Physics
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsm44a..01j&link_type=abstract
American Geophysical Union, Spring Meeting 2005, abstract #SM44A-01
Physics
2720 Energetic Particles, Trapped, 2730 Magnetosphere: Inner, 2753 Numerical Modeling, 2778 Ring Current, 2788 Storms And Substorms
Scientific paper
The ring current represents the essential element of all geomagnetic storms; however, what mechanisms are important for the acceleration and loss of energetic particles during stormtime and how they relate to the solar wind drivers are not well understood. We use our global physics-based model to simulate ring current evolution during several large multi-dip storms that occurred during solar minimum, the rising phase of the solar cycle, and solar maximum conditions: the October 18, 1995 magnetic cloud, and the complex ejecta in early May 1998 and in October 21-25, 2001. We compare these storms in terms of ring current injection, morphology, role of dense plasma sheet, ion composition, and relative importance of particle loss mechanisms. We investigate the effect of varying solar activity, as reflected in near-Earth interplanetary conditions, on ring current evolution and how large geomagnetic storms form.
Farrugia Charles J.
Jordanova Vania K.
Thomsen Michelle F.
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