Is the atmospheric pressure stronger in winter or summer?

The atmospheric pressure is stronger in winter.

The air pressure is higher in winter than in summer. The magnitude of air pressure is related to altitude, atmospheric temperature, atmospheric density, etc., and generally decreases exponentially as altitude increases. There are diurnal and annual variations in air pressure. During the year, the air pressure is higher in winter than in summer. During the day, the highest and lowest air pressure values ??occur at 9 to 10 o'clock and 15 to 16 o'clock respectively.

The daily variation in air pressure is small, generally 0.1 to 0.4 kPa, and decreases with increasing latitude. Changes in air pressure are closely related to wind and weather conditions, and are therefore important meteorological factors. Commonly used instruments for measuring air pressure in meteorological observations include mercury barometers, empty box barometers, and barometers. The pressure at the height of a vertical mercury column of 760 mm when the temperature is 0°C. The standard atmospheric pressure was first measured by Italian scientist Torricelli.

Extended information:

It is the atmospheric pressure acting on unit area, which is equal to the weight of the vertical air column extending upward to the upper boundary of the atmosphere per unit area. The size of air pressure is related to conditions such as altitude and temperature. Generally decreases with height. In the horizontal direction, differences in atmospheric pressure cause the flow of air. The unit used to express air pressure is the height of the mercury column.

The pressure of a gas is caused by the frequent collision of a large number of molecules with the walls of the container. The collision time of a single molecule against the container wall is extremely short, and the effect is discontinuous. However, a large number of molecules frequently collide with the container wall, and the force on the container wall is continuous and uniform. The ratio of this pressure to the area of ??the container wall is the pressure. .

Reference: Baidu Encyclopedia_Air Pressure