Return Current Region Aurora: Dayside Parameterization of Ion Conics and BBELF Activity at FAST Altitudes

Details Return Current Region Aurora: Dayside Parameterization of Ion Conics and BBELF Activity at FAST Altitudes Return Current Region Aurora: Dayside Parameterization of Ion Conics and BBELF Activity at FAST Altitudes

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsm12a1211l&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #SM12A-1211

Statistics

2407 Auroral Ionosphere (2704), 2483 Wave/Particle Interactions, 7867 Wave/Particle Interactions

Scientific paper

We consider auroral ion heating associated with broadband ELF (BBELF) wave activity in downward current, downward electric field regions on the pre-noon dayside at altitudes of 2000-4000~km, using data gathered from the FAST spacecraft. Statistics from 11 dayside passes are collected, and parameters including ion and electron distribution function moments, BBELF wave activity indices, and field aligned current density are indexed. Relationships between these parameters are quantified and compared to a larger similar study on the nightside (Lynch et al., 2002). We wish to determine whether the observed qualitative similarity between return current regions on the dayside and the nightside is backed up by a quantifiable parameter relationship. On the nightside it is found that the BBELF wave activity in these regions is highly correlated with a specific combination of parameters from the ion and field aligned current density data. This empirical relationship has guided theoretical developments in modelling of the return current region (see the related talk by Jasperse et al.)

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