HR: 11:05h
AN: A32C-03    [Abstracts]
TI: Evaluation of Heterogeneous Processes in the Polar Lower Stratosphere in the Whole Atmosphere Community Climate Model (WACCM).
AU: * Tilmes, S
EM: tilmes@ucar.edu
AF: National Center for Atmospheric Research, Boulder, CO, USA, P.O. Box 3000, Boulder, CO 80307-3000 United States
AU: Kinnison, D E
EM: dkin@ucar.edu
AF: National Center for Atmospheric Research, Boulder, CO, USA, P.O. Box 3000, Boulder, CO 80307-3000 United States
AU: Garcia, R
EM: rgarcia@ucar.edu
AF: National Center for Atmospheric Research, Boulder, CO, USA, P.O. Box 3000, Boulder, CO 80307-3000 United States
AB: Chemical ozone loss and related heterogeneous processes in polar regions are analyzed using results from three secular 54-year WACCM simulations (1950-2003). Meteorological fields, vortex lifetime, and strength of the vortex are compared to available UKMO meteorological analysis between 1992-2005. For Arctic winters, analyzed features of warm, moderately warm, and cold years are derived using HALOE satellite measurements and will be compared with similar WACCM Arctic winters. Accumulated ozone loss derived using ILAS-II measurements will be compared to a typical Antarctic winter of the WACCM model. Model and observational differences in both Arctic and Antarctic chemical ozone loss will be highlighted. In addition, the evolution of the WACCM derived temperature trend and PSC existence in high latitude polar regions will be presented for each simulation, for the entire 54-year period. Finally, the relation between chemical ozone loss and PSC existence of WACCM results will be presented and compared with measurements.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0317 Chemical kinetic and photochemical properties
DE: 0340 Middle atmosphere: composition and chemistry
DE: 0341 Middle atmosphere: constituent transport and chemistry (3334)
DE: 3334 Middle atmosphere dynamics (0341, 0342)
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005