• Assuring the integrity of offshore carbon dioxide storage 

      Connelly, D.P.; Bull, J.M.; Flohr, A.; Schaap, A.; Koopmans, D.; Blackford, J.C.; White, P.R.; James, R.H.; Pearce, C.; Lichtschlag, A.; Achterberg, E.P.; de Beer, D; Roche, B.; Li, J.; Saw, K.; Alendal, Guttorm; Avlesen, Helge; Brown, R.; Borisov, S.M.; Böttner, C.; Cazenave, P.W.; Chen, B.; Dale, A.W.; Dean, M.; Dewar, M.; Esposito, M.; Gros, J.; Hanz, R.; Haeckel, M.; Hosking, B.; Huvenne, V.; Karstens, Jens; Le Bas, T.; Leighton, T.G.; Linke, P.; Loucaides, S.; Matter, J.M.; Monk, S.; Mowlem, M.C.; Oleynik, Anna; Omar, Abdirahman; Peel, K.; Provenzano, G.; Saleem, U.; Schmidt, M.; Schramm, B.; Sommer, S.; Strong, J.; Suarez, I. Falcon; Ungerboeck, B.; Widdicombe, S.; Wright, H.; Yakushev, Evgeniy (Journal article; Peer reviewed, 2022)
      Carbon capture and storage is a key mitigation strategy proposed for keeping the global temperature rise below 1.5 °C. Offshore storage can provide up to 13% of the global CO2 reduction required to achieve the Intergovernmental ...
    • Impact and detectability of hypothetical CCS offshore seep scenarios as an aid to storage assurance and risk assessment 

      Blackford, Jerry; Alendal, Guttorm; Avlesen, Helge; Brereton, Ashley; Cazenave, Pierre W; Chen, Baixin; Dewar, Marius; Holt, Jason; Phelps, Jack (Journal article; Peer reviewed, 2020)
      Carbon Capture and Storage has the potential to make a significant contribution to the mitigation of climate change, however there is a regulatory and societal obligation to demonstrate storage robustness and minimal local ...
    • Layout of CCS monitoring infrastructure with highest probability of detecting a footprint of a CO2 leak in a varying marine environment 

      Hvidevold, Hilde Kristine; Alendal, Guttorm; Johannessen, Truls; Ali, Alfatih Omer Mohammed Ahmed; Mannseth, Trond; Avlesen, Helge (Peer reviewed; Journal article, 2015-04-04)
      Monitoring of the marine environment for indications of a leak, or precursors of a leak, will be an intrinsic part of any subsea CO2 storage projects. A real challenge will be quantification of the probability of a given ...
    • Simulating spatial and temporal varying CO2 signals from sources at the seafloor to help designing risk-based monitoring programs 

      Ali, Alfatih Omer Mohammed Ahmed; Frøysa, Håvard G; Avlesen, Helge; Alendal, Guttorm (Peer reviewed; Journal article, 2016-01)
      Risk-based monitoring requires quantification of the probability of the design to detect the potentially adverse events. A component in designing the monitoring program will be to predict the varying signal caused by an ...
    • Stratified flow over complex topography: A model study of the bottom drag and associated mixing 

      Seim, Knut Sponheim; Fer, Ilker; Avlesen, Helge (Peer reviewed; Journal article, 2012-02)
      The flow of stratified fluid over complex topography may lead to a significant drag on the fluid, exerted by the bottom obstacles. Using a 2-m resolution, three-dimensional, non-hydrostatic numerical ocean model, the drag ...
    • Topographic effects on buoyancy driven flows along the slope 

      Berntsen, Jarle Peder; Chiche, Elin Maria Kristina Darelius; Avlesen, Helge (Journal article; Peer reviewed, 2022)
      The flow and descent of dense water masses formed in shallow regions of the ocean is an important leg in the global overturning circulation. The dense overflow waters tend to flow along the continental slopes as geostrophically ...