Abstract
IN a “Brief Sketch of the Meteorology of the Bombay Presidency in 1878,” Mr. F. Chambers opens a discussion of no little importance regarding certain relations subsisting among the meteorological phenomena of India. In that year the rainfall nearly everywhere throughout the Presidency was in excess of the normal quantity, and remarkably well distributed. No long-continued period of unusually dry weather was experienced in any district from the beginning of July to the end of the mon soon, the year being in this respect strikingly different from 1877 with its drought and terrible famine which followed in its footsteps. From a comparison of the weather phenomena of these two years, it is shown that the abnormal change of barometric pressure in July, 1878, as contrasted with July, 1877, was a fall of 0.068 inch, and the rainfall was 107 per cent, of the average fall greater in the latter than in the former month; in other words, the proportionate increase of rainfall corresponding to a fall in the pressure of 0.l00 inch, was nearly 16 per cent. of the average fall. It is evident that if the extension of this inquiry to past and future years and to the whole of India, should confirm this important relation between the atmospheric pressure and the rainfall over their extensive region, or establish similar relations, the discovery will be of the utmost value in assisting towards the formation of forecasts of the probable character of coming monsoons.
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Meteorological Notes . Nature 21, 384–385 (1880). https://doi.org/10.1038/021384a0
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DOI: https://doi.org/10.1038/021384a0