Relationships between dayside field-aligned currents and particle precipitation

Details Relationships between dayside field-aligned currents and particle precipitation Relationships between dayside field-aligned currents and particle precipitation

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm32a..03w&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM32A-03

Physics

[2431] Ionosphere / Ionosphere/Magnetosphere Interactions, [2455] Ionosphere / Particle Precipitation, [2704] Magnetospheric Physics / Auroral Phenomena, [2721] Magnetospheric Physics / Field-Aligned Currents And Current Systems

Scientific paper

Both the field-aligned currents and particle precipitation play important roles in the magnetosphere-ionosphere coupling. The polarities and densities of large scale field-aligned currents from the DMSP magnetometer data 1983-2005 were determined using an automated algorithm. The particle precipitations often have characteristics that reflect their source regions in the magnetosphere, which led to the development of the automatic region identification schemes. The particle precipitation regions from the DMSP SSJ4 particle data were also determined from 1983-2005. The relationships between the field-aligned currents and the particle precipitation regions on the dayside were explored and identified. The ion westward and electron eastward drifts may contribute to the prenoon-postnoon asymmetry of the regions. The effects of IMF Bz and By on the juxtapositions of particle precipitations and field-aligned currents are investigated. The solar wind-magnetosphere coupling issues are investigated.

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