Investigative and Comparative Approach for Worldwide Information and local perceptions Induced by Climate Change and its Correspondence

A new challenge which the world will face in near future is the reduction of water resources regarding to global climate changes. Climate change is one of the phenomena which will threats future of the universe. Iran locates in an arid and semi-arid region and has limited water resources. Based on global and Intergovernmental Panel on Climate Change (IPCC) board database and the statistics of some selected synoptic stations (Tabriz, Bilghan, Mashhad) to obtain an appropriate spatial distribution in northern part of the country, we have considered the climate change and its effects on Iran`s water resources. Based on IPCC scenarios the temperature will grow 1-2 degrees in these regions till 2020 and precipitation will decline to 20%, this will directly influence the condition of water resources of these regions and new challenges. This procedure and its changes will be considered through statistical analysis and graphical description of data gathered through selected synoptic stations databases. Regarding climate changing effects on water resources, studying the karst water resources of Northern Khorasan indicated a significant reduction among the springs' discharge in these resources.