HR: 1340h
AN: A43C-0075    [Abstracts]
TI: Evidence of Lightning NOx and Convective Transport of Pollutants in Satellite Observations Over North America
AU: * Choi, Y
EM: ychoi@eas.gatech.edu
AF: Georgia Institute of Technology, School of Earth and Atmospheric Science, Georgia Tech, Atlanta, GA 30332 United States
AU: Wang, Y
EM: ywang@eas.gatech.edu
AF: Georgia Institute of Technology, School of Earth and Atmospheric Science, Georgia Tech, Atlanta, GA 30332 United States
AU: Zeng, T
EM: tzeng@eas.gatech.edu
AF: Georgia Institute of Technology, School of Earth and Atmospheric Science, Georgia Tech, Atlanta, GA 30332 United States
AU: Martin, R V
EM: randall.martin@dal.ca
AF: Dalhousie University, Department of Physics and Atmospheric Science, Dalhousie University, Halifax, NS B3H 3J5 Canada
AU: Kurosu, T P
EM: tkurosu@cfa.harvard.edu
AF: Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 United States
AU: Chance, K
EM: kchance@cfa.harvard.edu
AF: Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 United States
AB: Column observations of NO$_{2}$ by GOME and CO by MOPITT over North America and surrounding oceans for April 2000 are analyzed using a regional chemical transport model. Transient enhancements in these measurements due to lightning NO$_{X}$ production or convective transport are examined. Evidence is found for lightning enhancements of NO$_{2}$ over the continent and western North Atlantic and for convective transport enhancements of CO over the ocean. The two independent satellite measurements show consistent enhancement related to convective events. Model results suggest that the enhancements are particularly large in the lower troposphere due to convective downdrafts of lightning NO$_{X}$ and shallow convection of CO, implying that low altitude aircraft in situ observations are potentially critical for evaluating the model simulations and validating satellite observations of these transient features
DE: 4842 Modeling
DE: 6062 Satellites
DE: 3324 Lightning
DE: 3360 Remote sensing
DE: 0933 Remote sensing
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting