Tangential electric fields in a drifting auroral arc

Details Tangential electric fields in a drifting auroral arc Tangential electric fields in a drifting auroral arc

Apr 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981georl...8..373y&link_type=abstract

Geophysical Research Letters, vol. 8, Apr. 1981, p. 373-376.

Computer Science

Sound

6

Atmospheric Electricity, Auroral Arcs, Ion Motion, Ionospheric Sounding, Convective Flow, F Region, Ionospheric Electron Density, Propagation Velocity, Rocket Sounding

Scientific paper

Rocket-borne ion convection velocity and ground-based optical measurements in an early evening, equatorward drifting, NW-SE oriented auroral arc are reported. Measurements indicate a detailed correspondence between the normal component of the ion convection velocity (the component normal to the auroral arc) and the drift motion of the auroral arc. The two velocities were identical on a time scale of minutes, and correlated strongly with each other in smaller-scale temporal variations. The correspondence implies a near-zero tangential electric field in an auroral arc, in the frame of reference of the arc. The observations have serious consequences for several auroral theories.

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