Many numerical models of magnetospheric dynamics treat the ionosphere as an inner boundary condition. These models have traditionally used the current continuity condition, treating the ionosphere as a sheet current in which the electric field is electrostatic. A more general boundary condition is suggested that not only is more complete, but also straightforward to implement. Results from a model using this boundary condition applied to the excitation of field line resonances in the magnetosphere are presented.
Bibliographical noteFunding Information:
We thank Colin Waters, Murray Sciffer, and Pasha Ponomarenko for useful discussions and suggestions on this model. This work was supported by NASA Grant NAG5-13072 and NSF Grant ATM-0201703. Computing services were provided by the Minnesota Supercomputer Institute. R.L.L. would like to acknowledge the hospitality and support of the University of Newcastle, NSW, Australia, where part of this work was carried out.
- Alfvén waves
- Magnetosphere-ionosphere coupling
- Numerical modeling