IDENTIFICATION OF $^{17}O^{16}O^{16}O$ AND $^{16}O^{17}O^{16}O$ LINE IN INFRARED STRATOSPHERIC SOLAR ABSORPTION SPECTRA,
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Date
1992
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Volume Title
Publisher
Ohio State University
Abstract
The 40\% enrichment in mid-stratospheric mass 50 ($^{16}O^{16}O^{18}O + ^{16}O^{18}O^{16}O$) heavy ozone measured in situ with a mass spectrometer by $Mauoresberger^{1}$ has motivated a large number of laboratory and theoretical investigations as well as additional stratospheric measurement. The stratospheric measurements have confirmed the $^{50}O_{3}$enrichment, varies in magnitude from about 10 to 45\% At the present time, the mechanism producing these $O_{3}$ isotopic enrichments in not understood. In two previous studies, we reported the identification and quantitative analysis of $^{18}O^{16}O^{16}O$ and $^{16}O^{18}O^{16}O$ lines in high-resolution infrared ground-based and stratospheric solar absorption $spectra ^{2,3}$. This work used the extensive set of ozone spectroscopic parameters summarized by Flaud $et al.^{4}$ Based on these results and the spectroscopic parameters for the $v_{3}$ and $v_{1}$ bands of $^{16}O^{17}O^{16}O$ and $^{17}O^{16}O^{16}O$ (presented in the accompanying $paper^{5}$), we have searched for absorption features of these rare isotopes in $0.003-cm^{-1}$ resolution stratospheric solar spectra. A number of lines of the $v_{3}$ bands of $^{16}O^{17}O^{16}O$ and $^{17}O^{16}O^{16}O$ have been identified in the solar spectra. This is the first time that these individual isotopic species have been measured in the Earth’s atmosphere. A quantitative analysis to determine $^{16}O^{17}O^{16}O/O_{3}$ and $^{17}O^{16}O^{16}O/3$ isotopic ratios is in progress.
Description
$^{1}$ K. Maueraberger, Geophys. Res. Lett. 8, 935 (1981). $^{2}$ C. P. Rinsland et al., J. Geophys Res. 90, 10,719 (1985). $^{3}$ A. Goldman et al., J. Geophys. Res. 94, 8467 (1989). $^{4}$ J -M. Flaud et al., Atlas of Ozone Spectral Parameters from microwave to Medium Infrared Academic Press, Boston (1990). $^{5}$ A Perrin et. Al., preceding abstract.
Author Institution: Atmospheric Sciences Division, NASA Langley Research Center; Laboratoire de Physique Moleculaire et Applications, C.N.R.S, Universit\'{e} Pierre et Marie Curie; Department of Physics, College of William and Mary; Department of Physics, University of Denver
Author Institution: Atmospheric Sciences Division, NASA Langley Research Center; Laboratoire de Physique Moleculaire et Applications, C.N.R.S, Universit\'{e} Pierre et Marie Curie; Department of Physics, College of William and Mary; Department of Physics, University of Denver