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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union

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doi:10.5194/amt-2016-386
© Author(s) 2016. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
19 Dec 2016
Review status
A revision of this discussion paper is under review for the journal Atmospheric Measurement Techniques (AMT).
Comparison of cavity enhanced optical–feedback laser spectroscopy and gas chromatography for ground-based and airborne measurements of atmospheric CO concentration
Irène Ventrillard1, Irène Xueref-Remy2, Martina Schmidt2,a, Camille Yver Kwok2, Xavier Faïn3, and Daniele Romanini1 1Univ. Grenoble Alpes, CNRS-UMR5588, Laboratoire Interdisciplianire de Physique (LIPhy), Grenoble, France
2Laboratoire des Sciences du Climat et de l’Environnement (LSCE), UMR CEA-CNRS 1572,Gif-sur-Yvette, France
3Univ. Grenoble Alpes, Institut des Géosciences de l’Environnement (IGE), Grenoble, France
anow at: Institut für Umweltphysik (IUP) University Heidelberg, Germany
Abstract. We present the first comparison of carbon monoxide (CO) measurements performed with a portable laser spectrometer that exploits the Optical–Feedback Cavity–Enhanced Absorption Spectroscopy (OF-CEAS) technique, against a high performance automated gas chromatograph (GC) with mercuric oxide reduction gas detector. First, measurements of atmospheric CO mole fraction were continuously collected in Paris (France) suburb over one week. Both instruments showed an excellent agreement within typically 2 ppb (part per billion in volume) fulfilling the World Meteorological Organization (WMO) recommendation for CO inter-laboratory comparison. The compact size and robustness of the OF-CEAS instrument allowed its operation aboard a small aircraft employed for routine tropospheric air analysis over the French Orléans forest area. Direct OF-CEAS real–time CO measurements in tropospheric air were then compared with later analysis of flask samples by the gas chromatograph. Again, a very good agreement was observed. This work establishes that the OF-CEAS laser spectrometer can run unattended at a very high level of sensitivity (< 1 ppb) and stability without any periodic calibration.

Citation: Ventrillard, I., Xueref-Remy, I., Schmidt, M., Yver Kwok, C., Faïn, X., and Romanini, D.: Comparison of cavity enhanced optical–feedback laser spectroscopy and gas chromatography for ground-based and airborne measurements of atmospheric CO concentration, Atmos. Meas. Tech. Discuss., doi:10.5194/amt-2016-386, in review, 2016.
Irène Ventrillard et al.
Irène Ventrillard et al.
Irène Ventrillard et al.

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Short summary
We present a comparison of CO measurements performed with a portable laser spectrometer against a high performance gas chromatograph. For both surface and airborne measurements, the instruments showed an excellent agreement very close to the 2 ppb World Meteorological Organization recommendation for CO inter-laboratory comparison. This work establishes that this laser technique allows for the development of sensitive, compact, robust and reliable instruments for in-situ trace gas analysis.
We present a comparison of CO measurements performed with a portable laser spectrometer against...
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