HR: 17:00h
AN: A54A-05    [Abstracts]
TI: Effects of Field Inhomogeneity on High-Latitude Ozone Measurements From Spaceborne Remote Sensing
AU: * Yee, J
EM: jeng-hwa.yee@jhuapl.edu
AF: JHU/Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723 United States
AU: Swartz, W H
EM: bill.swartz@jhuapl.edu
AF: JHU/Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723 United States
AU: DeMajistre, R
EM: robert.demajistre@jhuapl.edu
AF: JHU/Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723 United States
AU: Shetter, R E
EM: shetter@ucar.edu
AF: National Center for Atmospheric Research, 1850 Table Mesa Drive, Boulder, CO 80305 United States
AU: Randall, C E
EM: randall@lasp.colorado.edu
AF: Laboratory for Atmospheric and Space Physics, UCB 392 University of Colorado, Boulder, CO 80309 United States
AU: Lloyd, S A
EM: steven.lloyd@jhuapl.edu
AF: JHU/Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723 United States
AB: Existing and future satellite retrievals and their validation are rendered problematic by spatial gradients and variability in species composition on both large and small spatial scales (e.g., high-latitude ozone). High--solar zenith angle observations of slant column ozone made during the second SAGE~III Ozone Loss and Validation Experiment (SOLVE~II) are compared with forward model simulations based on (1) vertical column ozone profiles and assuming spatial homogeneity (1-D) and (2) simulations using 3-D ozone fields determined by an ozone proxy mapping technique, which captures ozone horizontal gradients. Retrieval--model comparisons clearly demonstrate the errors associated with the homogeneity assumption in the context of line-of-sight ozone during SOLVE~II. A discussion of inhomogeneity effects on spaceborne remote sensing measurements, such as from Aura and TOMS, and their validation is also presented.
DE: 1640 Remote sensing
DE: 0340 Middle atmosphere--composition and chemistry
DE: 0360 Transmission and scattering of radiation
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting