Volume rendering of the axial component of the Poynting flux in the Solar atmosphere in a given snapshot at time 24.34 min. The Poynting flux directed in the positive s-direction (that is, from left to right in this figure) is shown in red and the Poynting flux directed in the negative s-direction is shown in blue. The s-axis is defined as the coordinate along the loop axis. The range of the color scale is −1 × 10⁸ to +1 × 10⁸ erg s⁻¹ cm⁻². The figure shows the volume encompassing chromosphere and corona between the two photospheres, one at each footpoint. See Sect. 3.3.