Physics
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsm51c..05o&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #SM51C-05
Physics
2760 Plasma Convection, 2778 Ring Current, 2788 Storms And Substorms
Scientific paper
The time evolution of H+ flux equatorial 90° pitch angle distributions, as observed during a geomagnetic storm occurred on June 4 - 7 1991, is discussed. Proton spectra hourly data from CRRES MICS experiment, obtained along the spacecraft orbit in the midnight-dusk quadrant between L ~ 4 and ~ 7, are analyzed. The potentiality of a ring current empirical model [Milillo et al., JGR, in press, 2001] is tested by attempting to reconstruct the trend of the ion distributions on a global scale during the whole storm development. The global storm major effects, like L-shell compression, partial ring current generation, and cross-tail potential drop increase are reconstructed by modifying some of the model parameters in order to best-fit the experimental data at each space and time location. During the recovery phase, when the cross-tail potential decreases, the energetic proton fast decay by diffusion across the dayside magnetopause is discussed with respect to charge exchange decay.
Daglis Ioannis A.
Korth Alex
Milillo Anna
Mura Antonio
Orsini Stefano
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