Physics
Scientific paper
Jul 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.5815e&link_type=abstract
Journal of Geophysical Research, vol. 86, July 1, 1981, p. 5815-5818. Research supported by the Australian Research Grants Comm
Physics
1
Geomagnetism, Ionospheric Electron Density, Midlatitude Atmosphere, Annual Variations, Correlation Coefficients, Diurnal Variations, Equinoxes, Summer, Winter
Scientific paper
A correlation study of the geomagnetic conjugate effects in the ionospheric total electron content carried out between Shemya, Alaska and Beveridge, Australia is discussed. In the study, the seasonal, diurnal, and magnetic activity dependence of the correlation is determined. It is found that for equinoxes during low magnetic activity the correlation is positive during local afternoon and negative during local night to local morning hours. For the early winter-summer conjugate study, the correlation is for the most part positive during the local daytime and negative during local nighttime. For later winter-summer, the correlation is for the most part low, oscillating about zero throughout the day. With higher magnetic activity, the correlation is generally positive throughout the day during equinoxes, dropping below zero for about 3 hours around local sunrise. A similar result is true for later winter-summer. However, early winter-summer shows significant positive correlation only during local afternoon hours. An investigation of equinoctial and winter-summer geomagnetically conjugate storm effects shows that while equinoctial storm effects can occur simultaneously in both hemispheres, the seasonal differences between winter and summer storms tend to dominate during solstice storms.
Essex Elizabeth A.
Klobuchar John A.
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