Blar i forfatter "Triest, Jack"

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    • High-resolution underwater laser spectrometer sensing provides new insights into methane distribution at an Arctic seepage site 

      Jansson, Pär; Triest, Jack; Grilli, Roberto; Ferré, Benedicte; Silyakova, Anna; Mienert, Jurgen; Chappellaz, Jérôme (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-08-13)
      Methane (CH4) in marine sediments has the potential to contribute to changes in the ocean and climate system. Physical and biochemical processes that are difficult to quantify with current standard methods such as acoustic surveys and discrete sampling govern the distribution of dissolved CH4 in oceans and lakes. Detailed observations of aquatic CH4 concentrations are required for a better understanding ...

    • Response time correction of slow-response sensor data by deconvolution of the growth-law equation 

      Dølven, Knut Ola; Vierinen, Juha; Grilli, Roberto; Triest, Jack; Ferré, Benedicte (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-08-11)
      Accurate high-resolution measurements are essential to improve our understanding of environmental processes. Several chemical sensors relying on membrane separation extraction techniques have slow response times due to a dependence on equilibrium partitioning across the membrane separating the measured medium (i.e., a measuring chamber) and the medium of interest (i.e., a solvent). We present a new ...

    • SUB-OCEAN: subsea dissolved methane measurements using an embedded laser spectrometer technology 

      Grilli, Roberto; Triest, Jack; Chappellaz, Jérôme; Calzas, Michel; Desbois, Thibault; Jansson, Pær; Guillerm, Christophe; Ferré, Benedicte; Lechevallier, Loïc; Ledoux, Victor; Romanini, Daniele (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-08-16)
      We present a novel instrument, the Sub-Ocean probe, allowing in situ and continuous measurements of dissolved methane in seawater. It relies on an optical feedback cavity enhanced absorption technique designed for trace gas measurements and coupled to a patent-pending sample extraction method. The considerable advantage of the instrument compared with existing ones lies in its fast response time of ...