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Studies of paleomagnetospheric processes.
The geomagnetic field generated in the Earth's core reversed
its orientation many times in Earth's history. The effects on the
magnetosphere can be studied by means of large-scale magnetohydrodynamic
simulations and parametric models. Tracing of particle orbits in such
exotic 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.
Analysis of data from magnetospheric
satellite missions.
Spacecraft are the primary means to explore the Earth's magnetosphere.
A cornerstone mission is Cluster-II which consists of four spacecraft
probing the outer magnetosphere, its boundary layers, and the solar wind.
Special analysis techniques have to be developed for such
multi-satellite missions.
Magnetosphere-ionosphere 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 magnetosphere-ionosphere coupling phenomena.
Optical observations of auroral curls and
other small-scale auroral forms.
Auroral emissions come in a rich variety of forms and colors.
Among the most fascinating phenomena are rapidly evolving small-scale
auroral forms like curls which can be resolved in optical observations
using light-intensified camera systems. Modern image processing techniques
allow to analyze such events in detail and to put models to a test.
Postal address:
P.O. Box 750561
28725 Bremen
Germany
Visitor's address:
Campus Ring 8
28759 Bremen
Germany
Phone: +49-421-200-3252
Fax: +49-421-200-3229
Email: j.vogt at jacobs-university.de