Solar wind control of storm and substorm correlations

Details Solar wind control of storm and substorm correlations Solar wind control of storm and substorm correlations

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsm52a0570l&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #SM52A-0570

Physics

2778 Ring Current, 2784 Solar Wind/Magnetosphere Interactions, 2788 Storms And Substorms

Scientific paper

The Sym-H index has been used as a higher time resolution measure of the storm intensity, which is associated with the magnetic disturbance caused by the ring current. The AU and AL indices express the strongest current intensity of the eastward and westward auroral electrojets respectively. In this study both the AU and AL indices are compared with the Sym-H index for storm-time events. The storm-time events are selected for minimal Dst less than - 50nT. It is found that the correlation between the auroral electrojets and ring current changes case by case. These events are then separated by high and low correlation coefficients. Upstream solar wind characteristics related to these events are investigated. Possible causes for changes of the correlation coefficients will be discussed as well.

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