واکاوی روند تغییرات شاخص‌های حدی دمایی ایران با استفاده از مدل‌های CMIP6

This research aims to investigate the conditions of extreme temperature in Iran in its future periods based on the predictions of atmospheric general circulation models. The data used in this research includes the average minimum and maximum daily temperature data of the CNRM-CM6-1 model from the CMIP6 model set during the 2020-2060 period under the ssp126 and ssp585 scenarios. A set of 14 Extreme temperature indices recommended by the CCL/CLIVAR expert group was calculated for future periods using programming in the Matlab software and the trend of changes in each of the indices was examined using the Mann-Kendall test. The results of the cold and warm air temperature indices generally showed that the cold air temperature indices will decrease and the warm air temperature indices will increase in the future, and the increasing trends of most of the warm air temperature indices are significant in most parts of the country. Among the warm indices studied for the period 2020-2060 under both SSP126 and SSP858 scenarios, SU25, TXx and TNx indices for Iran will increase significantly and at a 95% significant level, and among the cold indices, FD indices and ID will decrease significantly (significant at 95% level).