Contribution of Local and Transboundary Air Pollution to the Urban Air Quality of Fukuoka, Japan

Transboundary air pollution (TAP) and local (LAP) influence the quality of urban areas. Fukuoka, located on west side Japan affected by TAP from Asian continent, is a unique example for understanding contribution LAP TAP. Gaseous species particulate matter (PM) were measured approximately three weeks in Fukuoka winter 2018. We classified two distinctive periods, TAP, based wind speed. The classification was supported variations concentration gaseous backward trajectories. Most pollutants, including NOx PM, high period low period. However, ozone exception. Therefore, our findings suggest that reducing emissions necessary. Ozone higher period, variation relatively small, indicating produced outside city transported to Fukuoka. Thus, pollutants must also be reduced at regional scale, China.