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- W2554711944 abstract "A quasi-stationary two-dimensional model of electric fields and currents in the conductor that includes a thunderstorm cloud as well as the Earth's ground, atmosphere and ionosphere with specific features of equatorial ionosphere is created. A cloud is simu- lated as a long cylinder with elliptical cross-section with vertical and horizontal axes 10 km and 40 km respectively. The two-dimensional model is applied for two cases when such a long cloud is parallel or normal to the geomagnetic equator. Vertical external current about 10 10 A=m 2 is used in the model as a generator that creates voltage 10 MV between low and upper boundaries of the cloud. The height distribution of the components of the conduc- tivity tensor above the altitude of 90 km is calculated by the empirical models IRI, MSISE, IGRF. We use an empirical model by Rycroft and Odzimek below 50 km where the electric conductivity is isotropic and smooth interface between these regions. Conductivity inside a cloud is ten times decreased in accordance with the used empirical model. The steady state electroconductivity problem is solved numerically. The problem with Hall conductivity is harder from mathematical point of view. We use new statement of the problem that has a symmetrical positive definite operator in contrast with traditional problems for electric potential or current function. Electric fields and currents below 60 km do not depend on the geomagnetic field inclination. The main difference from high-latitude models appears when the cloud is parallel to the geomagnetic field lines. Then the field and current distributions are not symmetrical because of Hall conductivity. The incomes of these type clouds into the global electric net are analyzed." @default.
- W2554711944 created "2016-11-30" @default.
- W2554711944 creator A5015313690 @default.
- W2554711944 date "2014-01-01" @default.
- W2554711944 modified "2023-09-27" @default.
- W2554711944 title "ELECTRIC CURRENT PENETRATION FROM A THUNDERSTORM CLOUD INTO THE IONOSPHERE AT THE GEOMAGNETIC EQUATOR" @default.
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