Real-Life Turbulence in Earth’s Magnetosphere: Are We There Yet?

Details Real-Life Turbulence in Earth’s Magnetosphere: Are We There Yet? Real-Life Turbulence in Earth’s Magnetosphere: Are We There Yet?

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm42b..06u&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM42B-06

Physics

Plasma Physics

[2772] Magnetospheric Physics / Plasma Waves And Instabilities, [2788] Magnetospheric Physics / Magnetic Storms And Substorms, [4490] Nonlinear Geophysics / Turbulence, [7839] Space Plasma Physics / Nonlinear Phenomena

Scientific paper

This talk focuses on unsolved problems of plasma turbulence standing in the contemporary magnetospheric research and space plasma physics in general. Among such problems are the violation of the homogeneity assumption across vast ranges of scales, the absence of well-defined steady states, a time-dependent driving, nontrivial finite-size scaling, dominating boundary effects, coexistence of direct and inverse energy cascades, negative dissipation, drastically different physical principles governing plasma in adjacent phase-space domains, topological complexity, etc. Based on the analysis of these effects, it is argued that the real-life turbulence in Earth’s magnetosphere is inherently non-stationary, non-ergodic, and non-universal. The role of simple solvable mathematical models describing fundamental aspects of plasma complexity beyond the existing turbulence theories is discussed, and the necessity of new data analysis tools for quantifying stochastic transient processes associated with local and global magnetospheric instabilities is emphasized.

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