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.
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.
the Creative Commons Attribution 4.0 License.
Research article
| 
19 Nov 2025
Research article |
| 19 Nov 2025
| 19 Nov 2025
Modeling water column gas transformation, migration and atmospheric flux from seafloor seepage
Department of Geosciences, UiT The Arctic University of Norway, Tromsø, Norway
Department of Electrical Engineering, UiT The Arctic University of Norway, Narvik, Norway
Håvard Espenes
Ocenaography section, Akvaplan-niva, Tromsø, Norway
SINTEF Ocean, Trondheim, Norway
Alfred Hanssen
Department of Geosciences, UiT The Arctic University of Norway, Tromsø, Norway
Muhammed Fatih Sert
Department of Geosciences, UiT The Arctic University of Norway, Tromsø, Norway
Magnus Drivdal
Ocenaography section, Akvaplan-niva, Tromsø, Norway
Achim Randelhoff
Ocenaography section, Akvaplan-niva, Tromsø, Norway
Bénédicte Ferré
Department of Geosciences, UiT The Arctic University of Norway, Tromsø, Norway
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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.
We modeled how gas seeping from the seafloor spreads in the ocean and how much reaches the...
