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SME observations of O_2(^1Δ_g) nightglow: An assessment of the chemical production mechanisms

Howell, Colin D. and Michelangeli, Diane V. and Allen, Mark and Yung, Yuk L. (1990) SME observations of O_2(^1Δ_g) nightglow: An assessment of the chemical production mechanisms. Planetary and Space Science, 38 (4). pp. 529-537. ISSN 0032-0633. https://resolver.caltech.edu/CaltechAUTHORS:20140813-080817194

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Abstract

Solar Mesosphere Explorer (SME) observations of the 3 a.m. 1.27 μm nightglow at 45°N latitude, averaged over the period 10–31 July 1984, are reported. From the deduced volume emission rates, we derive the O_2(a^1Δ_g) night-time production rates for the 80–100 km altitude range. Utilizing the mean SME-acquired 3 p.m. ozone profile for the same latitude and time period and an updated photochemical model, we determine night-time O, O_3, H, OH, HO_2, and H_2O_2 profiles. These are used in calculating the rates of reactions which are sufficiently exothermic to produce O_2(^1Δ) or excited states of OH or HO_2, which could transfer their energy to O_2 to form O_2(^1Δ). Of these reactions, most have rates that are quite small compared with the observed night-time O_2(^1Δ) production rate. For several others, laboratory experiments have found O_2(^1Δ) yields which are insufficient for simulating the observed O_2(^1Δ). Using yields of O_2(^1Δ) based on published laboratory and observational studies, we find that the sum of two reaction sequences can approximate the SME measurements: (1) O + O + M and (2) H + O_3 followed by OH^∗ + O_2.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://www.sciencedirect.com/science/article/pii/003206339090145GPublisherArticle
http://dx.doi.org/10.1016/0032-0633(90)90145-GDOIArticle
ORCID:
AuthorORCID
Yung, Yuk L.0000-0002-4263-2562
Alternate Title:SME observations of O2(1Δg) nightglow: An assessment of the chemical production mechanisms
Additional Information:© 1990 Pergamon Press. Received 5 October 1989, Available online 11 October 2002. We gratefully acknowledge assistance received from R. T. Clancy and M. T. Leu. This work was supported by NASA grant NAGW-890 to the University of Colorado and NASA grant NAGW-413 to the California Institute of Technology. C. D. Howell was supported by a California Institute of Technology Summer Undergraduate Research Fellowship.
Funders:
Funding AgencyGrant Number
NASANAGW-890
NASANAGW-413
Caltech Summer Undergraduate Research Fellowship (SURF)UNSPECIFIED
Issue or Number:4
Record Number:CaltechAUTHORS:20140813-080817194
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140813-080817194
Official Citation:Colin D. Howell, Diane V. Michelangeli, Mark Allen, Yung Yuk L., Ronald J. Thomas, SME observations of O2(1Δg) nightglow: An assessment of the chemical production mechanisms, Planetary and Space Science, Volume 38, Issue 4, April 1990, Pages 529-537, ISSN 0032-0633, http://dx.doi.org/10.1016/0032-0633(90)90145-G. (http://www.sciencedirect.com/science/article/pii/003206339090145G)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48469
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:13 Aug 2014 16:09
Last Modified:09 Mar 2020 13:19

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