HR: 12:00h
AN: SA32A-07 INVITED     [Abstracts]
TI: Assessment of Mesospheric Chemistry From TIMED and Global Models
AU: * Smith, A K
EM: aksmith@ucar.edu
AF: NCAR/ACD, P.O. Box 3000, Boulder, CO 80307
AU: Marsh, D R
EM: marsh@ucar.edu
AF: NCAR/ACD, P.O. Box 3000, Boulder, CO 80307
AB: TIMED measures several trace species plus other fields relevant to chemistry such as temperature, radiative emissions, horizontal winds and solar flux. This presentation will focus on assessment of how these measurements accord with our current understanding from global models. The story is mixed. There are aspects that are simulated very well in models but others where models diverge from the observations. In some cases, the discrepancy can be reduced by changing poorly-know model parameters such as tidal forcing by diurnal heating in the troposphere or the magnitude of the turbulent Prandtl number. Other discrepancies point to gaps in our understanding.
DE: 0310 Airglow and aurora
DE: 0340 Middle atmosphere: composition and chemistry
DE: 0341 Middle atmosphere: constituent transport and chemistry (3334)
SC: SPA-Aeronomy [SA]
MN: Fall Meeting 2005