Ocean Science
Ocean Science
OS
Articles | Volume 21, issue 6
Articles | Volume 21, issue 6
https://doi.org/10.5194/os-21-3031-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-21-3031-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 21, issue 6
Research article
 | 
19 Nov 2025
Research article |  | 19 Nov 2025

Modeling water column gas transformation, migration and atmospheric flux from seafloor seepage

Knut Ola Dølven, Håvard Espenes, Alfred Hanssen, Muhammed Fatih Sert, Magnus Drivdal, Achim Randelhoff, and Bénédicte Ferré

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Short summary
We modeled how gas seeping from the seafloor spreads in the ocean and how much reaches the atmosphere. Using gas-exchange and hydrodynamic models, we estimated gas dissolution, atmospheric release, and 3D concentration fields. Applied to a methane seep offshore Norway, most methane dissolved and much was consumed by microbes, though uncertainties remain due to microbial and mixing assumptions.
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