First radar observations in the vicinity of the plasmapause of pulsed ionospheric flows generated by bursty bulk flows
Article first published online: 6 JAN 2011
Copyright 2011 by the American Geophysical Union.
Geophysical Research Letters
Volume 38, Issue 1, 16 January 2011
How to Cite
2011), First radar observations in the vicinity of the plasmapause of pulsed ionospheric flows generated by bursty bulk flows, Geophys. Res. Lett., 38, L01103, doi:10.1029/2010GL045857., , , , , , , , , and (
- Issue published online: 6 JAN 2011
- Article first published online: 6 JAN 2011
- Manuscript Accepted: 24 NOV 2010
- Manuscript Revised: 11 NOV 2010
- Manuscript Received: 15 OCT 2010
- bursty bulk flow (BBF);
- ultra low frequency (ULF) waves;
- Pi2 pulsation;
 Recent expansion of the SuperDARN network to mid-latitudes and the addition of a new high-time resolution mode provides new opportunities to observe mid-latitude ultra-low frequency waves and other ionospheric sub-auroral features at high temporal resolution. On 22 February 2008, the Blackstone SuperDARN radar and THEMIS ground magnetometers simultaneously observed substorm Pi2 pulsations. Similarities in measurements from the Blackstone radar and a magnetometer at Remus suggest a common generating mechanism. Cross-phase analysis of magnetometer data places these measurements at the ionospheric projection of the plasmapause, while fine spatial and temporal details of the radar data show evidence of field line compressions. About 1 min prior to ground Pi2 observation, 2 Earthward-moving Bursty Bulk Flows (BBFs) were observed by THEMIS probes D and E in the near-Earth plasma sheet. We conclude that the first 2 pulses of the Pi2s observed at Blackstone and Remus result from compressional energy generated by BBFs braking against the magnetospheric dipolar region.