Abstract
THE number of days with rain, in summer, at Greenwich, during most of this century, has been subject to a pretty regular fluctuation. The curve (from 1825) having been smoothed by means of five-year averages, we obtain that shown in the diagram. And putting with it a curve of sun-spots, we find a strikingly definite correspondence (somewhat “lagging” in character) throughout at least four of the sun-spot cycles, the rain day maxima coming soon after the sun-spot maxima, and rain day minima soon after sun-spot minima. In recent years, however, the curves appear to have got out of step (so to speak) with each other; so that, e.g. we find a rain day maximum in 1880, two years after the sun-spot minimum of 1878, and a rain day minimum in 1885, two years after the sun-spot maximum of 1883.
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M., A. The Weather of Summer. Nature 47, 245–246 (1893). https://doi.org/10.1038/047245d0
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DOI: https://doi.org/10.1038/047245d0
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