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Atomic oxygen in the mesosphere and lower thermosphere derived from SABER: Algorithm theoretical basis and measurement uncertainty
NASA Langley Research Center, Hampton.
Science Systems and Applications Inc., Hampton.
Science Systems and Applications Inc., Hampton.
G & A Technical Software, Newport News.
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2013 (English)In: Journal of Geophysical Research - Atmospheres, ISSN 2169-897X, E-ISSN 2169-8996, Vol. 118, no 11, p. 5724-5735Article in journal (Refereed) Published
Abstract [en]

Atomic oxygen (O) is a fundamental component in chemical aeronomy of Earth's mesosphere and lower thermosphere region extending from approximately 50 km to over 100 km in altitude. Atomic oxygen is notoriously difficult to measure, especially with remote sensing techniques from orbiting satellite sensors. It is typically inferred from measurements of the ozone concentration in the day or from measurements of the Meinel band emission of the hydroxyl radical (OH) at night. The Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) instrument on the NASA Thermosphere-Ionosphere-Mesosphere Energetics and Dynamics (TIMED) satellite measures OH emission and ozone for the purpose of determining the O-atom concentration. In this paper, we present the algorithms used in the derivation of day and night atomic oxygen from these measurements. We find excellent consistency between the day and night O-atom concentrations from daily to annual time scales. We also examine in detail the collisional relaxation of the highly vibrationally excited OH molecule at night measured by SABER. Large rate coefficients for collisional removal of vibrationally excited OH molecules by atomic oxygen are consistent with the SABER observations if the deactivation of OH(9) proceeds solely by collisional quenching. An uncertainty analysis of the derived atomic oxygen is also given. Uncertainty in the rate coefficient for recombination of O and molecular oxygen is shown to be the largest source of uncertainty in the derivation of atomic oxygen day or night.

Place, publisher, year, edition, pages
2013. Vol. 118, no 11, p. 5724-5735
National Category
Aerospace Engineering
Research subject
Atmospheric science
Identifiers
URN: urn:nbn:se:ltu:diva-9635DOI: 10.1002/jgrd.50401ISI: 000325212600037Scopus ID: 2-s2.0-84880283435Local ID: 84bd2485-9096-4723-8336-80dbfffcbc7aOAI: oai:DiVA.org:ltu-9635DiVA, id: diva2:982573
Note

Upprättat; 2013; 20150217 (ninhul)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2019-05-14Bibliographically approved

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Martin-Torres, Javier

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