抄録
To assess impact of emission from Sakurajima volcano on acid deposition in Japan, we performed trajectory analysis and Eulerian model simulations.The trajectories of plumes leaving from Sakurajima show a frequent transport over Japan islands during spring and autumn.Periodic passage of low pressure system is responsible for the transport.In addition, 40% of these trajectories pass over wet regions where pollutants in a plume are subject to wet removal by precipitation.The results from model simulations indicate that during spring sulfur dioxide emitted from Sakurajima volcano accounts for over 20% of the total sulfur deposition amount in western Japan.These results suggest that emission from Sakurajima volcano can play an important role in the acid deposition in Japan during spring and autumn.
