Electromagnetic Theory, Magnetotelluric, Magnetic Anomalies: Modelling And Interpretation, Magnetic Field, Marine Electromagnetics
Marine natural source electromagnetic data acquired on continental margins are often of considerable scientific and commercial interest. However, the large conductivity contrast between the ocean and coast causes this type of data to be severely distorted. For a 2-D coastal model, this distortion is most pronounced for the marine magnetotelluric and geomagnetic response function derived from induced currents flowing parallel to the coast. A maximal distortion occurs for a given period at a specific distance from the coast and causes severe anomalies in the magnitude and phase of the response functions. Based on a modelling study, we empirically relate the characteristic period and characteristic distance to physical parameters such as the ocean depth and the host resistivity. Based on a simple analytical approach, we test these approximations and show that maximum distortion occurs when destructive interference between the ocean and host response is at its highest. While the coast effect causes a large distortion in the marine responses we show through a resolution analysis that it does not mask subsurface conductivity anomalies but in fact increases the sensitivity to the seafloor.
Approximations for the 2-D coast effect on marine magnetotelluric data does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.If you have personal experience with Approximations for the 2-D coast effect on marine magnetotelluric data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Approximations for the 2-D coast effect on marine magnetotelluric data will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1116624