Thermospheric response to the November 8-9, 1969, magnetic disturbances

Details Thermospheric response to the November 8-9, 1969, magnetic disturbances Thermospheric response to the November 8-9, 1969, magnetic disturbances

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.4207r&link_type=abstract

Journal of Geophysical Research, vol. 84, Aug. 1, 1979, p. 4207-4216.

Physics

1

Atmospheric Heating, Magnetic Storms, Thermosphere, Atmospheric Circulation, Ionospheric Currents, Meridional Flow, Ultraviolet Radiation

Scientific paper

Geomagnetic data from 82 Northern Hemisphere observatories were used to derive the hemispheric magnetic potential distribution and equivalent for a 36-hour geomagnetic storm period. The potential distribution is used to parameterize a time-dependent global distribution of high-latitude heating due to auroral processes. The high-latitude heating rate and the calculated EUV and UV heating rates are used in a numerical model of the zonally symmetric thermosphere to calculate the time-dependent mean meridional circulation and latitudinal temperature variation during the storm period. It is shown that high-latitude heating during substorms causes variability in the global thermospheric properties and circulation, and during two successive large substorms thermospheric waves are generated that propagate from high latitudes equatorward, producing global scale perturbations in the thermospheric properties and dynamics. A crude calibration of equivalent ionospheric current intensity to high-latitude heating is made with the requirement that the calculated global mean temperature response to the storm heating be consistent with empirical model predictions.

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