Self-broadened widths and frequency shifts of water vapor lines between 590 and 2400cm−1

Toth, R. A.; Brown, Linda R.; Plymate, C.

doi:10.1016/s0022-4073(97)00144-1

Cited by 90 publications

(89 citation statements)

References 17 publications

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“…Thus the values AE1 in Table 10 indicate that intensities of this kind of lines are indeed in a relatively good agreement on average with previous empirical [22,35] and theoretical [43,44] compilations. The value of R corresponds to the median of scatters given in Fig.…”

supporting

confidence: 85%

“…(3) using spectra with the same H 2 O partial (runs h, i, j) or close enough H 2 O partial pressures (runs d, e, f), so that the self-shifts can be considered identical. In the latter case, the difference in H 2 O pressure of about 2 hPa induces an uncertainty on the airinduced pressure shifts estimated to be of the order of 3 Â 10 À4 cm À1 /atm when considering the mean values of the self-induced shifts parameters reported by Toth [43] or Grossmann [44] in the n 2 band and near 13,500 cm À1 , respectively. This value remains lower than the experimental uncertainties and can therefore be neglected.…”

Section: Article In Pressmentioning

confidence: 96%

“…The assignment of the 3n 2 , n 1 +n 2 and n 2 +n 3 bands was more complicated because of the less known rotational structure of the (1 1 0) and (0 1 1) states and previously unknown (0 3 0) state. Using global variational predictions (available at http://spectra.iao.ru) generated with the potential function [43] and dipole moment function [44] of Partridge and Schwenke (hereafter referred as PS) and on the results of the n 2 +n 3 band analysis from [23,29], 470 lines have been assigned to these three bands. Among them, 28 lines belonging to the 3n 2 band (J max ¼ 9 and K a max ¼ 5) were assigned for the first time, 113 lines belong to the n 1 +n 2 band (J max ¼ 10 and K a max ¼ 6) and 329 lines belong to the n 2 +n 3 Our newly assigned line positions as well as data from Refs.…”

Section: Hmentioning

confidence: 99%

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Fourier transform measurements of water vapor line parameters in the 4200–6600cm−1 region

Jenouvrier

Daumont

Régalia-Jarlot

et al. 2007

Journal of Quantitative Spectroscopy and Radiative Transfer

126

115

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New high-resolution water vapor absorption spectra were obtained at room temperature in the 4200-6600 cm À1 spectral region by combining Fourier transform spectrometers (FTS) with single and multiple reflection cells. With absorption paths from 0.3 to 1800 m in pure and air diluted water vapor, accurate measurements of about 10400 lines in an intensity range from 10 À29 to 10 À19 cm/molecule have been performed. Positions, intensities, self-and air-broadening coefficients and air-induced shifts were determined for the H 2 16 O, H 2 17 O, H 2 18 O and HDO isotopologues. The rovibrational assignment of the observed lines was performed with the use of global variational predictions and allowed the identification of several new energy levels. One major contribution of this work consists of the identification of 3280 new weak lines. A very close agreement between the new measured parameters and those listed in the database is reported as well as between the observations and the most recent variational calculations for the positions and the intensities. The present parameters provide an extended and homogeneous data set for water vapor, which is shown to significantly improve the databases for atmospheric applications, especially in the transmission windows on both sides of the band centered at 5400 cm À1 .

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confidence: 85%

Section: Article In Pressmentioning

confidence: 96%

Section: Hmentioning

confidence: 99%

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Fourier transform measurements of water vapor line parameters in the 4200–6600cm−1 region

Jenouvrier

Daumont

Régalia-Jarlot

et al. 2007

Journal of Quantitative Spectroscopy and Radiative Transfer

126

115

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“…This fact as well as the almost ideal slope s of the correlation line (s = 0.996, R = 0.99) indicate that the spectroscopic parameters used for the retrieval of both the DIAL and the FTIR instrument are highly consistent. Quantitative spectroscopy of the molecular line parameters was derived independently for FTIR by Toth et al (1998); Toth (1998Toth ( , 2000, and, for the DIAL by Ponsardin and Browell (1997), respectively. The agreement (Fig.…”

Section: Discussionmentioning

confidence: 99%

Intercomparison of atmospheric water vapor soundings from the differential absorption lidar (DIAL) and the solar FTIR system on Mt. Zugspitze

et al. 2011

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Abstract. We present an intercomparison of three years of measurements of integrated water vapor (IWV) performed by the mid-infrared solar FTIR (Fourier Transform Infra-Red) instrument on the summit of Mt. Zugspitze (2964 m a.s.l.) and by the nearby near-infrared differential absorption lidar (DIAL) at the Schneefernerhaus research station (2675 m a.s.l.). The solar FTIR was shown to be one of the most accurate and precise IWV sounders in recent work (Sussmann et al., 2009) and is taken as the reference here. By calculating the FTIR-DIAL correlation (22 min coincidence interval, 15 min integration time) we derive an almost ideal slope of 0.996 (10), a correlation coefficient of R = 0.99, an IWV intercept of −0.039 (42) mm (−1.2 % of the mean), and a bias of −0.052 (26) mm (−1.6 % of the mean) from the scatter plot. By selecting a subset of coincidences with an optimum temporal and spatial matching between DIAL and FTIR, we obtain a conservative estimate of the precision of the DIAL in measuring IWV which is better than 0.1 mm (3.2 % of the mean). We found that for a temporal coincidence interval of 22 min the difference in IWV measured by these two systems is dominated by the volume mismatch (horizontal distance: 680 m). The outcome from this paper is twofold: (1) the IWV soundings by FTIR and DIAL agree very well in spite of the differing wavelength regions with different spectroscopic line parameters and retrieval algorithms used. (2) In order to derive an estimate of the precision of state-of-the-art IWV sounders from intercomparison experiments, it is necessary to use a temporal matching on time scales shorter than 10 min and a spatial matching on the 100-m scale.

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“…In a recent study (1), we presented an extensive listing of the self-broadening parameters of water vapor covering the 600 -2300 cm Ϫ1 region. In the present work, the self-broadening values (1) were used in the analyses in order to obtain accurate values of linewidths and pressure-induced frequency shifts for air-and N 2 -broadening measurements.…”

Section: Introductionmentioning

confidence: 99%

Air- and N2-Broadening Parameters of Water Vapor: 604 to 2271 cm−1

Toth¹

2000

Journal of Molecular Spectroscopy

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Self-broadened widths and frequency shifts of water vapor lines between 590 and 2400cm−1

Cited by 90 publications

References 17 publications

Fourier transform measurements of water vapor line parameters in the 4200–6600cm−1 region

Fourier transform measurements of water vapor line parameters in the 4200–6600cm−1 region

Intercomparison of atmospheric water vapor soundings from the differential absorption lidar (DIAL) and the solar FTIR system on Mt. Zugspitze

Air- and N2-Broadening Parameters of Water Vapor: 604 to 2271 cm−1

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