Processes of Global warming

Major sources and processes of Global warming include ozone depletion and greenhouse effects. Ozone depleting substances contribute to global warming by increasing UV radiation.

1.       Ozone Depletion: The stratospheric ozone layer is mostly concentrated between attitudes of 12km to 35 km from earth’s surface. It is considered as protective shield and earth’s umbrella because it prevents ultra violet (UV) solar radiation from reaching the earth’s surface. Thus the presence of ozone layer in the stratosphere is of vital significance for all biota including plants, animal and man in the biosphere. In the absence of this layer no life is possible in the biosphere because all the UV rays of the sun will reach earth’s surface and consequently temperature of the earth’s surface and lower atmosphere will rise to such an extent that the earth will turn into a blast furnace.

The ozone is produced by the actions of UV rays on ordinary oxygen atoms by the photochemical process which is responsible for the constant transformation of oxygen to ozone and form ozone back to oxygen.

O₂ + O ≈O₃

Thus constant formation and destruction of ozone is natural process if not interfered by man.