Impact of China＇s SO2 Emissions on SO2 Concentration and Sulfur Deposition in Japan

摘要

Based on the monitored data of references,EANET and the CMAQ( 4. 7. 1) model scenario simulations,the annual average concentration of SO2 in China in the recent 10 years and the contribution of China's SO2 emissions to SO2 concentration and sulfur deposition at various sites in Japan downwind were analyzed. The results showed that from 2001 to 2009 annual average concentration of SO2 was 0- 150 μg / m3 and showed a decreasing trend on the whole in China. The correlation coefficient of annual average concentration of SO2 at different sites in Japan and China's SO2 emissions was lower than that of annual average concentration and emission of SO2 in China's cities on the whole,showing that SO2 discharged in China had small impact on SO2 concentration in Japan. The contribution rate of China's SO2 emissions to annual average concentration of SO2 at various sites in Japan in 2010 was 7. 5%- 44. 0%,averaging 22. 6%; the annual average volume concentration of SO2 at different sites in Japan caused by China's SO2 emissions was 0- 0. 5 × 10- 9. The contribution rate of China's SO2 emissions to sulfur deposition at various sites in Japan in 2010 varied from 8. 0% to 41. 0%,averaging 22. 1%.