Investigation and Evaluation of urban thermal island using night satellite images of TERRA and SENTINEL 3 (Case study: Tabriz metropolis)

Document Type : Research Paper

Authors

1 Professor, Department of Geomorphology, Faculty of Social Sciences , University of Mohaghegh Ardabili- Ardabil,Iran

2 , PhD student in Geomorphology, University of Mohaghegh Ardabili, rdabil

10.22034/gp.2024.55836.3118

Abstract

The aim of this study is to calculate the nocturnal urban heat island (UHI) and its relationship with urban land use in the metropolitan area of Tabriz. Landsat satellite data and Sentinel 3 data were used for this research. The Landsat satellite data was processed in ENVI 5.3.1, and the Sentinel 3 data was processed in SNAP software, with further statistical calculations and outputs performed using ARCGIS 10.8. In the Landsat data, the minimum temperature was 5.14°C and the maximum temperature was 23.91°C, with the highest temperatures observed in bare land, transportation, agriculture, industrial, residential areas, as well as low-lying areas and areas lacking vegetation cover. The highest percentage of area with temperatures ranging from 15.16°C to 17.88°C was approximately 45.75% of the city. Areas with temperatures above 19°C covered an area of approximately 31.45 square kilometers, which accounts for 12.58% of the city. In the Sentinel data, the minimum temperature was 12.84°C and the maximum temperature was 21.62°C, with similar land use patterns to the Landsat data. Areas with temperatures ranging from 17.29°C to 18.45°C had the highest percentage of area, and areas with temperatures above 19°C covered approximately 17.06 square kilometers, accounting for 6.82% of the total area. Based on the results, which showed similar temperatures and land use patterns in both satellite data, it can be concluded that either satellite can be used for extracting the urban heat island (nighttime temperature).

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