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The global ionospheric response to a southward IMF turning
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Physics and Astronomy, Swedish Institute of Space Physics, Uppsala Division.
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In: Annales Geophysicae, ISSN 0992-7689Article in journal (Refereed) Submitted
URN: urn:nbn:se:uu:diva-90582OAI: oai:DiVA.org:uu-90582DiVA: diva2:162983
Available from: 2003-05-15 Created: 2003-05-15Bibliographically approved
In thesis
1. Substorm Features in the High-Latitude Ionosphere and Magnetosphere: Multi-Instrument Observations
Open this publication in new window or tab >>Substorm Features in the High-Latitude Ionosphere and Magnetosphere: Multi-Instrument Observations
2003 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The space around Earth, confined in the terrestrial magnetosphere, is to some extent shielded from the Sun's solar wind plasma and magnetic field. During certain conditions, however, strong interaction can occur between the solar wind and the magnetosphere, resulting in magnetospheric activity of several forms, among which substorms and storms are the most prominent. A general framework for how these processes work have been outlayed through the history of research, however, there still remain questions to be answered. The most striking example regards the onset of substorms, where both the onset cause and location in the magnetosphere/ionosphere are still debated. These are clearly not easily solved problems, since a substorm is a global process, ideally requiring simultaneous measurements in the magnetotail and ionosphere. Investigated in this work are temporal and spatial scales for substorm and convection processes in the Earth's magnetosphere and ionosphere. This is performed by combining observations from a number of both ground-based and spacecraft-borne instruments. The observations indicate that the magnetotail's cross-section is involved to a larger spatial extent than previously considered in the substorm process. Furthermore, convection changes result in topological changes of the magnetosphere on a fast time scale. The results show that the magnetosphere is, on a global magnetospheric scale, highly dynamic during convection changes and ensuing substorms.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2003. 50 p.
Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1104-232X ; 860
Space and plasma physics, Substorm, Convection, magnetosphere-ionosphere coupling, Rymd- och plasmafysik
National Category
Fusion, Plasma and Space Physics
Research subject
Space and Plasma Physics
urn:nbn:se:uu:diva-3478 (URN)91-554-5670-7 (ISBN)
Public defence
2003-06-05, Polhem, Ångström, Uppsala, 14:00 (English)
Available from: 2003-05-15 Created: 2003-05-15 Last updated: 2009-11-18Bibliographically approved

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