Analysis of Ring Current Asymmetry in Main Phase and Recovery

Details Analysis of Ring Current Asymmetry in Main Phase and Recovery Analysis of Ring Current Asymmetry in Main Phase and Recovery

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsm52a..04t&link_type=abstract

American Geophysical Union, Spring Meeting 2002, abstract #SM52A-04

Physics

2778 Ring Current, 2788 Storms And Substorms

Scientific paper

Recent work has shown that the asymmetric portion of the stormtime ring current is a dominant contributor to the Dst index, and therefore to the overall energy of the ring current. We examine the ring current azimuthal asymmetry, making use of POLAR CAMMICE ring current passes as well as ground magnetometer data. We analyze several cases during magnetic storms, where we follow the progression of the ring current from its peak of asymmetry through to the recovery phase where it eventually becomes a symmetric ring. We find that the data sometimes show a very asymmetric ring current well into the recovery phase, and we discuss the implications of these findings in interpreting globally-averaged indices such as Dst.

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