Blar i Geophysical Institute på forfatter "Alendal, Guttorm"

Viser treff 1-7 av 7

    • Flow over a backward-facing step, a numerical study comparing a zand a σ-coordinate model 

      Rygg, Kristin; Alendal, Guttorm; Haugan, Peter Mosby (Peer reviewed; Journal article, 2011)
      Homogeneous, nonrotating flow over a backward-facing rounded step is simulated using the 2D vertical version of two general circulation models, a z-coordinate model—the Massachusetts Institute of Technology general circulation ...

    • A numerical study of transport and spreading of gases from natural analogues of gas-seepage through the seafloor 

      Enstad, Lars Inge; Alendal, Guttorm; Haugan, Peter Mosby (Peer reviewed; Journal article, 2009-02)
      Natural leakages of CO2 are reported in the literature at mid ocean ridges and CH4 seepages in hydrocarbon rich ares. These could potentially serve as natural analogues of leakages from CO2 storages. In this study we have ...

    • Ocean abyssal carbon experiments at 0.7 and 4 km depth 

      Haugan, Peter Mosby; Brewer, Peter G.; Peltzer, Edward T.; Walz, Peter; Aya, Izuo; Yamane, Kenji; Kojima, Ryuji; Nakajima, Yasuharu; Nakayama, Noriko; Hove, Joakim; Johannessen, Truls; Bellerby, Richard G. J.; Alendal, Guttorm (Journal article, 2005)
      Observations from small-scale (20 to 90 litres) CO2 experiments conducted off the coast of California at 684 m depth and at 3942 m depth are discussed. In both experiments, when the seawater velocity was sufficiently strong, ...

    • Parameterization of drag and dissolution of rising CO2 drops in seawater 

      Gangstø, Reidun; Haugan, Peter Mosby; Alendal, Guttorm (Journal article, 2005-05-24)
      In this work the dynamics and dissolution of a hydratecovered CO2 drop were studied, using a numeric model and data from one of very few CO2 experiments performed in the real ocean. A theory including the standard drag ...

    • PVTx Properties of a Two-phase CO2 Jet from Ruptured Pipeline 

      Botnen, Helle Augdal; Omar, Abdirahman; Aavatsmark, Ivar; Alendal, Guttorm; Johannessen, Truls (Peer reviewed; Journal article, 2013)
      Span and Wagner equation of state (SW EOS) have been used to investigate changes in the thermodynamic properties of CO2 during a depressurization process from a pipeline into marine environment. The process is assumed to ...

    • Topographic effects on CO2, diffusion and dissolution from the seafloor 

      Rygg, Kristin; Enstad, Lars Inge; Alendal, Guttorm; Haugan, Peter Mosby (Peer reviewed; Journal article, 2009-02)
      At 3000 meters depth liquid CO2 is denser than seawater and hence will be stored as a “lake” on the deep ocean floor, which is expected to gradually be dissolved in seawater. Ocean currents and turbulence will influence ...

    • Turbulent diffusion and transport from a CO2 lake in the deep ocean 

      Haugan, Peter Mosby; Alendal, Guttorm (Journal article, 2005-09-21)
      If liquid CO2 is stored as a dense ‘‘lake’’ on the deep ocean floor, it is expected to dissolve in seawater. Ocean currents and turbulence can increase the net rate of CO2 release by several orders of magnitude compared ...