Long-term relationships between sunspots, Ca-plages and the ionosphere

Details Long-term relationships between sunspots, Ca-plages and the ionosphere Long-term relationships between sunspots, Ca-plages and the ionosphere

May 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jatp...45..285k&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 45, May 1983, p. 285-287.

Physics

Earth Ionosphere, Faculae, Solar Activity Effects, Solar Terrestrial Interactions, Sunspots, Magnetic Anomalies, Photosphere, Regression Analysis

Scientific paper

It is suggested that the area of Ca-plages, A(P), may be substituted for the area of photospheric faculae, A(F), in the calculation of foE and foF2. Values of the latter, calculated by means of the relationship given by Smith and King (1981), using A(P) and A(F) separately, are found to have a correlation as high as 0.988. Equations similarly showing the relationship between foF2 values, sunspot numbers, and Ca-plage area, have been obtained for several Indian subcontinent stations. While the sunspot number and Ca-plage area coefficients do not significantly change in the regression equation from one station to another, the constant term indicates a latitude variation which is similar to the geomagnetic anomaly.

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