DOAS and scintillation anemometry for the determination of trace gas fluxes and budgets

Werner K. Graber; Markus Furger; Lionel Poggio

doi:10.1117/12.274715

22 May 1997 DOAS and scintillation anemometry for the determination of trace gas fluxes and budgets

Werner K. Graber, Markus Furger, Lionel Poggio

Proceedings Volume 3106, Spectroscopic Atmospheric Monitoring Techniques; (1997) https://doi.org/10.1117/12.274715
Event: Environmental Sensing III, 1997, Munich, Germany

Abstract

A simple layout for a DOAS system based on a commercially available spectrometer with CCD-detector is presented. The open-path light beam over several kilometers is controlled automatically to maintain an optimal beam alignment. The DOAS system is operated in parallel with a scintillation anemometer (scidar), which optically measures the path averaged crosswind. This arrangement provides fluxes of atmospheric constituents under the constrain of homogeneous concentrations along the light paths. In the framework of the EU-project 'VOTALP' 5 combined systems were used to evaluate the budget of NO₂, O₃, formaldehyde, toluene and SO₂ fluxes in the Mesolcina valley in Switzerland. Two scidar/DOAS systems were set up in different heights across the northern end of the valley, two across the southern end and one parallel to the valley sidewall. Beam lengths ranged from 0.6 to 2.7 km. Results of the flux measurements are presented.

Citation Download Citation

Werner K. Graber, Markus Furger, and Lionel Poggio "DOAS and scintillation anemometry for the determination of trace gas fluxes and budgets", Proc. SPIE 3106, Spectroscopic Atmospheric Monitoring Techniques, (22 May 1997); https://doi.org/10.1117/12.274715

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