Relationship between air pressure and altitude

The relationship between air pressure and altitude is that the altitude increases and the air pressure decreases.

In the range of 3000M, every time the air pressure increases 12M, the air pressure decreases 1mmHg, which is about 133Pa. Atmospheric pressure is related to altitude, atmospheric temperature and atmospheric density, and generally decreases exponentially with altitude. The air pressure changes every day and every year. In a year, the air pressure in winter is higher than that in summer.

In a day, the air pressure has a maximum value and a minimum value, which appear at 9 ~ 10 and 15 ~ 16 respectively, and the second high value and the second low value appear at 2 1 ~ 22 and 3 ~ 4 respectively. The daily variation of air pressure is small, generally 0. 1 ~ 0.4 kPa, and decreases with the increase of latitude. The change of air pressure is closely related to wind and weather, so it is an important meteorological factor.

Impact of altitude change:

Atmospheric pressure is not only related to altitude, but also to weather. Many studies have found that the influence of atmospheric pressure on people can be summarized into three categories: first, it increases the occurrence of diseases; Some clinical studies show that the incidence rate is related to seasons; Second, seasonal changes will also affect the individual's psychology, such as the impact on emotions.

When the season changes, the incidence of mental illness, suicide rate and social conflicts will be affected; The third influence is the influence on people's behavior. Many studies show that the school's separatist behavior and public security chaos change with the weather and air pressure. Generally speaking, low pressure is accompanied by high altitude and stormy weather, while high pressure is usually sunny.

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