@ARTICLE{Asghari, author = {Fallah Ghalhar, Gholamabbas and Farhang Dehghan, Somayeh and Asghari, Mehdi and }, title = {Trend analysis of Humidex as a heat discomfort index using Mann-Kendall and Sen’s slope estimator statistical tests}, volume = {9}, number = {2}, abstract ={Background: The aim of this research was to assess the Humidex (HD) trends as a thermal discomfort index by analyzing meteorological data during a 30 year period of summertime in Iran. Methods: For this purpose, data regarding average temperature and relative humidity were collected daily from 40 different synoptic meteorological stations during a 30-year statistical period (1985-2014). The HD index was calculated based on temperature and relative humidity according to an equation introduced by Masterton and Richardson. The Mann-Kendall and Sen’s slope tests were performed to analyze the changing trend of the HD. Results: Based on the findings, in 72% of the meteorological stations, the HD followed an upward trend, so that 40% of them was statistically significant. The changing trends in temperature during summertime throughout the studied years fluctuated greatly but generally, in many regions such as the arid, semi-arid, and humid regions, this trend was mostly incremental. Also, the changing trends in relative humidity in all regions was decremental throughout the years under study. Conclusion: The changing trend of the HD, which is based on temperature and humidity, was incremental in arid and semi-arid regions and decremental in the Mediterranean and humid regions. }, URL = {http://ehemj.com/article-1-950-en.html}, eprint = {http://ehemj.com/article-1-950-en.pdf}, journal = {Environmental Health Engineering and Management Journal}, doi = {10.34172/EHEM.2022.18}, year = {2022} }