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To directly driven and loading-unloading processes during substorm
IZMIRIAN, Troitsk, Russia.
IZMIRIAN, Troitsk, Russia.
IZMIRIAN, Troitsk, Russia.
KTH, Superseded Departments, Alfvén Laboratory. KTH, School of Electrical Engineering (EES), Space and Plasma Physics.
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1996 (English)In: European Space Agency, (Special Publication) ESA SP, ISSN 03796566 (ISSN), no 389, 69-74 p.Article in journal (Refereed) Published
Abstract [en]

Model calculations of the electric fields in the high-latitude ionosphere are compared to measurements made by the Viking satellite during August 3, 1986 pass. The model calculations are based on the IZMEM procedure, where the electric field and currents in the ionosphere are given as functions of the interplanetary magnetic field (IMF). The event chosen correspond to the growth phase of substorm. The correlation between the model results and the satellite data is high, which assumes directly driven of the magnetosphere by the solar wind. Similar high correlation exists between the electric field in the solar wind (V*Bs) and AL magnetic activity indices, if time delays between the V*Bs observations in space and magnetic activity above the Earth's ground are taken into account. It is concluded, that the directly driven response of the magnetosphere to highly variable solar wind electric field is the main feature of geomagnetic activity at high latitudes.

Place, publisher, year, edition, pages
1996. no 389, 69-74 p.
National Category
Fusion, Plasma and Space Physics
URN: urn:nbn:se:kth:diva-91721OAI: diva2:511113
References: Akasofy, S.-I., Interplanetary energy flux associated with magntosphere substorms (1979) Planet. Space Sci., 27, pp. 425-431; Akasofy, S.-I., Energy coupling between the solar wind and the magnetosphere (1981) Space Sci. Rev., 28, pp. 121-190; Baker, D.N., Magnetospheric response to the IMF. Substorms (1986) J. Geomagn. Geoelectr., 38, pp. 1047-1073; Baker, D.N., Substorms in the magnetosphere (1984) Solar-Terrestrial Physics: Present and Future, 1120, pp. 8-13. , ed. by D M Butter & K Paradopoulos, NASA Ref. Publ; Feldstein, Y.I., Electromagnetic characteristics of the high-latitude ionosphere during the various phases of magnetic substorms (1996) J. Geophys. Res., , in press; Feldstein, Y.I., Levitin, A.E., Solar wind control of electric field and currents in the ionosphere (1986) J. Geomagn. Geoelectr., 38, pp. 1143-1182; Papitashvili, V.O., Electric potential patterns in the northern and southern polar regions parametrized by the interplanetary magnetic field (1994) J. Gephys. Res, 99, pp. 13251-13262; Kamei, T., (1991) Data Book N20, , World Data Center C2 for Geomagnetism, Kyoto, Japan; McPherron, R.L., Growth phase of magnetospheric substorms (1970) J Geophys. Res, 75, pp. 5592-5599; Feldstein, Y.I., Night-time aurora and its relation to the magnetosphere (1974) Ann. Geophys., 30, pp. 259-272; Lindqvist, P.-A., Marklund, G.T., A statistical study of high-latitude electric fields measured on the Viking satellite (1990) J Geophys. Res., 95, pp. 5867-5876; Baker, D.N., Driven and unloading aspects of magnetospheric substorms (1992) Proceeding of the ICS-I, pp. 185-191. , Kiruna, Sweden, ESA SP-335; Akasofy, S.-I., Assessing the magnetic reconnection paradigm (1994) EOS, 75, pp. 249-252; Baker, D.N., Re-examination of driven and unloading aspects of magnetospheric substorms (1993) Adv. Space Res., 13 (N4), pp. 75-83; Blanchard, G.T., McPherron, R.L., Analysis of the linear response function relating AL to V*Bs for individual substorms (1995) J. Geophys. Res., 100, pp. 19155-19165; Prichard, D., Comment on "Substorm recurrence during steady and variable solar wind driving: Evidence for a normal mode in the unloading dynamics of the magnetosphere" (1995) J. Geophys. Res., 100, pp. 21995-22001. , by A J Klimas, D N Baker, D Vassiliadis, and D A Roberts; Reply NR 20140805Available from: 2012-03-20 Created: 2012-03-20 Last updated: 2012-03-20Bibliographically approved

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