Hecobian, A. and Liu, Z. and Hennigan, C. J. and Huey, L. G. and Jimenez, J. L. and Cubison, M. J. and Vay, S. and Diskin, G. S. and Sachse, G. W. and Wisthaler, A. and Mikoviny, T. and Weinheimer, A. J. and Liao, J. and Knapp, J. and Wennberg, P. O. and Kürten, A. and Crounse, J. D. and St. Clair, J. and Wang, Y. and Weber, R. J. (2011) Comparison of chemical characteristics of 495 biomass burning plumes intercepted by the NASA DC-8 aircraft during the ARCTAS/CARB-2008 field campaign. Atmospheric Chemistry and Physics, 11 (24). pp. 13325-13337. ISSN 1680-7316 http://resolver.caltech.edu/CaltechAUTHORS:20120321-084549058
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This paper compares measurements of gaseous and particulate emissions from a wide range of biomass-burning plumes intercepted by the NASA DC-8 research aircraft during the three phases of the ARCTAS-2008 experiment: ARCTAS-A, based out of Fairbanks, Alaska, USA (3 April to 19 April 2008); ARCTAS-B based out of Cold Lake, Alberta, Canada (29 June to 13 July 2008); and ARCTAS-CARB, based out of Palmdale, California, USA (18 June to 24 June 2008). Approximately 500 smoke plumes from biomass burning emissions that varied in age from minutes to days were segregated by fire source region and urban emission influences. The normalized excess mixing ratios (NEMR) of gaseous (carbon dioxide, acetonitrile, hydrogen cyanide, toluene, benzene, methane, oxides of nitrogen and ozone) and fine aerosol particulate components (nitrate, sulfate, ammonium, chloride, organic aerosols and water soluble organic carbon) of these plumes were compared. A detailed statistical analysis of the different plume categories for different gaseous and aerosol species is presented in this paper. The comparison of NEMR values showed that CH4 concentrations were higher in air-masses that were influenced by urban emissions. Fresh biomass burning plumes mixed with urban emissions showed a higher degree of oxidative processing in comparison with fresh biomass burning only plumes. This was evident in higher concentrations of inorganic aerosol components such as sulfate, nitrate and ammonium, but not reflected in the organic components. Lower NOx NEMRs combined with high sulfate, nitrate and ammonium NEMRs in aerosols of plumes subject to long-range transport, when comparing all plume categories, provided evidence of advanced processing of these plumes.
|Additional Information:||© 2011 Author(s). This work is distributed under the Creative Commons Attribution 3.0 License. Published by Copernicus Publications on behalf of the European Geosciences Union. Received: 6 June 2011. Published in Atmos. Chem. Phys. Discuss.: 30 June 2011. Revised: 10 November 2011. Accepted: 9 December 2011. Published: 22 December 2011. A. H. would like to thank the NASA DC-8 crew for their assistance in making WSOC measurements on the airplane. A. W. and T. M. acknowledge financial and logistical support from the Österreichische Forschungsörderungsgesellschaft, the Tiroler Zukunftsstifung, Armin Hansel and Tilmann D. Märk. MJC and JLJ were supported by NASA NNX08AD39G. This work was supported by the NASA Tropospheric Chemistry Program under grant number NNX08AH80G.|
|Official Citation:||Hecobian, A., Liu, Z., Hennigan, C. J., Huey, L. G., Jimenez, J. L., Cubison, M. J., Vay, S., Diskin, G. S., Sachse, G. W., Wisthaler, A., Mikoviny, T., Weinheimer, A. J., Liao, J., Knapp, D. J., Wennberg, P. O., Kürten, A., Crounse, J. D., Clair, J. St., Wang, Y., and Weber, R. J.: Comparison of chemical characteristics of 495 biomass burning plumes intercepted by the NASA DC-8 aircraft during the ARCTAS/CARB-2008 field campaign, Atmos. Chem. Phys., 11, 13325-13337, doi:10.5194/acp-11-13325-2011,|
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|Deposited By:||Ruth Sustaita|
|Deposited On:||21 Mar 2012 16:18|
|Last Modified:||26 Dec 2012 14:58|
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