Conjugacy between the two hemispheres at high latitudes in the null-separator model of the magnetosphere

Details Conjugacy between the two hemispheres at high latitudes in the null-separator model of the magnetosphere Conjugacy between the two hemispheres at high latitudes in the null-separator model of the magnetosphere

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm11a1698k&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SM11A-1698

Physics

[2706] Magnetospheric Physics / Cusp, [2724] Magnetospheric Physics / Magnetopause And Boundary Layers, [2740] Magnetospheric Physics / Magnetospheric Configuration And Dynamics

Scientific paper

Ionospheric manifestations of many magnetospheric phenomena are conjugate between the two hemispheres, meaning that they appear similarly and nearly simultaneously in the northern and southern hemispheres at approximately the same magnetic latitudes and longitudes. At high latitudes and especially in the cusp area this symmetry is, however, often broken implying complicated topology of the magnetic field lines in this region. Such magnetic field topology, in which the ionospheric footprints of a field line have substantially different magnetic longitudes naturally appear in the analytical null-separator model. Magnetic field topology consistent with the null-separator model has been recently identified in global circulation studies of the terrestrial magnetosphere and was found to be consistent with SuperDARN and DMSP observations. In this presentation we will focus on implications of this model for conjugacy between the two hemispheres at high latitudes, in particular in the cusp region.

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