Pleasant Ways in ScienceProctor, Richard A. (Richard Anthony)
Science
Pleasant Ways in Science
Proctor, Richard A. (Richard Anthony)
Science
The Rev. Mr. Main, Director of the Radcliffe Observatory at Oxford,
found that westerly winds were slightly more common (as compared with
other winds) when sun-spots were numerous than when they were few.
Mr. Meldrum, of Mauritius, has made a series of statistical inquiries
into the records of cyclones which have traversed the Indian Ocean
between the equator and 34 degrees south latitude, in each year from
1856 to 1877, noting the total distances traversed by each, the sums
of their radii and areas, their duration in days, the sums of their
total areas, and their relative areas. His researches, be it marked
in passing, are of extreme interest and value, whether the suggested
connection between sun-spots and cyclones (in the region specified)
be eventually found to be a real one or not. The following are his
results, as described in _Nature_ by a writer who manifestly favours
very strongly the doctrine that an intimate association exists between
solar maculation (or spottiness) and terrestrial meteorological
phenomena:—
“The period embraces two complete, or all but complete, sun-spot
periods, the former beginning with 1856 and ending in 1867, and the
latter extending from 1867 to about the present time [1877]. The broad
result is that the number of cyclones, the length and duration of
their courses, and the extent of the earth’s surface covered by them
all, reach the maximum in each sun-spot period during the years of
maximum maculation, and fall to the minimum during the years of minimum
maculation. The peculiar value of these results lies in the fact that
the portion of the earth’s surface over which this investigation
extends, is, from its geographical position and what may be termed
its meteorological homogeneity, singularly well fitted to bring out
prominently any connection that may exist between the condition of the
sun’s surface and atmospheric phenomena.”
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