CIRRIS 1A Observation of 13C16O and 12C18O Fundamental Band Radiance in the Upper Atmosphere

Fundamental band emission from the v=1 levels of isotopically substituted 13C16O and 12C18O has been observed for the first time in the earth's atmosphere. High-resolution earthlimb spectra were obtained in the Cryogenic Infrared Radiance Instrumentation for Shuttle (CIRRIS IA) experiment under...

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Bibliographic Details
Main Authors: Dodd, J A, Winick, J R, Blumberg, W A, Lipson, S J, Armstrong, P S
Format: Report
Language:English
Subjects:
AIRGLOW
ALGORITHMS
Atmospheric Physics
ATMOSPHERICS
CARBON MONOXIDE
CIRRIS-1A(CRYOGENIC INFRARED INSTRUMENTATION)
CLIMATOLOGY
CRYOGENICS
EMISSION
EMISSION SPECTRA
EXCITATION
HEIGHT
INFRARED RADIATION
INSTRUMENTATION
LINE OF SIGHT
Optics
PE61102F
RADIANCE
REPRINTS
SPACE SHUTTLES
SPECTRA
TEST AND EVALUATION
UPPER ATMOSPHERE
WUPL2303EP1
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Summary:Fundamental band emission from the v=1 levels of isotopically substituted 13C16O and 12C18O has been observed for the first time in the earth's atmosphere. High-resolution earthlimb spectra were obtained in the Cryogenic Infrared Radiance Instrumentation for Shuttle (CIRRIS IA) experiment under both nighttime and daytime conditions. Spectral data between 70 and 150 km tangent height were analyzed in the 4.7 microns wavelength region, providing absolute 12C16O, 13C16O and 12C18O column radiances. The minor isotope column radiances are up to 30 times more intense than predicted, based solely on the natural isotopic abundances of 13C and 18O. The derived line-of-sight radiances were accurately modeled using the Phillips Laboratory Atmospheric Radiance Code, and provide a strong test of radiative transport and excitation algorithms, as well as model climatologies. Infrared emissions, Carbon monoxide, Airglow, CIRRIS 1A, Fundamental band. Pub. in Geophysical Research Letters, v20 n23 p2683-2686, 14 Dec 1993.