MEASUREMENTS OF $O_{3}$ LINE INTENSITIES IN THE $\nu_{3}$ BAND

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1996

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Ohio State University

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To obtain a more comprehensive data set for determination of absolute intensities of ozone lines in the 9-11 $\mu$m region, we have recorded additional high-resolution absorption spectra of ozone at room temperature using the Fourier transform spectrometer at the Mcmath-Pierce facility of the National Solar Observatory at Kitt Peak. As in our previous effort, $^{a}$ the spectrometer was set up in double-pass $mode ^{b}$ to cover the $800-1400 cm^{-1}$ region at $0-0027 cm^{-1}$ resolution. The ozone samples were contained in a glass cell having crossed IR transmitting and UV transmitting paths approximateley 10 cm in each direction. A 254 nm UV-absorption monitor of the same design as Pickett et al. was used to measure the ozone partial pressures, which were kept at approximately 0.3 to 0.5 Torr to prevent the appearance of saturated lines in any region of the band. Four spectra, for which the ozone partial pressure varied by $<$ 1.0 percent during the recording time, were selected for anaylysis. Using our multispectrum nonlinear least-squares procedure, $^{d}$ we have fit these spectra simultaneously to determine intensities for numerous lines in both the $P$ and $R$ branches of the $\nu_{3}$ fundamental band. These results will be compared with other recent $measurements^{eef}$ and with the values on the 1992 HITRAN compilation.

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$^{a}$ M. A. H. Smith, V. Malathy Devi, D. Chris Benner, and C. P. Rinsland, 50th International Symposium on Molecular Spectroscopy, Paper RG02 (1995). $^{b}$ D. E. Jennings, R. Hubbard, and J. W. Brauk, Appl. Opt. 24, 3438 (1985). $^{c}$ H. M. Pickett, D. B. Peterson, and J. S. Margolis, J. Geophys. Res. 97, 20,787-20,793 (1992). $^{d}$ D. Chris Benner, C. P. Rinsland, V. Malathy Devi, M. A. H. Smith, and D. Atkins, JQSRT 53, 705-721 (1995). $^{e}$ M. R. DeBacker and D. Courtosis, 50th international Symposium on Molecular Spectroscopy, Paper RA06 (1995). $^{f}$ M. R. DeBacker, B. Parvitte, V. Zeninari, and D. Courtois, JQSRT 54, 1009-1018 (1995).
Author Institution: Atmospheric Sciences Division, NASA, Langley Research Center; Department of Physics, The College of William and Mary

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