Global comparison of VOC and CO observations in urban areas
Global comparison of VOC and CO observations in urban areas
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DOI：
10.1016/j.atmosenv.2010.09.010
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发表时间：
2010-12-01
影响因子：
5
通讯作者：
Plass-Duelmer, Christian
中科院分区：
文献类型：
--
作者：
von Schneidemesser, Erika;Monks, Paul S.;Plass-Duelmer, Christian
特定的挥发性有机化合物（VOC）和一氧化碳（CO）的测量从1998年到2008年在伦敦市中心的马里波恩路站点提出。长期趋势显示，所考虑的所有挥发性有机化合物的减少在统计上具有显著意义，每年减少3%至26%。在测量期间，一氧化碳以每年-12%的速度下降。与英格兰农村（Harwell）和偏远的高海拔地区（Hohenpeissenberg）的监测点相比，在伦敦路边观察到的VOC趋势显示出更大的下降速度，后者显示单个VOC的年下降幅度为-2%至-13%。从1998年到2008年，伦敦的挥发性有机化合物与一氧化碳的比率保持稳定，这表明减排措施对所测化合物的影响是相同的。Marylebone Road和Hohenpeissenberg之间VOC / CO比值的相对趋势比绝对趋势更相似，这表明城市地区的减排措施反映在区域背景位置上。对伦敦和其他全球城市的挥发性有机化合物混合比率和挥发性有机化合物与一氧化碳的比率进行了比较。在附件一国家，一氧化碳和挥发性有机化合物（C-5以上的烷烃、烯烃和芳烃）呈强相关性（>.8），而在非附件一国家，只有乙烯和乙烷与一氧化碳呈强相关性。相关性结果表明，在附件一国家，交通相关排放源的排放量很大，而在非附件一国家，工业和液化石油气相关排放源的影响要大得多。从2000年到2008年，伦敦每年的苯对乙烯比率在0.17到0.29之间，与美国城市和三个全球大城市之前的结果相比要好得多。(C) 2010 Elsevier Ltd.版权所有。
Speciated volatile organic compound (VOC) and carbon monoxide (CO) measurements from the Marylebone Road site in central London from 1998 through 2008 are presented. Long-term trends show statistically significant decreases for all the VOCs considered, ranging from -3% to -26% per year. Carbon monoxide decreased by -12% per year over the measurement period. The VOC trends observed at the kerbside site in London showed greater rates of decline relative to trends from monitoring sites in rural England (Harwell) and a remote high-altitude site (Hohenpeissenberg), which showed decreases for individual VOCs from -2% to -13% per year. Over the same 1998 through 2008 period VOC to CO ratios for London remained steady, an indication that emissions reduction measures affected the measured compounds equally. Relative trends comparing VOC to CO ratios between Marylebone Road and Hohenpeissenberg showed greater similarities than absolute trends, indicating that emissions reductions measures in urban areas are reflected by regional background locations. A comparison of VOC mixing ratios and VOC to CO ratios was undertaken for London and other global cities. Carbon monoxide and VOCs (alkanes greater than C-5, alkenes, and aromatics) were found to be strongly correlated (>0.8) in the Annex I countries, whereas only ethene and ethyne were strongly correlated with CO in the non-Annex I countries. The correlation results indicate significant emissions from traffic-related sources in Annex I countries, and a much larger influence of other sources, such as industry and LPG-related sources in non-Annex I countries. Yearly benzene to ethyne ratios for London from 2000 to 2008 ranged from 0.17 to 0.29 and compared well with previous results from US cities and three global megacities. (C) 2010 Elsevier Ltd. All rights reserved.