Search for dissertations about: "IONOSPHERE COUPLING"
Showing result 1 - 5 of 10 swedish dissertations containing the words IONOSPHERE COUPLING.
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1. New Perspectives on Solar Wind-Magnetosphere Coupling
Abstract : The streaming plasma in the solar wind is a never ending source of energy, plasma, and momentum for planetary magnetospheres, and it continuously drives large-scale plasma convection systems in our magnetosphere and over our polar ionosphere. This coupling between the solar wind and the magnetosphere is primarily explained by two different processes: magnetic reconnection at high latitudes, which interconnects the interplanetary magnetic field (IMF) with the planetary dipole field, and low-latitude dynamos such as viscous interaction, where the streaming plasma in the solar wind may trigger waves and instabilities at the flanks of the magnetosphere, and thereby allow solar wind plasma to enter into the system. READ MORE
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2. Substorm Features in the High-Latitude Ionosphere and Magnetosphere : Multi-Instrument Observations
Abstract : 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. READ MORE
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3. Alfvén Waves and Energy Transformation in Space Plasmas
Abstract : This thesis is focused on the role of Alfvén waves in the energy transformation and transport in the magnetosphere. Different aspects of Alfvén wave generation, propagation and dissipation are considered. The study involves analysis of experimental data from the Freja, Polar and Cluster spacecraft, as well as theoretical development. READ MORE
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4. Ion escape from Mars : measurements in the present to understand the past
Abstract : Present-day Mars is a cold and dry planet with a thin CO2-dominated atmosphere comprising only a few mbar pressure at low altitudes. However, the Martian surface is marked with valley networks, hydrated mineral clays, carbonates and the remains of deltas and meandering rivers, i.e. READ MORE
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5. Energization and Acceleration of Dayside Polar Outflowing Oxygen
Abstract : This thesis deals with energetic oxygen ions (i.e. single-charged atomic oxygen ions, O+) at altitudes higher than 5 Earth radii (RE) and at latitudes above 75 (toward 90) degrees invariant latitude (deg ILAT) in the dayside polar magnetosphere observed by Cluster. READ MORE
