Density Structure in the Plasmaspheric Boundary Layer (PBL) As Seen By IMAGE (Invited)

Details Density Structure in the Plasmaspheric Boundary Layer (PBL) As Seen By IMAGE (Invited) Density Structure in the Plasmaspheric Boundary Layer (PBL) As Seen By IMAGE (Invited)

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsa34a..06g&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SA34A-06

Physics

[2712] Magnetospheric Physics / Electric Fields, [2730] Magnetospheric Physics / Magnetosphere: Inner, [2760] Magnetospheric Physics / Plasma Convection, [2768] Magnetospheric Physics / Plasmasphere

Scientific paper

We present statistical and case-study analysis of multiple years of plasmaspheric data from the Imager for Magnetopause-to-Aurora Global Exploration (IMAGE) mission. On a global level, this study confirms that the plasmaspheric density distribution evolves in phases (analogous to storm phases), in which the formation and subsequent development of plumes follow epochs divided by changes in the relative strength of convection. Plasmaspheric (plume) phases are an obvious and consistent feature in single-event case studies. Statistical analysis requires a superposed epoch analysis to reveal phases, but this approach requires the large amount of data from the IMAGE mission and from several other missions (Polar, CRRES, ISEE, and OGO-5) to provide anything but a very crude empirical characterization of global density structure versus epoch and geomagnetic activity. Quantitative analysis of sub-global density structure will also be presented, showing the evolution versus epoch of density structure at various sub-global spatial scales, and its empirical (epoch-based) characterization.

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