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<p>This study investigates the spatial and temporal variability of Surface Urban Heat Island Intensity (SUHII) across six cities in the Apulia region (southern Italy) using summer ECOSTRESS land surface temperature observations (2018–2025) integrated with Urban Atlas land–use data. The analysed cities encompass heterogeneous urban configurations within the Mediterranean climate–change hotspot and represent a large portion of the regional population. The results reveal a coherent diurnal SUHII cycle, with negative daytime and positive nighttime anomalies, although marked inter–city differences emerge depending on coastal exposure, urban density, vegetation, and industrial/commercial land use. Coastal cities are strongly affected by sea–breeze circulation, whereas industrial districts, particularly in Taranto, maintain persistent positive anomalies throughout most of the diurnal cycle. Statistical analyses further highlight the distinct thermal behaviour of industrial surfaces relative to vegetated and low–density sectors. The integration of ECOSTRESS and Urban Atlas proved effective in resolving fine–scale thermal heterogeneity across different urban fabrics. This study represents the first comparative multi–city SUHII analysis for major Apulian urban areas and provides a scalable framework for future studies integrating urban climate modelling and extreme heat assessments.</p>

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Surface urban heat island (SUHI) dynamics in the major Apulian cities using remote sensing approaches

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年8月5日

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  • Antonio Esposito,
  • Gianluca Pappaccogli,
  • Riccardo Buccolieri

摘要

This study investigates the spatial and temporal variability of Surface Urban Heat Island Intensity (SUHII) across six cities in the Apulia region (southern Italy) using summer ECOSTRESS land surface temperature observations (2018–2025) integrated with Urban Atlas land–use data. The analysed cities encompass heterogeneous urban configurations within the Mediterranean climate–change hotspot and represent a large portion of the regional population. The results reveal a coherent diurnal SUHII cycle, with negative daytime and positive nighttime anomalies, although marked inter–city differences emerge depending on coastal exposure, urban density, vegetation, and industrial/commercial land use. Coastal cities are strongly affected by sea–breeze circulation, whereas industrial districts, particularly in Taranto, maintain persistent positive anomalies throughout most of the diurnal cycle. Statistical analyses further highlight the distinct thermal behaviour of industrial surfaces relative to vegetated and low–density sectors. The integration of ECOSTRESS and Urban Atlas proved effective in resolving fine–scale thermal heterogeneity across different urban fabrics. This study represents the first comparative multi–city SUHII analysis for major Apulian urban areas and provides a scalable framework for future studies integrating urban climate modelling and extreme heat assessments.