A MU radar-based study of mid-latitude F region response to a geomagnetic disturbance

Details A MU radar-based study of mid-latitude F region response to a geomagnetic disturbance A MU radar-based study of mid-latitude F region response to a geomagnetic disturbance

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9521077r&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 95, Dec. 1, 1990, p. 21077-21094.

Computer Science

Sound

26

F Region, Incoherent Scatter Radar, Ionospheric Sounding, Magnetic Storms, Midlatitude Atmosphere, Auroral Zones, Electron Density Profiles, Geomagnetism, Ionospheric Electron Density, Night Sky

Scientific paper

Three well-defined disturbances in the nighttime F region over Shigaraki, Japan, as observed with the MU radar on January 20-21, 1989 are presented. During the very large first disturbance, which lasted approximately from 2300 to 0240 LT, the height of maximum electron density increased by 220 km in 2 hr to reach an altitude of 600 km. The other two smaller disturbances occurred during approximately 0300-0500 LT and 0530-0700 LT. The first two disturbances are interpreted as the result of large vertical drifts of F region ionization due to the substorm-generated east-west electric fields appearing at midlatitudes. The third disturbance is attributed to a neutral wind perturbation associated with a gravity wave traveling equatorward. The wave is most plausibly generated by Joule heating during the first major substorm. The east-west electric field values during the disturbances are quantified using theoretical calculations.

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