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Add a table of physical constants to the user guide #326

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Add a table of physical constants to the user guide #326

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Add a table of physical constants to the user guide
rkutteh Jun 27, 2024
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Update documentation/docs/user_guide/constants/index.md
rkutteh Jul 2, 2024
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Merge branch 'main' into 325-add-a-table-of-physical-constants-to-the…
ccarouge Aug 8, 2024
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16 changes: 16 additions & 0 deletions documentation/docs/user_guide/constants/index.md
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# CABLE constants

Table 1 lists the various types of constants used in CABLE. A list of the numerical values of each type can be accessed through the left navigation bar.


## Table 1: Various constants used in CABLE

| CABLE constants |
|------------------------|
| Physical constants |
| Mathematical constants |
| |
| |
| |
| |
| |
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5 changes: 5 additions & 0 deletions documentation/docs/user_guide/constants/mathematical_constants.md
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## Table 1: CABLE mathematical constants

| Name | Value |
|-----------------------|------------------|
| pi | 3.1415927 |
23 changes: 23 additions & 0 deletions documentation/docs/user_guide/constants/physical_constants.md
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## Table 1: CABLE physical constants

| Name | Value | Units | Description |
|-----------------------|------------------|-----------------------------------------------------|-------------------------------------------------- |
| tfrz | 273.16 | \( K \) | Temperature corresponding to \( 0^{\circ}C \) |
| sboltz | 5.67E-8 | \( W \cdot m^{-2} \cdot K^{-4} \) | Stefan-Boltzmann constant |
| emsoil | 1.0 | \( - \) | Soil emissivity |
| emleaf | 1.0 | \( - \) | Leaf emissivity |
| capp | 1004.64 | \( J \cdot kg^{-1} \cdot K^{-1} \) | Air specific heat |
| hl | 2.5014E6 | \( J \cdot kg^{-1} \) | Latent heat of vaporization |
| hlf | 0.334E6 | \( J \cdot kg^{-1} \) | Latent heat of fusion |
| hls | 2.8350E6 | \( J \cdot kg^{-1} \) | Latent heat of Sublimation |
| dheat | 21.5E-6 | \( cm^{2} \cdot s^{-1} \) | Molecular diffusivity for heat |
| grav | 9.8086 | \( m \cdot s^{-2} \) | Gravity acceleration |
| rgas | 8.3143 | \(J \cdot mol^{-1} \cdot K^{-1} \) | Universal gas const |
| rmair | 0.02897 | \( kg \cdot mol^{-1} \) | Molecular weight of dry air |
| rmh2o | 0.018016 | \( kg \cdot mol^{-1} \) | Molecular weight of water |
| cgsnow | 2090.0 | \( J \cdot kg^{-1} \cdot K^{-1} \) | Specific heat for snow |
| csice | 2.100E3 | \( J \cdot kg^{-1} \cdot K^{-1} \) | Specific heat for ice |
| cswat | 4.218E3 | \( J \cdot kg^{-1} \cdot K^{-1} \) | Specific heat for water at \( 0^{\circ}C \) |
| density_liq | 1000.0 | \( kg \cdot m^{-3} \) | Density of liquid water |
| density_ice | 921.0 | \( kg \cdot m^{-3} \) | Density of ice |

4 changes: 4 additions & 0 deletions documentation/mkdocs.yml
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Expand Up @@ -86,6 +86,10 @@ nav:
- Restart: user_guide/inputs/restart.md
- Output files:
- user_guide/outputs/index.md
- CABLE constants:
- user_guide/constants/index.md
- Physical constants: user_guide/constants/physical_constants.md
- Mathematical constants: user_guide/constants/mathematical_constants.md
- Other resources:
- Existing configurations: user_guide/other_resources/configurations/config.md
- Obsolete and deprecated features: user_guide/other_resources/obsolete_and_deprecated_features/obsolete_and_deprecated_features.md
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16 changes: 8 additions & 8 deletions src/params/cable_phys_constants_mod.F90
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Expand Up @@ -25,23 +25,23 @@ MODULE cable_phys_constants_mod
REAL, PARAMETER :: sboltz = 5.67e-8 ! Stefan-Boltz. const (W/m2/K4)
REAL, PARAMETER :: emsoil = 1.0 ! soil emissivity
REAL, PARAMETER :: emleaf = 1.0 ! leaf emissivity
REAL, PARAMETER :: capp = 1004.64 ! air spec. heat (J/kg/K)
REAL, PARAMETER :: hl = 2.5014e6 ! latent heat of vaporization (J/s/m2)
REAL, PARAMETER :: capp = 1004.64 ! air spec. heat (J/kg/K)
REAL, PARAMETER :: hl = 2.5014e6 ! latent heat of vaporization (J/kg)
!Below are constants used in CABLE model which are not as yet used in JAC-6.2
REAL, PARAMETER :: hlf = 0.334e6 ! latent heat of fusion
REAL, PARAMETER :: hls = 2.8350e6 ! latent heatOFsublimation (J/kg)
REAL, PARAMETER :: dheat = 21.5e-6 ! molecular diffusivity for heat
REAL, PARAMETER :: hlf = 0.334e6 ! latent heat of fusion (J/kg)
REAL, PARAMETER :: hls = 2.8350e6 ! latent heat of sublimation (J/kg)
REAL, PARAMETER :: dheat = 21.5e-6 ! molecular diffusivity for heat (cm2/s)
REAL, PARAMETER :: grav = 9.8086 ! gravity acceleration (m/s2)
REAL, PARAMETER :: rgas = 8.3143 ! universal gas const (J/mol/K)
REAL, PARAMETER :: rgas = 8.3143 ! universal gas const (J/mol/K)
REAL, PARAMETER :: rmair = 0.02897 ! molecular wt: dry air (kg/mol)
REAL, PARAMETER :: rmh2o = 0.018016 ! molecular wt: water (kg/mol)
REAL, PARAMETER :: cgsnow = 2090.0 ! specific heat for snow (J/kg/K)
REAL, PARAMETER :: cs_rho_ice = 1.9341e6 !heat capacity * density ice
REAL, PARAMETER :: cs_rho_ice = 1.9341e6 ! heat capacity * density ice
REAL, PARAMETER :: cs_rho_wat = 4.218e6 ! heat capacity * density water
REAL, PARAMETER :: csice = 2.100e3 ! specific heat for ice (J/kg/K)
REAL, PARAMETER :: cswat = 4.218e3 ! specific heat for water at 0°C (J/kg/K)
REAL, PARAMETER :: density_liq = 1000.0 ! density of liquid water
REAL, PARAMETER :: density_ice = 921.0 ! denisty of ice
REAL, PARAMETER :: density_ice = 921.0 ! density of ice

! Teten coefficients
REAL, PARAMETER :: tetena = 6.106 ! Magnus Tetans (Murray 1967)
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