Climate Modeling in Tehran & Mazandaran Provinces by LARSWG and Comparing Changes in Northern and Southern Central Alborz hillside

In recent decades increasing the green house gases caused damage to the Earth climate balance which is named Climate Change. Most important effects are increasing in mean temperature، flood، storm، hail and sea levels. In this article، synoptic stations in Mazandaran and Tehran provinces is investigated from 1988 to 2005 and by LARS-WG modeling and by downscaling GCM data which is predicted for 2010-2039. The main purpose of this research was comparing changes between Northern and Sothern hillside of Central Alborz Mountain. Finally، according to the rain and temperature incensement in both provinces، development of deserts happens and this negative expanding in the Southern side of Alborz will be more extensive. Also، heavy rain falls may increase in both sides، but in Mazandaran more sever rain fall will occur and in Tehran rain fall will happen in short period of times and more frequently.