부산대학교 도서관

The ambient concentrations of individual VOC species were observed at five locations in Tokyo for two days in every season from autumn 2019 to summer 2020. The issues regarding air quality simulations and emission inventories were investigated by comparing the observed and simulated concentrations of the individual VOC species. Alkanes and ketones were the main contributors to the underestimated VOC concentrations found during all the seasons and all the locations. Underestimation of their hemispheric transport as well as domestic emissions were implied as the main factors because their reactivity in the atmosphere is low. When the reactivity in the atmosphere was considered, underestimation of the alkenes and overestimation of the aromatics were emphasized. The characteristics of the concentrations of individual species suggested underestimation of fugitive emissions from fuels and industrial solvents and overestimation of fugitive emissions from paint. The concentrations of biogenic VOC species were also largely underestimated, suggesting the importance of clarifying the biogenic VOC emissions and their seasonal variations in urban areas. Information about the concentrations about the individual VOC species are valuable to identify issues in air quality simulations and emission inventories as done in the present study.