Simulations of magnetic fields generated by the Antarctic Circumpolar Current at satellite altitude: Can geomagnetic measurements be used to monitor the flow?

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dc.contributor.authorVivier, Frédéric
dc.contributor.authorMaier-Reimer, Ernst
dc.contributor.authorTyler, Robert H.
dc.date.accessioned2023-07-26T20:04:17Z
dc.date.available2023-07-26T20:04:17Z
dc.date.issued2004-05-27
dc.description.abstractWith a volume transport of ∼134 × 10⁶ m³/s at the Drake Passage, the Antarctic Circumpolar Current (ACC) is the strongest ocean current. In the interest of estimating the secondary magnetic fields generated by the magnetohydrodynamic interaction of this flow with Earth's main field, we compare numerical results for the magnetic fields obtained using flow from three different ocean general circulation models. These simulations all expect detectable ocean signals in the magnetic records at ground and satellite altitude (400 km). The variability of this contribution is highly correlated with the ACC transport, a very important variable for climate studies. Observed magnetic fields could then be used, in principle, to derive an index of variability of the ACC. However given its small amplitude compared with other magnetic contributions, extracting the ocean's signal from observations remains a challenge at this time.en_US
dc.description.sponsorshipRT gratefully acknowledges support for this study from the NASA and the ONR. FV thanks J. Sirven (LODYC) for his help in formulating the 2D iterative spherical harmonics model for ψₑ, G. Madec, A. Bozec and R. Hordoir for making OPA products available. We are grateful to the ECCO Consortium (http://www.ecco-group.org/), for making their products available. We sincerely thank R. Holme and G. Hulot, who reviewed this manuscript, for their valuable comments.en_US
dc.description.urihttps://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2004GL019804en_US
dc.format.extent5 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m2xhxm-kdye
dc.identifier.citationVivier, F., Maier-Reimer, E., and Tyler, R. H. (2004), Simulations of magnetic fields generated by the Antarctic Circumpolar Current at satellite altitude: Can geomagnetic measurements be used to monitor the flow? Geophys. Res. Lett., 31, L10306, doi:10.1029/2004GL019804.en_US
dc.identifier.urihttps://doi.org/10.1029/2004GL019804
dc.identifier.urihttp://hdl.handle.net/11603/28874
dc.language.isoen_USen_US
dc.publisherWileyen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Joint Center for Earth Systems Technology
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.en_US
dc.titleSimulations of magnetic fields generated by the Antarctic Circumpolar Current at satellite altitude: Can geomagnetic measurements be used to monitor the flow?en_US
dc.typeTexten_US

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