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Fig. 3

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Volumetric heating rates along individual field lines of the bright loop set, marked in red in Fig. 2. The lengths of the field lines are normalized to unity. The thick black line in the top panel shows the average of the Ohmic heating for the selected field lines. The Ohmic heating rates are averaged over five minutes to reduce the effect of transient events. The dashed lines indicate the average position of the coronal base at log T [K]  = 5.5 for the selected field lines. The Alfvénic and the turbulent heating are plotted normalized to the heat input just below the coronal base. All panels cover the heating rate over four orders of magnitude on the ordinate. See Sects. 3.2 and 4.1.

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