Document Type : Research Article
Authors
1
Professor in Watershed Management, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
2
PhD Candidate in Watershed Management, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
10.22067/geoeh.2025.88391.1492
Abstract
Given the significance of urban heat islands, this study examined Sari City's thermal comfort classification and the urban thermal field variance index. After obtaining Landsat 8 satellite images for 11 years, the urban area thermal variance index was extracted based on land surface temperature and average temperature, and thermal comfort was classified based on it. The results showed the lowest recorded average surface temperature in Sari city on August 8, 2013, was 30.1 °C, while the highest recorded average temperature on July 12, 2018, was 40.62 °C. Therefore, it can be seen that areas with residential and commercial buildings and artificial coverings have the highest temperatures. At the pixel level, the lowest Urban thermal field variance index was determined as -0.352 on August 1, 2022, while its highest value was 0.122 on August 7, 2016. The highest level of thermal comfort, 58.49% of the area, was recorded on July 10, 2023, for the excellent, good, and normal classes; and the lowest level, 50.39% of the area, was recorded on August 8, 2023. On August 8, 2013, bad, worse, and the worst thermal comfort classes had the largest coverage area (49.61 percent of the area), and on July 10, 2023, the lowest coverage area (41.51 percent of the area). Based on these results, it can be seen that the central areas of Sari and other areas of the city that have less green cover or where unprincipled construction has been carried out without considering urban life patterns are placed in the lower comfort category.
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