J3.3
Determination of surface and atmospheric parameters under cloudy conditions from AIRS/AMSU/HSB data
Joel Susskind, NASA/GSFC, Greenbelt, MD; and C. Barnet and J. Blaisdell
AIRS/AMSU A/HSB will fly on the EOS Aqua platform, currently expected to launch in January 2002. AIRS is a high spectral resolution infra red spectrometer with 2378 channels between 650 cm-1 and 2675 cm-1 having a spectral resolving power of 1200 and a spatial resolution of 13 km at nadir. HSB is a 4 channel microwave sounder similar to AMSU B with the same spatial resolution as AIRS. AIRS team products will be produced one year after launch and will include: temperature-moisture-ozone profiles; sea/land surface skin temperatures; cloud height and amount; OLR and clear sky OLR; and clear column radiances, which represent the AIRS radiances coming from the clear portions of the scene. One sounding will be produced for each AMSU A footprint, which is 45 km at nadir, for most products, but cloud and OLR parameters will be given for each AIRS footprint. A flag is given to indicate those scenes which are thought to be cloud free. The clear column radiances are given for all cases in which a succesful retrieval was performed, whether the scene was cloud free or partially cloudy, along with a measure of how different the clear column radiances are from observed radiances. Successful retrievals are produced for most scenes in up to 80% cloud cover within an AMSU A footprint. Simulation based results will be shown giving errors of temperature-moisture profiles and clear column radiances for cases called clear and as a function of retrieved cloudiness.
Joint Session 3, Joint session with the Sixth Symposium on Integrated Observing Systems and the Symposium on Observations, Data Assimilation, and Probabilistic Prediction
Thursday, 17 January 2002, 1:30 PM-2:45 PM
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