Physics – Plasma Physics
Scientific paper
Nov 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998jgr...10326487b&link_type=abstract
Journal of Geophysical Research, Volume 103, Issue A11, p. 26487-26494
Physics
Plasma Physics
5
Interplanetary Physics: Interplanetary Magnetic Fields, Magnetospheric Physics: Magnetopause, Cusp, And Boundary Layers, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Space Plasma Physics: Magnetic Reconnection
Scientific paper
The principal purpose of the present paper is to report about a new magnetospheric reconnection structure arising for the near-radial interplanetary magnetic field (IMF) orientations. This structure includes simultaneous existence of two modes of the solar wind-magnetosphere coupling (two- and three-dimensional reconnections). For the southward IMF two two-dimensional merging sites exist: one on the noon equatorial magnetopause and the other in the magnetotail. Reconnection takes place along merging line connecting them. As IMF rotates from southward toward a radial orientation, the merging site where lobe fields reconnect becomes three-dimensional and moves from the tail to the high-latitude dayside magnetosphere (northward for IMF Bx>0 and southward for IMF Bx<0), while the merging site where interplanetary and closed field lines reconnect remains two-dimensional and shifts along the magnetopause from subsolar point to the south for IMF Bx>0 and to the north for IMF Bx<0. In the vicinity of two-dimensional magnetic null on the magnetopause, reconnection occurs at merging line simultaneously with the three-dimensional reconnection at the second neutral point in the magnetosphere. For the strong northward IMF two three-dimensional merging sites exist in the cusp regions of the magnetosphere. Proposed construction is supported by calculations in the paraboloid magnetospheric model.
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