A quasi-DC model of electric fields in the ionosphere-ground region due to electrified clouds |
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| Institution: | 1. University of Chicago, Chicago, IL, USA;2. University of Texas at Dallas, Richardson, TX, USA;3. East China Normal University, Shanghai, China;1. Department of Biochemistry, Indian Institute of Science, Bangalore 560012, India;2. Department of Experimental and Clinical Medicine “G Salvatore”, University of Catanzaro Magna Graecia, Catanzaro 88100, Italy;1. Univ Lyon, INSA-Lyon, Laboratoire Vibrations Acoustique, F-69621 Villeurbanne, France;2. Univ Lyon, École Centrale de Lyon, Laboratoire de Mécanique des Fluides et d''Acoustique, UMR CNRS 5509, F-69134, Écully, France;3. Institute of Multimedia Communications and Signal Processing, University of Erlangen-Nuremberg, Cauerstaβe 7, D-91058 Erlangen, Germany;1. Department of Physical Sciences, Landmark University, PMB 1001, Omu-Aran, Kwara State, Nigeria;2. Department of Physics, Olabisi Onabanjo University, P.M.B. 2002, Ago Iwoye, Nigeria;1. Democritus University of Thrace (DUTH), Production and Management Engineering Department, Materials Laboratory, 67100 Xanthi Greece;2. Helmholtz-Zentrum Berlin für Materialien und Energie, Glinkener Str 1, 64287 Berlin, Germany;3. Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-70569 Stuttgart, Germany |
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| Abstract: | The penetration of the quasi-DC electric fields, E due to electrified clouds, into the middle- and high-latitude ionosphere is theoretically studied during the initial stage of cloud charge separation. The electrification process is characterized by a source function S(t), whose variations are on the time scale of the relaxation process in the cloud. A first-order approximation solution for the time variation of E is obtained as an explicit function of the electric field in the steady-state case. Some features of the time variations of E at different altitudes (in the ionosphere and also in the atmosphere) are investigated, depending on the source function and the relaxation time constants. This result can also be applied for slowly electrifying clouds which do not produce lightning. |
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