Remote sensing of mass fluxes of trace gases in the boundary layer |
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Authors: | Ch Werner R Haus F Köpp K Schäfer |
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Institution: | (1) Deutsche Forschungsanstalt für Luft- und Raumfahrt, Institute of Optoelectronics, D-82230 Weling, Germany;(2) Fraunhofer-Institute of Atmospheric Environmental Research (IFU), Rudower Chaussee 5, D-12484 Berlin, Germany;(3) Fraunhofer-Institute of Atmospheric Environmental Research (IFU), Kreuzeckbahnstrasse 19, D-82467 Garmisch-Partenkirchen, Germany |
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Abstract: | The combination of remote sensing methods like Doppler lidar and FTIR offers the possibility to determine mass fluxes of gases remotely. Doppler lidar measures the three-dimensional wind vector in the vicinity of diffuse sources or the velocity of air in a chimney plume if an industrial complex is monitored. FTIR is a multi-component remote sensing method for gas concentrations. The Fourier transformation of an interferogram of a Michelson interferometer within a FTIR system converts the recorded intensity (function of optical path length) to a spectral signal (function of wavenumber). Both information, velocity and concentration, give the mass fluxes of the tracer (gas). A first test was performed at Munich-North power station with FTIR and cw-Doppler lidar. Fluxes of CO2, CO, NO, and HC1 were determined. The results are in good agreement with the fluxes measured by in-situ instruments of the power station. The method can be used to control industrial complexes from an outside observation site. |
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Keywords: | 42 68 42 30 |
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