1 گروه آموزشی جغرافیای طبیعی، دانشکده ادبیات و علوم انسانی، دانشگاه محقق اردبیلی، اردبیل، ایران
2 گروه آموزشی جغرافیا، دانشکه ادبیات وعلوم انسانی، دانشگاه محقق اردبیلی، اردبیل، ایران
عنوان مقاله [English]
The unconventional climate change and global warming are among the most important problems facing humanity. The temperature change is more important because of its widespread effects. In this study, the average daily maximum temperature for 92 synoptic stations of Iran during the statistical period of 25 years (1991-2015) were used to study the temporal and spatial variations of the maximum temperature of Iran and its zoning. The study years were divided into five periods (1991-1995, 1996- 2000, 2001-2005, 2006-2010 & 2011- 2015). Then, all of the courses have been surveyed by interpolating and evaluating for spatial and temporal variations (annual and seasonal mean of the whole period, Annual and seasonal average of 5 years & difference between the maximum temperature of the last 5 years and the first 5 years). The average spatial variations of the maximum temperature in the studied area have been interpolated by ordinary kriging method and its sub-models. Results of the study showed that the average of the maximum temperature in the most of stations in the last 5 years of 2011-2015 compared to the first 5 years of 1991-1995 has been increased. The rate of this increase in Iran for the annual scale, seasons of spring, summer, autumn and winter has been 1.5, 2.2, 1.3, 0.5 and 2 degrees Celsius respectively. The spring season, the highest and autumn, had the lowest average temperature increase. Generally, most of the regions in Iran faced with rising temperature, and this increase in the spring in the northern half of the country, in summer and yearly in the northwest and northeast, in the autumn in the southern half of the country and in the winter in half Western country were more than other areas.