近周边电厂源对北京市采暖期间SO2的贡献分析

应用中尺度气象模式(MM5)与区域多尺度空气质量模型(CAMx)的耦合模型系统，模拟研究了2005年采暖期间近北京地区电厂源排放对北京市空气质量的影响；采用SO₂贡献来源识别技术筛选了对北京市空气质量影响大的区域电厂源. 结果表明:近北京地区电厂源对北京市ρ(SO₂)的影响从南到北呈递减趋势，其对北京城区、北京全市ρ(SO₂)月均贡献值分别为6.97和6.40 μg/m3；影响北京城区ρ(SO₂)的电厂排放源主要来自张家口、唐山、天津、石家庄、廊坊和衡水等地区，占ρ(SO₂) 总贡献值的83.2%；为缓解北京采暖期间SO₂污染压力，应首先控制和削减张家口、天津、唐山、石家庄地区SO₂排放量大的电厂源. 

Beijing SO2 Source Apportionment from Regional Power Plants During Heating Season

An integrated MM5-CAMx modeling system was applied to study the effects of regional power plant emissions on the SO₂ air quality in Beijing during theheating season. The SO₂ source apportionment technology was used to investigate the influence of these regions on air quality in Beijing. Results indicated that SO₂ concentration in Beijing decreased from south to north,and the monthly concentrations were 6.97 and 6.40 μg/m3 for the urbanonly andentire area of Beijing, respectively. The SO₂ source apportionment study showedthat regional power plant emissions from Zhangjiakou, Tangshan, Tianjin, Shijiazhuang, Langfang and Hengshui account for 83.2% of the SO₂ contribution in urbanBeijing. Comprehensive analysis indicated that for the purpose of mitigating air pollution and improving air quality in Beijing, it is critical to control and reduce power plant emissions in Zhangjiakou, Tianjin, Tangshan and Shijiazhuang,which had greater emission amounts and higher contributions.