Coordinated observations of a nighttime medium-scale traveling ionospheric disturbance in 630-nm airglow and HF radar echoes

Details Coordinated observations of a nighttime medium-scale traveling ionospheric disturbance in 630-nm airglow and HF radar echoes Coordinated observations of a nighttime medium-scale traveling ionospheric disturbance in 630-nm airglow and HF radar echoes

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsa53b1585s&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SA53B-1585

Physics

Optics

0310 Airglow And Aurora, 2400 Ionosphere (6929), 2435 Ionospheric Disturbances, 2439 Ionospheric Irregularities, 2487 Wave Propagation (0689, 3285, 4275, 4455, 6934)

Scientific paper

A nighttime medium-scale traveling ionospheric disturbance (MSTID) is studied with the SuperDARN Hokkaido HF radar and the OI 630-nm airglow imager located within the radar field of view at Paratunka, Russia (53N, 158E). On 8 December 2007, the MSTID propagating southwestward with a period of ~1 hour was first identified in optics by considering airglow intensity deviations from 1-hour running averages. Over the optical event, the radar was detecting ionospheric F-region echoes with poleward and equatorward Doppler velocities correlating, both spatially and temporally, with the airglow depletions and enhancements, respectively. The occurrence and velocity polarity of the observed echoes are consistent with the onset of the E x B plasma drifts caused by the MSTID-related electric field. These facts indicate that the MSTIDs are accompanied by oscillating polarization electric field structure in the F-region ionosphere.

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