www.atmos-chem-phys.net/9/4929/2009/ doi:10.5194/acp-9-4929-2009 © Author(s) 2009. This work is distributed under the Creative Commons Attribution 3.0 License. Biomass burning and urban air pollution over the Central Mexican Plateau 1Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA 2University of Colorado, Boulder, CO, USA 3Department of Chemistry, University of California at Irvine, Irvine, CA, USA 4National Center for Atmospheric Research, Boulder, CO, USA 5Department of Oceanography, University of Hawaii, USA 6Department of Chemistry, University of Montana, Missoula, MT, USA 7Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA 8Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, USA *now at: Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Switzerland **now at: AAAS Science and Technology Policy Fellow, United States Environmental Protection Agency, Washington, D.C., USA Abstract. Observations during the 2006 dry season of highly elevated concentrations of cyanides in the atmosphere above Mexico City (MC) and the surrounding plains demonstrate that biomass burning (BB) significantly impacted air quality in the region. We find that during the period of our measurements, fires contribute more than half of the organic aerosol mass and submicron aerosol scattering, and one third of the enhancement in benzene, reactive nitrogen, and carbon monoxide in the outflow from the plateau. The combination of biomass burning and anthropogenic emissions will affect ozone chemistry in the MC outflow. Final Revised Paper (PDF, 4719 KB) Supplement (2701 KB) Discussion Paper (ACPD) Special Issue Citation: Crounse, J. D., DeCarlo, P. F., Blake, D. R., Emmons, L. K., Campos, T. L., Apel, E. C., Clarke, A. D., Weinheimer, A. J., McCabe, D. C., Yokelson, R. J., Jimenez, J. L., and Wennberg, P. O.: Biomass burning and urban air pollution over the Central Mexican Plateau, Atmos. Chem. Phys., 9, 4929-4944, doi:10.5194/acp-9-4929-2009, 2009. Bibtex EndNote Reference Manager XML |