عنوان مقاله [English]
Climatic zoning and identify the most important elements affecting the region, is one way of understanding the characteristics of climate regions. In this study, in order to correct and comprehensive understanding of Iran's West Region, climatic zoning with new methods such as statistical factor analysis and cluster analysis was performed. For this purpose, 18 climate variables related to 25 weather stations in five provinces of the West of Country (Kermanshah, Kurdistan, Hamadan, Ilam, Lorestan) was selected Results of the studies the method of factor analysis on climate showed that the 6 factors that affect climate in order of importance these factors are: temperature, precipitation, atmospheric moisture, dust, cloudy and windy. Cluster analysis on six climatic factors are five climatic zones in the West showed. The results also showed that nearly 54 percent of temperature and precipitation alone can explain the behavior of the climate.