The Relation of Seafloor Voltages to Ocean Transports in North Atlantic Circulation Models: Model Results and Practical Considerations for Transport Monitoring*

Flosadóttir, Á. H.; Larsen, Jimmy C.; Smith, J. Torquil

doi:10.1175/1520-0485(1997)027<1547:trosvt>2.0.co;2

Cited by 16 publications

(14 citation statements)

References 33 publications

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“…Linear relationship between the submarine voltage data and the water transport was also reported by Kim et al (2004) and Nilsson et al (2007). Flosadóttir et al (1997) show that the relationship between voltage and cross-cable transport uctuations can be remarkably linear over long distances. Thomson et al (1995) report voltage variations across an undersea cable that have time associations with the tsunami produced by the Cape Mendocino earthquake of 1992.…”

Section: Introductionsupporting

confidence: 65%

“…Another complication is the extraction of the electric signals due to tsunami ow from the measured cable data. The biases in the voltages caused by electrochemical processes at cable-ocean contact (Flosadóttir et al, 1997) can add noise to the measured data. In addition, the electric elds due to external (ionospheric and magnetospheric) sources or/and motional induction from other types of ocean ow (say, ocean circulation and tides) can also be present in the cable data (Larsen, 1980(Larsen, , 1992.…”

Section: Discussionmentioning

confidence: 99%

“…Motional induction is sensitive to the movement of the entire water column (Flosadóttir et al, 1997) and offer an alternative way of monitoring ocean ow. Secondary electric and magnetic elds are induced when electrically conductive ocean water moves across the ambient geomagnetic eld (Sanford, 1971).…”

Section: Introductionmentioning

confidence: 99%

“…Many of these cable systems are made of optical bers. However, Sigray et al (2004), Medford et al (1989) and Flosadóttir et al (1997) discuss various methods to measure voltage across an undersea optical cable system. It would, thus be interesting to predict the voltage variations across the network of cables in Indian Ocean due to the motional induction by tsunami.…”

Section: Introductionmentioning

confidence: 99%

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Can undersea voltage measurements detect tsunamis?

et al. 2010

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The movement of electrically conducting ocean water in the ambient geomagnetic eld induces secondary electric and magnetic elds in the oceans. Ocean water transport is now routinely inferred from undersea cable voltage data. We try to answer the question whether the method could also be useful to detect tsunami. A barotropic shallow water model along with a three-dimensional electromagnetic induction code was used to predict the electric elds induced by the Indian Ocean Tsunami occurred on December 26, 2004. We show that the ocean ow related to the Indian Ocean Tsunami must have induced electric voltages of the order of ±500 mV across the existing submarine cables in the Indian Ocean. The electric elds induced by the Tsunami ow have strength within the range of ±10 mV/km, with enhancements along the main ow region and near the coasts and islands. Thus, making use of the in-service or retired submarine cables to measure the electric potential across oceans, it may be possible to detect water movement related to tsunami.

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Section: Introductionsupporting

confidence: 65%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Can undersea voltage measurements detect tsunamis?

et al. 2010

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“…The full, 3D version of equation (12) was used by Flosadottir et al [1997aFlosadottir et al [ , 1997b to model the oceaninduced electric field in the North Atlantic. We shall solve equation (12) for the entire globe.…”

Section: Electric Fieldmentioning

confidence: 99%

Variability of the ocean‐induced magnetic field predicted at sea surface and at satellite altitudes

Glazman

Golubev

2005

J. Geophys. Res.

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[1] Spatial and temporal variability of the magnetic field component induced by ocean circulation is investigated on the basis of a standard thin-shell approximation of electro-and magneto-static equations. Well-known difficulties of numerical solution of the governing equations are resolved by reducing the problem to an equation for the electric field potential, F, as opposed to a more conventional approach focused on the vertical jump, y, of the magnetic field potential across a combined ocean/ marine-sediment-layer spherical shell. The present formulation permits using more realistic input data on ocean currents and ultimately yields much greater (by at least an order of magnitude) values of the magnetic field at sea surface than predicted in earlier studies. Such large values are comparable to, and in some cases exceed, magnetic field variations caused by lithospheric and ionospheric sources on monthly to interannual timescales. At the 400-km altitude (of CHAMP satellite), the field attains 6 nT. The model predictions show favorable comparisons with some in situ measurements as well as with Challenging Minisatellite Payload (CHAMP) satellite magnetometer data.Citation: Glazman, R. E., and Y. N. Golubev (2005), Variability of the ocean-induced magnetic field predicted at sea surface and at satellite altitudes,

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Electrical Properties of Sea Water: Theory and Applications

Pawlowicz

2019

Encyclopedia of Ocean Sciences

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The Relation of Seafloor Voltages to Ocean Transports in North Atlantic Circulation Models: Model Results and Practical Considerations for Transport Monitoring*

Cited by 16 publications

References 33 publications

Can undersea voltage measurements detect tsunamis?

Can undersea voltage measurements detect tsunamis?

Variability of the ocean‐induced magnetic field predicted at sea surface and at satellite altitudes

Electrical Properties of Sea Water: Theory and Applications

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