3D climate modeling of close-in land planets: Circulation patterns, climate moist bistability, and habitability

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Table 1

Standard parameters used in the climate simulations.

Planet name		Gl 581 c	HD 85512 b
Stellar luminosity	L_⋆ [L_⊙]	0.0135	0.126
Stellar mass	M_⋆ [M_⊙]	0.31	0.69
Orbital semi-major axis	a [AU]	0.073	0.26
Orbital rotation rate	Ω_orb [s^-1]	5.59 × 10^-6	1.25 × 10^-6
Orbital eccentricity	e	0–0.05	0–0.11
Obliquity	ε _p	0	–
Tidal resonance	n	1, 3:2	–
atmospheric pressure	p_s [bar]	0.1–10	–
Mass^†	M_p [M_⊕]	6.25	4.15
Radius^‡	R_p [R_⊕]	1.85	1.60
Surface gravity	g [m s^-2]	18.4	15.8
Surface albedo	A_s	0.3	–
Ice albedo	A_ice	0.3–0.55	–
Surface roughness	z₀ [m]	1 × 10^-2	–
Specific heat capacity	c_p [J K^-1kg^-1]	1003.16	–
Condensation nuclei	N_c [kg^-1]	1 × 10⁵	–

Notes.

^(†)

This is the mass used in simulations. It is inferred from the M_psini measured by radial velocity by assuming i = 60°. This inclination seems favored by recent observations of a disk around Gl 581.

^(‡)

Inferred from the mass assuming Earth density.

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