Variations in the atmospheric electric field at tropical station during 1930–1987 |
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| Authors: | S S Kandalgaonkar G K Manohar |
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| Institution: | Indian Institute of Tropical Meteorology, Pune-411005, India,Indian Institute of Tropical Meteorology, Pune-411005, India |
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| Abstract: | The variations noticed in the atmospheric electric field recorded at Pune (18°32′N, 73°51′E, 559 m ASL), a tropical inland
station located in Deccan Plateau, India, during the period 1930–1987, have been examined in relation to the variations observed
in the Angstrom turbidity coefficient (β) and selected meteorological parameters. The monthly and annual mean values of the atmospheric electric field, Angstrom turbidity
coefficient (β), rainfall, temperature and relative humidity for the years 1930–1938, 1957–1958, 1964–1965, 1973–1974 and
1987 were considered in the study.
The results of the above study indicated gradual increases in the atmospheric electric field over the period of study (1930–1987)
which is statistically significant at less than 5%level. The increases noticed during different periods varied from 30 to
109%. The increase noticed during the period (1930–1938) and (1973–1974) was maximum (109%). The Angstrom turbidity coefficient
also showed systematic increases during the period of study, which is consistent. The diurnal curve of the atmospheric electric
field at the station by and large, showed a double oscillation, which is generally observed in the continental environments. |
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