Spatiotemporal Influence of Land Use/Land Cover Change Dynamics on Surface Urban Heat Island: A Case Study of Abuja Metropolis, Nigeria

Rapid urbanization in cities and urban centers has recently contributed to notable land use/land cover (LULC) changes, affecting both the climate and environment. Therefore, this study seeks to analyze changes in LULC and its spatiotemporal influence on the surface urban heat islands (UHI) in Abuja metropolis, Nigeria. To achieve this, we employed Multi-temporal Landsat data to monitor the study area's LULC pattern and land surface temperature (LST) over the last 29 years. The study then analyzed the relationship between LULC, LST, and other vital spectral indices comprising NDVI and NDBI using correlation analysis. The results revealed a significant urban expansion with the transformation of 358.3 sq. km of natural surface into built-up areas. It further showed a considerable increase in the mean LST of Abuja metropolis from 30.65 degrees C in 1990 to 32.69 degrees C in 2019, with a notable increase of 2.53 degrees C between 2009 and 2019. The results also indicated an inverse relationship between LST and NDVI and a positive connection between LST and NDBI. This implies that urban expansion and vegetation decrease influences the development of surface UHI through increased LST. Therefore, the study's findings will significantly help urban-planners and decision-makers implement sustainable land-use strategies and management for the city.

Automated summary

The rapid urbanization in cities has led to significant land use/land cover changes, impacting the climate and environment. This study in Abuja, Nigeria, analyzed the relationship between LULC changes and surface urban heat islands (UHI) using Multi-temporal Landsat data over 29 years. The results showed a considerable urban expansion and increase in mean land surface temperature (LST), indicating a direct link between urban expansion, vegetation decrease, and the development of surface UHI.