Mathematics – Logic
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsa11b..02m&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #SA11B-02
Mathematics
Logic
2431 Ionosphere/Magnetosphere Interactions (2736), 2471 Plasma Waves And Instabilities, 2716 Energetic Particles, Precipitating, 2778 Ring Current
Scientific paper
We report on wave and plasma disturbances observed by Combined Release and Radiation Effects (CRRES) and Defense Meteorological Satellite Program (DMSP) satellites during the magnetic storm of June 5, 1991 in the region of ring current/plasmasphere overlap and the conjugate topside ionosphere During three ring current nose encounters near L = 2.4, the plasmasphere was highly-structured. A rich variety of wave phenomena were observed simultaneous with enhanced fluxes of low-energy (< ˜ 1 keV) electrons and ions, indicating the wave heating/acceleration source. Earthward of the plasma sheet boundary, which was near L = 5.5, wave-like structures in the dawn-to-dusk electric field with spatial wave-lengths from about 300 to 1000 km and magnitudes of ~1-3 mV/m were apparent. Mapped to ionospheric altitudes, these fields should produce broad irregular SAPS with average sunward velocities ~ 1 km/s. At about the same time DMSP F8, F9, and F10 indeed observed highly-structured SAPS in the topside ionosphere coincident with precipitating ring current ions, enhanced fluxes of suprathermal electrons and ions, elevated electron temperatures, and deep highly-irregular density troughs. Overall, these events represent the so-called strong wave-SAPS phenomenon [Mishin et al., JGR (2003), 108, 1309, 10.1029/2002JA009793]. Their importance for Space Weather is indicated by strong GPS phase and amplitude scintillations observed over the continental US [Basu et al., JGR, 106, 30389, 2001; Ledvina et al., GRL, 29, 10.1029/2002GL014770] coincident with similar events.
Burke William J.
Mishin Evgeni V.
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