Physics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsm11d..01h&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #SM11D-01
Physics
2407 Auroral Ionosphere (2704), 2431 Ionosphere/Magnetosphere Interactions (2736), 2736 Magnetosphere/Ionosphere Interactions (2431), 7867 Wave/Particle Interactions (2483, 6984)
Scientific paper
There is great interest in the magnetospheric community in obtaining compact representations of the ionospheric outflow fluxes and their relationships to putative drivers. Recently, analyses of measurements by FAST [Strangeway et al., 2005] and POLAR [Zheng et al., 2005] has led to best fit formulas for the measurement-based relationships of the outflows levels to parameterizations for electron precipitation and Poynting fluxes, which are expected to be among the principal drivers, or closely related to them, for the ionospheric outflows. In this presentation, we shall use the results of an extensive set of systematic simulation runs with our Dynamic Fluid Kinetic (DyFK) simulation code for ionospheric plasma field-aligned transport to obtain O+ outflow flux levels versus precipitation electron energy flux levels and the peak spectral wave densities for BBELF waves which transversely heat ionospheric ions. We shall present spectrograms of the relationship of the ion outflow values to these electron energy flux and BBELF wave levels. A preliminary approximate formulaic representation at this time is: FluxO+ = 5*(3.0x10^9 + 0.02x1013 f_e^{1.4})(tanh(8Dwave)+0.2Dwave^{0.6}) where FluxO+ is the O+ number flux in m-2s-1 at 3R_E mapped to 1000 km altitude, f_e is the electron precipitation energy flux in ergs cm-2 s-1, and Dwave is the wave spectrum density at 6.5 Hz in (mV)2 m-2 Hz-1. Strangeway, R. J., R. E. Ergun, Y.-J. Su, C. W. Carlson, and R. C. Elphic, Factors controlling ionospheric outflows as observed at intermediate altitudes, J. Geophys. Res., 110, A03221, doi:10.1029/2004JA010829, 2005. Zheng, Y., T. E. Moore, F. S. Mozer, C. T. Russell, and R. J. Strangeway, Polar study of ionospheric ion outflow versus energy input, J. Geophys. Res., 110, A07210, doi:10.1029/2004JA010995, 2005.
Horwitz James L.
Zeng Weifei
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