Midlatitude Ionospheric Oscillations in Response to Quasi-Periodic (~1 Hour) Variations of Solar Wind Pressure

Details Midlatitude Ionospheric Oscillations in Response to Quasi-Periodic (~1 Hour) Variations of Solar Wind Pressure Midlatitude Ionospheric Oscillations in Response to Quasi-Periodic (~1 Hour) Variations of Solar Wind Pressure

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sa51a05h&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SA51A-05

Physics

2431 Ionosphere/Magnetosphere Interactions (2736), 2435 Ionospheric Disturbances, 2443 Midlatitude Ionosphere, 2730 Magnetosphere--Inner, 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

On January 7, 1998, the Millstone Hill incoherent scatter radar observed quasi-periodic (~1 hour) oscillations of electron density, ion velocity, ion temperature, and electron temperature in the ionospheric F region. Prominent features of this event include vertical wavefronts of the perturbations in all parameters and large perturbation amplitude in plasma temperature. These features exclude the possibility that the ionospheric oscillations were induced by traveling atmospheric disturbances. We have compared the F region plasma observations with measurements of solar wind pressure, geomagnetic field at geostationary orbit, and ground magnetometers, and find that all data sets at different local time sectors and different latitudes show similar perturbations. Possible mechanisms of the observed phenomena include compressions and expansions of the magnetosphere by solar wind pressure variations, forced oscillations of the magnetosphere and ionosphere, and characteristic magnetospheric perturbations. We will discuss these mechanisms.

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