Atmospheric, dayside and nightside surface temperatures as functions of control parameters L_sen and L_adv for optically thin (τ_s;L = 0.1, top panels) and thick (τ_s;L = 1.0, bottom panels) atmospheres in longwave. Left: L_adv = 0.01 (weak circulation). Middle: L_adv = 1.0 (medium-strength circulation). Right: L_adv = 100 (strong circulation). In all cases, the atmosphere is quasi-transparent in the shortwave (τ_s;S =10⁻⁴), pure absorption is assumed (β_L0 = β_S0 = 1), A_s = 0.2, and F_⋆ = 1366 W m⁻², similarly as in Fig. 6. The dayside atmospheric (solid pink line) and surface (dashed red line) temperatures, as well as the nightside atmospheric (dotted cyan line) and surface (dashed blue line) temperatures are plotted as a function of the logarithm of L_sen. The notation log₁₀ designates the decimal logarithm.