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<p>Overheating of public spaces, which is due to the overall temperature increase caused by the indisputable climate change, is a parameter affecting human health and quality of life in contemporary cities, while at the same time it can increase energy consumption of buildings, especially during the summer period where cooling energy demand raises significantly. This study investigates the way urban geometry can influence the microclimatic conditions of the Greek urban landscape. The mitigation measures, such as green interventions on buildings and open spaces are analyzed to define the most efficient way to improve the microclimate in urban neighborhoods. The methodology examines urban typologies, representative of the Greek urban tissue of the city of Thessaloniki to calculate, through simulations, the temperature differences, related to the UHI&#xa0;(Urban Heat Island) effect and to correlate them to the geometry of the urban space. Three H/W (height to width) ratios are analyzed under a base case scenario and a green scenario. Sparse and dense tree canopies are also examined to define the effect of leaf area density (LAD) to the potential air temperature. The results of the research prove that the microclimatic environment is strongly affected by the geometry of the urban canyons and by the presence of green areas. The maximum temperature difference calculated between the maximum potential air temperature of the 10&#xa0;m street width without greening and the 8&#xa0;m width street scenario with dense canopy trees is above 3&#xa0;°C, proving the importance of both the geometry of the urban canyon and the existence of plants. Therefore, the prime contribution of this research is that it can provide quantitative information and guidance on how to target and design effective regeneration strategies in urban areas where overheating due to microclimatic conditions is more intense.</p>

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Urban geometry and sustainability: the effect of green interventions on the urban microclimate of Greek cities

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月2日

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  • Dimitra Tsirigoti

摘要

Overheating of public spaces, which is due to the overall temperature increase caused by the indisputable climate change, is a parameter affecting human health and quality of life in contemporary cities, while at the same time it can increase energy consumption of buildings, especially during the summer period where cooling energy demand raises significantly. This study investigates the way urban geometry can influence the microclimatic conditions of the Greek urban landscape. The mitigation measures, such as green interventions on buildings and open spaces are analyzed to define the most efficient way to improve the microclimate in urban neighborhoods. The methodology examines urban typologies, representative of the Greek urban tissue of the city of Thessaloniki to calculate, through simulations, the temperature differences, related to the UHI (Urban Heat Island) effect and to correlate them to the geometry of the urban space. Three H/W (height to width) ratios are analyzed under a base case scenario and a green scenario. Sparse and dense tree canopies are also examined to define the effect of leaf area density (LAD) to the potential air temperature. The results of the research prove that the microclimatic environment is strongly affected by the geometry of the urban canyons and by the presence of green areas. The maximum temperature difference calculated between the maximum potential air temperature of the 10 m street width without greening and the 8 m width street scenario with dense canopy trees is above 3 °C, proving the importance of both the geometry of the urban canyon and the existence of plants. Therefore, the prime contribution of this research is that it can provide quantitative information and guidance on how to target and design effective regeneration strategies in urban areas where overheating due to microclimatic conditions is more intense.