The Thermal Impact of Various Pavement Materials on Outdoor Temperature in a Temperate Four-Season Climate: A Case Study of Arak City, Iran

Urban heat and oasis effects significantly alter urban microclimates due to anthropogenic heat emissions and the thermal properties of urban surfaces. This study aims to quantitatively assess the thermal effects of different pavement types on outdoor temperatures across seasonal extremes in a temperate four-season climate. Conducted in Arak city, Iran, on 22 July and 22 January 2023, this research investigates both warm and cold seasons to provide a comprehensive understanding of pavement influence on urban microclimates throughout the year. Using the ENVI-met 5.0.3 modeling software, an environmental meteorology tool for simulating urban microclimates, the thermal performance of commonly used asphalt pavement was compared with alternative materials such as basalt and light-colored concrete on Dr. Hesabi Street. Simulation results reveal that basalt and light-colored concrete pavements reduce summer cooling loads by up to 3.49 degrees Celsius (°C), enhancing pedestrian thermal comfort, but simultaneously increase winter heating demands by 1.04 °C. This balance presents an optimal scenario to minimize adverse climate effects across seasons. The findings offer valuable insights for sustainable urban planning, promoting resilient city design strategies that mitigate heat and oasis effects in diverse climates. This study contributes actionable recommendations for urban planners seeking to balance thermal performance in temperate climates with seasonal variability.