Current properties along a loop in an emerging active region of Chen et al. (2014, 2015). The format is the same as for the loop in the stable active region in Fig. 1. Panel a shows the total current I along the loop that now changes sign and panel b displays the angle γ between current and magnetic field. Just as in Fig. 1 we show I and γ for twelve selected field lines in the loop (cf. Fig. 2) over the normalized arc length. Zero arc length is at the left footpoint of the loop (see Fig. 4). The two vertical dotted lines indicate the coronal region (above 1 MK) and the dashed line indicates zero current. We refer to Sect. 3.1.
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