HR: 1340h
AN: A53C-1357    [Abstracts]
TI: North American Pollutant Export and Associated Ozone Radiative Forcing During the Summers of 2002 and 2004
AU: * Martini, M
EM: martini@atmos.umd.edu
AF: Dept. of Atmospheric and Oceanic Science, University of Maryland, College Park, MD 20742-2425, United States
AU: Allen, D J
EM: allen@atmos.umd.edu
AF: Dept. of Atmospheric and Oceanic Science, University of Maryland, College Park, MD 20742-2425, United States
AU: Pickering, K E
AF: NASA-GSFC, Code 613.3, Greenbelt, MD 20742, United States
AU: Stenchikov, G L
AF: Dept. of Environmental Sciences, Rutgers University, 14 College Farm Road, New Brunswick, NJ 08901, United States
AU: Hyer, E J
AF: Naval Research Laboratory, 7 Grace Hopper Ave., Monterey, CA 93943, United States
AB: The anthropogenic contribution to North American pollutant export and ozone radiative forcing is evaluated for the summers of 2002 and 2004. The evaluation is performed using the University of Maryland Chemistry and Transport Model (UMD-CTM) driven by GEOS-4 CERES reanalysis data. The goals of the simulations are to quantify North American pollutant outflow and to estimate the effects of this outflow on the forcing of climate by tropospheric ozone. Simulations are performed with and without North American anthropogenic emissions. Year-specific biomass burning emissions are used. As the first part of this evaluation, model output is compared to satellite-(MOPITT CO and SCIAMACHY NO2), aircraft-(UMD RAMMPP O3, NASA DC-8 and NOAA P-3), and ground-based measurements (AIRMAP, CASTNET, NOAA CMDL), and to output from simulations with the Global Modeling Initiative (GMI) CTM. Export and import fluxes of NOx and NOy are calculated. As the second part of this evaluation, the radiative forcing due to the additional ozone production by North American anthropogenic emissions was calculated. Clear sky infrared forcing approaching 1 Watt per square meter was seen over portions of the eastern United States and the western Atlantic during some pollution episodes. Smaller values of this forcing were seen throughout Europe and northern Africa. We compare the magnitudes of the North American pollutant export and radiative forcing between the 2002 Summer season (more polluted along the US east coast) and the cleaner Summer of 2004.
DE: 0317 Chemical kinetic and photochemical properties
DE: 0322 Constituent sources and sinks
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 Fall Meeting