IMPROVED LINE PARAMETERS FOR OZONE BANDS IN THE 4.8 AND $10 \mu m$ SPECTRAL REGIONS
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Date
1989
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Publisher
Ohio State University
Abstract
In the present work, we report improved line parameters generated for ozone absorption bands in the 4.8 and $10 \mu m$ spectral regions. These parameters have been obtained by combining the results of recent analyses of room temperature laboratory absorption spectra of natural and $^{18}O$. enriched ozone samples recorded at either 0.005 or $0.010 cm^{-1}$ resolution with the Fourier transform spectrometer operated on Kitt Peak by the National Solar Observatory. All of the parameters for the 4.8 and $10 \mu m$ bands have been updated as compared to those on the 1986 HITRAN compilation. In the $10 \mu m$ region, the results reported by Flaud $et al.^{1.2}$ and Camy-Peyret $et al.^{3}$ have been used to compute positions, intensities, and lower state energies for the $\nu_{1}$ and $\nu_{3}$ bands of the $^{16}O_{3}, ^{16}O^{15}O^{18}O$, and $^{16}O^{18}O^{16}O$ isotopic species. The corresponding parameters for the $\nu_{2}+\nu_{3}-\nu_{2}, \nu_{1}+\nu_{2}-\nu_{2}, 2\nu_{3}-\nu_{3}, \nu_{1}+\nu_{3}-\nu_{1}$, and $2\nu_{1}-\nu_{3}$ hot bands of $^{16}O_{3}$ were calculated using energy levels derived from studies of the 4.8, 5.7, and $14.3 \mu m$ spectral regions. The $2\nu_{1}-\nu_{3}$ band has been calculated for the first time; it is unexpectedly strong, with numerous lines observable between 1100 and $1250 cm^{-1}$. In the $4.8 \mu m$ region, the positions, intensities, and lower state energies of the $2\nu_{1}, \nu_{1}+\nu_{3}$, and $2\nu_{3}$ bands of $^{16}O_{3}$ were taken from Ref. 4. Corresponding parameters for the $\nu_{2}+2\nu_{3}-\nu_{2}, \nu_{1}+\nu_{2}+\nu_{3}-\nu_{2}$, and $2\nu_{1}+\nu_{2}-\nu_{2}$ hot bands of $^{16}O_{3}$ were calculated using energy levels determined from analysis of the 3.6 and $14.3 \mu m$ spectral regions. For all bands, air-broadening coefficients at 296 K were calculated from a polynomial in $J^{\ast}$ derived by fitting air-broadening measurements of individual lines in the $\nu_{1}$ and $\nu_{3}$ bands of $^{16}O_{3}^{5}$. Self-broadening coefficients at 296 K were calculated from a similar fit to the measurements reported by Smith et al.$^{5}$ The new ozone line parameters yield considerable improvement in the accuracy of high resolution atmospheric transmission and emission calculations in 4.8 and $10 \mu m$ regions. Simulations generated with the new line parameters are compared with the laboratory spectra and 0.003 cm-1 resolution solar occulation spectra of the stratosphere to illustrate the quality of the new line parameters.
Description
$^{1}$ J.-M. Flaud et al., J. Mol. Spectrosc. 118, 334-344 (1986). $^{2}$ J.-M. Flaud et al., J. Mol. Spectrosc. 124, 209-217 (1987). $^{3}$ C. Camy-Peyret et al., J. Mol. Spectrosc. 118, 345-354 (1986). $^{4}$ C. P. Rinsland et al., J. Mol. Spectrosc. 130, 204-212 (1988). $^{5}$ M. A. H. Smith et al., J. Opt. Soc. Am. B 5, 585-592 (1988). $^{6}$ M. A. H. Smith et al., this session.
Author Institution: Atmospheric Sciences Division, NASA Langley Research Center; Department of Physics, College of William and Mary; Laboratoire de Physique Mol\'eculaire et Atmosph\'erique, Tour 13 Universit\'e Pierre and Marie Curie et CNRS; Department of Physics, University of Denver
Author Institution: Atmospheric Sciences Division, NASA Langley Research Center; Department of Physics, College of William and Mary; Laboratoire de Physique Mol\'eculaire et Atmosph\'erique, Tour 13 Universit\'e Pierre and Marie Curie et CNRS; Department of Physics, University of Denver