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SME observations of O2(1 Delta g) nightglow - An assessment of the chemical production mechanismsSolar Mesosphere Explorer (SME) observations of the 3 a.m. 1.27 micron nightglow at 45 N latitude are reported. From the deduced volume emission rates, the O2(a 1 Delta g) nighttime production rates for the 80-100 km altitude range are derived. Utilizing the mean SME-acquired 3 p.m. ozone profile for the same latitude and time period and an updated photochemical model, nighttime O, O3, H, OH, HO2, and H2O2 profiles are determined. These are used in calculating the rates of reactions which are sufficiently exothermic to produce O2(1 Delta) or excited states of OH or HO2, which could transfer their energy to O2 to form O2(1 Delta). Yields of O2(1 Delta) based on published laboratory and observational studies are used to find that the sum of two reaction sequences can approximate the SME measurements: (1) O + O + M and (2) H + O3 followed by OH-asterisk + O2.
Document ID
19900048327
Document Type
Reprint (Version printed in journal)
Authors
Howell, Colin D. (California Inst. of Tech. Pasadena, CA, United States)
Michelangeli, Diane V. (California Inst. of Tech. Pasadena, CA, United States)
Allen, Mark (California Inst. of Tech. Pasadena, CA, United States)
Yung, Yuk L. (California Institute of Technology Pasadena, United States)
Thomas, Ronald J. (Colorado, University Boulder, United States)
Date Acquired
August 14, 2013
Publication Date
April 1, 1990
Publication Information
Publication: Planetary and Space Science
Volume: 38
ISSN: 0032-0633
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: NAGW-890
CONTRACT_GRANT: NAGW-413
Distribution Limits
Public
Copyright
Other