Spatial distribution of the source-receptor relationship of sulfur in Northeast Asia M. Kajino1,*, H. Ueda2, K. Sato3, and T. Sakurai4 1Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan 2Dept. of Environ. and Life Engineering, Toyohashi Institute of Technology, Toyohashi, Japan 3Asia Center for Air Pollution Research, Niigata, Japan 4Japan NUS Co. LTD, Tokyo, Japan *now at: Meteorological Research Institute, Japan Meteorological Agency, Tsukuba, Japan
Abstract. The spatial distribution of the source-receptor relationship (SRR) of
sulfur over Northeast Asia was examined using a chemical transport model
(RAQM) off-line coupled with a meteorological model (MM5). The simulation
was conducted for the entire year of 2002. The results were evaluated using
monitoring data for six remote stations of the Acid Deposition Monitoring
Network in East Asia (EANET). The modeled SO2 and O3
concentrations agreed well with the observations quantitatively. The modeled
aerosol and wet deposition fluxes of SO42− were underestimated by
30 % and 50 %, respectively. The domain was divided into 5
source-receptor regions: (I) North China; (II) Central China; (III) South
China; (IV) South Korea; and (V) Japan. The sulfur deposition in each receptor
region amounted to about 50–75 % of the emissions from the same region.
The largest contribution to the deposition in each region was originated
from the same region, accounting for 53–84 %. The second largest
contribution was due to Region II, supplying 14–43 %. The spatial
distributions of the SRRs revealed that subregional values varied by about
two times more than regional averages due to nonuniformity across the
deposition fields. Examining the spatial distributions of the deposition
fields was important for identifying subregional areas where the deposition
was highest within a receptor region. The horizontal distribution changed
substantially according to season.
Citation: Kajino, M., Ueda, H., Sato, K., and Sakurai, T.: Spatial distribution of the source-receptor relationship of sulfur in Northeast Asia, Atmos. Chem. Phys., 11, 6475-6491, doi:10.5194/acp-11-6475-2011, 2011.