参考文献:1. Alexeev, I.I., Regular magnetic field in the Earth’s magnetosphere (in Russian), / Geomag. Aeron., 1978, vol. 18, pp. 447-52. 2. Alexeev, I.I., The penetration of interplanetary magnetic and electric fields into the magnetosphere, / J. Geomag. Geoelectron., 1986, vol. 38, pp. 1199-221. window">CrossRef 3. Alexeev, I.I., Belenkaya, E.S., Kalegaev, V.V., and Lyutov, Yu.G., Electric fields and field-aligned current generation in the magnetosphere, / J. Geophys. Res., 1993, vol. 98, no. 3, pp. 4041-051. window">CrossRef 4. Alexeev, I.I., Kalegaev, V.V., Belenkaya, E.S., Bobrovnikov, S.Yu., Feldstein, Ya.I., and Gromova, L.I., Dynamic model of the magnetosphere: case study for January 9-2, 1997, / J. Geophys. Res., 2001, vol. 106, no. A11, pp. 25683-5693. window">CrossRef 5. Alexeev, I.I., Belenkaya, E.S., Bobrovnikov, S.Yu., and Kalegaev, V.V., Modelling of the electromagnetic field in the interplanetary space and in the Earth’s magnetosphere, / Space Sci. Rev., 2003, no. 107, pp. 7-6. 6. Belenkaya, E.S., Transient current systems, / Geomag. Aeron., 2003, vol. 43, no. 5, pp. 602-08. 7. Belenkaya, E.S., Transition current systems in the Earth’s and Saturn’s magnetospheres, / Geomag. Aeron., 2006, vol. 46, no. 5, pp. 555-62. window">CrossRef 8. Belenkaya, E.S., Alexeev, I.I., and Clauer, C.R., Fieldaligned current distribution in the transition current system, / J. Geophys. Res., 2004, vol. 109, no. A11207, doi:10.1029/2004JA010484. 9. Belenkaya, E.S., Cowley, S.W.H., and Kalegaev, V.V., The response of the high-latitude ionosphere to the solar-wind pressure jump with a southward IMF on January 10, 1997, / Geomag. Aeron., 2014, vol. 54, no. 2, pp. 203-06. window">CrossRef 10. Bhattarai, S.K., Lopez, R.E., Bruntz, R., Lyon, J.G., and Wiltberger, M., Simulation of the polar cap potential during periods with northward interplanetary magnetic field, / J. Geophys. Res., 2012, vol. 117, no. A04219, doi:10.1029/2011JA017143. 11. Blomberg, L.G., Cumnock, J.A., Alexeev, I.I., Belenkaya, E.S., Bobrovnikov, S.Yu., and Kalegaev, V.V., Transpolar aurora: time evolution, associated convection patterns, and a possible cause, / Ann. Geophys., 2005, vol. 23, pp. 1917-930. window">CrossRef 12. Borodkova, N.L., Zastenker, G.N., Ryazantseva, M.O., and Richardson, J., Large and sharp changes of solar wind dynamic pressure and disturbances of the magnetospheric magnetic field at geosynchronous orbit caused by these variations, / Cos. Res., 2006, vol. 44, no. 1, pp. 3-1. 13. Boudouridis, A., Zesta, E., Lyons, R., Anderson, P.C., and Lummerzheim, D., Effect of solar wind pressure pulses on the size and strength of the auroral oval, / J. Geophys. Res., 2003, vol. 108(A4), p. 8012, doi:10.1029/2002JA009373. window">CrossRef 14. Boudouridis, A., Zesta, Lyons, L.R., Anderson, P.C., and Lummerzheim, D., Enhanced solar wind geoeffectiveness after a sudden increase in dynamic pressure during southward IMF orientation, / J. Geophys. Res., 2005, vol. 110, no. A05214, doi:10.1029/2004JA010704. 15. Boudouridis, A., Lyons, L.R., Zesta, E., Ruohoniemi, J.M., and Lummerzheim, D., Nightside flow enchancement associated with solar wind dynamic pressure driven reconnection, / J. Geophys. Res., 2008, vol. 113, no. A12211, doi:10.1029/2008JA013489. 16. Boudouridis, A., Lyons, L.R., Zesta, E., Weygand, J.M., Ribeiro, A.J., and Ruohoniemi, J.M., Statistical study of the effect of solar wind dynamic pressure fronts on the dayside and nightside ionospheric convection, / J. Geophys. Res., 2011, vol. 116, no. A10233, doi:10.1029/2011JA016582. 17. Boyle, C.B. and Reiff, P.H., Empirical polar cap potentials, / J. Geophys. Res., 1997, vol. 102, no. A1, pp. 111-25. window">CrossRef 18. Brittnacher, M., Wilber, M., Fillingim, M., Chua, D., Parks, G., Spann, J., and Germany, G., Global auroral response to a solar wind pressure pulse, / Adv. Space Res., 2000, vol. 25, no. 7/8, pp. 1377-385.
文摘
Sharp changes of the solar wind parameters determining the dynamic pressure jump lead to strong magnetosphere-ionosphere disturbances. Here the effect on the Earth’s ionospheric high latitudes of the solar wind dynamic pressure pulse caused only by the increase of the interplanetary plasma density under southward constant IMF is considered. We investigate reaction of the cross-polar cap potential on the increase of AL index and/or jump of the solar wind density. It is found that for the case of 10 January 1997 the main contribution to the polar cap potential drop increase gave the growth of AL index relative to the input of the solar wind density jump. We also study the influence of the solar wind density increase on the crosspolar cap potential for the quiet magnetospheric conditions. It occurred that the polar cap potential difference decreases with the great increase of the interplanetary plasma density. For the disturbed magnetosphere the main role in the polar cap potential drop increase plays increase of AL. Thus, we found the change of the cross-polar cap potential due to the AL index variations and/or the solar wind density drop even in a case when the interplanetary electric field is constant.