Definition of atmospheric pressure

Atmospheric pressure is known as the pressure exerted by the air at any point in the atmosphere. Although when one refers to this type of pressure, one is talking about the atmospheric pressure that occurs on planet earth, the same question can be extended to other planets and even satellites.

The mean value of the pressure of the Earth's atmosphere is 1013.25 hectopascals or millibars at sea level, which is measured at a latitude 45 °.

Then, when the air is very cold, what happens with the atmosphere is that it descends and the pressure increases, which leads to witnessing a state of stability, giving rise to what is called a thermal anticyclone and if, on the contrary, the air is very hot and rises, lowers pressure and causes what is known as instability, forming a cyclone or storm thermal.

But it can also happen that sporadically something happens that does not happen frequently because they show different density and what is it that hot air and cold air mix, but when both are on the surface the air The cold pushes the hot air upwards causing the pressure to drop and a phenomenon of instability. And if, on the contrary, the encounter between both airs occurs but in height, they descend in convergence

dynamic, generating an increase in pressure and causing stability in the atmosphere as a counterpart of the previous case.

Regarding the origins of the term and the studies and research per se that were carried out in this regard question, they go back to antiquity, many sages wondered, although without the correct elements in their hands, about themeHowever, it only began to spread towards the end of the seventeenth century when the experiment which finally proved it without a doubt.

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