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Development of a compact CO2 sensor open to the atmosphere and based on near-infrared laser technology at 2.68 μm |
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| Authors: | L Joly B Parvitte V Zeninari G Durry |
| Institution: | (1) Groupe de Spectrométrie Moléculaire et Atmosphérique, UMR CNRS 6089, UFR Sciences Exactes et Naturelles, Moulin de la Housse, BP 1039, 51687 Reims Cedex 2, France;(2) IPSL, Service d’Aéronomie, UMR CNRS 7620, 91371 Verrières-le-Buisson Cedex, France |
| Abstract: | We report the development of a field-deployable infrared laser spectrometer using new commercial diode laser technology at 2.68 μm. The instrument is designed to measure in situ CO2 concentrations open to the atmosphere at ground level. Absorption lines were carefully selected around 2.68 μm to minimize interferences from neighboring water vapor transitions. We provide details of the instrument design and data processing. The long term stability of the instrument was evaluated using the Allan variance technique. A preliminary evaluation of the instrument performance was realized by in situ measurements of CO2 concentration on the rooftop of our laboratory. PACS 07.57.Ty; 92.70.Cp |
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