HR: 0800h
AN: A51D-0807    [Abstracts]
TI: Lower Stratosphere and Column Ozone Measurements from SAGE and HALOE
AU: * Wang, H
EM: raywang@eas.gatech.edu
AF: Georgia Institute of Technology , 311 Ferst Drive, Atlanta, GA 30332-0340 United States
AU: Cunnold, D M
EM: cunnold@eas.gatech.edu
AF: Georgia Institute of Technology , 311 Ferst Drive, Atlanta, GA 30332-0340 United States
AU: Yang, E
EM: yes@eas.gatech.edu
AF: Georgia Institute of Technology , 311 Ferst Drive, Atlanta, GA 30332-0340 United States
AU: Thomason, L W
EM: l.w.thomason@nasa.gov
AF: NASA Langley Research Center, NASA LaRC, Hampton, VA 23681 United States
AU: Zawodny, J M
EM: J.M.Zawodny@larc.nasa.gov
AF: NASA Langley Research Center, NASA LaRC, Hampton, VA 23681 United States
AU: Trepte, C
EM: c.r.trepte@larc.nasa.gov
AF: NASA Langley Research Center, NASA LaRC, Hampton, VA 23681 United States
AB: Both the Stratospheric Aerosol and Gas Experiment (SAGE) II (1984-present) and Halogen Occultation Experiment (HALOE) (1991-present) use solar occultation technique to measure ozone, aerosol extinctions and other trace gases. The SAGE-II ozone (V6.1) data have been shown to be of excellent quality, with accuracy of $\sim$10% or better, down to tropopause (Wang et al., 2002). The HALOE (v18) ozone data also show good agreements with ozonesonde. The differences are within 10% down to 100 hPa at tropical/subtropical regions and to 200 hPa at extratropical latitudes (Bhatt et al., 1999). In this study ozone profiles and stratospheric columns from the latest SAGE-II (v6.2) and HALOE (V19) retrievals will be further evaluated and compared by applying the PV mapping technique. Attempt will be made to combine both datasets and to derive tropospheric column ozone by the residual method (e.g. Chandra et al., 2003). This information will be beneficial to future/new satellite measurements such as AURA. The SAGE-III (2002-present) is a new generation of occultation instrument. It uses an 800 element Charged Couple Device (CCD) linear array to provide continuous spectral coverage from 280 to 1040 nm, and an additional photodiode at 1550 nm to extend aerosol information at longer wavelength. Since the SAGE-III has much higher spectral resolution (1-2 nm) than its predecessors, the retrieved ozone is less sensitive to enhanced aerosol or cloud. In other word it could provide more information for tropospheric ozone. The SAGE-III ozone quality especially in the lower stratosphere and troposphere will also be examined in this study. References Bhatt, P. P., E. E. Remsberg, L. L. Gordley, J. M. McInerney, V. G. Brackett, and J. M. Russell, An evaluation of the quality of Halogen Occultation Experiment ozone profiles in the lower stratosphere, J. Geophys. Res., 104, D8, 9,261-9,275, 1999. Chandra, S., J. R. Ziemke, and R. V. Martin, Tropospheric ozone at tropical and middle latitudes derived from TOMS/MLS residual: Comparison with a global model, J. Geophys. Res., 108(D9), 4291, doi:10.1029/2002JD002912, 2003. Wang H.J., D. M. Cunnold, L. W. Thomason, J. M. Zawodny, and G. E. Bodeker, Assessment of SAGE version 6.1 ozone data quality, J. Geophys. Res., 107(D23), 4691, doi:10.1029/2002JD002418, 2002
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0340 Middle atmosphere--composition and chemistry
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting