of the magnetic field lines with the upward propagation of the twist along individual field lines. PAD09 further showed that the velocity of this propagating wave was Alfvénic (0.65$c_{A}$ - 0.90$c_{A}$), while the actual bulk plasma speed was much smaller (cf. their Fig. 6). Figures 10 and 11 of PAD09 showed the magnetic helicity flux, the Poynting flux and the fluxes of kinetic and magnetic energy at different heights, further confirming the upward propagation of energy and helicity at near-Alfvén speed due to the global Alfvénic nonlinear wave trains. In other numerical models of coronal jets generated in response to flux emergence, @Archontis13a also hypothesized that helical jets were driven by [[untwisting upflows]{}]{}. Based on the same model, @Lee15 found further evidence that the untwisting motion is associated with a propagating torsional wave. @FangF14 also observed [[untwisting upflows]{}]{} driving high-density plasma upward due to the Lorentz force associated with the magnetic tension in the non-linear Alfven waves dominating the divergence of the Poynting flux. They showed that thermal conduction was a second-order effect, only marginally enhancing the upflow of material by $2\%$.

At smaller scales, evidence of rotating motions has also been deduced for chromospheric/transition region jet events. @LiuW09 [@LiuW11] 