Observations of Linear and Non-Linear Alfven Waves

Details Observations of Linear and Non-Linear Alfven Waves Observations of Linear and Non-Linear Alfven Waves

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsm34a..06a&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SM34A-06

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2407 Auroral Ionosphere (2704)

Scientific paper

Much of the theories and simulations of Alfven waves today are based on linear physics. When observing the effects of small-scale Alfven waves it is clear that linear studies cannot explain all the observed features. It is clear that the Alfven waves close to the ionosphere are often non-linear. Therefore, observed small-scale Alfven waves will in an attempt be graded to indicate how non-linear each observed wave is. The data from the FAST satellite (particle, electric and magnetic field information) will used. In this presentation we will present the methods are used to grade the waves and then present how well each parameters can separate out the waves. The large goal of this study is to provide with observational information how an assumed linear small scale Alfven wave behaves and then contrasting it to a non-linear Alfven wave through a large statistical study. Such statistical study will also provide information of under which circumstances one or the other wave type is most likely to develop.

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