Climatic regionalization of North-west of Iran by Litynski method and GIS

In this research, climates of Northwest of Iran have been zoning by make used of Geographical Information System (GIS) software (Arc info & Arc view) and utilized numerical ability of Litynski climatic classification method. First, isopleths for each climatic factor on the bases of Litynski method by Arc info, Arc View and SPSS software were calculated. Then every climatic factors classifed based on defined classes in used method. Finally were extracted six climatic maps. The results show there are climatic subtypes in Northwest of Iran. The statistical mode of climatic zones is - class that its areas is km or % of total areas.