Men Xia

TL;DR: In this paper, four recently reported HONO sources were added to the Community Multiscale Air Quality (CMAQ) model, including RH-dependent (relative humidity) and light-enhancing effects on heterogeneous reactions, photolysis of particulate nitrate in the atmosphere, and photolyisation of HNO3 and Nitrate on surfaces.

TL;DR: In this paper, the role of dinitrogen pentoxide (N2O5 ) in the formation of nitrate was investigated in the Pearl River Delta (PRD) of southern China during hazy days in 2017.

TL;DR: The widespread sources of chloride, together with abundant NOx and ozone, suggest significant ClNO2 production and subsequent enhanced photochemical processes over China.

TL;DR: The spatial distributions of vehicle emissions show a high order of heterogeneity, indicating that local conditions should be considered in policy formulation in addition to national consistency, and more comprehensive policies should be implemented to mitigate the vehicle pollution in middle-sized cities.

TL;DR: The observation of unprecedented levels of bromine chloride (BrCl) at a mid-latitude site in North China during winter reveals the significant role of reactive halogen in winter atmospheric chemistry and the deterioration of air quality in continental regions where uncontrolled coal combustion is prevalent.