360-day evolution of the mixing ratios of photodissociation-driven species with concentrations above 10⁻⁴ in the uppermost atmospheric layer for four atmospheres with water fractions arranged by rows: 100, 10, 1, and 0.1%. The left and right columns correspond to the YMDF and FF models, respectively. Each panel presents the temporal evolution of species mixing ratios over the span of one year, with the y-axis showing mixing ratio and the x-axis representing time. The CF model at 0.1% H₂O shows the temporal evolution until the model reaches a steady state at day 201 of the simulation.