Mobile monitoring of air pollutant concentration in the park of Urumqi, China

Abstract

The concentrations of PM_2.5, PM₁₀, O₃ and NO₂ in Urumqi People's Park were monitored by mobile monitoring in July and October 2023, and the temporal and spatial changes of pollutant concentrations in urban parks and their influencing factors were analyzed. The results show that park can effectively reduce PM and NO₂ concentration, increase O₃ concentration. PM concentration in the park was higher in the morning than the noon. O₃ and NO₂ concentration is lower in the morning than the noon. The concentration within the park was lower than that outside the park. The mitigative effect of pollutants in the park was better in summer than in autumn. The concentration of PM in the park showed a high value aggregation, and PM_2.5 and PM₁₀ showed the same spatial distribution in the high value cluster, and the pollution of both showed homology in summer. O₃ and NO₂ concentrations tend to accumulate at low value cluster. Pollutants are affected by the local environment. PM_2.5 concentration is greatly affected by wind speed and distance from water, O₃ concentration is greatly affected by temperature and average distance from road. The closer to the road, the higher the concentration of NO₂. Attention should be paid to the landscape design of the buffer zone of 30–50 m with the high pollution area. This study can provide reference for park planning and design.