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QUARTERLY JOURNAL 01 THB ROYAL METEOROLOGICAL SOCIETY JANUARY, 1929 [No. 229 VOL. sj.] ON THE ASSOCIATION OF THE DIURNAL VARIATION OF ELECTRIC POTENTIAL GRADIENT IN FINE WEATHER IVITH THE DISTRIBUTION OF THUNDERSTORMS OVER THE GUOBE. By 1;. J. W. \VHIPPLE, Sc.D., F.R.Met.Soc. [Manuscript received October 8, 192S-Read November 21. 1928.1 I. ISTRODUCTION. In fine weather the diurnal variation of electric potential gradient shows at most places a double oscillation in the course of the twenty-four hours. At Kew Observatory, for example, the potential gradient is high in the evening at 2011. and in the morning at gh. ; it is low in the early morning and in the early afternoon. The two maxima are about equal, but the morning minimum is the lower. In the polat regions however where, especially in winter, the meteorological elements change but little during the day, the variation of potential gradient is of a simpler type with only one masimum and one minimum. The observations at seven places, four in the Arctic regions and three in the Antarctic, were compared by Hoffmann when he published' the results obtained in Spitzbergen in 1913-14. Hoffmann noticed that when the observatioiis at the several stations were referred
The Quarterly Journal of the Royal Meteorological Society – Wiley
Published: Jan 1, 1929
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