When the rubber hits the road: turbulence and intermittencies in Earth’s magnetosphere (Invited)

Details When the rubber hits the road: turbulence and intermittencies in Earth’s magnetosphere (Invited) When the rubber hits the road: turbulence and intermittencies in Earth’s magnetosphere (Invited)

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm41c..02l&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM41C-02

Physics

Plasma Physics

[4430] Nonlinear Geophysics / Complex Systems, [7863] Space Plasma Physics / Turbulence

Scientific paper

The theory of MHD turbulence has a long history of development, but its application to actual physical systems has not been as widespread as the omnipresence of turbulent phenomena in these systems. The reasons can be many. For example, the geometry, constitution, coupling, and boundary conditions in an actual system may place it well beyond the limit of the current theory. Or our measurement capability has not progressed to the point that the salient theoretical predictions can be reliably tested. In our view, however, the most pertinent reason is the specialist’s unfamiliarity with and reluctance to use the ‘generalist’ approach of complexity and turbulence, and the generalist’s lack of attention to the particulars of specific systems. Clearly, a closer dialogue between the two communities holds significant promise for further advances. In this talk, complexity and turbulence observed in Earth’s magnetosphere are reviewed. A distinguishing characteristic of magnetospheric processes is strong intermittency in global episodes and ever-present turbulence on local scales. We explore the suggestion that avalanches of localized turbulence are responsible for global dynamics. Some new theoretical advances in elaborating this concept are discussed.

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