نویسندگان
1 دانشیار اقلیم شناسی، دانشگاه شهید بهشتی، تهران ایران.
2 دانشجوی دکترای اقلیم شناسی، دانشگاه شهید بهشتی، تهران ایران.
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
The role of temperature and the importance of its transformation has led to serious attention to this climatic phenomenon in recent decades. The rising temperature trend in some parts of Iran and its possible consequences have led to serious concerns for researchers and planners. The purpose of this study is to spatially change the temperature trend in Iran during the last four decades. To evaluate this trend, the European Air Force Medium-Term Prediction Center (ECMWF) ERA Interim database was used during the period 1979-2015 with a spatial resolution of 0.125 0 0.125 degrees for each month with 9966 cells. Manp – Kendall and Sen’s Slope nonparametric methods were used to detect the temperature trend. The results showed that the four months of February, March, May and October experienced a one-way (increasing) temperature trend. The maximum average rate of the country's upward trend was related to the winter season and the minimum belonged to the autumn season. In all months of the year, regions of the country that were between 30 and 35 degrees north have experienced the most significant upward trend. The territory of cold and temperate regions of the country has been subject to increasing temperature more than other regions. Also, the negative trend of southeast and south (Bushehr coasts) of Iran due to four reasons: 2 - increase of airborne airways; 3- Water vapor is rainy and 4- Clouds and temperature change amplitude. The maximum average temperature slope of the country with 0.11 ° C is related to February and the minimum is 0.002 ° C in November. In general, Iran's winters are getting warmer and this will be considered a serious threat to the snow-covered centers of the country.
کلیدواژهها [English]
869