Traditional Culture Encyclopedia - Weather inquiry - Why is the air pressure higher on sunny days than on cloudy days?

Why is the air pressure higher on sunny days than on cloudy days?

Sunny days make warm air rise and cold air fall, forming a high-pressure system. Sunny days will make the surface temperature rise, warm air rise and cold air fall, forming a high-pressure system. On cloudy days, it is difficult for the sun's rays to directly illuminate the ground, the surface temperature is low, the air relative humidity is high, and it is difficult for the air to rise to form a high-pressure system, so the air pressure is low. Air pressure refers to the weight of gas per unit area, generally in Pascal. Air pressure is related to air density, which is affected by temperature and humidity.