The role of planetary interior in the long-term evolution of atmospheric CO2 on Earth-like exoplanets

Free Access

Table D.1

Input parameters used for the mantle model of Sect. 2.1 and Appendix A.

Parameter	Name	Value	Unit
A_c⊕	Earth’s core surface area⁽¹⁾	1.5 × 10¹⁴	m²
A_m⊕	Earth’s mantle surface area⁽¹⁾	5.1 × 10¹⁴	m²
α	Mantle mean thermal expansivity⁽¹⁾	2 × 10⁻⁵	K⁻¹
β	Nu-Ra relation exponent	1∕3	–
c_c	Core mean specific heat⁽²⁾	800	J kg⁻¹ K⁻¹
c_m	Mantle mean specific heat⁽²⁾	1100	J kg⁻¹ K⁻¹
D_⊕	Earth’s mantle thickness⁽³⁾	2.92 × 10⁶	m
E^⋆	Activation energy for subsolidus creep deformation⁽¹⁾	3 × 10⁵	J mol⁻¹
g	Gravitational acceleration⁽¹⁾	9.81	m s⁻²
k	Mantle mean thermal conductivity⁽¹⁾	4	W m⁻¹ K⁻¹
η_⊕	Present-day Earth viscosity⁽¹⁾	10²¹	Pa s
Q₀	Present-day radiogenic heat production⁽⁴⁾	3.31 × 10⁻⁸	W m⁻³
	Present-day heat production contribution from ²³⁸U⁽⁴⁾	24.285	%
	Present-day heat production contribution from ²³⁵U⁽⁴⁾	0.1467	%
	Present-day heat production contribution from ²³²Th⁽⁴⁾	74.752	%
	Present-day heat production contribution from ⁴⁰K⁽⁴⁾	0.8063	%
R_g	Gas constant⁽¹⁾	8.314	J mol⁻¹ K⁻¹
Ra_cr	Critical Rayleigh number⁽¹⁾	450	–
Ra_⊕	Present-day Earth Rayleigh number⁽²⁾	4.26 × 10⁷	–
ρ_c	Core mean density⁽²⁾	11449	kg m⁻³
ρ_m	Mantle mean density⁽²⁾	4424	kg m⁻³
t_⊕	Age of Earth⁽¹⁾	4.5	Gyr
	²³⁸U half-life⁽⁵⁾	4.468	Gyr
	²³⁵U half-life⁽⁵⁾	0.7038	Gyr
	²³² Th half-life⁽⁵⁾	14.05	Gyr
	⁴⁰ K half-life⁽⁵⁾	1.277	Gyr
T_{m ⊕}	Present-day Earth upper mantle temperature⁽¹⁾	1650	K
V_{c ⊕}	Earth’s core volume⁽¹⁾	1.7 × 10²⁰	m³
V_{m ⊕}	Earth’s mantle volume⁽¹⁾	9.1 × 10²⁰	m³

References.Parameter values are taken from ⁽¹⁾Höning et al. (2019b), ⁽²⁾calculated in this work. ⁽³⁾Driscoll & Bercovici (2014), ⁽⁴⁾Korenaga (2008), or ⁽⁵⁾ Turcotte & Schubert (2014)

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.