A portable laser spectrometer for airborne and ground-based remote sensing of geological CO2 emissions

Manuel Queisser, Mike Burton, Graham R. Allan, Antonio Chiarugi

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    Abstract

    LARSS, a 24 kg, suitcase-sized, CW-laser remote-sensing
    spectrometer with a ~2 km range has been developed. It
    demonstrated its flexibility in measuring both
    atmospheric CO2 from an airborne platform and
    terrestrial emission of CO2 from a remote mud-volcano,
    Bledug Kuwu, Indonesia from a ground-based sight. This
    system scans the CO2 absorption line with 20 discrete
    wavelengths as opposed to the typical two wavelength
    online offline instrument. This multi-wavelength
    approach offers an effective quality-control, bias-control
    and confidence-estimate of measured CO2 concentrations
    via spectral fitting. The simplicity, ruggedness and
    flexibility in the design allows for easy transportation,
    use on different platforms with quick setup in some of
    the most challenging climatic conditions. While more
    refinement is needed, the results represent a step-stone
    towards widespread use of active one-sided gas remote
    sensing in the Earth sciences.
    Original languageEnglish
    JournalOptics Letters
    Volume42
    Issue number14
    Early online date21 Jun 2017
    DOIs
    Publication statusPublished - 2017

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