Stratospheric measurements of collision-induced absorption by molecular oxygen

Details Stratospheric measurements of collision-induced absorption by molecular oxygen Stratospheric measurements of collision-induced absorption by molecular oxygen

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87.3119r&link_type=abstract

Journal of Geophysical Research, vol. 87, Apr. 20, 1982, p. 3119-3122. NASA-NSF-supported research.

Physics

22

Absorption Spectra, Balloon-Borne Instruments, Molecular Collisions, Oxygen, Solar Spectra, Stratosphere, Absorptivity, Interferometry, Line Spectra, Vibrational Spectra

Scientific paper

High-resolution stratospheric solar absorption spectra recorded at sunset with a balloon-borne interferometer, from an altitude of 33 km, are used in a study of collision-induced absorption by the fundamental vibration-rotation band of O2, whose continuum has been identified in the 1400-1700/cm region in spectra obtained at tangent altitudes below 22 km. It is found that transmittance measurements in intervals free of atmospheric line absorption agree with values calculated with the O2 absorption coefficients of Timofeyev and Tonkov (1978), and that the measurements indicate a 20% upper limit for the uncertainty of the available O2 absorption coefficients at lower stratospheric temperatures, on the order of 220 K.

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