Radiative Effects of Particular Matters on Ozone Pollution in Six North China Cities

Abstract

North China Plain (NCP) region has experienced severe and chronic air pollution in the last two decades as China industrializes with much increased anthropogenic activities. The primary air pollutants in the region have been airborne particular matters (PM) with aerodynamic diameters less than 2.5 μm (PM 2.5 ) and 10 μm (PM 10 ). China has mounted a vigorous campaign to mitigate the air pollution since year 2013 by setting up reduction targets for PM 2.5 in various regions. By managing coal consumption more efficiently, the levels of SO 2 have been significantly reduced, which led to reduction in PM 2.5 and PM 10 , as reported in Chen et al. (2018) andLiu et al. (2019). The latter works found a general decline of SO 2 (61.6%), PM 10 (13.9%) and PM 2.5 (19.5%) from 2014 to 2018 in 45 prefecture level cities in North China.

Ambient fine particulate matter and ozone pollution in China: synergy in anthropogenic emissions and atmospheric processes

“…Zhu et al (2021a) proved aerosol radiative effects contributed to a 7.8% ozone rise over the NCP during COVID-19. However, Li et al (2019b), Wang (2020b), andLi et al (2021f) all showed that the influence of aerosol radiative effects on ozone was weak, generally less than 1 ppb MDA8 O 3 from 2013 to 2017 across China. The varied mechanism of aerosol radiative effects in different methods and models was an important reason for the difference between studies, which should be set more carefully and accurately.…”