By dominated magnetopause reconnection and its role in the formation of LLBL

Details By dominated magnetopause reconnection and its role in the formation of LLBL By dominated magnetopause reconnection and its role in the formation of LLBL

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agusmsm41d..02p&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SM41D-02

Physics

2723 Magnetic Reconnection (7526, 7835), 2724 Magnetopause And Boundary Layers

Scientific paper

Previous Cluster observations provided evidence that when the dominated component of the IMF appears in the Y-direction; magnetopause reconnection occurs in the cusp or at high-latitudes, playing a significant role in dynamic processes in the cusp region. Coordinated measurements of Cluster and Double Star give the opportunity to investigate the global configuration and consequence of the By-dominated magnetopause reconnection. From Cluster and Double Star measurements made in the dayside during 2004 and 2005, we have found a few typical events in which By-dominated reconnection operates both in the cusp and dayside low-latitude magnetopause. In the cusp high-speed Vy-jet opposite to the background flow is seen which is closely related with relevant variation of By (and Bz). In the low-latitudes, FTEs are observed with which a high- speed flow mainly in the Y-direction is detected in the LLBL. The magnetosheath plasma is found to be mixed with magnetospheric one inside the LLBL. More over, reconnection in the cusp manifests the anti-parallel type, while that in the low latitudes is shown to be the sort of component reconnection. Possible connection between cusp reconnection and low latitude reconnection is discussed. Plausible role that the By-dominated connection plays in leading to plasma entry into the magnetosphere is also studied.

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