Physics
Scientific paper
Sep 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93.9937h&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 93, Sept. 1, 1988, p. 9937-9944.
Physics
18
Ion Temperature, Ionospheric Disturbances, Magnetic Disturbances, Magnetic Storms, Thermosphere, Neutral Gases, Radar Scattering
Scientific paper
The effects of geomagnetic activity on the middle-latitude ionosphere and thermosphere were investigated by comparing observations carried out by the Millstone Hill incoherent scatter radar during a series of large magnetic substorms during February 7-10, 1986, with similar measurements from the geomagnetically undisturbed January 1986 period described by Hagan and Salah (1988). It was found that exospheric temperature was enhanced by 200-500 K during the entire storm period, with larger enhancements during intense substorms, and ion-temperature enhancements as high as 900-1000 K occurred between 30 and 50 deg N during the most intense substorms. Thermospheric meridional winds surged southward during the geomagnetic disturbances; intensifications (400 to 600 m/s) of the magnetically undisturbed southward flow were observed near 2400 UT on both February 7 and 8.
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