长江三角洲区域输送对上海市空气质量影响的特征分析

采用MM5/CMAQ模型模拟了2004年长江三角洲地区大气污染物的输送与扩散对上海地区空气质量的影响,并定量研究了外部源区域输送和本地源对上海市空气质量的贡献.结果表明,上海地区受本地源和外地源的影响程度及相互比例随着季节的变化存在很大差异;一次污染物SO2和二次污染物SO42-所受到的影响也呈现不同的特点.外部源区域输送对上海地区SO2浓度的贡献率为7%～17%,而对SO42-浓度的贡献率在60%～70%.贡献率垂直廓线分析表明,上海地区SO2外部源贡献率随高度存在着明显的变化,总体上随高度的增长呈非线性增长,而SO42-外部源贡献率随高度的变化不明显.

Impact of the transport of atmospheric pollutants from the Yangtze River Delta on the air quality in Shanghai

Impacts of the transport of atmospheric pollutants from Yangtze River Delta on the air quality of Shanghai in 2004 were simulated using MM5/CMAQ. Contributions of concentration from regional and local sources were qualified. The impacts on air quality of Shanghai from the local and regional sources were dependent on the different seasons. The impacts from the primary and secondary pollutants were also different. The contributions of SO2 in Shanghai from outside the city were 7%~17%, while those of SO42- ranged from 60%~70%. The contribution of SO2 in Shanghai from outside the city increased significantly with heights nonlinearly in general, while those of SO42- had no significant variations with heights.