Why is the high pressure temperature low and the low pressure temperature high?

The air above the high-pressure area will drop, because the atmospheric pressure will increase with the decrease of height, so when the air at high altitude drops, the pressure will increase, the volume will decrease, the temperature will increase, and the condensate in the air will evaporate and dissipate. Therefore, the high-pressure central area is not conducive to the formation of clouds and rain, and it is often sunny.

If the air pressure in a certain area is low, the air in the surrounding area will flow into the area horizontally, causing the air in the area to rise, the rising air will expand due to the pressure drop, the temperature will drop, and the water vapor in the air will condense. Therefore, it often rains in the central area of low pressure.

Extended data

According to its thermal structure, high pressure can be divided into two types:

The most common is cold high pressure, which is caused by surface cooling. After the surface temperature drops, the air temperature near the surface also drops, and the cold air lacks heat energy, so it is difficult to rise. It is heavier and denser air, and the surrounding air is warmer and lighter, so the air flow changes from cold air to the surrounding direction, forming a cold high-pressure center. For example, the high pressure in Antarctica and Siberia.

The subtropical high is caused by the strong updraft at the equator, which forms the upper air pressure and flows in the direction of low pressure from south to north. Because of the geostrophic bias, these air flows from the equator gradually turn from west to east, no longer move along the meridian direction, and accumulate and sink near 30 degrees north and south latitude, forming a high pressure and being relatively hot.

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