Logarithm of the ratio between the simulated [H₂O₂]/[H₂O] obtained after lowering the desorption energy of a specific suprathermal species by an order of magnitude and the simulated [H₂O₂]/[H₂O] in model A. Results at 16 K are shown in blue and those at 77 K are shown in orange. The vertical gray line indicates the positions where [H₂O₂]/[H₂O] is unchanged after modifying the desorption energy. The ratio obtained by changing the E_D of H* at 77 K is −3.86, far outside the range of the x-axis, and is therefore not plotted.