dc.creator Rinsland, C. P. en_US dc.creator Devi, V. Malathy en_US dc.creator Flaud, J.- M. en_US dc.creator Camy-Peyret, C. en_US dc.creator Smith, M. A. H. en_US dc.creator Stokes, G. M. en_US dc.date.accessioned 2006-06-15T14:56:12Z dc.date.available 2006-06-15T14:56:12Z dc.date.issued 1985 en_US dc.identifier 1985-TA-2 en_US dc.identifier.uri http://hdl.handle.net/1811/12206 dc.description $^{1}$R. J. Cicerone and J. L. McCrumb, Geophys. Res. Lett. 7 251 (1980). $^{2}$K. Mauersberger, Geophys. Res. Lett. 8, 935 (1981). $^ 3$J. A. Kaye and D. F. Strobel, J. Geophys. Res. 88, 8447 (1983). $^ 4$A. J. Blake, S. T. Gibson, and D. G. McCoy, J. Geophys. Res. 89, 7277 (1984). $^ 5$J. M. Flaud et al., preceding abstract. en_US dc.description Author Institution: NASA Langley Research Center; Physics Department, College of William \& Mary; Laboratoire de Physique Mol\'{e}culaire et d'Optique Atmosph\'{e}rique, CNRS, B\^{a}t. 221, College of William \& Mary; Laboratoire de Physique Mol\'{e}culaire et d'Optique Atmosph\'{e}rique, CNRS, B\^{a}t. 221, College of William \& Mary; Laboratoire de Physique Mol\'{e}culaire et d'Optique Atmosph\'{e}rique, CNRS, B\^{a}t. 221, NASA Langley Research Center; Battelle Observatory, Battelle Pacific Northwest Laboratories en_US dc.description.abstract There has been some controversy concerning the isotopic composition of ozone in the upper stratosphere. Calculations have been reported which indicate that above 40 km, the photodissociation rate of $^{16}0^{18}$ should be considerably larger than for $^{16}0^{16}0$. As a consequence, an enrichment in $^{16}0^{18}0^{16}$ and $^{16}0^{16}0^{18}$ might occur. Although nighttime mass spectroscopic measurements show a peak heavy ozone enhancement of over 40%, $^{2}$ recent calculations indicate that exchange $reactions^{3}$ and a lower $^{16}0^{18}0$ photodissociation $rate^{4}$ should prevent any enhancement. To attempt to resolve the discrepancies among these results, we recorded $0.005 cm^{-1}$ resolution laboratory spectra of pure $^{16}0_{3}$, natural ozone, and $^{18}$O-enriched ozone with the McMath interferometer on Kitt Peak. The data cover $600-1300 cm^{-1}$ Based on the spectroscopic parameters derived from the analysis of these laboratory $spectra,^{5}$ a number of relatively well isolated lines of the $\nu_{3}$ bands of $^{16}0^{18}0^{16}0$ and $^{16}0^{16}0^{18}0$ have been identified in solar absorption spectra recorded with the same interferometer. The analysis of the solar absorption spectra shows a marginally statistically significant enhancement in heavy ozone. Relative to the concentrations in a natural sample of ozone, isotopic abundances of 1.05 $\pm$ 0.07 and 1.11 $\pm$ 0.11 in the total column of atomospheric ozone are derived for $^{16}0^{18}0^{16}0$ and $^{16}0^{16}0^{18}$, respectively. A more sensitive test for heavy ozone enhancement in the upper stratosphere should be possible from high-resolution measurements of the same lines with balloon-borne and satellite-borne instruments. en_US dc.format.extent 182430 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title IDENTIFICATION OF $^{18}$O-ISOTOPIC LINES OF OZONE IN INFRARED GROUND-BASED SOLAR ABSORPTION SPECTRA en_US dc.type article en_US
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