AGU Fall 2007 Meeting: Moscone Convention Center, San Francisco, CA
Session GC34A-02
Wednesday, December 12, 2007, 4:20 pm in Moscone West Room 3002
Determination of atmospheric temperature, water vapor, and heating rates from mid- and far-infrared hyperspectral measurements
Feldman,
D
feldman caltech dot edu
Caltech Department of Environmental Science
and Engineering, 1200 E California Blvd. MC 150-21, Pasadena, CA 91125, United
States
Liou, K
UCLA Department of Atmospheric and
Oceanic Sciences, 405 Hilgard Ave Box 951565 7127 Math Sciences Bldg, Los
Angeles, CA 90095, United States
Yung, Y
Division of Geological and Planetary
Sciences, 1200 E California Blvd MC 170-25, Pasadena, CA 91125, United States
Johnson, D
NASA Langley Research Center, NASA
Langley Research Center MS 468, Hampton, VA 23681, United States
Mlynczak, M
NASA Langley Research Center, NASA
Langley Research Center MS 468, Hampton, VA 23681, United States
Comprehensive
satellite-borne far-infrared (15-100 μm) hyperspectral measurements of the earth
have not been implemented since the short-lived Infrared Interferometer
Sounder-D (IRIS-D) instrument on the Nimbus-4 satellite ceased operation in 1971
due primarily to instrumentation limitations and mission cost considerations.
Recently, the development of the Far Infrared Spectroscopy of the Troposphere
(FIRST) instrument [Mlynczak et al, 2006], a balloon-borne FTS which records
spectra from 5 to 200
μm, provides a
test-bed for the development of space-based far-infrared measurements for
climate change monitoring. A comparison of the retrieval capabilities of a
notional space-based instrument of comparable performance to FIRST and the
currently-operational mid-infrared instrument AIRS is presented. Temperature and
water vapor retrievals are compared (in an orbital simulation framework) along
with the relative ability of the retrievals from these two instruments to
constrain the heating rate profile. Also, the skill with which the AIRS
measurements can be used to extrapolate the cloud radiative effect into the
far-infrared is explored. Finally, FIRST test flight spectra are presented in
the framework of other A-Train measurements such as MODIS and CALIPSO, followed
by a discussion of climate applications.
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