[A-AS07] Atmospheric Chemistry

[AAS07-17] A numerical study of the lightning-induced nitrogen oxides by using a meteorological model coupled with a bulk lightning model and an offline chemical transport model, Part II : Suggestion from the simulation

*Yousuke Sato^1,2, Mizuo Kajino³, Syugo Hayashi³, Ryuichi Wada⁴ (1.Faculty of Science, Hokkaido University, 2.RIKEN Center for Computational Science, 3.Meteorological Research Institute, 4.Department of Natural and Environmental Science, Teikyo University of Science)

Keywords:Lightning NOx, Bulk Lightning Model, Chemical Transport Model

This study investigated the impacts of lightning-induced nitrogen (LNO_x) on nitrogen monoxide (NO), nitrogen dioxide (NO₂), total reactive nitrogen (NO_y), and NO_x oxidation product observed at the top of Mt. Fuji, on August 22, 2017 (Wada et al., 2019). The meteorological model (Nishizawa et al., 2015; Sato et al., 2015) coupled with an explicit bulk lightning model (Sato et al., 2019, 2022a) and a chemical transport model (Kajino et al., 2019), which introduced by Sato et al. (2022b), enabled us to investigate the impacts. The simulation by the model elucidated that the NO_y measured at the top of Mt. Fuji were emitted below 6 km around Wakasa Bay as LNO_x. A comparison of the simulated NO_x and measured NO_x at Mt. Fuji indicated that the reaction rates of the NO and NO2 cycles were well reproduced in our model. Our simulation also suggests that the simultaneous observation of NO_y and NO_x is important for understanding the emission of LNO_x and subsequent atmospheric chemical reactions and validating chemical transport models.

Reference
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