Abstract
This chapter discusses the climatological changes that give rise to changes in the outside weather conditions. The day-to-day changes in weather conditions are caused by movement of air masses, especially in the form of fronts, and by local phenomena resulting from land patterns. Thermal force due to the temperature difference of the air masses result in a pressure difference. Geostrophic force is set up by the rotation of the earth on its axis. The force acts at right angles to the direction in which the air is moving with an intensity varying with the sine of the latitude. Contact between warm and cold masses cause waves to be formed along the line of contact, or “front” in a way analogous to the waves being formed due to a contact between wind and sea. When cold air of low absolute humidity moves towards warmer areas, the heating of the air reduces its relative humidity; however, when warm, moist air is cooled, condensation takes place resulting in cloud and rain. A well-known example of this is the monsoon.
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