Physics
Scientific paper
Jan 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93..270t&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 93, Jan. 1, 1988, p. 270-276. CNPQ-supported research.
Physics
12
Atmospheric Heating, Equatorial Atmosphere, Magnetic Storms, Particle Precipitation, Thermosphere, Brazil, Neutral Atoms, Ohmic Dissipation, Ring Currents, Trapped Particles
Scientific paper
Optical observations of ring-current particle precipitation from a near-equatorial site in Brazil are compared with variations in the AE and Dst indices. Precipitation occurs during ring-current injection when AE is large, but for large AE without ring-current injection, little precipitation is seen. Comparisons are also made with 630-nm observations of thermospheric heating made simultaneously in Peru. The thermospheric temperatures have been corrected for instrumental drift, and temperature enhancements of several hundred K are present. It is not possible to associate clearly the heating with direct precipitation nor in the short term with transport of heat from higher latitudes. On a longer time scale it is likely that both midlatitude ring-current sources and high-latitude Joule heating sources are involved.
Biondi Manfred A.
Meriwether W. Jr. J.
Sahai Yogeshwar
Tinsley Brian A.
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