HR: 0800h
AN: A51D-0824    [Abstracts]
TI: Trends Inferred From Stratospheric Aerosol and Gas Experiment II Water Vapor Measurements
AU: * Anderson, J
EM: John.Anderson@hamptonu.edu
AF: Hampton University, 23 Tyler Street, Hampton, VA 23668 United States
AU: Thomason, L W
EM: L.W.Thomason@nasa.gov
AF: NASA Langley Research Center, NASA LaRC Mail Stop 475, Hampton, VA 23681 United States
AU: Burton, S P
EM: s.p.burton@larc.nasa.gov
AF: SAIC, NASA LaRC Mail Stop 475, Hampton, VA 23681 United States
AU: McCormick, M P
EM: pat.mccormick@hamptonu.edu
AF: Hampton University, 23 Tyler Street, Hampton, VA 23668 United States
AU: Russell, J M
EM: james.russell@hamptonu.edu
AF: Hampton University, 23 Tyler Street, Hampton, VA 23668 United States
AB: The Stratospheric Aerosol and Gas Experiment (SAGE) II instrument has collected vertical profiles of stratospheric ozone, nitrogen dioxide, water vapor, and aerosol extinction at four wavelengths with high resolution since the program's inception in October, 1984. The SAGE II processing team has made great strides in characterizing stratospheric water vapor by performing a wavelength-shift and increasing the channel-width by 10 percent from 1986-present for the latest version (v6.2). These advancements have significantly reduced an apparent bias (that existed in previous versions) except in the proximity of heavy aerosol levels. This new water vapor product has been validated through comparisons with ground-based and satellite data. With the ~20-year record of near-global, high vertical resolution (1 km) water vapor measurements, it is imperative to assess the quality of this data for use in trend studies. We present our validation efforts of SAGE II water vapor trends. Analysis techniques include calculating trends in the difference time series between de-seasonalized SAGE II v6.2 and Halogen Occultation Experiment (HALOE) v19 anomalies to assess potential drifts in the v6.2 water vapor channel during the UARS time frame (October 1991 to present), direct comparisons with trends inferred from HALOE and ground-based instruments, and theoretical tests to assess channel drifts between 1984 to 1991.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0341 Middle atmosphere--constituent transport and chemistry (3334)
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting