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Abstract

Summary

Urban expansion alters land surfaces and local climate. Therefore, it is essential to assess the impact of urbanisation on microclimate regulation. In this work, we assessed the land surface temperature (LST) in a neighbourhood located in Vilnius (Jeruzale), Lithuania, using a thermal unmanned aerial vehicle to map microclimate regulation using LST and a proxy. The thermal images were validated with ground temperature measurements of different land uses (urban, grassland, and forest). The results showed that the model validation was accurate (adjusted R2= 0.941; RMSE: 1.522) considering all the land uses. The validation was better in urban surfaces (adjusted R2= 0.992; RMSE: 0.409) than in forested areas (adjusted R2= 0.520; RMSE: 2.187). Urbanised areas had a reduced capacity to regulate the microclimate compared to forested areas. Also, it creates a heterogeneous mosaic in temperature distribution. There were significant differences between microclimate regulation among land uses. UAV and ground-measured temperatures were significantly higher in urban areas than in forested ones.

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/content/papers/10.3997/2214-4609.2025510014
2025-04-14
2026-02-14
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