Space–time heatmaps of total density ρ (left), velocity v (centre), and temperature T (right) are shown for the non-linear MPI-AMRVAC evolution of the isobaric perturbation (σ = 1 Mm, s₀ = 30 Mm). The condensation forms at s = 30 Mm and slides rightward after t ≃ 1200 s. Diagonal features in the velocity panel are sub-sonic evacuation waves propagating outward from the condensation site. Flanking regions of elevated temperature reflect heating of the mass-depleted footpoints under the fixed balanced-heating prescription.