Comparison of the dominant quantities in the UTR jump condition obtained from the HYDRAD and LareJ solutions. Rows 1, 2, 3 and 4 correspond to Case 1 apex, Case 3 apex, Case 3 fp2 and Case 4 fp2 heating, respectively. From left to right the columns show the heat flux at the top of UTR (F_c,0), volumetric heating rate in the UTR (), IRL in the UTR (ℛ_utr) and enthalpy flux at the top of the UTR (F_e,0, lines connected by diamond symbols indicate where the enthalpy flux is downflowing and lines without diamonds indicate where the enthalpy flux is upflowing). The upper two rows (Cases 1 and 3 apex heating) in the second column () show only the background heating and have a different vertical axis. The dashed blue line is the LareJ solution (computed with 500 grid points along the length of the loop with the jump condition employed) and the dot-dashed orange line corresponds to the fully resolved HYDRAD solution.