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Author Sivjee, G. G. ♦ Hamwey, R. M.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ AIRGLOW ♦ EMISSION SPECTRA ♦ HYDROXIDES ♦ ATMOSPHERIC CHEMISTRY ♦ MESOSPHERE ♦ CHEMICAL COMPOSITION ♦ COMPARATIVE EVALUATIONS ♦ ELEMENT ABUNDANCE ♦ LEVELS ♦ NEAR INFRARED RADIATION ♦ POLAR REGIONS ♦ TEMPERATURE GRADIENTS ♦ ABUNDANCE ♦ CHEMISTRY ♦ EARTH ATMOSPHERE ♦ ELECTROMAGNETIC RADIATION ♦ EVALUATION ♦ HYDROGEN COMPOUNDS ♦ INFRARED RADIATION ♦ OXYGEN COMPOUNDS ♦ RADIATIONS ♦ SPECTRA ♦ Auroral, Ionospheric, & Magnetospheric Phenomena- (1992-)
Abstract Intensities (I) and rotational temperatures (T) of the OH(8, 3) and (6, 2) bands were derived from spectrophotometric observations of airglow emissions, over Longyearbyen in Spitsbergen, made in December 1984. The high latitude of the Spitsbergen Observatory (78{degree}15{prime}N) permitted 24-hour coverage of the wintertime polar airglow. These measurements yielded the following results: (1) T derived from P{sub 1} rotational lines of OH depend on the choice of A values (T (Honl-London, A) > (Mies, A) > T); (2) {bar T}(8, 3) = 213 {plus minus} 3 K > {bar T}(6, 2) = 207 {plus minus} 2 K, implying a 3- to 5-K/km temperature gradient in the atmosphere around 85 km height; (3) {bar I}(8, 3) = 314 {plus minus} 30 R and {bar I}(6, 2) = 1,025 {plus minus} 110 R; the corresponding OH(v{prime}) columnar abundances are (5.5 {plus minus} 0.6) {times} 10{sup 8} cm{sup {minus}2} and (8.0 {plus minus} 0.8) {times} 10{sup 8} cm{sup {minus}2} for v{prime} = 8 and v{prime} = 6 vibrational levels. These results are compared with the predictions of a one-dimensional oxygen-hydrogen model which shows that (1) the reaction rate of OH{sup {asterisk}}(v{prime} > 0) + O k{sub 6}/{yields} H + O{sub 2} may be much higher than the laboratory-measured k{sub 6} value for OH(v{prime} = 0); (2) the higher k{sub 6} value accounts for the separation of OH layers for different v{prime} levels observed in various rocket measurements of OH{sup {asterisk}}(v{prime}) profiles and implies a positive temperature gradient in the atmosphere around 85 km; (3) Llewellyn et al.'s (1978) rate for quenching of OH{sup {asterisk}} by M(N{sub 2} and O{sub 2}) is required in the model to match the calculated column abundance of OH{sup {asterisk}} in v{prime} = 8 to the value derived from the observed intensities of the airglow OH(8, 3) band.
ISSN 01480227
Educational Use Research
Learning Resource Type Article
Publisher Date 1987-05-01
Publisher Place United States
Journal Journal of Geophysical Research
Volume Number 92
Issue Number A5


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