Abstract
This paper concentrates on the possible relationships between the climate change and desertification in arid regions. It is stated that the global warming will cause vertical expansion of air volumes over the three free water surfaces (Red Sea, Arabian Sea and Arabian Gulf) around the Arabian Peninsula (AP) causing air movement enhancement towards inlands and hydrological cycle intensification. Finally, for comparison purposes the rainfall predictions up to 2100 on the basis of NCAR-A2 scenario is given as the product of quadrangle downscaling (QD) methodology. It is shown that climate change may accelerate desertification at coastal areas of the AP.