HR: 1340h
AN: A33B-0905    [Abstracts]
TI: Use of SBUV/2 and Dobson Datasets to Validate a New Brewer Ozone Profile Algorithm
AU: * Kireev, S V
EM: Stanislav.Kireev@hamptonu.edu
AF: Hampton University, Center for Atmospheric Sciences, 23 Tyler Street, Hampton, VA 23668 United States
AU: Petropavlovskikh, I V
EM: irina.petro@noaa.gov
AF: NOAA/ESRL/GMD, 325 Broadway, Boulder, CO 80305 United States
AU: Flynn, L E
EM: Lawrence.E.Flynn@noaa.gov
AF: NOAA/NESDIS, 5200 Auth Road, Camp Springs, MD 20746 United States
AU: McCormick, P M
EM: PAT.MCCORMICK@hamptonu.edu
AF: Hampton University, Center for Atmospheric Sciences, 23 Tyler Street, Hampton, VA 23668 United States
AB: Ground-based measurements of zenith sky UV radiation, made daily with Dobson and Brewer spectrometers worldwide, allow one to retrieve ozone profiles in 8 broad layers. The resulting datasets are a valuable source for validation of ozone monitoring measurements from space. As Dobson instruments age and are eventually replaced by the more modern Brewer instruments, there is a great need to compare data from the two systems. The differences in retrieved ozone have implications for long-term trend analysis, as errors could bring discontinuities into the time-series. Thus, it is important to find ways to make the two instruments' ozone estimates comparable. A new Brewer ozone profile algorithm is under development and is based on a recently introduced Dobson Umkehr algorithm [Petropavlovskikh et al., GRL 2005]. Results from a comprehensive validation of retrieved Brewer ozone profiles by comparison with coincident SBUV/2 and Dobson Umkehr data are presented. It includes not only total and layer-by-layer ozone comparisons for three observing systems, but also modeling of the expected Brewer measurement signals from application of a forward model to SBUV/2 and Dobson retrieved ozone estimates. Measurement residuals and ozone profile differences, obtained during these simulations, are presented, and their possible causes are discussed.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0394 Instruments and techniques
DE: 3360 Remote sensing
DE: 3399 General or miscellaneous
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005