Lightning electrical characteristics during tropical summer thunderstorm in North-East India |
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| Authors: | A Guha BK De |
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| Institution: | 1. Laboratoire de l''Atmosphère et des Cyclones, UMR 8105 CNRS/Météo-France/Université de La Réunion, 15 avenue René Cassin, CS 92003, 97744 Saint Denis Cedex 09, La Réunion, France;2. Laboratoire d''Aérologie, UMR 5560 CNRS/Université de Toulouse, 14 avenue Edouard Belin, 31400 Toulouse, France;1. Centre for the Research and Technology of Agro-Environmental and Biological Sciences, Physics Department, University of Trás-os-Montes e Alto Douro, Vila Real, Portugal;2. Instituto Português do Mar e da Atmosfera, Lisboa, Portugal;3. Centre for Geographical Studies, Institute of Geography and Spatial Planning, University of Lisbon, Lisbon, Portugal;4. Institute of Mediterranean Agrarian and Environmental Sciences (ICAAM), Group Water, Soil and Climate, University of Évora, Évora, Portugal;5. Geophysical Institute, University of Bergen, Bergen, Norway;1. S. K. Mitra Centre for Research in Space Environment, Institute of Radio Physics and Electronics, University of Calcutta, 92 Acharya Prafulla Chandra Road, Kolkata 700009, India;2. Department of Atmospheric Sciences, University of Calcutta, 51/2 Hazra Road, Kolkata, India;3. Regional Meteorological Centre, Kolkata, India;1. Centre for Atmospheric and Oceanic Sciences, Indian Institute of Science, Bangalore, India;2. Divecha Centre for Climate Change, Indian Institute of Science, Bangalore, India;3. Department of Atmospheric Sciences, University of Washington, Seattle, WA, USA;4. Swiss Re Private Limited, Bangalore, India |
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| Abstract: | The preliminary results of observation of the lightning electrical characteristics during tropical summer thunderstorms locally known as “Nor-Wester”, at a hilly place in North-East India (23.50°N, 91.25°E) are reported here. Some distinct peaks are observed in the VLF range between 1.5 to 6 kHz. Average cloud conductivity is found to be 8.12×10?10 S m?1. Specific characteristics of integrated field intensity of sferics (IFIS) at 14 and 17 kHz are also studied. Average enhancement of electrical activity during thunderstorms is found to be 170 dB kHz?1 compared to the normal weather sferics intensity. |
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