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Evidence of non-LTE Effects in Mesospheric Water Vapor from Spectrally-Resolved Emissions Observed by CIRRIS-1AEvidence 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 to 000) and (020 to 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 x 10(exp -12)cc/s is derived.
Document ID
19990042055
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Zhou, D. K. (Utah State Univ. Logan, UT United States)
Mlynczak, M. G. (NASA Langley Research Center Hampton, VA United States)
Lopez-Puertas, M. (Instituto de Astrofisica de Andalucia Granada, Spain)
Zaragoza, G. (Oxford Univ. Oxford, United Kingdom)
Date Acquired
August 19, 2013
Publication Date
January 1, 1999
Publication Information
Publication: Geophysical Research Letters
Volume: 26
Issue: l 1
ISSN: 0094-8276
Subject Category
Geophysics
Report/Patent Number
Paper-1998GL900233
Funding Number(s)
CONTRACT_GRANT: ESP-96-0623
CONTRACT_GRANT: NAS1-20467
CONTRACT_GRANT: ESP-97-1798
Distribution Limits
Public
Copyright
Other