Physics
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsm23b0433e&link_type=abstract
American Geophysical Union, Fall Meeting 2005, abstract #SM23B-0433
Physics
2740 Magnetospheric Configuration And Dynamics, 2753 Numerical Modeling, 2764 Plasma Sheet
Scientific paper
Spacecraft observations have indicated that the magnetotail current sheet has significant meso-scale structure. Cluster observations have confirmed the existence and revealed further details of these structures. These structures include bifurcated current sheets as well as wave like structures along and across the magnetotail. Global magnetohydrodynamic (MHD) simulations provide a reasonable description of the large-scale structure of the Earth's magnetosphere as it responds to changes to solar wind and interplanetary magnetic field (IMF) direction. At least some of the observed structure begins to appear in high-resolution simulations, but it is not clear if all the observations can be reproduced this way. These simulations were driven by observed solar wind conditions from the ACE spacecraft, for intervals selected from the Cluster satellite data. We will compare the large scale variations of the current sheet as observed by Cluster to those seen in the global MHD simulations, and then focus on understanding the remaining meso-scale variations. The combination of Cluster observations and a global MHD approach will allow us to determine the physical causes of meso-scale structure and the solar wind and IMF conditions that lead to their formation.
Ashour-Abdalla Maha
El-Alaoui Mostafa
Richard Robert L.
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