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Formation of Depressions in the Indian Seas and Lunar Phase

Abstract

IT was recently shown1 that the occurrence of heavy rainfall (10 in. and above in 24 h) is related to lunar phase. It will be evident that such heavy falls are mostly associated with depressions, some of which intensify into cyclones and severe cyclones. A study was therefore undertaken to examine the dates of formation of depressions in the Indian Seas vis-à-vis the lunar phase. This communication was prompted by Bradley's article “Tidal Components in Hurricane Development”2 and is intended to provide some additional information to support his conclusions.

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References

  1. Visvanathan, T. R., Ind. J. Meteorol. and Geophys.—Symp. “Hydrometeorology of India with Special Reference to Flood Forecasting and Warnings” (to be published).

  2. Bradley, D. A., Nature, 204, 138 (1964).

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  3. Tracks of the Storms and Depressions in the Bay of Bengal and Arabian Sea (Indian Meteorological Department, 1964).

  4. Carpenter, T. H., Decimal Ephemeris of the Sun and Moon (1870–1962) (U.S. Weather Bureau, Washington).

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VISVANATHAN, T. Formation of Depressions in the Indian Seas and Lunar Phase. Nature 210, 406–407 (1966). https://doi.org/10.1038/210406a0

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