Physics
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm31c..01d&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #SM31C-01
Physics
2740 Magnetospheric Configuration And Dynamics, 2760 Plasma Convection (2463), 2784 Solar Wind/Magnetosphere Interactions, 2788 Magnetic Storms And Substorms (7954), 2790 Substorms
Scientific paper
We report the results of a statistical investigation that relates various solar wind and IMF drivers to different modes of magnetospheric convection, including isolated substorms, periods of balanced magnetospheric convection (BRI) - more commonly termed steady magnetospheric convection (SMC), and individual sawtooth injections. We investigate the driver values as well as the 'steadiness' of the driver in order to determine the importance of magnitude, sign and stability of the drivers for the different modes of energy transport. It appears that the magnitude and direction of Bz is sufficient to describe the conditions for substorm occurrence , while BRIs and sawteeth require both magnitude and steadiness of certain drivers to specify the occurrence conditions. We find that BRI and sawteeth intervals show similar 'steadiness' values in the driving conditions, but greater magnitude of the drivers is found during sawteeth oscillations. We also find evidence that the magnitude of solar wind velocity may play a role in whether the magnetosphere enters a sawtooth mode or a BRI mode.
Cai Xu
Clauer C.
DeJong Anna D.
Ridley Aaron J.
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