Abstract
In order to investigate the budget of sulfur oxides in continental areas of East Asia, the transport and wet deposition of sulfur oxides were calculated using an Eulerian transport model for several cases. The calculated wet depositions have been compared with the monthly averaged sulfur concentrations in precipitation observed at 69 locations widely covering China from July of 1992 through January of 1993 . Atmospheric concentration of sulfur dioxide along the east coast of the continent was also compared with the airborne observation carried out in May of 1993. Basing on these results, the budget of sulfur oxides in China was examined . The relationship among the outflow from the east coast to the sea areas and the seasonal variations of wet deposition distribution, and the pathways of atmospheric sulfur oxides in the continental areas. In winter, monthly amount of outflow from the east coast of China increased to about three times as large as that in summer . It was also found that the decreases in inland areas of northern China largely influenced the outflow from the east coast in winter.
