Earth has conditions suitable to support life and thus is our home and we rely completely on it for our existence. The atmosphere surrounding the Earth contains the air that we breathe it also controls the solar and cosmic radiations plays role in maintaining planets heat balance and biogeochemical cycles. Many physico-chemical phenomenon happen in the atmosphere like formation of clouds, formation and breaking of Ozone gas molecule, control of ultraviolet radiations, atmospheric circulation (atmospheric winds), pressure production, transportation and release of electric charge, temperature variations in different heights, condensation of moisture, different forms of precipitations, aerosol transformation and gas-gas, gas-particle interactions etc. Most of the atmospheric phenomenon are influenced by the gravitational force and rotational and linear movements of the Earth.
Some of the important phenomenon which happen in the Earths atmosphere that we need to understand and ways and means to study them have been discussed under this theme.