Pressure-broadening coefficients and line strengths of H2O near 1.39μm: application to the in situ sensing of the middle atmosphere with balloonborne diode lasers

Durry, Georges; Zéninari, V.; Parvitte, B.; Barbu, T. Le; Lefèvre, Frank; Ovarlez, J.; Gamache, Robert R.

doi:10.1016/j.jqsrt.2004.09.033

Cited by 39 publications

(26 citation statements)

References 35 publications

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“…The dynamical range of the measurements is four orders of magnitude, allowing observations in both the lower stratosphere and the upper troposphere. The accuracy is estimated to be in the range 5-10%, the figure being confirmed by direct comparison with a frost point hygrometer (Durry et al, 2005). During the HIBISCUS campaign, the µSDLA instrument was flown twice on board short duration stratospheric balloons, (Durry et al, 2006;Pommereau et al, 2007).…”

Section: µSdla Tunable Diode Laser Spectrometermentioning

confidence: 77%

“…Gas concentrations are retrieved from the in-situ absorption spectra using the Beer-Lambert law and a molecular model. H 2 O atmospheric spectra are recorded in the 1.39 µm spectral region (Durry et al, 2005). The technique provides concentrations at high temporal resolution ranging from one to four samples per second, achieving a spatial resolution of the order of ten meters.…”

Section: µSdla Tunable Diode Laser Spectrometermentioning

confidence: 99%

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Evaluation of balloon and satellite water vapour measurements in the Southern tropical and subtropical UTLS during the HIBISCUS campaign

et al. 2009

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Abstract. Balloon water vapour in situ and remote measurements in the tropical upper troposphere and lower stratosphere (UTLS) obtained during the HIBISCUS campaign around 20 • S in Brazil in February-March 2004 using a tunable diode laser (µSDLA), a surface acoustic wave (SAW) and a Vis-NIR solar occultation spectrometer (SAOZ) on a long duration balloon, have been used for evaluating the performances of satellite borne remote water vapour instruments available at the same latitude and measurement period. In the stratosphere, HALOE displays the best precision (2.5%), followed by SAGE II (7%), MIPAS (10%), and SCIAMACHY (35%), all of which show approximately constant H 2 O mixing ratios between 20-25 km. Compared to HALOE of ±10% accuracy between 0.1-100 hPa, SAGE II and SAOZ show insignificant biases, MIPAS is wetter by 10% and SCIAMACHY dryer by 20%. The currently available GOMOS profiles of 25% precision show a positive vertical gradient in error for identified reasons. Compared to these, the water vapour of the Reprobus Chemistry Transport Model, forced at pressures higher than 95 hPa by the ECMWF analyses, is dryer by about 1 ppmv (20%).In the lower stratosphere between 16-20 km, most notable features are the steep degradation of MIPAS precision below 18 km, and the appearance of biases between instruments far larger than their quoted total uncertainty. HALOE and Correspondence to: N. Montoux (nadege.montoux@latmos.ipsl.fr) SAGE II (after spectral adjustment for reducing the bias with HALOE at northern mid-latitudes) both show decreases of water vapour with a minimum at the tropopause not seen by other instruments or the model, possibly attributable to an increasing error in the HALOE altitude registration. Between 16-18 km where the water vapour concentration shows little horizontal variability, and where the µSDLA balloon measurements are not perturbed by outgassing, the average mixing ratios reported by the remote sensing instruments are substantially lower than the 4-5 ppmv observed by the µSDLA. Differences between µSDLA and HALOE and SAGE II (of the order of −2 ppmv), SCIAMACHY, MIPAS and GOMOS (−1 ppmv) and SAOZ (−0.5 ppmv), exceed the 10% uncertainty of µSDLA, implying larger systematic errors than estimated for the various instruments.In the upper troposphere, where the water vapour concentration is highly variable, AIRS v5 appears to be the most consistent within its 25% uncertainty with balloon in-situ measurements as well as ECMWF. Most of the remote measurements show less reliability in the upper troposphere, losing sensitivity possibly because of absorption line saturation in their spectral ranges (HALOE, SAGE II and SCIA-MACHY), instrument noise exceeding 100% (MIPAS) or imperfect refraction correction (GOMOS). An exception is the SAOZ-balloon, employing smaller H 2 O absorption bands in the troposphere.

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Section: µSdla Tunable Diode Laser Spectrometermentioning

confidence: 77%

Section: µSdla Tunable Diode Laser Spectrometermentioning

confidence: 99%

Evaluation of balloon and satellite water vapour measurements in the Southern tropical and subtropical UTLS during the HIBISCUS campaign

et al. 2009

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“…Li and LeRoy estimate that their intensities have an absolute accuracy of about 1% and their new values are still being validated. 34 The new half-widths are based on available experimental and theoretical studies as described in Ref. [231].…”

Section: N 2 (Molecule 22)mentioning

confidence: 99%

“…These new parameters have been tested for different remote-sensing applications and were found to give improved profiles for atmospheric constituents. The algorithm has been improved for the current release of HITRAN: additional measurements of γ air and δ [18,[33][34][35][36][37][38][39] and γ self [18,[38][39][40][41][42][43][44][45] have been added to the measurement databases. Additional data [46,47] have been added to the theoretical database of γ air , n, and δ.…”

mentioning

confidence: 99%

The HITRAN2012 molecular spectroscopic database

Rothman

Gordon

Babikov

et al. 2013

Journal of Quantitative Spectroscopy and Radiative Transfer

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2,973

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“…[14][15][16][17] for laboratory work and Refs. [18,19] for atmospheric studies. In particular, large W-shaped residuals were observed in the analysis of H 2 O lines from the Atmospheric Chemistry Experiment [19], an effect that appears to occur only for H 2 O and not for other molecules in the spectra.…”

Section: Introductionmentioning

confidence: 99%

Recommended isolated-line profile for representing high-resolution spectroscopic transitions (IUPAC Technical Report)

Tennyson

Bernath

Campargue

et al. 2014

Pure and Applied Chemistry

234

106

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Abstract:The report of an IUPAC Task Group, formed in 2011 on "Intensities and line shapes in high-resolution spectra of water isotopologues from experiment and theory" (Project No. 2011-022-2-100), on line profiles of isolated high-resolution rotational-vibrational transitions perturbed by neutral gas-phase molecules is presented. The well-documented inadequacies of the Voigt profile (VP), used almost universally by databases and radiative-transfer codes, to represent pressure effects and Doppler broadening in isolated vibrationalrotational and pure rotational transitions of the water molecule have resulted in the development of a variety of alternative line-profile models. These models capture more of the physics of the influence of pressure on line shapes but, in general, at the price of greater complexity. The Task Group recommends that the partially Correlated quadratic-Speed-Dependent Hard-Collision profile (pCqSD-HCP) should be adopted as the appropriate model for high-resolution spectroscopy. For simplicity this should be called the Hartmann-Tran profile (HTP). The HTP is sophisticated enough to capture the various collisional contributions to the isolated line shape, can be computed in a straightforward and rapid manner, and reduces to simpler profiles, including the Voigt profile, under certain simplifying assumptions.

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Pressure-broadening coefficients and line strengths of H2O near 1.39μm: application to the in situ sensing of the middle atmosphere with balloonborne diode lasers

Cited by 39 publications

References 35 publications

Evaluation of balloon and satellite water vapour measurements in the Southern tropical and subtropical UTLS during the HIBISCUS campaign

Evaluation of balloon and satellite water vapour measurements in the Southern tropical and subtropical UTLS during the HIBISCUS campaign

The HITRAN2012 molecular spectroscopic database

Recommended isolated-line profile for representing high-resolution spectroscopic transitions (IUPAC Technical Report)

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