HR: 15:10h
AN: A33H-07 INVITED    [Abstracts]
TI: Dynamical variability of UTLS ozone and mixing near the extratropical tropopause from Atmospheric Infrared Sounder (AIRS) data
AU: * Pan, L L
EM: liwen@ucar.edu
AF: National Center for Atmospheric Research, 1850 Table Mesa Drive, Boulder, CO 80305,
AU: Randel, W
EM: randel@ucar.edu
AF: National Center for Atmospheric Research, 1850 Table Mesa Drive, Boulder, CO 80305,
AU: Wei, J
EM: Jennifer.Wei@noaa.gov
AF: QSS Group Inc., 5201 Auth Rd., Camp Springs, MD 20746,
AU: Barnet, C
EM: Chris.Barnet@noaa.gov
AF: NOAA National Environmental Satellite Data and Information Service, 5201 Auth Rd., Camp Springs, MD 20746,
AU: Gettelman, A
EM: andrew@ucar.edu
AF: National Center for Atmospheric Research, 1850 Table Mesa Drive, Boulder, CO 80305,
AU: Hall, W
EM: hallb@ucar.edu
AF: National Center for Atmospheric Research, 1850 Table Mesa Drive, Boulder, CO 80305,
AB: Understanding the role of dynamics in controlling the UTLS composition is a key element for predicting chemistry-climate interaction. Using newly available global ozone and water vapor data from AIRS on the NASA Aqua satellite, combined with meteorological data, we present an analysis of the dynamical variability of ozone in the UTLS region and the preferred locations of mixing across the tropopause. Key validation results and information content analyses will be discussed for both version 4 and version 5 retrieval. Our initial analyses, including comparisons with aircraft in situ and ozonesonde data, show that AIRS ozone profile data has ability to resolve synoptic-scale variability in the region of the extratropical tropopause, largely owing to its high horizontal resolution. In addition, AIRS collocated measurements of ozone and water vapor profiles in the UTLS region provide an opportunity to investigate the mixing between stratosphere and troposphere, using tracer-tracer correlations, on a global scale. Consistent with the conclusions of aircraft in situ data analyses, the preferred regions of mixing derived from AIRS data are on the cyclonic (poleward) side of the subtropical jet in association with the large separation of the thermal and dynamical tropopause.
DE: 3334 Middle atmosphere dynamics (0341, 0342)
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting