Fig. 2.
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Time sequences of rms quantities for a selection of four runs, choosing a varying σ0 while keeping σ1 = 0.1 fixed. In the upper panels we show the total current density, J = |∇×B|, J∥ (along B0), and J⊥, whereas in the bottom ones we plot 
, basically the Alfvén speed, and v, again total, parallel, and perpendicular components, adopting the same notations.
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