Evaluating Human-Induced Changes in Land Surface Temperature in the Southern Caspian Sea Area: The Case of Anzali Free Zone Development

Authors:
  • PSPayam Alemi Safaval
    Payam Alemi Safaval
  • ZAZahra Azizi
    Zahra Azizi
  • BGBehnaz Ghaderi
    Behnaz Ghaderi
  • NMNima Farid Mojtahedi
    Nima Farid Mojtahedi
  • SNSeyed Ahmad Neshaei
    Seyed Ahmad Neshaei
  • HTHossein Torabi
    Hossein Torabi
  • MZMasoud Kheirkhah Zarkesh
    Masoud Kheirkhah Zarkesh
  • SASeyyed Hassan Hashemi Ashka
    Seyyed Hassan Hashemi Ashka
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Abstract
Human-induced land use and land cover changes significantly influence the Earth's surface temperature, especially in rapidly developing regions. This study investigates the impact of urban development associated with the Anzali Free Zone Organization, located along the southern coast of the Caspian Sea, on land surface temperature (LST) changes over a 24-year period (2000–2024). Multitemporal Landsat ETM+ and OLI satellite imagery were employed to analyze spatial and temporal variations in surface temperature. Following radiometric, atmospheric, and reflectance corrections, the Normalized Difference Vegetation Index (NDVI) was calculated to derive vegetation fraction (PV), which in turn was used to estimate surface emissivity. Brightness temperature was then computed using thermal bands, and LST was derived via the single-channel algorithm. The results indicate a significant alteration in LST, ranging from 16.5°C to 41.7°C in 2000 and from 20.1°C to 37.3°C in 2024. These temperature variations correlate strongly with reduced vegetation cover and the expansion of impervious surfaces driven by increased housing demand, trade, and tourism in the Free Zone. The findings demonstrate a clear manifestation of the Urban Heat Island (UHI) effect, underscoring the ecological consequences of unchecked urbanization. This study highlights the need for sustainable land use planning and vegetation conservation strategies to mitigate thermal stress and preserve environmental integrity in coastal urban areas.