Does Light Pollution Affect Nighttime Ground-Level Ozone Concentrations?

Ground-level ozone (O3) is mainly produced during daytime in the presence of ultraviolet (UV) light and later destroyed by nitrogen oxides nighttime. However, pollution caused excessive use artificial lights may disrupt chemistry night-time ground-level O3 providing enough energy to initiate nighttime production. In this study, (7 p.m. 7 a.m.) O3, oxide (NO), dioxides (NO2) concentrations were observed for three years (2013, 2014, 2015). The existence was found nighttime, especially urban areas with a concentration range 8–20 ppb. results suggested that variations higher than suburban areas. mean at sites varied, possibly because distribution anthropogenic around brighter locations, as indicated data from light-pollution map. This has not suspected photolysis processes, which directly slowed oxidation. photochemistry rate JNO2/k3 supposed be near zero absence photochemical reactions night. minimum all ranged 2–3 ppb, indicating might also form night, albeit due pollution.