摘要
The spatial distdbution and deposition of PM2.5 in coastal areas of eastern China in 2010 were simulated using the CMAQ model. The results show that the simulated data were consistent with the observed data, and the model could simulate the regional distribution of PM2.5 concentration. There were obvious seasonal variations in PM2.5 concentration in eastern China, and the spatial distribution of PM2.5 concentration which increased from the edge to the center of a city coincided well with that of the sources. In North China, the high-value center of PM2.5 concentration reached above 120 μg/m3. Wet deposition was the main way to remove PM2.5 , and wet deposition flux of PM2.5 was at least five times more than that of the dry deposition flux. Deposition flux of PM2.5 was the largest in summer, while it was the smallest in winter. The high-value center of deposition flux of PM2.5 in eastern China exceeded 30 mg/（ m2 · d）. Wet deposition of PM2s in each province or region accounted for more than 91% of total deposition of PM2.5. Total deposition of PM2.5 in all simulated regions amounted to 4.67 ×10^6 /a, and total deposition of PM2.5 in Beijing, Tianjin and Hebei was up to 1.65 ×10^6 t/a.
The spatial distdbution and deposition of PM2.5 in coastal areas of eastern China in 2010 were simulated using the CMAQ model. The results show that the simulated data were consistent with the observed data, and the model could simulate the regional distribution of PM2.5 concentration. There were obvious seasonal variations in PM2.5 concentration in eastern China, and the spatial distribution of PM2.5 concentration which increased from the edge to the center of a city coincided well with that of the sources. In North China, the high-value center of PM2.5 concentration reached above 120 μg/m3. Wet deposition was the main way to remove PM2.5 , and wet deposition flux of PM2.5 was at least five times more than that of the dry deposition flux. Deposition flux of PM2.5 was the largest in summer, while it was the smallest in winter. The high-value center of deposition flux of PM2.5 in eastern China exceeded 30 mg/（ m2 · d）. Wet deposition of PM2s in each province or region accounted for more than 91% of total deposition of PM2.5. Total deposition of PM2.5 in all simulated regions amounted to 4.67 ×10^6 /a, and total deposition of PM2.5 in Beijing, Tianjin and Hebei was up to 1.65 ×10^6 t/a.
基金
Supported by the National Natural Science Foundation of China(41373131)
National Key Technology R&D Program(2014BA C23B03)
