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Investigation of Diurnal and Seasonal Land Surface Temperature

Urban heat island (UHI) is the land surface temperature (LST) in the city or urban area (That is) greater than its surrounding rural areas caused by human activities. In general, the effect of UHI is more significant at night than it is during the daytime. A variety of approaches are currently being used to estimate LST and emissivity products from satellite and aircraft remote sensing data. This study investigates the LST fluctuation in the UAE during 2020 at different seasons, daytime and night- time, using four geographical categories: Urban Area-Far Coastal Area (A), Coastal Area (B), Desert Area (C), and Mountainous Area (D). Using 8-day composite LST products from the MODIS (Moderate Resolution Imaging Spectroradiometer) satellite with 1 Km resolution, the mean LST was calculated in summer and winter for both daytime and night-time. The findings demonstrate that UHI had a more substantial effect at night than during the day. However, the reverse situation occurred throughout the day. Since sand has a relatively lower heat conductivity, Desert Area (C) shows higher LST. The results of this study are crucial because the link between urban development and the UHI is clearly represented. Also, it will enable planners and environmentalists to understand the effects of UHI on LST.