京津地区大气中非甲烷烃(NMHCs)质量浓度水平和反应活性研究  

Ambient Mass Concentration and Reactivity of Non-Methane Hydrocarbons (NMHCs) in Beijing and Tianjin Cities

作　　者：张俊刚[1] 王跃思[1] 王珊[2] 吴方堃[2] 毛婷[1] 

机构地区：[1]中国科学院大气物理研究所,北京100029 [2]兰州大学资源环境学院,甘肃兰州730000

出　　处：《环境科学研究》2008年第5期158-162,共5页Research of Environmental Sciences

基　　金：国家高技术研究发展计划(863)项目(2006AA06A301);国家自然科学基金项目(40525016);国家重点基础研究发展计划(973)项目(2007CB407303)

摘　　要：2006年8月15日—9月15日同时在北京和天津对大气中的非甲烷烃(NMHCs)进行了同步观测,利用最大增量反应活性(MIR)计算了两地NMHCs的臭氧生成潜势以估计其对臭氧生成的影响.结果表明,北京大气中ρ(NMHCs)平均值比天津高78.0μg/m3.用上午的ρ(NMHCs)计算了京津地区臭氧生成潜势,分别为1 470和814μg/m3,其中苯系物对臭氧生成的影响最大,分别占总臭氧生成潜势的75%和73%,其次是烯烃(占13%和11%)和烷烃(占12%和16%).比较两地ρ(NMHCs)和NMHCs的反应活性可知,北京地区大气中NMHCs的组成比天津的稳定,且其反应活性强于天津.结合臭氧浓度发现,北京地区大气的氧化能力比天津强.Simultaneous measurements of non-methane hydrocarbons （NMHCs） in the ambient atmosphere in Beijing and Tianjin cities were performed from August 15 to September 15, 2006. The maximum increment reactivity （MIR） was used to evaluate the ozone production potential of NMHCs. The average p（NMHCs） in Beijing City was 78.0 μg/m^3 higher than that in Tianjin City. The ozone production potential of NMHCs was calculated by ρ（NMHCs） in the morning, at 1 470μg/m^3 O3 in Beijing City and 814 μg/m^3 O3 in Tianjin City, respectively. Aromatics have most contributions to the ozone production, accounting for 75 % and 73 % respectively in Beijing and Tianjin cities, followed by alkenes （ 13 % and 11% ） and alkanes （ 12 % and 16 % ）. Comparing the mass concentration and reactivity of NMHCs in the two cities, it was indicated that the composition of NMHCs in Beijing City was more stable than in Tianjin City. Combined with the ozone concentration, it was found that the atmosphere oxidation ability was stronger in Beijing City than in Tianiin City.

关 键 词：非甲烷烃 最大增量反应活性 臭氧生成潜势 北京 天津 

分 类 号：X515[环境科学与工程—环境工程]