An assessment of nitrogen dioxide (NO[subscript 2]) and ozone (O[subscript 3]) distribution in Edmonton, Canada employing remote sensing data (2018 – 2023)

Abstract

<p><span>This study analyzes the temporal and spatial distribution of satellite-observed NO₂ and O₃ concentrations in Edmonton, Canada, from July 2018 to June 2023. It explores the relationship of NO₂ and O₃ concentrations with elevation, temperature, road density, and population density. Results show higher NO₂ concentrations during winter and lower in fall months; however, O₃ concentrations remain relatively stable compared to NO₂ during the study period. NO₂ concentrations are highest in central Edmonton and lowest in surrounding suburban regions, while O₃ shows higher concentrations in central and western Edmonton and lower in eastern and southern suburban areas. Higher NO₂ concentrations are found on Wednesdays and lower on Sundays while O₃ remains consistent throughout the week. The research methodology adopted in this study may help the scientific community understand the complex interactions between anthropogenic activities and air pollution. Furthermore, the findings may help guide urban planners and policy makers in prioritizing air pollution control in the hotspot areas identified in the study.</span></p>