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Magnetotail dipolarization and associated current systems observed by Cluster and Double Star

By M. Volwerk, A. T. Y. Lui, M. Lester, A. P. Walsh, I. V. Alexeev, X. Cao, M. W. Dunlop, A. N. Fazakerley, Adrian Grocott, L. M. Kistler, X. Lun, C. Mouikis, Z. Pu, C. Shen, J. K. Shi, M. G. G. T. Taylor, W. Baumjohann, R. Nakamura, A. Runov, Z. Vörös, T. L. Zhang, T. Takada, H. Rème, B. Klecker and C. M. Carr


A dipolarization and its associated current systems are studied using Cluster, Double Star TC1, and ground-based observations. The Cluster spacecraft are located approximately 16 R E downtail near 0030 LT. The Double Star TC1 spacecraft is located more earthward at approximately 7 R E just before local midnight. Auroral observations by the Wideband Imaging Camera on the Imager for Magnetopause-to-Aurora Global Exploration spacecraft are used to determine the onset times of substorms. It is shown that the magnetic phenomena at the earthward site of a magnetic reconfiguration region are governed by field-aligned currents, which in their turn generate auroral brightenings near the foot points of the spacecraft. It is also shown that the inward and outward motion of the dipolarization front near Cluster has a direct influence on the parallel plasma flow at TC1, indicating a piston mechanism. Just like a piston, the inward moving dipolarization at Cluster pushes in plasma along with the flux transport, which turns to parallel plasma flow at TC1. When the flow reverses at Cluster, i.e., outgoing flux transport, the plasma gets “sucked out” again, which is directly reflected in the plasma data from TC1

Publisher: American Geophysical Union (AGU)
Year: 2008
DOI identifier: 10.1029/2007JA012729
OAI identifier: oai:lra.le.ac.uk:2381/7819

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  5. (1988). Average ion moments in the plasma sheet boundary layer, doi
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  20. (1994). Growth-phase thinning of the near-Earth current sheet during CDAW 6 substorm, doi
  21. (1996). Modeling the global magnetic field of the large-scale Birkeland current systems, doi
  22. (1997). PEACE: A plasma electron and current experiment, doi
  23. (2001). Plasma sheet thickness and electric currents, doi
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  25. (1996). Solitary kinetic Alfve´n wave: A study of the Poynting flux, doi
  26. (2004). Spatial scale of high-speed flows in the plasma sheet observed by Cluster, doi
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  28. (1993). Studies of polar current systems using the IMS Scandinavian magnetometer array, doi
  29. (2004). Temporal evolution of two auroral arcs as measured by the cluster satellite and coordinated ground-based instruments, doi
  30. (1996). The alternative paradigm for magnetospheric physics, doi
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