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Research areas

Analysis of data from multi-satellite geospace missions.
Spacecraft are the primary means to explore the Earth's space environment. Multi-spacecraft missions such as Cluster and Themis have significantly advanced our understanding of geospace as a complex physical system. Special data analysis techniques are required to study large scale current systems, plasma waves and boundaries. The three-satellite LEO mission Swarm is operated as a geomagnetic observatory in space and addresses the spatiotemporal variability of current systems in the auroral zone.

Auroral plasma physics and magnetosphere-ionosphere (M-I) coupling.
The upper (electrically conducting) layers of the Earth's atmosphere are coupled to remote magnetospheric regions through geomagnetic field lines which act as transmission channels for electrical currents, momentum, and energy between very different plasma regimes. Closely associated with this kind of interaction are magnetic storms, auroral emissions, and space weather effects. Plasma theory and numerical models allow to investigate M-I coupling phenomena. Optical observations of small-scale auroral forms give a vivid impression of the plasma dynamics in the M-I system.

Effects of geomagnetic variations on system Earth.
The geomagnetic field generated in the Earth's core reversed its orientation many times in Earth's history. The effects of geomagnetic variations on geospace can be studied by means of large-scale magnetohydrodynamic simulations and parametric models. Tracing of particle orbits in the resulting magnetic field configurations yields fluxes of high-energetic particles into the Earth's upper atmosphere which are used to model the production of cosmogenic nuclides and ozone depletion processes.

Jacobs University Bremen: Imprint/Impressum

Last modified: Thu Aug 11 17:10:23 CEST 2016