HR: 11:20h
AN: A42A-05    [Abstracts]
TI: Evaluation of a Three-Dimensional Chemical Transport Model (PMCAMx) in the Mexico City Metropolitan Area
AU: * Tsimpidi, A P
EM: tsimpidi@chemeng.upatras.gr
AF: Department of Chemical Engineering, University of Patras, 1 Karatheodori, Patras, Ach 26504, Greece
AU: Karydis, V A
EM: vlkarydis@chemeng.upatras.gr
AF: Department of Chemical Engineering, University of Patras, 1 Karatheodori, Patras, Ach 26504, Greece
AU: Zavala, M
EM: miguelz@mit.edu
AF: Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology (MIT), 77 massachusetts avenue, Cambridge, MA 02139-4307, United States
AU: Zavala, M
EM: miguelz@mit.edu
AF: Molina Center for Energy and the Environment (MCE2), 3262 Holiday Ct. Suite 201, La Jolla, CA 92037, United States
AU: Lei, W
EM: wflei@mit.edu
AF: Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology (MIT), 77 massachusetts avenue, Cambridge, MA 02139-4307, United States
AU: Lei, W
EM: wflei@mit.edu
AF: Molina Center for Energy and the Environment (MCE2), 3262 Holiday Ct. Suite 201, La Jolla, CA 92037, United States
AU: Molina, L T
EM: ltmolina@mit.edu
AF: Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology (MIT), 77 massachusetts avenue, Cambridge, MA 02139-4307, United States
AU: Molina, L T
EM: ltmolina@mit.edu
AF: Molina Center for Energy and the Environment (MCE2), 3262 Holiday Ct. Suite 201, La Jolla, CA 92037, United States
AU: Pandis, S N
EM: spyros@chemeng.upatras.gr
AF: Department of Chemical Engineering, University of Patras, 1 Karatheodori, Patras, Ach 26504, Greece
AU: Pandis, S N
EM: spyros@chemeng.upatras.gr
AF: Department of Chemical Engineering, Carnegie Mellon University (CMU), 5000 Forbes Ave., Pittsburgh, PA 15213, United States
AB: Atmospheric aerosols have adverse effects on human health, contribute to the visibility reduction and influence the energy balance of the planet. A three-dimensional chemical transport model (PMCAMx) (Gaydos et al., 2007) is used to simulate the particular matter (PM) mass composition distribution in the Mexico City Metropolitan Area (MCMA). PMCAMx uses the framework of CAMx (ENVIRON, 2002) modelling the processes of horizontal and vertical advection, horizontal and vertical dispersion, wet and dry deposition, and gas-phase chemistry. In addition to the above, PMCAMx includes three detailed aerosol modules: inorganic aerosol growth (Gaydos et al., 2003; Koo et al., 2003a), aqueous-phase chemistry (Fahey and Pandis, 2001), and secondary organic aerosol formation and growth (Koo et al., 2004). The aerosol thermodynamic model ISORROPIA has been improved as it now simulates explicitly the chemistry of Ca, Mg, and K salts and is linked to PMCAMx. The hybrid approach (Koo et al., 2003b) for modelling aerosol dynamics is applied in order to accurately simulate the inorganic components in coarse mode. This approach assumes that the smallest particles are in equilibrium while the condensation/evaporation equation is solved for the larger ones. The new CMU organic aerosol model, which is based on the splitting of the organic aerosol volatility range in discrete bins, is also used. The model predictions are evaluated against the PM and vapour concentration measurements from the MCMA-2003 Campaign (Molina et al., 2007). References Gaydos, T., Pinder, R., Koo, B., Fahey, Κ., Yarwood, G., and Pandis, S. N., (2007). Development and application of a three-dimensional Chemical Transport Model, PMCAMx. Atmospheric Environment, in press. ENVIRON (2002). User's guide to the comprehensive air quality model with extensions (CAMx). Version 3.10. Report prepared by ENVIRON International corporation, Novato, CA Gaydos, T., Koo, B., and Pandis, S. N., (2003). Development and application of an efficient moving sectional approach for the solution of the atmospheric aerosol condensation/evaporation equations. Atmospheric Environment, 37, 3303-3316. Fahey, K. and Pandis, S. N., (2001). Optimizing model performance: variable size resolution in cloud chemistry modelling. Atmospheric Environment 35, 4471-4478. Koo, B., Pandis S. N., and Ansari, A. (2003a). Integrated approaches to modelling the organic and inorganic atmospheric aerosol components. Atmospheric Environment, 37, 4757-4768. Koo, B., Gaydos, T.M., Pandis, S.N., (2003b). Evaluation of the equilibrium, hybrid, and dynamic aerosol modeling approaches. Aerosol Science and Technology 37, 53-64 Molina, L.T., Kolb, C.E., de Foy, B., Lamb, B., Brune, W., Molina, M.J., (2007). Air Quality in North Americas Most Populous City Overview of MCMA-2003 Campaign. Atmos. Chem. Phys. Discuss. 7.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
SC: Atmospheric Sciences [A]
MN: 2007 Joint Assembly