At the behest of the meteorology, An Isobar or Isobar is a pressure isogram, which consists of a line of equal or constant pressure, on a graph, a plot or map.
Except for some exceptions, isobars are lines that join all the points on a map that have the same atmospheric pressure, which is measured in bars. All the isobars of a meteorological map will allow us to know the strength of the wind and the direction it has in a certain area.
Meanwhile, related to isobars, we find ourselves at alobaras (line that delimits an area in which there was a change in atmospheric pressure), the analobars (in case the aforementioned change is positive) and the you will catalog (when on the contrary the change is negative).
The atmospheric pressure It is the pressure exerted by atmospheric air at any point in the atmosphere. At a specific point, atmospheric pressure will represent the weight of a straight column of air that will extend from that point to the upper limit of the atmosphere.
As a consequence, the density of the air increases when the height increases, it is impossible to calculate the mentioned weight, but yes, it is very easy to measure it as opposed to how difficult it is to calculate it.
The meteorological changes cause variations in the atmospheric pressure of a certain place, as well as the atmospheric pressure decreases according to the altitude, it will decrease in the levels close to the sea.
Regarding the variations that atmospheric pressure may experience, we find that when the air is cold, it descends, achieving stability and achieving the phenomenon known as a thermal anticyclone. On the contrary, when the air is hot, the pressure will rise, causing the pressure to drop and will lead to an unstable climate, which will eventually lead to a cyclone or thermal storm.
Although cold air and hot air refuse to mix, when the unexpected situation they encounter occurs, the cold air will push the hot air upwards leading to instability and dynamic squall, as long as this contact zone is called as front.
