HR: 10:35h
AN: A42A-02    [Abstracts]
TI: Impacts of Megacities on Regional Air Quality from MOPITT Observations and MOZART Model Results
AU: * Emmons, L K
EM: emmons@ucar.edu
AF: National Center for Atmospheric Research, Atmospheric Chemistry Division PO Box 3000, Boulder, CO 80307-3000, United States
AU: Edwards, D P
EM: edwards@ucar.edu
AF: National Center for Atmospheric Research, Atmospheric Chemistry Division PO Box 3000, Boulder, CO 80307-3000, United States
AU: Hess, P G
EM: hess@ucar.edu
AF: National Center for Atmospheric Research, Atmospheric Chemistry Division PO Box 3000, Boulder, CO 80307-3000, United States
AU: Lamarque, J
EM: lamar@ucar.edu
AF: National Center for Atmospheric Research, Atmospheric Chemistry Division PO Box 3000, Boulder, CO 80307-3000, United States
AU: Pfister, G
EM: pfister@ucar.edu
AF: National Center for Atmospheric Research, Atmospheric Chemistry Division PO Box 3000, Boulder, CO 80307-3000, United States
AU: Wiedinmyer, C
EM: christin@ucar.edu
AF: National Center for Atmospheric Research, Atmospheric Chemistry Division PO Box 3000, Boulder, CO 80307-3000, United States
AU: Clerbaux, C
EM: catherine.clerbaux@aero.jussieu.fr
AF: Service d'Aeronomie, Universite Pierre et Marie Curie, 4 place Jussieu, Paris, 75252, France
AB: The emissions from large cities, such as Mexico City, Los Angeles and Tokyo, as well as densely populated regions in India, China, etc., can clearly be seen in the CO retrievals from the Measurements of Pollution in the Troposphere (MOPITT) instrument on the Terra satellite and will be illustrated in this presentation. To assist in the flight planning and analysis of the MILAGRO field campaigns in Mexico during March 2006, MOPITT CO retrievals were assimilated in the global chemical transport model MOZART, using fire emissions based on satellite observations. To understand the impacts of Mexico City and other megacities on regional air quality, additional simulations of MOZART have been performed. The CO emissions from different types of sources (biomass burning, industry, etc.) are "tagged" in the model to show their relative contribution to the regional atmospheric composition. In addition, NO emissions from a single megacity or region are tagged to identify the contribution of ozone from a given source. The contribution from Mexico City pollution to the regional and global atmosphere will be compared to other megacities.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0365 Troposphere: composition and chemistry
DE: 0368 Troposphere: constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2007 Joint Assembly