# TUNABLE DIODE LASER MEASUREMENTS OF INTENSITIES AND AIR-BROADENED HALFWIDTHS OF THE $\nu_{2}$ BAND OF HDO: RESULTS AND THEIR APPLICATION TO THE ANALYSIS OF STRATOSPHERIC SOLAR ABSORPTION SPECTRA

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 dc.creator Rinsland, C. P. en_US dc.creator Goldman, A. en_US dc.creator Devi, V. Malathy en_US dc.creator Fridovich, B. en_US dc.creator Murcray, F. J. en_US dc.creator Murcray, D. G. en_US dc.creator Coffey, M. T. en_US dc.creator Mankin, W. G. en_US dc.date.accessioned 2006-06-15T17:40:41Z dc.date.available 2006-06-15T17:40:41Z dc.date.issued 1984 en_US dc.identifier 1984-MF-10 en_US dc.identifier.uri http://hdl.handle.net/1811/16636 dc.description Author Institution: NASA Langley Research Center; Department of Physics, University of Denver; Department of Physics, College of William and Mary; NOAA/NESDIS, FOB \#4, E/RA21, College of William and Mary; National Center for Atmospheric Research, College of William and Mary en_US dc.description.abstract The first spectroscopic measurements of the D/H ratio in stratospheric water vapor have been derived from an analysis of stratospheric solar absorption spectra recorded near sunset with the balloon-borne $0.02-cm^{-1}$ resolution University of Denver and the aircraft-borne $0.06-cm^{-1}$ resolution NCAR interferometer systems and from laboratory spectra of HDO obtained at NOAA/NESDIS with a tunable diode laser system and a D-enriched sample of water vapor. The results have been obtained from measurements of the absorption of isolated lines of the $\nu_{2}$ bands of $H_{2}O$ and HDO in the atmospheric spectra. The laboratory data were analyzed to determine absolute intensities and air-broadened halfwidths for the HDO lines. Parameters are presented for the 13 HDO lines which are in the 1469 to $1514 cm^{-1}$ region. The balloon-borne measurements indicate a D/H ratio, normalized to the reference value of 158 atomic parts per million of Standard Mean Ocean Water (SMOW), which increases from 0.55 near 18 km to 0.67 at 29 km. The aircraft measurements provide additional evidence for a large depletion in the D content of stratospheric water vapor. The same data sets have also been used to measure stratospheric $CH_{4}$. Within the experimental uncertainties, the changes in the $H_{2}O, HDO$, and $CH_{4}$ mixing ratios with altitude inferred from the balloon spectra are consistent with the hypothesis that these species are coupled in the stratosphere through the oxidation of $CH_{4}$. en_US dc.format.extent 1050224 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title TUNABLE DIODE LASER MEASUREMENTS OF INTENSITIES AND AIR-BROADENED HALFWIDTHS OF THE $\nu_{2}$ BAND OF HDO: RESULTS AND THEIR APPLICATION TO THE ANALYSIS OF STRATOSPHERIC SOLAR ABSORPTION SPECTRA en_US dc.type article en_US