Abstract
In this study, we confirm the reproducibility of an air quality model by comparison with observations and discuss the improvement of the reproducibility of photochemical oxidant (Ox) concentrations. We also calculate the sensitivity of each emission source to Ox. The improvement of the underestimation of NOx and NMHC is appropriate for Ox and the emission increases, the reaction model improves and the spatial resolution improves. In the case of Ox, since it has a negative source sensitivity, it is necessary to apply it to a limited range such as application to the daily-maximum concentration of Ox. Only when the concentration of photochemical Ox was high, the source sensitivity to photochemical Ox was calculated and it was found that all sources had almost the same source sensitivity.
