Predicting residential ozone deficits from nearby traffic
Predicting residential ozone deficits from nearby traffic
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DOI：
10.1016/j.scitotenv.2005.06.028
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发表时间：
2006-06-15
影响因子：
9.8
通讯作者：
Peters, John M.
中科院分区：
文献类型：
--
作者：
McConnell, Rob;Berhane, Kiros;Peters, John M.
已知新鲜交通废气中的氮氧化物会破坏环境臭氧。然而，对社区内车辆交通模式变化造成的臭氧局部变化的研究很少。在南加州儿童健康研究中，从3个社区的参与者样本中选出了78名儿童的家庭。1994年2月至11月期间，在一个家庭和一个社区中心监测站同时进行了两次24小时臭氧测量。住宅进行了地理编码，当地居民氮氧化物（NOx）以上的区域背景，由于附近的交通在每个参与者的家估计使用线源扩散模型。测量家庭臭氧下降，在可预测的方式模拟住宅氮氧化物增加。从住宅附近的当地交通模拟的氮氧化物占臭氧浓度的变化高达十亿分之十七。我们的结论是，住宅臭氧浓度可能被过度或低估的测量在社区监测，这取决于当地交通在社区的变化。这些发现可能对交通相关污染物对健康影响的研究有影响。(c)2005 Elsevier B.V保留所有权利。
Oxides of nitrogen in fresh traffic exhaust are known to scavenge ambient ozone. However, there has only been little study of local variation in ozone resulting from variation in vehicular traffic patterns within communities. Homes of 78 children were selected from a sample of participants in 3 communities in the southern California Children's Health Study. Twenty-four hour ozone measurements were made simultaneously at a home and at a community central site monitor on two occasions between February and November 1994. Homes were geo-coded, and local residential nitrogen oxides (NOx) above regional background due to nearby traffic at each participant's home were estimated using a line source dispersion model. Measured home ozone declined in a predictable manner as modeled residential NOx increased. NOx modeled from local traffic near homes accounted for variation in ozone concentrations of as much as 17 parts per billion. We conclude that residential ozone concentrations may be over- or underestimated by measurements at a community monitor, depending on the variation in local traffic in the community. These findings may have implications for studies of health effects of traffic-related pollutants. (c) 2005 Elsevier B.V All rights reserved.