HR: 17:45h
AN: A54B-08    [Abstracts]
TI: Evaluation of Global Stratospheric Models with Aura Observations
AU: * Kawa, S R
EM: kawa@maia.gsfc.nasa.gov
AF: NASA, Goddard Space Flight Center, Greenbelt, MD 20771 United States
AU: Pawson, S
EM: pawson@gmao.gsfc.nasa.gov
AF: NASA, Goddard Space Flight Center, Greenbelt, MD 20771 United States
AU: Douglass, A R
EM: anne.r.douglass@nasa.gov
AF: NASA, Goddard Space Flight Center, Greenbelt, MD 20771 United States
AU: Newman, P A
EM: paul.a.newman@nasa.gov
AF: NASA, Goddard Space Flight Center, Greenbelt, MD 20771 United States
AU: Schoeberl, M R
EM: mark.r.schoeberl@nasa.gov
AF: NASA, Goddard Space Flight Center, Greenbelt, MD 20771 United States
AU: McGee, T
EM: thomas.j.mcgee@nasa.gov
AF: NASA, Goddard Space Flight Center, Greenbelt, MD 20771 United States
AU: Zhu, Z
EM: zhu@code916.gsfc.nasa.gov
AF: NASA, Goddard Space Flight Center, Greenbelt, MD 20771 United States
AU: Santee, M
EM: mls@mls.jpl.nasa.gov
AF: NASA, Jet Proplusion Laboratory, Pasadena, CA 91109 United States
AU: Froideveaux, L
EM: lucien@mls.jpl.nasa.gov
AF: NASA, Jet Proplusion Laboratory, Pasadena, CA 91109 United States
AU: Waters, J
EM: joe@mls.jpl.nasa.gov
AF: NASA, Jet Proplusion Laboratory, Pasadena, CA 91109 United States
AB: One of the discoveries inevitably to come from the Aura mission is how well or poorly our numerical models of stratospheric dynamics and chemistry perform in the face of new observations. The new species, enhanced coverage, and improved resolution provided by Aura measurements pose an unprecedented test of model theory and parameterization for chemical, dynamical and microphysical processes in the stratosphere. We have performed several model simulations using the Goddard GEOS4 meteorological data assimilation for 2004/2005 suitable for direct comparison with Aura data. These include off-line and on-line chemistry-transport simulation, chemical forecasts, and tests of varying model resolution and boundary conditions. The seasonal runs with assimilated winds are just one implementation of a hierarchy of chemistry-circulation models used to simulate ozone and climate interaction, so their evaluation is critical to assess climate-chemistry projections. The focus will be on the polar stratosphere in association with the Polar Aura Validation Experiment (PAVE) aircraft campaign. Key issues to be addressed include our representation of halogen abundance and partitioning, ozone loss processes and rates, residual circulation, wave breaking, and polar stratospheric clouds. We use Aura MLS, OMI, and aircraft data. One encouraging early finding is that there is little difference between the on-line and off-line simulations in the current configuration. Analysis of model performance and direction of impending improvements will be presented.
DE: 0340 Middle atmosphere: composition and chemistry
DE: 0341 Middle atmosphere: constituent transport and chemistry (3334)
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005