Statistical association of discontinuities and reconnection in magnetohydrodynamic turbulence

Details Statistical association of discontinuities and reconnection in magnetohydrodynamic turbulence Statistical association of discontinuities and reconnection in magnetohydrodynamic turbulence

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh43c1972s&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SH43C-1972

Physics

Plasma Physics

[2149] Interplanetary Physics / Mhd Waves And Turbulence, [7835] Space Plasma Physics / Magnetic Reconnection, [7839] Space Plasma Physics / Nonlinear Phenomena

Scientific paper

Using high Reynolds number simulations of two-dimensional magnetohydrodynamic (2D MHD) turbulence as a test case, a statistical association between tangential discontinuities and magnetic reconnection is demonstrated. Methods employed in previous studies on discontinuities and reconnection in turbulence are used to identify sets of possible reconnection events along a one-dimensional path through the turbulent field, emulating experimental sampling by single detector in a high speed flow. The goal is to develop numerical algorithms for identifying candidate reconnection events in space physics applications. We find that sets of strong discontinuities, identified using the normalized partial variance of vector increments, include an increasing fraction of reconnection events as the threshold for identification grows. Magnetic discontinuities become almost purely reconnection events for high thresholds, with values generally higher than six standard deviations.

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