• Chédin, A., 1985: Improved initialization inversion method: A high-resolution physical method for temperature retrievals from satellites of the TIROS-N series. J. Climate Appl. Meteor.,24, 128–143.

    • Crossref
    • Export Citation
  • Rossow, W. B., and R. A. Schiffer, 1991: ISCCP cloud data products. Bull. Amer. Meteor. Soc.,72, 2–20.

    • Crossref
    • Export Citation
  • Schmetz, J., and Coauthors, 1995: Monthly mean large-scale analysis of upper-tropospheric humidity and wind field divergence derived from three geostationary satellites. Bull. Amer. Meteor. Soc.,76, 1578–1584.

    • Crossref
    • Export Citation
  • Soden, A., and Coauthors, 2000: An intercomparison of radiation codes for retrieving upper tropospheric humidity in the 6.3-micron band: A report from the first GVaP Workshop. Bull. Amer. Meteor. Soc., in press.

    • Crossref
    • Export Citation
  • Soden, B. J., and F. P. Bretherton, 1993: Upper tropospheric humidity from the GOES 6.7-μm channel: Method and climatology for July 1987. J. Geophys. Res.,98, 16 669–16 688.

    • Crossref
    • Export Citation
  • Wang, J., G. P. Anderson, H. E. Revercomb, and R. O. Knuteson, 1996: Validation of FASCOD3 and MODTRAN3: Comparison of model calculations with ground-based and airborne interferometer observations under clear-sky conditions. Appl. Opt.,35, 6028–6040.

    • Crossref
    • Export Citation
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Evidence of Atmospheric Contamination on the Measurement of the Spectral Response of the GMS-5 Water Vapor Channel

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  • 1 Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado
  • | 2 Climate Diagnostic Center, NOAA/ERL, Boulder, Colorado
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Abstract

The GMS-5 geostationary satellite carries a channel centered at 6.7 μm for the measurement of upper-tropospheric humidity. This channel’s spectral response shows structures that are similar to those shown by the atmospheric transmission. This note shows that these structures probably result from water vapor absorption between the calibration source and the instrument while making the response measurement. A corrected filter is proposed after normalization by the inferred atmospheric transmission. The brightness temperatures computed by a radiative transfer model using the spurious response exhibit a warm bias of about 1 K.

Permanent affiliation: Laboratoire des Sciences du Climat et de l’Environment, CEA/DSM/LSCE, Saclay, France.

Corresponding author address: Dr. Francois-Marie Bréon, CIRES/NOAA, NOAA/ERL/CDC (R/E/CD), 325 Broadway, Boulder, CO 80303-3328.

Email: fmb@cdc.noaa.gov

Abstract

The GMS-5 geostationary satellite carries a channel centered at 6.7 μm for the measurement of upper-tropospheric humidity. This channel’s spectral response shows structures that are similar to those shown by the atmospheric transmission. This note shows that these structures probably result from water vapor absorption between the calibration source and the instrument while making the response measurement. A corrected filter is proposed after normalization by the inferred atmospheric transmission. The brightness temperatures computed by a radiative transfer model using the spurious response exhibit a warm bias of about 1 K.

Permanent affiliation: Laboratoire des Sciences du Climat et de l’Environment, CEA/DSM/LSCE, Saclay, France.

Corresponding author address: Dr. Francois-Marie Bréon, CIRES/NOAA, NOAA/ERL/CDC (R/E/CD), 325 Broadway, Boulder, CO 80303-3328.

Email: fmb@cdc.noaa.gov

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