Samira Ibrahim Mohamed

The stratospheric ozone plays an important role in the protection of the biosphere from the dangerous ultraviolet radiation of the sun. It also forms the temperature structure of the stratosphere and therefore, has a direct influence on the general circulation and the surface climate The tropospheric ozone can damage the biosphere, impact human health, and plays a role as a powerful greenhouse gas. That is why the understanding of the past and future evolution of the ozone in di_erent atmospheric layers, its influence on surface UV radiation doses, and human health is important