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Characterizing Ozone Production in the Mexico City Metropolitan Area: a Case Study Using a Chemical Transport Model : Volume 7, Issue 5 (27/02/2007)

By Lei, W.

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Book Id: WPLBN0003994715
Format Type: PDF Article :
File Size: Pages 20
Reproduction Date: 2015

Title: Characterizing Ozone Production in the Mexico City Metropolitan Area: a Case Study Using a Chemical Transport Model : Volume 7, Issue 5 (27/02/2007)  
Author: Lei, W.
Volume: Vol. 7, Issue 5
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2007
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Volkamer, R., Foy, B. D., Zavala, M., Lei, W., & Molina, L. T. (2007). Characterizing Ozone Production in the Mexico City Metropolitan Area: a Case Study Using a Chemical Transport Model : Volume 7, Issue 5 (27/02/2007). Retrieved from http://www.ebooklibrary.org/


Description
Description: Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, MA, USA. An episodic simulation is conducted to characterize midday (12:00–17:00 CDT) ozone (O3) photochemical production and to investigate its sensitivity to emission changes of ozone precursors in the Mexico City Metropolitan Area (MCMA) during an O3-South meteorological episode using the Comprehensive Air Quality Model with extensions (CAMx). High Ox (O3+NO2) photochemical production rates of 10–80 ppb/h are predicted due to the high reactivity of volatile organic compounds (VOCs) in which alkanes, alkenes, and aromatics exert comparable contributions. The predicted ozone production efficiency is between 4–10 O3 molecules per NOx molecule oxidized, and increases with VOC-to-NO2 reactivity ratio. Process apportionment analyses indicate significant outflow of pollutants such as O3 and peroxyacetyl nitrate (PAN) from the urban area to the surrounding regional environment. PAN is not in chemical-thermal equilibrium during the photochemically active periods. Sensitivity studies of O3 production suggest that O3 formation in the MCMA urban region with less chemical aging (NOz/NOy<0.3) is VOC-limited. Both the simulated behavior of O3 production and its sensitivities to precursors suggest that midday O3 formation during this episode is VOC-sensitive in the urban region on the basis of the current emissions inventory estimates, and current NOx levels depress the O3 production.

Summary
Characterizing ozone production in the Mexico City Metropolitan Area: a case study using a chemical transport model

Excerpt
Arriaga-Colina, J. L., West, J. J., Sosa, G., Escalona, S. S., Ord\'uÑez, R. M., and Cervantes, A. D. M.: Measurements of VOCs in Mexico City (1992–2001) and evaluation of VOCs and CO in the emissions inventory, Atmos. Environ., 38, 2523–2533, 2004.; CAM (Comisión Ambiental Metropolitana): Inventario de Emisiones 2002 de la Zona Metropolitana del Valle de México, México, 2004.; Baumgardner, D., Raga, G. B., Kok, G., Ogren, J., Rosas, I., Báez, A., and Novakov, T.: On the evolution of aerosol properties at a mountain site above Mexico City, J. Geophys. Res., 105, 22 243–22 254, 2000.; Carter, W. P. L.: Development of ozone reactivity scales for volatile organic compounds, J. Air Waste Manage. Assoc., 44, 881–899, 1994.; Carter, W. P. L.: Documentation of the SAPRC-99 chemical mechanism for VOC reactivity, final report to California Air Resources Board, Contract 92-329 and 95-308, Calif. Air Res. Board, Sacramento, Calif., 2000.; Carter, W. P. L.: Environmental chamber studies of ozone formation potentials of volatile organic compounds, Proceedings of the NATO Advanced Research Workshop Environmental Simulation Chambers: Application to Atmospheric Chemical Processes, edited by: Rudzinski, K. and Barnes, I., NATO Sciences Series, IV. Earth and Environmental Sciences, Zakopane, Poland, Kluwer Academic Publishers, 1–4 October 2004.; Castro, T., Madronich, S., Rivale, S., Muhlia, A., and Mar, B.: The influence of aerosols on photochemical smog in Mexico City, Atmos. Environ., 35, 1765–1772, 2001.; Chameides, W. L., Lindsay, R.W., Richardson, J., and Kiang, C. S.: The role of biogenic hydrocarbons in urban photochemical smog – Atlanta as a case-study, Science, 241, 1473–1475, 1988.; Chameides, W. L., Fehsenfeld, F., Rodgers, M. O., et al.: Ozone precursor relationships in the ambient atmosphere, J. Geophys. Res., 97, 6037–6056, 1992.; Chang, J. S., Brost, R. A., Isaksen, I. S. A., Madronich, S., Middleton, P., Stockwell, W. R., and Walcek, C. J.: A three-dimensional Eulerian acid deposition model: Physical concepts and formulation, J. Geophys. Res., 81, 421–423, 1987.; Daum, P. H., Kleinman, L. I., Imre, D. G., Nunnermacker, L. J., Lee, Y.-N., Springston, S. R., Newman, L., and Weinstein-Lloyd, J.: Analysis of the processing of Nashville urban emissions on July 3 and July 18, 1995, J. Geophys. Res., 105, 9155–9164, 2000.; Daum P. H., Kleinman, L. I., Springston, S. R., Nunnermacker, L. J., Lee, Y.- N., Weinstein-Lloyd, J., Zheng, J., and Berkowitz, C. M.: A comparative study of O3 formation in the Houston urban and industrial plumes during the 2000 Texas Air Quality Study: J. Geophys. Res., 108, 4715, doi:10.1029/2003JD003552, 2003.; de Foy, B., Caetano, E., Magana, V., Zitacuaro, A., Cardenas, B., Retama, A., Ramos, R., Molina, L. T., and Molina, M. J.: Mexico City basin wind circulation during the MCMA-2003 field campaign, Atmos. Chem. Phys., 5, 2267–2288, 2005.; de Foy, B., Clappier, A., Molina, L. T., and Molina, M. J.: Distinct wind convergence patterns due to thermal and momentum forcing of the low level jet into the Mexico City basin, Atmos. Chem. Phys., 6, 1249–1265, 2006a.; de Foy, B., Molina, L. T., and Molina, M. J.: Satellite-derived land surface parameters for mesoscale modeling of the Mexico City basin, Atmos. Chem. Phys., 6, 1315–1330, 2006b.; de Foy, B., Lei, W., Zavala, M., Volkamer, R., Samuelsson, J., Mellqvist, J., Galle, B., Martínez, A.-P., Grutter, M., Retama, A., and Molina, L. T.: Modelling constraints on the emission inventory and on vertical dispersion for CO and SO2 in the Mexico City Metropolitan Area using Solar FTIR and zenith sky UV spectroscopy, Atmos. Chem. Phys., 7, 781–801, 2007.; Doran, J. C., Abbott, S., Archuleta, J., Bian, X., Chow, J., Coulter, R. L., de Wekker, S. F. J., Edgerton, S., Elliott, S., Fernandez, A.

 

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