长江中下游地区空气质量的数值模拟研究

根据2002年在ACE-Asia和TRACE-P试验中获得的亚洲区域的污染源排放资料,利用美国EPA最新发展的空气质量模式Models-3,分别模拟研究生物源和人为源排放于2002年7月2日08时至7月3日07时在长江中下游地区引起的O3、SO2、CO以及NOx浓度的变化规律和特征.结果显示,模式对污染物具有很好的模拟能力,无论是污染物浓度的日变化还是PBL层内垂直分布情况,都与已有结论和观测结果一致.

Numerical simulation for air quality in middle and lower reaches of Yangtse River

Based on the pollution source data of the Asian area provided by the ACE-Asia and TRACE-P Experiments in 2002 and by means of the air quality model Models-3 that has been recently developed by EPA, this paper has simulated the changing regulations and characteristics of ozone concentration, sulfur dioxide, carbon monoxide and the total amount of nitrogen monoxide and nitrogen dioxide in the middle and lower reaches along Yangtse River for 24 hours around respectively by using the biomass burning area sources and anthropogenic area sources. The above simulations without precipitation show that: (1) The ozone concentration at the boundary layers varies remarkably fro dm day to day in the three cases, thus indicating that ozone production has close relation to the sunlight. In the boundary layer, the concentration of ozone increases with the height above the earth; (2) In the ground surface level, the concentration of sulfur dioxide, carbon monoxide and the total amount of nitrogen monoxide and nitrogen dioxide varies almost regularly daily. In the boundary layer, the concentration of these three contaminations decreases with height. The concentration decrease of the three contaminants has resulted mainly from the anthropogenic area sources. The simulation results also show that Models-3 can simulate contaminations more satisfactorily. However, both the daily average variation and vertical distribution in PBL of concentration are consistent with the former observation results.