HR: 0830h
AN: A41D-0717    [PDF]
TI: Evaluation of Reprocessed SAGE-I (V6.0) Ozone Data and Updates of Ozone Trends
AU: * Wang, H
EM: raywang@eas.gatech.edu
AF: Georgia Institute of Technology, School of EAS, 311 Ferst Drive, Atlanta, GA 30332
AU: Cunnold, D M
EM: cunnold@eas.gatech.edu
AF: Georgia Institute of Technology, School of EAS, 311 Ferst Drive, Atlanta, GA 30332
AU: Thomason, L W
EM: l.w.thomason@nasa.gov
AF: NASA Langley Research Center, mail stop 475, NASA LaRC, Hampton, VA 23681
AU: Kizer, S H
EM: s.h.kizer@nasa.gov
AF: SAIC Corporation, mail stop 475, NASA LaRC, Hampton, VA 23681
AB: The SAGE-I (V5.9) ozone data have been found to have altitude registration errors of approximately 300 meter (Wang et al., 1996) due to ephemeris errors. Empirical corrections were applied to SAGE-I ozone data before they were used in many ozone trend studies (e.g. SPARC report 1998, WMO 2002). A recent study based on SAGE-I/II (1979 to July 2000) and HALOE (Oct. 1991 to April 2003) ozone measurements, indicates a slow down of upper stratospheric ozone loss since 1997 (Newchurch et al., 2003). It has, however, been argued that the uncertainty in empirically corrected SAGE-I ozone data and solar cycle effects may result in larger uncertainties on the ozone trends estimated by Newchurch et al. (2003). This paper will evaluate a new SAGE-I (V6.0) ozone data retrieval, which attempts to correct altitude registration errors. Correlative measurements from SBUV and ozonesondes will be used to validate the SAGE-I (V6.0) data and the altitude corrections will be compared against those in Wang et al (1996). The quality of the reprocessed SAGE-I ozone data below 20 km altitudes will also be evaluated. In addition updated ozone trends based on SAGE-I (V6.0) and SAGE-II (V6.2, including data after July 2000) will also be presented. Reference, 1. Newchurch M. J., Eun-Su Yang, D. M. Cunnold, Gregory C. Reinsel, J. M. Zawodny, James M. III Russell, Evidence for slowdown in stratospheric ozone loss: First stage of ozone recovery, J. Geophys. Res., 108, D16, 8617, 10.1029/2002JD003114 2. Wang H.J., D. M. Cunnold, and X. Bao, A critical analysis of SAGE ozone trends, J. Geophys. Res., 101, 12,495-12,514, 1996 3. Assessment of Trends in the Vertical Distribution of Ozone, SPARC report, 1998, WMO-Ozone Research and Montoring Project Report No 43. 4. Scientific Assessment of Ozone Depletion: 2002, WMO
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0340 Middle atmosphere--composition and chemistry
DE: 3360 Remote sensing
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting