Comparisons among Cases 1, 2, 3, and 4 with different maximum AMR levels, of namely 1, 3, 5, and 7, respectively. The distributions of temperature (panels a-d), density (panels e–h), and the joint PDF of temperature and density (panel i–l) at around 376 s are presented. The vertical and horizontal purple dashed lines in panels i–l indicate the positions with the density of 10^−4.5 kg m⁻³ and the temperature of 2 × 10⁴ K.