Cross-Scale Coupling in the Inner Magnetosphere

Details Cross-Scale Coupling in the Inner Magnetosphere Cross-Scale Coupling in the Inner Magnetosphere

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsm41c1191k&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SM41C-1191

Physics

2700 Magnetospheric Physics (6939), 2704 Auroral Phenomena (2407), 2723 Magnetic Reconnection (7526, 7835), 2736 Magnetosphere/Ionosphere Interactions (2431), 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

The pursuit of knowledge about the behavior of near Earth plasma continues to lead toward a growing appreciation for the interdependence of plasma populations. Ring current plasma, for example, is the source of free energy that heat lower energy populations, generate waves, and change meso-scale electric fields. Radiation belt electrons also influence meso-scale electric fields, while strongly interacting with plasma waves. Thermal plasma in the plasmasphere directly influences the threshold for wave instabilities, while strongly responding to heating and electric fields. To understand one population requires an understanding of all populations or so it seems. The clues are there, but our theoretical understanding falls short. A myriad of densities structures are now routinely observed by the extreme ultraviolet imager on the IMAGE Mission, however only a few of which appear to be understood. Whistler- and EMIC- modes wave scattering are a viable mechanism for radiation belt loss, but to what extent as a function of location and magnetospheric conditions? Precipitating energetic plasma locally changes ionospheric conductivity, thereby directly changing local electric fields, but to what extent? Heavy ions in the plasmasphere dramatically alter available ion wave modes that may provide an important paths for particle-wave-particle processes, but is this only a storm-time effect? The intervening coupling processes are numerous and complex. The advent of high resolution measurements in space from satellites, such as FAST, POLAR, and Cluster, has revealed further complexities involving plasma microphysics demonstrating that the coupling between the auroral meso- and micro-scale processes are intrinsic in nature. The relevance of cross-scale coupling in the inner magnetosphere, and the roles of thermal to energetic plasmas will be discussed in this presentation.

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