[Concentration Characteristics and Assessment of Model-Predicted Results of PM_2.5 in the Beijing-Tianjin-Hebei Region in Autumn and Winter].

Abstract

concentration showed a close relationship. The models performed well in forecasting Zhangjiakou, Chengde, and Qinhuangdao, but by contrast overestimated in Tangshan, Shijiazhuang, Baoding, Beijing, and Tianjin. The uncertainty of emission sources, measured and predicted meteorological data, and the atmospheric chemical reaction mechanism may be the main reasons for the overestimate.