Excitation of the ionospheric resonance cavity by neutral winds at middle latitudes
A new mechanism for the ionospheric Alfvén resonator (IAR) excitation at middle latitudes is considered. It is shown that the ionosphere wind system in this region is capable of sustaining the generation of geomagnetic perturbations that can be detected by ground magnetometers. The gene...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2004-09-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/22/2877/2004/angeo-22-2877-2004.pdf |
| _version_ | 1819027265897365504 |
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| author | V. V. Surkov O. A. Pokhotelov M. Parrot E. N. Fedorov M. Hayakawa |
| author_facet | V. V. Surkov O. A. Pokhotelov M. Parrot E. N. Fedorov M. Hayakawa |
| author_sort | V. V. Surkov |
| collection | DOAJ |
| description | A new mechanism for the ionospheric Alfvén
resonator (IAR) excitation at middle latitudes is considered. It is shown
that the ionosphere wind system in this region is capable of sustaining the
generation of geomagnetic perturbations that can be detected by ground
magnetometers. The general IAR dispersion relation describing the linear
coupling of the shear Alfvén and fast magnetosonic/compressional modes
is obtained. The dependence of the IAR eigenfrequencies and damping rates on
the perpendicular wave number and on the ground conductivity during the
day- and nighttime conditions is analyzed both analytically and numerically. In
order to demonstrate the IAR excitation by neutral winds the power spectra
of the geomagnetic perturbation on the ground surface are calculated.
Furthermore, it is found that Kolmogorov spectra of the ionospheric
turbulent neutral winds and the IAR eigenfrequencies lie in the same
frequency range that make it possible to enhance the IAR excitation. The
relevance of the developed theoretical model to the ground-based
observations is stressed. |
| first_indexed | 2024-12-21T05:39:44Z |
| format | Article |
| id | doaj.art-6671a60522664d61afbb853a6e1e216b |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-21T05:39:44Z |
| publishDate | 2004-09-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-6671a60522664d61afbb853a6e1e216b2022-12-21T19:14:18ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762004-09-01222877288910.5194/angeo-22-2877-2004Excitation of the ionospheric resonance cavity by neutral winds at middle latitudesV. V. Surkov0O. A. Pokhotelov1M. Parrot2E. N. Fedorov3M. Hayakawa4Moscow State Engineering Physics Institute, 115409, Moscow, 31 Kashirskaya road, RussiaInstitute of Physics of the Earth, 123995 Moscow, 10 Bolshaya Gruzinskaya str., RussiaLaboratoire de Physique et Chimie de l’Environnement, Centre National de la Recherche Scientifique, Orléans, FranceInstitute of Physics of the Earth, 123995 Moscow, 10 Bolshaya Gruzinskaya str., RussiaThe University of Electro-Communications, Chofu, Tokyo, JapanA new mechanism for the ionospheric Alfvén resonator (IAR) excitation at middle latitudes is considered. It is shown that the ionosphere wind system in this region is capable of sustaining the generation of geomagnetic perturbations that can be detected by ground magnetometers. The general IAR dispersion relation describing the linear coupling of the shear Alfvén and fast magnetosonic/compressional modes is obtained. The dependence of the IAR eigenfrequencies and damping rates on the perpendicular wave number and on the ground conductivity during the day- and nighttime conditions is analyzed both analytically and numerically. In order to demonstrate the IAR excitation by neutral winds the power spectra of the geomagnetic perturbation on the ground surface are calculated. Furthermore, it is found that Kolmogorov spectra of the ionospheric turbulent neutral winds and the IAR eigenfrequencies lie in the same frequency range that make it possible to enhance the IAR excitation. The relevance of the developed theoretical model to the ground-based observations is stressed.https://www.ann-geophys.net/22/2877/2004/angeo-22-2877-2004.pdf |
| spellingShingle | V. V. Surkov O. A. Pokhotelov M. Parrot E. N. Fedorov M. Hayakawa Excitation of the ionospheric resonance cavity by neutral winds at middle latitudes Annales Geophysicae |
| title | Excitation of the ionospheric resonance cavity by neutral winds at middle latitudes |
| title_full | Excitation of the ionospheric resonance cavity by neutral winds at middle latitudes |
| title_fullStr | Excitation of the ionospheric resonance cavity by neutral winds at middle latitudes |
| title_full_unstemmed | Excitation of the ionospheric resonance cavity by neutral winds at middle latitudes |
| title_short | Excitation of the ionospheric resonance cavity by neutral winds at middle latitudes |
| title_sort | excitation of the ionospheric resonance cavity by neutral winds at middle latitudes |
| url | https://www.ann-geophys.net/22/2877/2004/angeo-22-2877-2004.pdf |
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