Interactive comment on “ Assessing the formation and evolution mechanisms of severe haze pollution in Beijing − Tianjin − Hebei region by using process analysis ”

Abstract

This study investigated a haze event over BTH region in December 2015 with the process analysis method. The study examined the mechanisms underlying the event formation and evolution. They found the event was mainly controlled by the change of vertical mixing. In the end, the study also found that the vertical mixing and transport were two main processes that were responsible for the aerosol radiative feedback. The manuscript is well-written. However, the main point of processing analysis alone is not novel at all. Many previous studies have used this method in multiple air quality models, including WRF-Chem. The study only selected one event as the analysis case.