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  • stratosphere  (2)
  • Fourier transform infrared spectroscopy  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Line positions and intensities in theν 2 band of D2O improvied pumped D2O laser frequencies (1985)
    Springer
    International journal of infrared and millimeter waves 6 (1985), S. 199-233 
    Details
    ISSN: 1572-9559
    Keywords: Fourier transform infrared spectroscopy ; Deuterated water vapor ; Laser frequencies
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using high resolution Fourier transform spectra, thev 2 band of D2O has been analysed leading to an extensive and precise set of rotational energy levels of the (0 1 0) vibrational state. These levels are reproduced very satisfactorily with a Watson type Hamiltonian and precise rotational constants as well as the band centerv 2 = 1178.3789 ± 0.0005 cm-1 are determined. A total of 61 line intensities were measured, much attention being paid to a possible contamination of the D2O sample by HDO. A least squares fit of the intensity data has provided us with an expansion of the transition moment operator of thev 2 band from which the first derivative $$\left( {\frac{{\partial ^x \mu }}{{\partial q_2 }}} \right)_e $$ = 0.1690 ± 0.0030 D has been deduced. Finally the complete synthetic spectrum of this band has been computed. All these results have been used to derive improved frequencies for the known pumped and far-infrared laser lines of D2O and to predict new possible coincidences with the available CO2 laser lines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01010358
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Stratospheric N2O5, CH4, and N2O profiles from IR solar occultation spectra (1993)
    Springer
    Journal of atmospheric chemistry 16 (1993), S. 31-40 
    Details
    ISSN: 1573-0662
    Keywords: Atmospheric composition ; middle atmosphere ; stratosphere ; Fourier transform spectroscopy ; balloon measurements ; nitrogen oxydes ; methane
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract Stratospheric volume mixing ratio profiles of N2O5, CH4, and N2O have been retrieved from a set of 0.052 cm−1 resolution (FWHM) solar occultation spectra recorded at sunrise during a balloon flight from Aire sur l'Adour, France (44° N latitude) on 12 October 1990. The N2O5 results have been derived from measurements of the integrated absorption by the 1246 cm−1 band. Assuming a total intensity of 4.32×10−17 cm−1/molecule cm−2 independent of temperature, the retrieved N2O5 volume mixing ratios in ppbv (parts per billion by volume, 10−9), interpolated to 2 km height spacings, are 1.64±0.49 at 37.5 km, 1.92±0.56 at 35.5 km, 2.06±0.47 at 33.5 km, 1.95±0.42 at 31.5 km, 1.60±0.33 at 29.5 km, 1.26±0.28 at 27.5 km, and 0.85±0.20 at 25.5 km. Error bars indicate the estimated 1-σ uncertainty including the error in the total band intensity (±20% has been assumed). The retrieved profiles are compared with previous measurements and photochemical model results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00696622
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Intercomparison of remote measurements of stratospheric NO and NO2 (1990)
    Springer
    Journal of atmospheric chemistry 10 (1990), S. 111-144 
    Details
    ISSN: 1573-0662
    Keywords: NO ; NO2 ; intercomparison ; remote ; balloon ; stratosphere
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract During the 1982 and 1983 Balloon Intercomparison Campaigns, the vertical profile of stratospheric NO2 was measured remotely by nine instruments and that of NO by two. Total overhead columns were measured by two more instruments. Between 30 and 35km, where measurements overlapped, agreement between NO profiles was within ±30%, which is better than the accuracies claimed by the experimenters. Between 35 and 40km there was similarly good agreement between NO2 profiles, but below 30km, differences of greater than a factor three were found. In the second Campaign, NO2 values from most instruments agreed within their quoted errors, except that the Oxford radiometer gave much lower values; but the first Campaign and the column measurements show a more uniform spread of results. These differences below 30km could not be resolved, but new laboratory measurements are planned which should do so.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00054853
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    Paper (German National Licenses)
    Fulltext
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