Библиографическое описание:Ionospheric conductivity effects on electrostatic field penetration into the ionosphere / V. V. Denisenko [et al.]. - Текст : непосредственный // Nat. Hazards Earth Syst. Sci. - 2008. - Vol. 8, Is. 5. - P. 1009-1017. - Cited Reference Count: 60. - Гранты: This work is supported by grant 07-05-00135 from the Russian Foundation for Basic Research and by the Programs 16.3 and 2.16 of the Russian Academy of Sciences. Further support is due to the Austrian "Fonds zur Forderung der wissenschaftlichen Forschung" under project P20145-N16. We acknowledge support by the Austrian Academy of Sciences, "Verwaltungstelle fur Auslandsbeziehungen", and the Russian Academy of Sciences. Part of this research was done during academic visits of V. V. 'Denisenko to the Space Research Institute of the Austrian Academy of Sciences in Graz as well as during an academic visit of H. K. Biernat to the Institute of Computational Modelling of the Russian Academy of Sciences in Krasnoyarsk. - Финансирующая организация: Russian Foundation for Basic Research and by the Programs [07-05-00135]; Russian Academy of Sciences [16.3, 2.16]; Austrian "Fonds zur Forderung der wissenschaftlichen Forschung [P20145-N16]; Austrian Academy of Sciences. - ISSN 1561-8633.
Аннотация:The classic approach to calculate the electrostatic field penetration, from the Earth's surface into the ionosphere, is to consider the following equation del. ((sigma) over cap del Phi) =0 where (sigma) over cap and Phi are the electric conductivity and the potential of the electric field, respectively. The penetration characteristics strongly depend on the conductivities of atmosphere and ionosphere. To estimate the electrostatic field penetration up to the orbital height of DEMETER satellite (about 700 km) the role of the ionosphere must be analyzed. It is done with help of a special upper boundary condition for the atmospheric electric field. In this paper, we investigate the influence of the ionospheric conductivity on the electrostatic field penetration from the Earth's surface into the ionosphere. We show that the magnitude of the ionospheric electric field penetrated from the ground is inverse proportional to the value of the ionospheric Pedersen conductance. So its typical value in day-time is about hundred times less than in night-time.
