Numerical Simulation of Distribution and Deposition of PM2.5 in Eastern China in 2010

• 作者: Cheng Nianliang Feng Yu Wang Xiao
• 来源期刊: 气象与环境研究：英文版
• 学科: 地球科学
• 关键词: 颗粒物浓度 中国东部 数值模拟 沉积分布 肺 东部沿海地区 空间分布 沉积通量
• 年，卷（期）: 2015,（7）
• 页码范围: 46-51
• 页数: 6页
• 分类号: X831.01

摘要

The spatial distribution 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 PM2. 5 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 × 106 t/a,and total deposition of PM2. 5 in Beijing,Tianjin and Hebei was up to 1. 65 × 106 t/a.