Physics
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsm53a..04w&link_type=abstract
American Geophysical Union, Spring Meeting 2008, abstract #SM53A-04
Physics
2736 Magnetosphere/Ionosphere Interactions (2431), 2744 Magnetotail, 2748 Magnetotail Boundary Layers, 2764 Plasma Sheet, 2784 Solar Wind/Magnetosphere Interactions
Scientific paper
The solar wind enters the plasma sheet during northward and southward IMF. The connection between solar wind ions and plasma sheet cold-component ions has been demonstrated with in situ Geotail and inferred DMSP observations. The cold dense ions that originate from the solar wind are expected to decrease the entropies in the plasma sheet. Order of magnitude calculations of plasma sheet filling rate from reconnection and diffusion (either by K-H instabilities or kinetic Alfven waves) suggest that both entry mechanisms could result in roughly comparable filling rates, which are found consistent with DMSP observations. Previous studies have shown the presence of the dawn-dusk asymmetries in the plasma sheet temperatures and densities, which may be key in distinguishing various proposed entry mechanisms. This is investigated further with the entropy profiles and their dawn-dusk asymmetries during northward and southward IMF.
Johnson Jay Robert
Wing Simon
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