Observational search for magnetosheath merging

Details Observational search for magnetosheath merging Observational search for magnetosheath merging

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsm21c..06m&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SM21C-06

Other

2724 Magnetopause, Cusp, And Boundary Layers, 2728 Magnetosheath, 2740 Magnetospheric Configuration And Dynamics, 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

Magnetosheath merging has been predicted using the Integrated Space Weather Model (ISM). Directional discontinuities are distorted as they are slowed inside the bow shock, but continue to propagate downstream in the unshocked solar wind. Merging is predicted to occur as the discontinuity is compressed and the current intensifies. Polar, with its apogee now near the equator, slowly traverses the magnetosheath in front of the nose. Several directional discontinuities have been observed outside of the magnetopause where accelerated particles and wave Poynting flux indicates the possibility of merging (on April 7, 2000, March 31, 2001, and March 12, 2001). For one case in particular where the IMF rotated from south to north and the observation was clearly away from the magnetopause, the ion acceleration and Poynting flux was particularly strong. We will test these observations for other commonly accepted signatures of merging.

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