PolarDARN/SuperDARN radar echo signatures of moving polar cap arcs

Details PolarDARN/SuperDARN radar echo signatures of moving polar cap arcs PolarDARN/SuperDARN radar echo signatures of moving polar cap arcs

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm13a1666k&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SM13A-1666

Physics

2475 Polar Cap Ionosphere, 2712 Electric Fields (2411), 2721 Field-Aligned Currents And Current Systems (2409), 2760 Plasma Convection (2463), 2776 Polar Cap Phenomena

Scientific paper

The OMTI all-sky camera at Resolute Bay, NWT (Canada) is located in the middle of the field of view of a newly installed SuperDARN radar pair, PolarDARN. The radars are located at Rankin Inlet and Inuvik and are capable of convection monitoring in significant portion of the northern polar cap. In this study we present several events with the polar cap arc-like forms crossing the Resolute Bay zenith. The forms show clear signatures in the HF echo parameters (both for the E and F region echoes) with the most dramatic effect in the Doppler velocity. The velocity changes polarity (plasma motion towards or away from the magnetic noon) right at the arc location. Local PolarDARN observations of plasma flows are compared with global-scale convection maps. Similarities/differences with published observations of theta-aurora are discussed.

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