Mathematics – Logic
Scientific paper
Apr 1871
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1871natur...3..488c&link_type=abstract
Nature, Volume 3, Issue 77, pp. 488 (1871).
Mathematics
Logic
Scientific paper
IN the recent discussions on the influence of barometric pressure upon ocean currents, I have not seen any allusion to the observations that have been made upon the effect of variations of barometric pressure upon the sea-level. In a memoir by M. Ch. Aimé, ``Sur les variations de niveau de la Mediterranée,'' in the Annales de Chimie, tome xii., 1844, it is stated that a fall in the barometer is pretty uniformly accompanied by a rise in the sea-level to about thirteen times its amount. The Report of the British Association for 1841 contains a letter from my old friend, Mr. T. G. Bunt, of Bristol, stating that his observations upon the tide-gauge under his charge led him to conclude that a fall of one inch in the mercurial column was accompanied by an average rise of about 13½ inches in the high-water level. And the same industrious and careful observer, in a recent ``Discussion of Tide Observations at Bristol'' in the Philosophical Transactions for 1867, gives as the mean result of twenty-one years' examination of this point, ``12.772 inches of tide to one inch of mercury.'' I referred to Mr. Bunt's observations in a discussion at the Geological Society (March 6, 1867) on a paper by the Earl of Selkirk ``On some sea-water-level marks on the coast of Sweden,'' pointing out that some of the discrepancies in the observations as to the sea-level of the Baltic might be attributed without improbability to variations in barometric pressure. I have since learned from Admiral Key, who served in the Baltic fleet during the Russian war, that he had been led by his own observations to a like conclusion. And I find it stated in the description of the Baltic Sea, in the English Cyclopædia, that its level is sometimes observed to rise, and to remain thus elevated for a time without any obvious cause, two or three feet, of which phenomenon the explanation is probably the same.
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