NORTH-SOUTH ASYMMETRY OF GEOMAGNETIC ACTIVITY AND SOLAR WIND ELECTRIC FIELD
Аннотация и ключевые слова
Аннотация (русский):
Geomagnetic activity asymmetry in the Northern and Southern hemispheres is studied. It is shown that the higher is the level of magnetic activity the greater is the asymmetry. It is found that the asymmetry in the hemispheres manifests itself in the 06–18-hour component of magnetic activity diurnal variation, while the asymmetry in the 00–12-hourly component is completely absent. The cause of geomagnetic north-south asymmetry is supposed to be meridional Pedersen current between high and middle latitudes in the ionosphere. A qualitative model of formation of asymmetry connected with the solar wind electric field is proposed.

Ключевые слова:
Geomagnetic activity, Earth’s magnetosphere, interplanetary magnetic field
Текст
Текст произведения (PDF): Читать Скачать
Список литературы

1. Cao J.B., Duan A., Dunlop M., Wei X., Cai C. Dependence of IMF By penetration into the neutral sheet on IMF Bz and geomagnetic activity. J. Geophys. Res. 2014, vol. 119, pp. 5279-5285. DOI:https://doi.org/10.1002/2014JA019827.

2. Danilov A.A. North-south asymmetry of geomagnetic activity. Geomagnetizm i Aeronomiya [Geomagnetism and Aero-nomy]. 1998, vol. 38, no. 3, pp. 39-46 (in Russian).

3. Geomagnetic Data. IAGA Bulletin 1972-1976, no. 32, a-h.

4. Iijima T., Potemra T.A. The amplitude distribution of field-aligned currents of northern high latitudes observed by Triad. J. Geophys. Res. 1976, vol. 81, pp. 2165-2174.

5. Ionospheric-magnetic disturbances at high latitudes / Ed. O.A. Troshichev. Leningrad: Gidrometeoizdat Publ., 1986. 256 p. (in Russian).

6. Petrukovich, A.A. Origins of plasma sheet By. J. Geophys. Res. 2011, vol. 116, A07217. DOI:https://doi.org/10.1029/2010JA016386.

7. Shelomentsev V.V. Correlation between the north-south asymmetry and IMF y-component. Issledovaniya po Geomagnetizmu, Aeronomii i fizike Solntsa [Research on Geomagnetism, Aeronomy and Solar Physics]. Moscow, Nauka Publ., 1977, iss. 43, pp. 55-59 (in Russian).

8. Siebert M. Magnetic activity differences between the two hemispheres following the sector structure of the interplanetary magnetic field. J. Geophys. Res. 1968, vol. 73, pp. 3049-3052.

9. Wilcox J.M. Asymmetry in the geomagnetic response to the polarity of the interplanetary magnetic field. J. Geophys. Res. 1968, vol. 73, pp. 6835-6836.

10. Yoshizawa K. Effect of the IMF-By component on the North-South asymmetry of geomagnetic activity. Planetary and Space Sci. 1986, vol. 34, pp. 639-644. DOI: 10.1016/ 0032-0633(86)90041-3.

Войти или Создать
* Забыли пароль?