HR: 1340h
AN: A23A-0777    [Abstracts]
TI: Lightning NO$_{X}$ Production and Ozone Photochemistry in the July 10 1996 STERAO Storm Studied with a 3-D Coupled Cloud/Chemistry Model
AU: * Ott, L E
EM: leo@atmos.umd.edu
AF: Department of Meteorology, University of Maryland - College Park, University of Maryland, College Park, MD 20742 United States
AU: Pickering, K E
EM: pickerin@atmos.umd.edu
AF: Department of Meteorology, University of Maryland - College Park, University of Maryland, College Park, MD 20742 United States
AU: Stenchikov, G L
EM: gera@envsci.rutgers.edu
AF: Department of Environmental Sciences, Rutgers University, 14 College Farm Road, New Brunswick, NJ 08901-8551 United States
AB: On July 10 1996, the development of a multicellular storm was observed during the Stratospheric-Tropospheric Experiment: Radiation, Aerosols and Ozone (STERAO) field campaign. During the storm, cloud-to-ground lightning flashrates were available from the National Lightning Detection Network, and total lightning activity was observed by the ONERA interferometer. The 3-D Goddard Cumulus Ensemble (GCE) cloud resolving model and an accompanying cloud scale chemical transport model (CSCTM) were used to simulate the evolution and chemical environment of the observed thunderstorm. Estimates of NO$_{X}$ production per lightning flash and per meter of lightning flash channel were obtained by comparing in situ chemical observations taken in the thunderstorm anvil with model results. The effect of lightning produced NO$_{X}$ on ozone was analyzed by comparing a simulation including lightning NO$_{X}$ production with a simulation which did not include a source of lightning NO$_{X}$. In order to estimate the effects of lightning NO$_{X}$ on downstream ozone production in the 24 hours following the convection, a chemistry-only version of the CSCTM was employed.
DE: 3324 Lightning
DE: 0320 Cloud physics and chemistry
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting