Free Access
Table B.1
Greek symbols.
| Parameter | Unity | Description |
|
|
||
|
Surface fraction of the porous network covered by water molecules that form the clathrate structure | |
|
Surface fraction of the porous network covered by the pure ice species x | |
| β | Power law of the size distribution of dust grains | |
| Δri | m | Thickness of each layer i |
| Δt | s | Time step |
| δ | Obliquity | |
| ϵ | Infrared surface emissivity of the nucleus | |
| ϕ x | mol m-2 s-1 | Free sublimation rate of the specie x |
| Φx | mol m-2 s-1 | Molar flow of gas x |
| φ | Argument of the sub-solar meridian at perihelion | |
|
Molar fraction of the molecule x trapped during formation of MG clathrate (l = f) | |
| or released during dissociation of MG clathrate (l = d) | ||
| γ | The true anomaly of the comet | |
| λ | m | Mean free path of molecules in the porous network |
|
mol m-2 Pa-1 s-1 | Kinetic parameter of formation (k = f) or dissociation (k = d) of clathrate |
|
mol m-2 Pa-1 s-1 | Nominal kinetic parameter of formation (k = f) or dissociation (k = d) of clathrate |
| θ | Latitude on the comet surface | |
| θ s | Cometocentric latitude of the sub-solar point | |
|
kg m-3 | Mass density of amorphous water ice |
|
kg m-3 | Mass density of the solid or gas component l (l = d for dust, cl for clathrate, |
| i for pure ices of elements x, or g for gas) | ||
|
kg m-3 | Mass density of the volatile molecule x trapped in amorphous ice |
|
kg m-3 | Bulk density of the solid component l (l = d for dust, cl for clathrate or i for pure ices of elements x |
|
kg m-3 | Mass density of gas x |
| σ | J s-1 m-2 K-4 | Stefan-Boltzmann constant |
| τ cr | s | Time of crystallization of the amorphous water ice |
| τ | Tortuosity that is defined as the ratio of the length of a pore to the distance between its ends | |
| ω | s-1 | Spin rotation period of the comet nucleus |
| ξ | Solar zenith distance | |
| Ψ, Ψi | Porosity and initial porosity of the matrix | |
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.