Abstract
IN a communication dealing with the behaviour of the present sunspot cycle, Visser1 states that the changes in an unspecified ionospheric index are nearly independent of the simultaneous changes in the relative sunspot number, and, in particular, that the rapid increase in the sunspot number in 1957 was not accompanied by a corresponding increase in the ionospheric index.
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References
Visser, S. W., Nature, 182, 253 (1958).
Minnis, C. M., and Bazzard, G. H., J. Atmos. Terr. Phys. (in the press).
Minnis, C. M., J. Atmos. Terr. Phys., 7, 310 (1955).
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MINNIS, C. Behaviour of the Present Sunspot Cycle. Nature 182, 1599–1600 (1958). https://doi.org/10.1038/1821599a0
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DOI: https://doi.org/10.1038/1821599a0
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