Temporal variations of the global lightning activity deduced from the Schumann resonance data |
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| Institution: | 1. Facultad de Ingeniería, Universidad Nacional de Cuyo, Parque General San Martín, Ciudad Universitaria, Mendoza CPM5502JMA, Argentina;2. Facultad de Ciencias Exactas y Naturales, Universidad de Cuyo, Mendoza CPM5502JMA, Argentina;3. Facultad Regional San Rafael, Universidad Tecnológica Nacional, Avda. Urquiza 314, San Rafael, Mendoza M5602GCH, Argentina;4. Dirección de Agricultura y Contingencias Climáticas, Gobierno de Mendoza, San Martín 1850, Mendoza M5560EWS, Argentina;5. Facultad de Ingeniería, Universidad Austral, Mariano Acosta 191, Pilar, Provincia de Buenos Aires B1629ODT, Argentina;6. IFIBA, CONICET, Ciudad Universitaria, Buenos Aires C1428EGA, Argentina;1. Institute of Applied Physics, Russian Academy of Sciences, 46 Ulyanova St., 603950 Nizhny Novgorod, Russia;2. Lobachevsky State University of Nizhny Novgorod, 23 Prospekt Gagarina, 603022 Nizhny Novgorod, Russia |
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| Abstract: | Temporal variations of the global lightning activity were deduced from long-term Schumann resonance (SR) continuous records. The intensities of the horizontal magnetic field component in the vicinity of the first, second, and third SR modes were monitored at Tottori observatory (35.5°N, 134.33°E) from 1968. Variations of the effective source-observer distance were estimated using the ratios of the intensities of individual modes. This allowed us to obtain average diurnal variations of the global lightning activity for each month over a one-year period. The results show that the distances estimated between the field-site and the effective source are very stable, while the temporal changes of the fields and the global lightning intensity derived demonstrate substantial variability. |
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