Analysis of high-latitude current systems during the BEAR experiment based on the IZMEM model |
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Authors: | A E Levitin L I Gromova L A Dremukhina N A Pal’shin |
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Institution: | (1) Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radiowave Propagation (IZMIRAN), Russian Academy of Sciences, Troitsk, Moscow oblast, 142190, Russia;(2) Shirshov Institute of Oceanology, Russian Academy of Sciences, Nakhimovskii pr. 23, Moscow, 117218, Russia |
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Abstract: | Based on the model of large-scale high-latitude current systems developed at IZMIRAN (IZMEM model), it has been indicated that auroral electrojets and current systems concentrated in the polar cap were the generators of long-period geomagnetic variations during the BEAR experiment on the electromagnetic field registration at the Scandinavian test site on June 1–July 15, 1998. Precisely circumpolar current systems, prevailing in the high-latitude ionosphere during the periods of a quiet magnetospheric state, which is characterized by the presence of the northern vertical (B z >0) component of the IMF vector in the solar wind, are responsible for the magnetotelluric fields. |
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