Physics
Scientific paper
Jan 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26...67z&link_type=abstract
Geophysical Research Letters, Volume 26, Issue 1, p. 67-70
Physics
10
Atmospheric Composition And Structure: Middle Atmosphere-Composition And Chemistry, Atmospheric Composition And Structure: Instruments And Techniques, Atmospheric Composition And Structure: Transmission And Scattering Of Radiation
Scientific paper
Evidence of non-LTE effects in mesospheric water vapor as determined by infrared spectral emission measurements taken from the space shuttle is reported. A cryogenic Michelson interferometer in the CIRRIS-1A shuttle payload yielded high quality atmospheric infrared spectra. These measurements demonstrate the enhanced daytime emissions of H2O(020->010) which are the result of non-LTE processes and in agreement with non-LTE models. The radiance ratios of H2O(010->000) and (020->010) Q(1) transitions during daytime are compared with non-LTE model calculations to assess the vibration-to-vibration exchange rate between H2O and O2 in the mesosphere. An exchange rate of 1.2×10-12cm3s-1 is derived.
Lopez-Puertas Manuel
Mlynczak Martin G.
Zaragoza Guillermo
Zhou Daniel K.
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