Estimasi Suhu Permukaan dan Suhu Udara di Kota Sabang, Aceh, Indonesia

Abstract

This community service aims to estimate surface temperature (Ts) and air temperature (Ta) in Sabang City, Aceh, using Landsat 8 satellite imagery. The methodology involves processing thermal imagery to calculate surface temperature, net radiation (Rn), ground heat flux (G), sensible heat flux (H), and latent heat flux (E). The results indicate that surface temperature varies from 21.23°C to 29.37°C, with higher temperatures in the northern and eastern regions, which are dominated by built-up areas, while lower temperatures are found in the western and central regions covered with dense vegetation. Air temperature ranges between 16.7°C and 33°C, reflecting a similar pattern where vegetated areas display lower temperatures. Energy balance analysis shows that vegetated areas are primarily influenced by ground heat flux (G), accounting for 61%, while non-vegetated areas are dominated by latent heat flux (E) at 71%. Sensible heat flux (H) contributes a smaller proportion, at 9% in vegetated areas and 11% in non-vegetated areas. These findings highlight the crucial role of vegetation in regulating environmental temperatures and provide a foundation for sustainable urban planning in Sabang City.