The interplanetary magnetic field By effects on large-scale field-aligned currents near local noon - Contributions from cusp part and noncusp part

Details The interplanetary magnetic field By effects on large-scale field-aligned currents near local noon - Contributions from cusp part and noncusp part The interplanetary magnetic field By effects on large-scale field-aligned currents near local noon - Contributions from cusp part and noncusp part

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....98.5761y&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. A4, p. 5761-5767.

Other

27

Field Aligned Currents, Interplanetary Magnetic Fields, Polar Cusps, Polar Caps, Polar Orbits, Solar Wind, Viking Orbiter Spacecraft

Scientific paper

The influence of the IMF By component on the distribution of dayside large-scale field-aligned currents (FACs) is simulated. These FACs are divided into a 'cusp part' and a 'noncusp part' according to the coexisting plasma. It is suggested that the location of the cusp-part FACs shifts in a longitudinal direction whereas the location of the noncusp-part FACs shifts in both longitudinal and latitudinal directions in response to the IMF By. If combined, the noncusp-part region 1 FAC can be found poleward of the cusp-part FAC systems when the IMF By is strong. Since these two FACs (the cusp-region FAC and the poleward-leaped region 1 FAC) flow in the same direction poleward of the cusp, they reinforce each other in building a strong FAC, called DPY-FAC. The polewardmost part of the DPY-FAC flows on closed field lines even though it is located where the polar cap conventionally exists.

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