Effect of R2-FAC development on the ionospheric electric field pattern deduced by a global ionospheric potential solver

摘要: [1] Toward the understanding of effect magnetosphere originated disturbances on global ionospheric electric field and current system, we developed a two-dimensional potential solver based so-called “thin shell model.” The important extension from previous studies is that our model covers pole-to-pole ionosphere without placing any boundary at equator. By using this solver, investigate how changes undershielding condition to overshielding as aligned (FAC) distribution changes. Calculations are performed by changing IR2/IR1 (the ratio intensities region 2 (R2) 1 (R1) FACs) moving R2-FAC relative fixed R1-FAC. results summarized follows: (1) turning point, which turns IR2/IR1 = 0.7 ∼ 0.8. (2) With increasing local time deference between R1 peaks, efficiency shielding increases but associated skews nightside. (3) At same weakened around noon, where R1-potential intrudes low latitude instead, R2-potential remains dominant other times. result suggests or should be identified observations not only in limited sector also overall much possible. In order accurately describe condition, suggest new classification terms, “complete-overshielding” “incomplete-overshielding.”