A Comparison of the Composition of the Ring Current from IMAGE/HENA with that of Upflowing Ionospheric Ions from IMAGE/LENA during Magnetic Storms

Details A Comparison of the Composition of the Ring Current from IMAGE/HENA with that of Upflowing Ionospheric Ions from IMAGE/LENA during Magnetic Storms A Comparison of the Composition of the Ring Current from IMAGE/HENA with that of Upflowing Ionospheric Ions from IMAGE/LENA during Magnetic Storms

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sm31b05h&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SM31B-05

Physics

2778 Ring Current

Scientific paper

The tendency for the oxygen component of the ring current to increase relative to hydrogen in larger geomagnetic storms has been documented. This trend presumably results from enhanced oxygen-rich ionospheric outflow during the more active periods associated with large storms with the ionospheric plasma feeding the ring current, possibly by way of the plasma sheet. With the launch of IMAGE we can now make simultaneous observations of the ring current and the upflowing ions during individual magnetic storms and examine the proposed connection in detail. In this talk we will present results from four magnetic storms ranging from small to large that occurred during the summer of 2000. We use high energy neutral atom data from the HENA instrument on IMAGE as an indicator of the ring current composition and low energy neutral atom data from LENA as an indicator of upflowing ion composition. The storm to storm variations will be discussed.

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