Magnetosphere-ionosphere coupling initiated at the duskside boundary layer during impulsive IMF rotations

Details Magnetosphere-ionosphere coupling initiated at the duskside boundary layer during impulsive IMF rotations Magnetosphere-ionosphere coupling initiated at the duskside boundary layer during impulsive IMF rotations

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsm23b..04f&link_type=abstract

American Geophysical Union, Spring Meeting 2005, abstract #SM23B-04

Other

2736 Magnetosphere/Ionosphere Interactions, 2753 Numerical Modeling, 2760 Plasma Convection, 2772 Plasma Waves And Instabilities

Scientific paper

Observations from ACE, Wind, Cluster, FAST and ground magnetometers and radars, complemented by theory, are presented to illustrate various aspects of Magnetosphere-Ionosphere (M-I) coupling during an event characterized by a sequence of interplanetary directional discontinuities (DDs) impinging on the magnetopshere. The slow (several hours) northward rotation of the IMF is punctuated by these DDs, which include abrupt and simultaneous east-west rotations of the field and flow. Cluster was traversing the duskside magnetopause boundary layer at geomagnetic latitudes of ~30°. Calculations confirm the presence of magnetopause surface waves of Kelvin-Helmholtz origin, in addition to other undulatory motions of large amplitude. The continuous ground coverage from magnetometer arrays and radars allow us to document the ionospheric imprint of this activity. Finally, the M-I coupling during this event is compared to that in a previous Cluster-FAST-Sondrestrom conjunction when Cluster was in the duskside high-latitude boundary layer. This work is supported partially by NASA Grant NAG5-13116

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