Investigation of cusp dynamics with IMAGE-FUV

Details Investigation of cusp dynamics with IMAGE-FUV Investigation of cusp dynamics with IMAGE-FUV

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsm51a..05f&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #SM51A-05

Physics

2704 Auroral Phenomena (2407), 2716 Energetic Particles, Precipitating, 2724 Magnetopause, Cusp, And Boundary Layers, 7835 Magnetic Reconnection

Scientific paper

The Earth's cusps constitute the regions of critical coupling and most direct access of solar wind plasma into the terrestrial magnetosphere/ionosphere. Ionospheric observations at the cusp footprint can thus be used to investigate the coupling process and its dynamics. Ground-based and in-situ measurements of cusp signatures are limited in time and spatial coverage. Recently, observations of proton aurora signatures by the IMAGE-FUV instrument demonstrated the long-duration coverage of precipitation signatures into the cusp. Global observations do not just provide the context information but allow for long-term observation of the cusp dynamics during varying solar wind conditions. We will summarize the results of such investigations demonstrating the different morphology of cusp precipitation during northward and southward IMF, the dynamic responses to changes in the IMF east-west component, the connection between cusp precipitation and reconnection at the high- and low-latitude magnetopause, and the overall importance of proton and electron precipitation into the ionosphere at the cusp footprint.

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