Erlangen 2018 – wissenschaftliches Programm
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UP: Fachverband Umweltphysik
UP 2: Atmosphere - trace gases, Methods - remote sensing
UP 2.3: Vortrag
Montag, 5. März 2018, 11:30–11:45, G 1.011
Methane retrieval and interpretation using high spatial resolution hyperspectral radiances obtained by aircraft measurements — •Jakob Borchardt, Konstantin Gerilowski, Sven Krautwurst, Michael Buchwitz, Thomas Krings, Heinrich Bovensmann, and John P. Burrows — Institute of Environmental Physics, University of Bremen, P.O. 330440, 28334 Bremen, Germany
Methane (CH4) is an important greenhouse gas whose sources and sinks on regional scale are not well quantified. Science grade hyperspectral imaging spectrometers allow for source attribution with high spatial resolution ( 4 × 4 m2). The quantitative retrieval of methane (CH4) total column variations with the "Weighting Function Modified - DOAS" algorithm (WFM-DOAS) originally developed for medium to high spectral resolution instruments ( 1nm) was successfully applied to the lower spectral resolution (≥ 5.5 nm) hyperspectral data. One source under investigation was a coal mine ventilation shaft located in the Four Corners region, which is known for it’s high CH4 emissions. In this talk, the adaptation of the WFM-DOAS algorithm to imaging spectroscopy measurements and the flux inversion using a mass balance approach for that source will be presented. Also a qualitative comparison with measurements taken with a commercial off-the-shelf hyperspectral sensor over coal mine ventilation shafts in silesia will be shown.