Three-dimensional electrical conductivity of the world ocean and seabed sediments: effect on EM induction responses
- ETH Zürich, Institute of Geophysics, Zurich, Switzerland (agrayver@erdw.ethz.ch)
This work presents global 3-D electrical conductivity atlas of the world ocean and seabed sediments. Ocean salinity and temperature data were converted to electrical conductivity by solving a thermodynamic equation of state of seawater. A sediment compaction model was used to estimate the depth-dependent electrical conductivity of the seabed sediments. Electromagnetic responses in a wide period band, including typical ranges used in CSEM, MT and Global studies, are significantly affected by varying ocean and sediments conductivity. Incorporating this information in a model prior to inversion helps avoid artifacts and improve data fit. The atlas is openly available along with a concise and easy to use Python toolbox.
How to cite: Grayver, A.: Three-dimensional electrical conductivity of the world ocean and seabed sediments: effect on EM induction responses, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-13412, https://doi.org/10.5194/egusphere-egu21-13412, 2021.
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