Труды сотрудников ИВМ СО РАН

[Text] / M. Ampferer [et al.] // Ann. Geophys. - 2010. - Vol. 28, Is. 3. - pp. 779-787. - Cited References: 30. - This work is supported by grants 07 05 00135, 09-06-91000 from the Russian Foundation for Basic Research and by the Program 16.3 of the Russian Academy of Sciences. Additional support is due to the Austrian "Fonds zur Forderung der wissenschaftlichen Forschung" under Project I193-N16 and the "Verwaltungsstelle fur Auslandsbeziehungen" of the Austrian Academy of Sciences. The authors are grateful to the referees whose comments helped considerably to improve the paper. . - ISSN 0992-7689РУБ Astronomy & Astrophysics + Geosciences, Multidisciplinary + Meteorology & Atmospheric Sciences

Аннотация: It is well known that lithospheric electromagnetic emissions are generated before earthquakes occurrence. In our study, we consider the physical penetration mechanism of the electric field from the Earth's surface, through the atmosphere-ionosphere layers, and until its detection in space by satellites. A simplified approach is investigated using the electric conductivity equation, i.e., del((sigma) over cap.del Phi) = 0 in the case of a vertical inclination of the geomagnetic field lines. Particular interest is given to the conductivity profile near the ground and the electric field distribution at the Earth's surface. Our results are discussed and compared to the models of Pulinets et al. (2003) and Denisenko et al. (2008). It is shown that the near ground atmospheric layer with low conductivity decreases the electric field penetration into the ionosphere. The model calculations have demonstrated that the electric field of lithospheric origin is too weak to be observed at satellite altitudes.


Доп.точки доступа:
Ampferer, M.; Denisenko, V.V.; Денисенко, Валерий Васильевич; Hausleitner, W.; Krauss, S.; Stangl, G.; Boudjada, M.Y.; Biernat, H.K.

[Text] / V. V. Denisenko, E. V. Pomozov // Geomagn. Aeron. - 2011. - Vol. 51, Is. 7. - P866-872, DOI 10.1134/S0016793211070048. - Cited References: 13. - The work was supported by the Russian Foundation for Basic Research, project no. 09-06-91000. The authors are grateful to A.A. Namgaladze for a substantive, although not consensus-inducing, discussion of the work, as well as to colleagues from the Institute of Cosmic Research of the Austrian Academy of Sciences, with whom jointly this cycle of studies was carried out. . - ISSN 0016-7932РУБ Geochemistry & Geophysics

Аннотация: A mathematical model has been proposed for describing quasi-stationary atmospheric electric fields with approximate, but fairly accurate allowance for ionospheric conductivity. It is shown that some well-known models of electric field penetration from the Earth into the ionosphere have been deemed inadequate, though they work well in the atmosphere below 50 km. In these models, the arbitrarily specified boundary condition in the upper boundary of the atmosphere omits the existing good conductor or adds not existent conductor. The maximum possible field in our model is far less than in models where ionospheric conductivity is not taken into account, but vastly larger than in models based on the approximation with infinite Pedersen conductivity in the upper ionosphere.


Доп.точки доступа:
Pomozov, E.V.; Помозов, Егор Владимирович; Денисенко, Валерий Васильевич

[Text] / E. V. Pomozov // Geomagn. Aeron. - 2014. - Vol. 54, Is. 1. - P127-134, DOI 10.1134/S0016793213060121. - Cited References: 26. - This work was supported by the Russian Foundation for Basic Research, projects nos. 07-05-00135 and 12-05-00152. . - ISSN 0016-7932. - ISSN 1555-645XРУБ Geochemistry & Geophysics

Аннотация: In the used model, the quasistationary electric field in the atmosphere of the Earth is obtained by solving the conductivity equation. The penetration characteristics of the electric field from the Earth's surface into the ionosphere depend on both atmospheric and ionosphere conductivity. The ionosphere is taken into account by setting a special condition on the upper boundary of the atmosphere. The influence of the atmospheric surface layer with a reduced conductivity on the penetration of the electric field from the surface of the Earth into the ionosphere is analyzed.

WOS

Держатели документа:
Russian Acad Sci, Inst Computat Modeling, Siberian Branch, Krasnoyarsk 660033, Russia
ИВМ СО РАН

Доп.точки доступа:
Pomozov, E.V.; Помозов, Егор Владимирович; Russian Foundation for Basic Research [07-05-00135, 12-05-00152]