Physics
Scientific paper
Jul 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976p%26ss...24..629c&link_type=abstract
Planetary and Space Science, vol. 24, July 1976, p. 629-641.
Physics
Conductive Heat Transfer, Gas Dissociation, Magnetic Storms, Oxygen Recombination, Oxygen Spectra, Red Arcs, Africa, Heat Flux, Ionosondes, Isophotes, Molecular Ions, Oxygen Ions
Scientific paper
SAR arcs were observed from Southern Africa on December 17-18, 1971, August 4-5, 1972, and April 1-2, 1973, with the equatorwards edge at L = 1.8. Simultaneous with the latter event the intertropical arc was observed at an equatorial station. There was no apparent relationship. Calculations show that while the entire observed inter-tropical emission results from dissociative recombination of O2(+) this process may, in some cases, account for only a fraction of a percent of the observed SAR arc emission. More than five years of geomagnetic storm data shows that Southern African SAR arcs are unlikely unless disturbances exceed 150 gamma. For very severe 300 gamma disturbances main phase SAR arcs may be observed. Estimates of the fraction of storm energy used in production of the present arcs indicate they are inefficient sinks for magnetic storms.
Carman E. H.
Heeran M. P.
Skinner Julie N.
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