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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 24, issue 10 | Copyright
Ann. Geophys., 24, 2573-2582, 2006
https://doi.org/10.5194/angeo-24-2573-2006
© Author(s) 2006. This work is distributed under
the Creative Commons Attribution 3.0 License.

  20 Oct 2006

20 Oct 2006

New method for solving inductive electric fields in the non-uniformly conducting ionosphere

H. Vanhamäki, O. Amm, and A. Viljanen H. Vanhamäki et al.
  • Finnish Meteorological Institute, Space Research Unit, P.O. Box 503, 00101 Helsinki, Finland

Abstract. We present a new calculation method for solving inductive electric fields in the ionosphere. The time series of the potential part of the ionospheric electric field, together with the Hall and Pedersen conductances serves as the input to this method. The output is the time series of the induced rotational part of the ionospheric electric field. The calculation method works in the time-domain and can be used with non-uniform, time-dependent conductances. In addition, no particular symmetry requirements are imposed on the input potential electric field. The presented method makes use of special non-local vector basis functions called the Cartesian Elementary Current Systems (CECS). This vector basis offers a convenient way of representing curl-free and divergence-free parts of 2-dimensional vector fields and makes it possible to solve the induction problem using simple linear algebra. The new calculation method is validated by comparing it with previously published results for Alfvén wave reflection from a uniformly conducting ionosphere.

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