HR: 10:20h
AN: A12C-01 INVITED    [Abstracts]
TI: Modeling Overview of the MILAGRO Field Campaign
AU: * Madronich, S
EM: sasha@ucar.edu
AF: National Center for Atmospheric Research, P.O.Box 3000, Boulder, CO 80307, United States
AU: Hodzic, A
EM: alma@ucar.edu
AF: National Center for Atmospheric Research, P.O.Box 3000, Boulder, CO 80307, United States
AU: Tie, X
EM: xxtie@ucar.edu
AF: National Center for Atmospheric Research, P.O.Box 3000, Boulder, CO 80307, United States
AU: Wiedinmyer, C
EM: christin@ucar.edu
AF: National Center for Atmospheric Research, P.O.Box 3000, Boulder, CO 80307, United States
AU: Zaveri, R
EM: rahul.zaveri@pnl.gov
AF: Pacific Northwest National Laboratory, P.O.Box 999, Richland, WA 99352, United States
AU: Fast, J
EM: jerome.fast@pnl.gov
AF: Pacific Northwest National Laboratory, P.O.Box 999, Richland, WA 99352, United States
AB: The MILAGRO field campaign (Mexico City, March 2006) provided an interesting and challenging data base for evaluating tropospheric chemistry models on the urban and regional scale. This urban to regional transition spans a large range of VOC/NOx chemical regimes, and is complicated by the presence of aerosol of various origin including biomass burning, fossil fuel use, and dust. Complex terrain, urban effects, and frequently weak synoptic forcing challenge the representation of dispersion in the models. While together these factors are unique to Mexico City and its surroundings, gains in understanding processes and model improvements may also apply to many other urbanized regions. The MILAGRO data are being used to evaluate a hierarchy of models, from process-level chemistry, microphysics, and radiation, to more parameterized 3D chemistry- transport models that are applied to regional and global scales. Areas of special interest include the evolution of aerosol (especially secondary organic), budgets and partitioning of reactive nitrogen and other photochemically active gases, heterogeneous interactions, and radiative closure. Some specific examples (e.g. with the WRF- Chem model) will be presented and additional opportunities will be discussed.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0360 Radiation: transmission and scattering
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting