Presentation Information
[AAS08-P29]Sensitivities of soil resistances to the modelled tropospheric ozone: validation with the drone vertical profile at the western coast of Japan
*Syuichi Itahashi1, Mao Xu1 (1.Kyushu University, Research Institute for Applied Mechanics)
Keywords:
O3,Drone,Air quality modeling,Soil resistances
Tropospheric ozone (O3) is produced via photochemical reactions, including nitrogen oxides (NOx) and volatile organic compounds (VOCs). Compared to the air quality improvements in the U.S. and Europe, Asia has been facing a severe O3pollution issue. In support of emission mitigation strategies, air quality modeling can provide insight through sensitivity analyses of various factors. In this sense, the accuracy of air quality modeling in capturing observations is an important aspect. However, the current air quality modeling has some difficulties, particularly the modeling overestimation issue on O3 concentration. In our previous study, the vertical O3 profile (from the surface to 1000 m) was measured by a drone at Fukue Island, Nagasaki Prefecture, located in the western coast of Japan in October 2023. Based on the validation of air quality modeling with drone measurement, it was clarified that the model can capture the O3 vertical profile well, whereas it overestimates a lower O3 concentration close to the surface in the morning time. Because local emissions on this island were low, the O3 loss process via NO titration was ineffective. Thus, we revisit the O3 dry deposition process, and focus on the soil resistances which were differently configured in the various modeling approaches. In this study, we conducted several sensitivity experiments on both in-canopy turbulence and ground resistance within the soil-resistance component.The performances of air quality modeling in sensitivity experiments at the surface level and vertical profile are discussed in this conference.