Blar i forfatter "Röckmann, Thomas"

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    • Diel and seasonal methane dynamics in the shallow and turbulent Wadden Sea 

      de Groot, Tim René; Mol, Anne Margriet; Mesdag, Katherine; Ramond, Pierre; Ndhlovu, Rachel; Engelmann, Julia Catherine; Röckmann, Thomas; Niemann, Helge (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-09-25)
      The Wadden Sea is a coastal system along the fringe of the land–sea borders of Denmark, Germany and the Netherlands. The Wadden Sea is extremely productive and influenced by strong variations in physical and biological forcing factors that act on timescales of hours to seasons. Productive coastal seas are known to dominate the ocean's methane emission to the atmosphere, but knowledge of controls and ...

    • Plastic photodegradation under simulated marine conditions 

      Delre, Annalisa; Goudriaan, Maaike; Morales, Victor Hernando; Vaksmaa, Annika; Rachel Tintswalo, Ndhlovu; Marianne, Baas; Keijzer, Edwin; de Groot, Tim; Zeghal, Emna; Egger, Matthias; Röckmann, Thomas; Niemann, Helge (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-01-12)
      Ocean plastic pollution is a problem of increasing magnitude; yet, the amount of plastic at the sea surface is much lower than expected. Solar ultraviolet (UV) radiation can induce photodegradation, but its importance in determining the longevity of floating plastic remains unconstrained. Here, we measured photodegradation rates of different plastic types slightly larger than microplastics (virgin ...

    • Sources and sinks of methane in sea ice: Insights from stable isotopes 

      Jacques, Caroline; Sapart, Celia J.; Fripiat, François; Carnat, Gauthier; Zhou, Jiayun; Delille, Bruno; Röckmann, Thomas; van der Veen, Carina; Niemann, Helge; Haskell, Tim; Tison, Jean-Louis (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-10-27)
      We report on methane (CH<sub>4)</sub> stable isotope (d<sup>13</sup>C and d<sup>2</sup> H) measurements from landfast sea ice collected near Barrow (Utqiagvik, Alaska) and Cape Evans (Antarctica) over the winter-to-spring transition. These measurements provide novel insights into pathways of CH<sub>4</sub> production and consumption in sea ice. We found substantial differences between the two ...