Impact of warm-up time (fast, mid, and slow cases are plotted in red, blue, and green, respectively) and final H density (dashed line (10⁷ cm⁻³) versus dotted line (10⁶ cm⁻³)) on simulated abundances of selected species. Red, blue, and green dashed lines are for models N7-Tg200-Td20-fast-wup, N7-Tg200-Td20, and N7-Tg200-Td20-slow-wup, respectively, and red, blue, and green dotted lines are for models N6-Tg200-Td20-fast-wup, N6-Tg200-Td20, and N6-Tg200-Td20-slow-wup, respectively. All plots are for both warm-up and post-warm-up stages, with both stages separated by red, blue, and green vertical dotted lines for fast, mid, and slow cases, respectively. Pink horizontal bar represents the observed value in G10 (see Table 3 for details of each model).