HR: 0800h
AN: A41B-0038    [Abstracts]
TI: Constraining Tropospheric CO and Ozone by Assimilating TES and MLS Tropospheric Retrievals Into a Global 3D CTM
AU: * Richards, N A
EM: nigel.richards@jpl.nasa.gov
AF: Jet Propulsion Laboratory California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109-8099 United States
AU: Li, Q
EM: qinbin.li@jpl.nasa.gov
AF: Jet Propulsion Laboratory California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109-8099 United States
AB: We present the first chemical data assimilation of TES and MLS tropospheric profile information into a global CTM. We use a sequential sub-optimal Kalman filter assimilation scheme to assimilate tropospheric profiles of CO and ozone into the GEOS-Chem model. The assimilation system produces a solution that is consistent with both the model and the data, within the uncertainties of each and provides an estimate of the error on the analysed product. The Tropospheric Emission Spectrometer (TES) is an infrared instrument which was launched onboard NASA's Aura satellite in 2004. TES is the first instrument to provide vertical information on tropospheric ozone whilst simultaneously measuring CO on a global basis. The Microwave Limb Sounder (MLS), also on Aura, provides information on the upper tropospheric concentrations of CO and ozone. The GEOS-CHEM model is driven by assimilated meteorological observations from the Goddard Earth Observing System (GEOS) of the NASA Global Modeling Assimilation Office (GMAO). The version of the model employed here is driven by GEOS-4 assimilated meteorological fields and has a horizontal resolution of 4 x 5 degrees with 30 vertical levels from the surface to 0.01 hPa. Results will be presented for the period of September 2004 - January 2005 and comparisons with independent measurements such as MOPITT and MOZAIC will be conducted to assess the quality of the assimilated product.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0365 Troposphere: composition and chemistry
DE: 0368 Troposphere: constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005