Using Particle Observations from Geosynchronous Orbit as a Proxy for Whistler and EMIC Mode Wave Growth During High Speed Stream Driven Storms

Details Using Particle Observations from Geosynchronous Orbit as a Proxy for Whistler and EMIC Mode Wave Growth During High Speed Stream Driven Storms Using Particle Observations from Geosynchronous Orbit as a Proxy for Whistler and EMIC Mode Wave Growth During High Speed Stream Driven Storms

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm43b..03m&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SM43B-03

Physics

2764 Plasma Sheet, 2772 Plasma Waves And Instabilities (2471), 2774 Radiation Belts, 2778 Ring Current, 2788 Magnetic Storms And Substorms (7954)

Scientific paper

Multipoint LANL plasma data from geosynchronous orbit can be used to infer characteristics of whistler mode and electromagnetic ion cyclotron mode (EMIC) wave growth using linear theory. Recent work has shown that these inferences demonstrate significant differences in the statistical distributions of these waves during geomagnetic storms. Specifically, storms with higher post-storm relativistic electron fluxes exhibit above- average whistler wave activity and below-average EMIC wave activity in the recovery phase. This is consistent with whistler mode waves primarily being a growth mechanism for relativistic electrons and EMIC waves causing losses. The controlling factors for the net flux levels of relativistic electrons are still not clear. This study will examine plasma characteristics and wave properties specifically for high speed stream driven storms to discern how effective these processes are as compared to more typical storms. Though weak in traditional ring current signatures, high speed stream driven storms are particularly effective for the enhancement of relativistic electrons in the outer magnetosphere. By shedding light on this question, it may be possible to isolate particular controlling characteristic factors for radiation belt growth.

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