HR: 17:30h
AN: A54A-07    [Abstracts]
TI: Direct Tropospheric Ozone Retrieval from Global Ozone Monitoring Experiment (GOME)
AU: * Liu, X
EM: xliu@cfa.harvard.edu
AF: Atomic and Molecular Physics Division, Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS-50, Cambridge, MA 02138 United States
AU: Chance, K V
EM: kchance@cfa.harvard.edu
AF: Atomic and Molecular Physics Division, Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS-50, Cambridge, MA 02138 United States
AU: Sioris, C E
EM: csioris@cfa.harvard.edu
AF: Atomic and Molecular Physics Division, Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS-50, Cambridge, MA 02138 United States
AU: Spurr, R J
EM: rspurr@cfa.harvard.edu
AF: Atomic and Molecular Physics Division, Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS-50, Cambridge, MA 02138 United States
AU: Kurosu, T P
EM: tkurosu@cfa.harvard.edu
AF: Atomic and Molecular Physics Division, Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS-50, Cambridge, MA 02138 United States
AU: Martin, R V
EM: Randall.Martin@Dal.Ca
AF: Atomic and Molecular Physics Division, Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS-50, Cambridge, MA 02138 United States
AU: Martin, R V
EM: Randall.Martin@Dal.Ca
AF: Department of Physical and Atmospheric Sciences, Dalhousie University, Sir James Dunn Building, Room 129, Halifax, NS B3H 3J5 Canada
AU: Newchurch, M J
EM: mike@nsstc.uah.edu
AF: Atmospheric Science Department, University of Alabama in Huntsville, 320 Sparkman Drive, Huntsville, AL 35805 United States
AU: Bhartia, P K
EM: Pawan.Bhartia@nasa.gov
AF: Atmospheric Chemistry and Dynamics Branch, NASA Goddard Space and Flight Center, CODE 916, Greenbelt, MD 20771 United States
AB: We present the first directly retrieved global distribution of tropospheric ozone from satellite-based measurements. Tropospheric ozone and ozone profiles are derived from backscattered radiances in the ultraviolet spectra (i.e., 290-340 nm) measured by the nadir-viewing GOME. Tropospheric ozone is directly retrieved with daily NCEP/NCAR tropopause pressure as one of the retrieval levels. We perform detailed treatments of radiometric and wavelength calibrations and improve forward model inputs to achieve the fitting precision needed for tropospheric ozone. The calibrations include (a) variable slit width and shifts between radiance and irradiances, (b) real-time first-order Ring effect correction, (c) undersampling correction, (d) shift between measurements and trace gas cross sections, and (e) polarization correction. The TOMS Verison-8 ozone climatology is used to initialize a priori ozone profiles. The retrieved total ozone agrees well with TOMS V8 and Dobson total ozone, and tropospheric ozone and ozone profiles agree well with ozonesonde observations at 24 WOUDC stations from north pole (e.g., NyAlesund, 78.9­aN) to south pole (e.g., Neumayer, 70.7­aS).
DE: 1640 Remote sensing
DE: 0345 Pollution--urban and regional (0305)
DE: 0368 Troposphere--constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting