CIRRIS 1A observation of (13)C(16)O and (12)C(18)O fundamental band radiance in the upper atmosphere

Details CIRRIS 1A observation of (13)C(16)O and (12)C(18)O fundamental band radiance in the upper atmosphere CIRRIS 1A observation of (13)C(16)O and (12)C(18)O fundamental band radiance in the upper atmosphere

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20.2683d&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 23, p. 2683-2686

Physics

11

Atmospheric Composition, Carbon Isotopes, Oxygen Isotopes, Radiance, Radiative Transfer, Upper Atmosphere, Algorithms, Climatology, Excitation, Mathematical Models, Space Shuttle Missions, Spectrum Analysis

Scientific paper

Fundamental band emission from the v=1 levels of isotopically substituted (13)C(16)O and (12)C(18)O 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 1A) experiment under both nighttime and daytime conditions. Spectral data between 70 and 150 km tangent height were analyzed in the 4.7 micrometer wavelength region, providing absolute (12)C(16)O, (13)C(16)O and (12)C(18)O column radiances. The minor isotope column radiances are up to 30 times more intense than predicted, based solely on the natural isotopic abundances of (13)C and (18)O. 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.

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