, the temperature will drop, and it will easily form clouds and cause rain. Therefore, low pressure brings rainy weather. If it is controlled by high pressure, the atmosphere in the center of the high-pressure area will sink, the temperature will rise, and water vapor will not condense easily, so the weather will be clear.