On the ion precipitation due to EMIC waves and field line curvature (FLC) scattering and their subsequent impact on the ionosphere
Abstract
We investigate the ion precipitation caused by EMIC waves and field line curvature (FLC) scattering and its impact on the upper atmosphere with a self-consistently coupling between a ring current model (RAM-SCB) and an ionospheric particle transport model (GLOW). The FLC scattering produces precipitation of ions above tens of keV mainly in the nightside sector where the magnetic field lines are highly stretched, while the EMIC waves mostly interact with ring current ions in the dusk-to-midnight sector. These precipitating energetic ions further impacts on the ionosphere-thermosphere and cause ionization in low altitudes. In this study, we examine the low-altitude responses associated with the above two loss processes, and further compare with that resulting from electron precipitation to understand the relative contribution of ion precipitation to the ionospheric electrodynamics.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFMSM51F3246T
- Keywords:
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- 2736 Magnetosphere/ionosphere interactions;
- MAGNETOSPHERIC PHYSICS;
- 2772 Plasma waves and instabilities;
- MAGNETOSPHERIC PHYSICS;
- 7867 Wave/particle interactions;
- SPACE PLASMA PHYSICS;
- 7984 Space radiation environment;
- SPACE WEATHER