Quantifying the Accuracy of Inner Magnetospheric Electric Field Descriptions With Data- Model Comparisons for All Intense Storms of Solar Cycle 23

Details Quantifying the Accuracy of Inner Magnetospheric Electric Field Descriptions With Data- Model Comparisons for All Intense Storms of Solar Cycle 23 Quantifying the Accuracy of Inner Magnetospheric Electric Field Descriptions With Data- Model Comparisons for All Intense Storms of Solar Cycle 23

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm11a1591l&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SM11A-1591

Other

2712 Electric Fields (2411), 2768 Plasmasphere, 2778 Ring Current, 2788 Magnetic Storms And Substorms (7954)

Scientific paper

All of the intense magnetic storms (minimum Dst value of < -100 nT) from solar cycle 23 (1996 - 2005) were simulated using the hot electron and ion drift integrator (HEIDI) model. The simulations were run using two electric field descriptions: a Kp-driven shielded Volland-Stern electric field and a self-consistent electric field calculated from the HEIDI-generated field-aligned currents. Of the 90 events, 69 had acceptable boundary condition inputs (nightside plasma data from LANL and upstream solar wind data during the main phase), and are included in the analysis. Storms were classified according to their solar wind driver and means and correlations were examined. Data-model comparisons are made against Dst* time series and dayside LANL plasma data (plasmaspheric plume, hot ion moments and fluxes). It is found, for example, with Dst* comparisons, that the self-consistent electric field simulations are, on average, more accurate than the Volland-Stern-driven simulations. This is especially true for magnetic cloud-driven storm events. For other storm driver categories, the self-consistent results are, on average, more precise than the Volland-Stern results, with less variability in the data-model comparisons from one storm to the next. Other aspects of the data-model comparisons are presented and discussed.

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