The central Japan has characteristic topographical features such as highmountains and large plains, and is bounded with complex coast lines of the Pacific Ocean and the Sea of Japan. Thus various types of local flows develop in summer season. It is known that in the daytime, pollutants emitted over the huge coastal-urban areas in the plains such as Tokyo and Nagoya often reach to the central mountainous area within a day, with producing ozone and other products. However, the subsequent behavior and fate of the ozone and others are not clear. In this study, 3D three-days-simulations, during 26-28 July, 1995, of transport/chemistry/deposition of various chemical species were performed to see the behavior of ozone produced in the pollutant rich air mass, which passed over the urban area, particularly Nagoya in the Nohbi Plain, using the calculation domain over the Central Japan. The results were compared with airborne-observation and discussed.
