HR: 0830h
AN: A21A-13    [Abstracts]
TI: Global Distribution of Tropospheric Ozone from GOME and Comparison with GEOS-CHEM Model Results
AU: * Chance, K
EM: kchance@cfa.harvard.edu
AF: Harvard-Smithsonian Center for Astrophysics, Atomic and Molecular Physics Division, Cambridge, MA 02138 United States
AU: Liu, X
EM: xliu@cfa.harvard.edu
AF: Harvard-Smithsonian Center for Astrophysics, Atomic and Molecular Physics Division, Cambridge, MA 02138 United States
AU: Sioris, C E
EM: csioris@cfa.harvard.edu
AF: Harvard-Smithsonian Center for Astrophysics, Atomic and Molecular Physics Division, Cambridge, MA 02138 United States
AU: Spurr, R J
EM: rtsolutions@verizon.net
AF: Harvard-Smithsonian Center for Astrophysics, Atomic and Molecular Physics Division, Cambridge, MA 02138 United States
AU: Kurosu, T P
EM: tkurosu@cfa.harvard.edu
AF: Harvard-Smithsonian Center for Astrophysics, Atomic and Molecular Physics Division, Cambridge, MA 02138 United States
AU: Martin, R V
EM: rvmartin@fizz.phys.dal.ca
AF: Harvard-Smithsonian Center for Astrophysics, Atomic and Molecular Physics Division, Cambridge, MA 02138 United States
AU: Martin, R V
EM: rvmartin@fizz.phys.dal.ca
AF: Dalhousie University, Department of Physics and Atmospheric Sciences, Halifax, NS B3H 3J5 Canada
AU: Fu, M
EM: fu@fas.harvard.edu
AF: Harvard University, Division of Engineering and Applied Sciences and Department of Earth and Planetary Sciences, Cambridge, MA 02138 United States
AU: Palmer, P I
EM: pip@io.harvard.edu
AF: Harvard University, Division of Engineering and Applied Sciences and Department of Earth and Planetary Sciences, Cambridge, MA 02138 United States
AU: Jacob, D J
EM: djj@io.harvard.edu
AF: Harvard University, Division of Engineering and Applied Sciences and Department of Earth and Planetary Sciences, Cambridge, MA 02138 United States
AU: Newchurch, M J
EM: mike@nsstc.uah.edu
AF: University of Alabama in Huntsville, Atmospheric Science Department, Huntsville, AL 35899 United States
AU: Bhartia, P K
EM: pawan.bhartia@nasa.gov
AF: NASA Goddard Space Flight Center, Atmospheric Chemistry and Dynamics Branch, Greenbelt, MD 20771 United States
AB: We present the first directly retrieved global distribution of tropospheric column ozone from satellite-based measurements. Tropospheric ozone is derived from backscattered radiance spectra in the ultraviolet measured by GOME. We validate the retrievals globally with ozonesonde observations at 33 ozonesonde stations. The retrieved tropospheric ozone well captures the temporal variability of ozonesonde observations and the biases are generally within 5 DU. The global distribution of tropospheric ozone reveals previously unrecognized features, such as bands of high ozone (e.g., 40-50 DU) at mid-latitudes during the spring and summer, and clearly shows signals due to biomass burning, air pollution, stratosphere-troposphere exchange, transport, and convection. We compare the retrievals with the global tropospheric chemistry model GEOS-CHEM; the overall structures are similar, but significant differences exist. We investigate the new ozone features with GEOS-CHEM model and other models and measurements.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0365 Troposphere--composition and chemistry
DE: 0368 Troposphere--constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2005 Joint Assembly