OH(v)+O3: Does chemical reaction dominate over non-reactive quenching?

We discuss the title atmospheric reaction for vibrational excited states of OH over the range 0⩽v⩽9. All calculations have employed the quasi-classical trajectory (QCT) method and a realistic double many-body expansion (DMBE) potential energy surface for HO4 (2A). For v=9, the calculated thermal rate coefficient is found to agree with measurements of OH quenching reported by others, which has been attributed to both chemical reaction and non-reactive collisions. The temperature dependence of the rate constant is described by a simple model for all studied vibrational states of OH.