Table 2
Values of parameters used in the two reference cases of the present work.
| Symbol | Description | Units | Earth-like case | Pure CO2 case |
|---|---|---|---|---|
| Planet characteristics | ||||
| Rp | Planet radius(a) | R⊕ | 1.0 | 1.0 |
| g | Surface gravity(a) | m s−2 | 9.8 | 9.8 |
| Atmospheric properties | ||||
| Rd | Gas constant for dry air(a) | J kg−1 K−1 | 287 | 188.9 |
| Cp | Heat capacity per unit mass(a) | J kg−1 K−1 | 1005 | 909.3 |
| ks | SW absorption coefficient(b) | m2 kg−1 | 10−6 | 10−6 |
| kl | LW absorption coefficient(b) | m2 kg−1 | 10−4 | 2.5 × 10−4 |
| βS0 | SW scattering parameter | – | 1.0 | 1.0 |
| βL0 | LW scattering parameter | – | 1.0 | 1.0 |
| Surface properties | ||||
| εs | Surface emissivity | – | 1.0 | 1.0 |
| As | Surface albedo(c) | – | 0.2 | 0.2 |
| Igr | Thermal inertia(c) | J m−2 s−1/2 K−1 | 2000 | 2000 |
| zr | Roughness height(d) | m | 3.21 × 10−5 | 3.21 × 10−5 |
Notes. The acronyms SW and LW stand for ‘shortwave’ and ‘longwave’, respectively. (a) Values for the Earth’s atmosphere given by Deitrick et al. (2020), Table 2, in the Earth-like case. In the pure CO2 case, Rd is calculated from Meija et al. (2016) and Cp is evaluated for Τ = 350 Κ from Yaws (1996), Appendix E. (b) Defined so that the optical depths in the longwave and in the shortwave at p = 1 bar are τL = 1 and τS = 10−2τL, respectively, in the Earth-like case. In the pure CO2 case, the optical depth in the longwave is set to an effective value for which the collapse pressure computed using the 2D instance of the meta-model in Sect. 5 corresponds to that obtained by Wordsworth (2015) from numerical simulations performed with a 3D GCM with correlated-k radiative transfer (Lacis & Oinas 1991). (c) Typical values for Venus-like soils (e.g. Lebonnois et al. 2010). (d) Defined so that CN = 10−3 for a 10 m-thick surface layer, following Frierson et al. (2006).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.