Paper#: 99
Poster #: 16
Session Name: Poster Session 2
Room: East Ballroom
Day: Thursday
Time: 10:10 a.m.-Noon
Abstract Title: The Evolution of Substorm Enhanced Whistler Mode Waves and Their Relation to Sces Seen on the Ground.
PresentSurname: Abel, G.A.
All Authors: G.A. Abel, A. J. Smith, N. P. Meredith, G.D. Reeves
Abstract : Substorm Chorus Events (SCEs) have proved to be a useful indicator of substorm onset. The events are regularly seen in the data from the VELOX (VLF/ELF Logger Experiment) instrument at Halley, Antarctica, which has provided a decade of near continuous observations. With the completion of the ongoing deployment of VELOXnet (a network of 5 VELOX instruments), the coverage will be extended to all local times. The frequency dispersed signatures of SCEs can be qualitatively understood in terms of substorm injected, energy dispersed, electrons, exciting whistler mode waves, which are then ducted to the ground. In this paper we present the results of a study into 22 case studies of CRRES observations of substorm enhanced whistler mode waves close to the geomagnetic equator and between 02:00 and 06:00 MLT. The resonant frequency of the whistler waves depends on both the energy of the injected electron population and magnetic field strength. Studying the evolution of the enhanced whistler mode waves on both inbound and outbound passes of CRRES allows the separation of these two effects. By relating the evolution of whistler mode waves following substorm onset to the signatures seen on the ground we hope to better understand the various observational characteristics of SCEs. From these observational characteristics we hope to gain further information regarding the timing, location and energy of injected electrons, making the 10-year SCE dataset a powerful statistical tool for substorm research.