Panel a: vertical (z) coordinates of the bottom of the CZ (z_CZ, solid lines) and OZ (z_OZ, dashed). The dotted red line indicates the bottom of the domain. Panel b: overshooting depth d_os normalised by the pressure scale height H_p as a function of ℱ_n for Sets K (black), Kh (grey), P (blue), S (red), Sh (green), DS (purple), DSS1 (cyan), and DSS2 (orange). The purple diamond denotes Run DS5h. The dotted lines show approximate power laws from fits to simulation data; see Table 5. Panel c: comparison of Sets DS, DSS1, and DSS2 with the studies of Singh et al. (1998) (red) and Tian et al. (2009) (blue).