Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm13a1784b&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SM13A-1784
Physics
[2730] Magnetospheric Physics / Magnetosphere: Inner, [2778] Magnetospheric Physics / Ring Current
Scientific paper
We compare the distribution of the storm-time plasma pressure and its associated 3D ring current system during high-speed streams (HSS) with that occuring during Coronal Mass Ejections (CME). Energetic Neutral Atom (ENA) images from TWINS, the High Energy Neutral Atom (HENA) camera on board the IMAGE mission and from in-situ measurements by THEMIS and Cluster are used to characterize the ring current proton and O+ pressure evolution and morphology. The associated 3D current system is derived from the retrieved global pressures, as well as from the equatorial current system obtained by the TS07d field model (http://geomag_field.jhuapl.edu/model/). The differences in the current distributions between the two classes of storms are analyzed. We conclude by discussing the present and future capabilities required to resolve the global spatiotemporal evolution of plasma pressure and its 3D current system that are the critical drivers of space weather in the inner magnetosphere.
C:son Brandt Pontus
Dandouras Iannis S.
Hsieh S. W.
Keika Kunihiro
Sitnov Mikhail I.
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