Characterization of volatile organic compounds (VOCs) in Asian and north American pollution plumes during INTEX-B: identification of specific Chinese air mass tracers
| العنوان: | Characterization of volatile organic compounds (VOCs) in Asian and north American pollution plumes during INTEX-B: identification of specific Chinese air mass tracers |
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| المؤلفون: | B. Barletta, S. Meinardi, I. J. Simpson, E. L. Atlas, A. J. Beyersdorf, A. K. Baker, N. J. Blake, M. Yang, J. R. Midyett, B. J. Novak, R. J. McKeachie, H. E. Fuelberg, G. W. Sachse, M. A. Avery, T. Campos, A. J. Weinheimer, F. Sherwood Rowland, D. R. Blake |
| المصدر: | Atmospheric Chemistry and Physics, Vol 9, Iss 14, Pp 5371-5388 (2009) Scopus-Elsevier Barletta, B.; Meinardi, S.; Simpson, I. J; Atlas, E. L; Beyersdorf, A. J; Baker, A. K; et al.(2009). Characterization of volatile organic compounds (VOCs) in Asian and north American pollution plumes during INTEX-B: identification of specific Chinese air mass tracers. Atmospheric Chemistry and Physics, 9(14), 5371-5388. doi: 10.5194/acp-9-5371-2009. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/1db049hz |
| بيانات النشر: | Copernicus Publications, 2009. |
| سنة النشر: | 2009 |
| مصطلحات موضوعية: | tropospheric ozone, emissions, hydrocarbon ratios, fast-response, lcsh:QC1-999, lcsh:Chemistry, pem-west, lcsh:QD1-999, pacific, transport, Physical Sciences and Mathematics, global sources, dimethyl sulfide, carbonyl sulfide, lcsh:Physics |
| الوصف: | We present results from the Intercontinental Chemical Transport Experiment – Phase B (INTEX-B) aircraft mission conducted in spring 2006. By analyzing the mixing ratios of volatile organic compounds (VOCs) measured during the second part of the field campaign, together with kinematic back trajectories, we were able to identify five plumes originating from China, four plumes from other Asian regions, and three plumes from the United States. To identify specific tracers for the different air masses we characterized their VOC composition and we compared their background levels with those obtained during the 2004 INTEX-A mission. The Chinese and other Asian air masses were significantly enhanced in carbonyl sulfide (OCS) and methyl chloride (CH3Cl), while all CFC replacement compounds were elevated in US plumes, particularly HFC-134a. Although elevated mixing ratios of Halon-1211 were measured in some Chinese plume samples, several measurements at background levels were also observed. After analyzing the VOC distribution and correlations within the Chinese pollution plumes and applying principal component analysis (PCA), we suggest the use of a suite of species, rather than a single gas, as specific tracers of Chinese air masses (namely OCS, CH3Cl, 1,2-dichloroethane, ethyl chloride, and Halon-1211). In an era of constantly changing halocarbon usage patterns, this suite of gases best reflects new emission characteristics from China. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 1680-7324 1680-7316 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb29e1bd732baec2546e65d3f6717652 http://www.atmos-chem-phys.net/9/5371/2009/acp-9-5371-2009.pdf |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....bb29e1bd732baec2546e65d3f6717652 |
| قاعدة البيانات: | OpenAIRE |
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