The Similarity of the Short-Period Barometric Pressure Variations over Large Areas

Abstract

IT an earlier number of this Journal (vol. lxvi. p. 248, July 10, 1902), an account was given of the great similarity of curves representing many solar and meteorological phenomena,¹ and it was suggested that their close accordance indicated, not only the intimate relation between solar and meteorological changes, but the importance of the short-period (three to four years) variations common to them all. The variations of solar activity, as indicated by the greater or less number of spots or prominences or by the changes of latitude of the former, were suggested to have such an action on the atmospheric pressure on the earth's surface that when one place recorded an excess, another, nearly antipodal as regards position, showed a deficiency of pressure. Thus the regions specially referred to were those of India and that about Cordoba, in South America.