Polar patches generated by solar wind alfven wave coupling to the dayside magnetosphere

Details Polar patches generated by solar wind alfven wave coupling to the dayside magnetosphere Polar patches generated by solar wind alfven wave coupling to the dayside magnetosphere

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999adspr..23.1777p&link_type=abstract

Advances in Space Research, Volume 23, Issue 10, p. 1777-1780.

Physics

Scientific paper

Ionospheric signatures of coupling between solar wind Alfvén waves and the dayside magnetosphere were observed near the cusp footprint. These included flow channel events and poleward progressing DPY currents. A long series of highly structured polar patches was observed by an ionosonde and an all-sky camera in the central polar cap. The patches were a by-product of the coupling process. It is suggested that density depletions and electron precipitation, associated with the Alfvén-wave-modulated field-aligned and ionospheric currents, structured the auroral and cusp ionosphere into patches which were subsequently convected into the polar cap.

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