Generation of Field‐Aligned Currents in Response to Sudden Enhancement of Solar Wind Dynamic Pressure
Tian Zhang,
Yusuke Ebihara,
Takashi Tanaka
Abstract:We investigated the generation of field‐aligned currents (FACs) in response to the sudden enhancement of the solar wind dynamic pressure by tracing backward in time a packet of the Alfvén wave in the global magnetohydrodynamic (MHD) simulation. The generation region is identified from three perspectives, including the continuity of the current, the energy conservation and the time rate of change in the FACs. The generation mechanism is found to be related with the tailward motion of the compressional wave, whi… Show more
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