A new research of the current sheet and Field aligned current system: IMF, Solar Wind influence? MLT dependence?

Abstract:

Field-aligned current systems (FACs) are the dominant process by which energy and momentum are transported between the magnetosphere and the ionosphere-thermosphere system. Both large- and small-scale FACs have been observed in the auroral zone and the current sheets have complicated spatial and temporal variations. However, It is argued that while the intensity of currents varies from event to event, the basic pattern will be maintained or not. We present a statistical study of the temporal and spatial characteristics of FACs using Swarm satellite, and show the IMF, Solar Wind influence and the MLT dependence of the FACs.