Evolution of the 1D Harris current sheet. From top to bottom: the magnetic field B_x, the resistivity η, the Joule heating Q_J, and the temperature T are plotted as obtained by using the Syntelis-19 (green), YS-94 (blue), and Gudiksen-11 (red) resistivity models. The first and second columns show the results, measured at different times, setting the diffusion parameters to the same values as used in the 2D experiment. The third and fourth columns show the results obtained after adjusting these diffusion parameters to obtain the same behaviour on this 1D Harris sheet for the three resistivity models.