Cusp region and auroral zone field aligned currents

Details Cusp region and auroral zone field aligned currents Cusp region and auroral zone field aligned currents

Dec 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ang....37..529p&link_type=abstract

Annales de Geophysique, vol. 37, Oct.-Dec. 1981, p. 529-538. Danish Space Board

Astronomy and Astrophysics

Astronomy

Auroral Zones, Field Aligned Currents, Interplanetary Magnetic Fields, Ionospheric Currents, Magnetopause, Plasma Interactions, Solar Wind, Astronomical Models, Current Sheets, Polar Caps

Scientific paper

Viewing the cusp field-aligned currents as extensions of the magnetopause current component which shields out the IMF B(y)-component from the magnetosphere, and considering the anticorrelation between IMF B(x) and B(y), the similar extension of the IMF B(x)-related magnetopause current to the auroral oval may explain an observed IMF B(y)-dependence of the evening auroral arc occurrence. It is suggested that the IMF B(z)-related general magnetospheric convection in the outer equatorial dawn and dusk regions may drive a plasma-braking generator on auroral field lines. The observed plasma velocities are sufficient to drive both the auroral line region 2 and the balanced portion of the region 1 currents. In addition, the dependence of the auroral morphology on B(z) for both sunward and reversed convection is explained.

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