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Discussion papers | Copyright
https://doi.org/10.5194/angeo-2018-72
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Regular paper 10 Jul 2018

Regular paper | 10 Jul 2018

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This discussion paper is a preprint. It is a manuscript under review for the journal Annales Geophysicae (ANGEO).

On the Approximation of Spatial Structures of Global Tidal Magnetic Field Models

Roger Telschow1, Christian Gerhards1, and Martin Rother2 Roger Telschow et al.
  • 1Computational Science Center, University of Vienna, 1090 Vienna, Austria
  • 2Helmholtz Centre Potsdam German Research Centre for Geosciences – GFZ, Section 2.3 Geomagnetism, 14467 Potsdam, Germany

Abstract. The extraction of the magnetic signal induced by the oceanic M2 tide is typically based solely on the temporal periodicity of the signal. Here, we propose a system of tailored trial functions that additionally takes the spatial constraint into account that the sources of the signal are localized within the oceans. This construction requires knowledge of the underlying conductivity model but not of the inducing tidal current velocity. Approximations of existing tidal magnetic field models with these trial functions and comparisons with approximations based on other localized and non-localized trial functions are illustrated.

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The extraction of the magnetic signal induced by the oceanic M2 tide is typically based solely on the temporal periodicity of the signal. Here, we propose a system of tailored trial functions that additionally takes the spatial constraint into account that the sources of the signal are localized within the oceans. This construction requires knowledge of the underlying conductivity model but not of the inducing tidal current velocity.
The extraction of the magnetic signal induced by the oceanic M2 tide is typically based solely...
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