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WHAT atmospheric pressure is normal

What is the normal atmospheric pressure

On all the inhabitants of planet earth on top of the column of air presses weighing fifteen tons.

That he did not from human wet spot, the pressure inside the body balances the pressure of the atmosphere.

And only if different atmospheric parameters from normal health of some people is getting worse.


For normal atmospheric pressure is usually chargedair pressure at sea level at a latitude of 45 degrees at a temperature of 0C. Under these ideal conditions, the column of air presses on each square centimeter of the area with the same force as the mercury column height of 760 mm. This figure is an indicator of normal atmospheric pressure.
Atmospheric pressure depends on the height above sea level. On the hills may differ from ideal, but they, too, will be considered the norm.

Norms of atmospheric pressure in different regions

With the increase in the atmospheric pressure is lowered. Thus, five kilometers altitude pressure readings are about two times less than at the bottom.
Because of Moscow's position on the hill,Pressure indicators are considered the norm here 747-748 mm Hg. In St. Petersburg, the normal pressure - 753-755 mm Hg. This difference is explained by the fact that the city on the Neva is lower than in Moscow. In some districts of the city can be found in normal-pressure common 760 mm Hg. For Vladivostok normal pressure is 761 mmHg. And in the mountains of Tibet norm - 413 mm Hg.

Exposure to atmospheric pressure on people

Man gets used to everything. Even if the normal pressures are low compared with the ideal of 760 mm Hg, but are the norm for this area, people will be comfortable.
On the well-being affects the sharp fluctuation of atmospheric pressure, ie, decrease or increase the pressure by at least 1 mm Hg for three hours
By lowering the pressure there is a lack ofoxygen in human blood cells in the body hypoxia, heart rate increases. There are headaches. Difficulties observed on the part of the respiratory system. Because of poor blood supply to the human can disturb joint pains, numbness in the fingers.
Increasing pressure leads to an oversupply of oxygenin blood and tissues. Increased vascular tone, which leads to their spasms. The result is that blood circulation of the body. There may be visual disturbances in the form of the appearance of "flies" before the eyes, dizziness, nausea. The sharp increase in pressure to large quantities can lead to rupture of the ear drum membrane.

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