Influence of photochemical loss of volatile organic compounds on understanding ozone formation mechanism

Abstract. Volatile organic compounds (VOCs) tend to be consumed by atmospheric oxidants, resulting in substantial photochemical loss during transport. An observation-based model was used evaluate the influence of VOCs on sensitivity regime and mechanisms ozone formation. Our results showed that a VOC-limited based observed VOC concentrations shifted transition with initial concentration (PIC-VOCs) morning. The net formation rate underestimated 3 ppb h?1 (?36 d?1) measured when compared PIC-VOCs. relative contribution RO2 path production PIC-VOCs accordingly increased 13.4 %; particular, alkene-derived approximately 10.2 %. In addition, OH–HO2 radical cycle obviously accelerated highly reactive alkenes after accounting for VOCs. local photochemistry might both regional pollution if are not accounted for, policymaking prevention should focus high reactivity.