Physics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm14a..06b&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #SM14A-06
Physics
[2730] Magnetospheric Physics / Magnetosphere: Inner, [2760] Magnetospheric Physics / Plasma Convection, [2778] Magnetospheric Physics / Ring Current, [2788] Magnetospheric Physics / Magnetic Storms And Substorms
Scientific paper
The ring current (RC) exhibits different behavior during magnetospheric storms depending on storm strength and the storm driver. Using energetic neutral atom (ENA) data and model results, we perform a comparative study of RC behavior during weak and strong storms and try to find out what is the main factor that controls a storm size. To study weak storms, we use ENA data from Two Wide-angle Imaging Neutral-atom Spectrometers (TWINS) during solar minimum in 2008. The strong storm RC is studied with IMAGE/HENA data near solar cycle maximum in 2000. To model RC and ENA emissions we use the Comprehensive Ring Current Model (CRCM). Based on our data-model comparative study, we examine the role of electric field shielding in RC asymmetry, the relation between ENA emissions from RC injections and low-altitude ENA emissions, and the location of total pressure peak during main phase and recovery phase for different types of storms.
Buzulukova N.
C:son Brandt Pontus
Fok M. H.
Goldstein Jeffrey Jay
McComas David John
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