2.1. Importance of Water Vapour

The water vapour present in the atmosphere is an important factor for the weather conditions in a particular region. The amount of water vapour present in the atmosphere influences the nature and amount of precipitation, the amount of loss of heat through radiation from the earth’s surface, the surface temperature, the latent heat of the atmosphere, the stability and instability of the air masses. Necessary energy for the development of storms (cyclones, hurricanes etc.) is provided by the water vapour in the form of latent heat energy.