Aerosol and Air Quality Research, Journal Year: 2025, Volume and Issue: 25(5)

Published: April 23, 2025

Abstract Background Urban heat island (UHI), where built areas are warmer compared to non-urban regions, increases human related diseases and mortality. A key challenge in UHI analysis is the designation of sites as urban or suburban/rural; however, growing complexity green spaces predominance transportation sector nonurban creates a dilemma for distinct delineation. Objectives This study aims utilize variability atmospheric components such particulate matter (PM), inorganic gases, volatile organic compounds (VOCs) direct tracers degree urbanization ground-based measurements fully comprehend convoluted regions with indistinct delineation environments. Methods Atmospheric gases aerosols were used analysis. Inorganic monitored two southeastern US city varying degrees urbanization. VOCs analyzed using proton transfer reaction time-of-flight mass spectrometer. Results The more-urbanized site exhibited night conditions elevated total oxidant levels, leading formation nanometer-sized particles. Machine learning revealed similar pollutant profiles both sites, suggesting comparable sources variability. Biogenic enhanced at less-urbanized site; levels anthropogenic aromatic sites. comprehensive spectra molecular backbones per that further affirmed applicability indicators Conclusion This concludes provide more accurate information than typical PM parameters characterizing Further exploration can enhance our understanding dynamics its interaction vegetation spaces. Graphical

Language: Английский