The weather is closely related to the movement of air masses, which separate in the troposphere in the process of general atmosphere circulation. The mass of air is characterized by the fact that it occupies a huge area, sometimes of the order of many millions km2, inside which there is more or less the same, vertical variability of temperature, humidity, degree of pollution, etc. In the mass of air that persists for a long time over a given area is shaped in the exclusion of the substrate’s influence (heat and water vapor exchange with this substrate), the characteristic vertical distribution of the physical parameters mentioned above and the specific type of weather. The area in which the air mass is formed is called the source area. Four basic air masses formed in the main source areas – Arctic (Antarctic), Polar, Tropic and Equatorial – are separated from each other by narrow transition zones. These zones bear the name of atmospheric fronts.
How do weather fronts affect the weather?
Air masses moving from the source area over an area with different physiographic properties shape the meteorological conditions within it. Flowing or staying longer over a new substrate, the mass of the novel varies with its original properties. In other words, the land is a land, or water, which enriches the mass of air with water vapor.