CCSM Research Tools: CCSM2.0.1 shr_const_mod.F90
CCSM2.0.1 Shared Constants Module
The following constants are made available in the source code file shr_const_mod.F90. It is assumed that all CCSM2.0.1 components will make use of this Fortran module to coordinate the values of these constant among all components.
| Variable Name | Value | Explanation | Units |
| PI | 3.14159265358979323846 | pi | |
| CDAY | 86400.0 | sec in calendar day | sec |
| SDAY | 86164.0 | sec in siderial day | sec |
| OMEGA | 2.0*PI/SDAY | earth rot | rad/sec |
| REARTH | 6.37122e6 | radius of earth | m |
| G | 9.80616 | acceleration of gravity | m/s^2 |
| PSTD | 101325.0 | standard pressure | pascals |
| STEBOL | 5.67e-8 | Stefan-Boltzmann constant | W/m^2/K^4 |
| BOLTZ | 1.38065e-23 | Boltzmann's constant | J/K/molecule |
| AVOGAD | 6.02214e26 | Avogadro's number | molecules/kmole |
| RGAS | AVOGAD*BOLTZ | Universal gas constant | J/K/kmole |
| MWDAIR | 28.966 | molecular weight dry air | kg/kmole |
| MWWV | 18.016 | molecular weight water vapor | |
| RDAIR | RGAS/MWDAIR | Dry air gas constant | J/K/kg |
| RWV | RGAS/MWWV | Water vapor gas constant | J/K/kg |
| ZVIR | (RWV/RDAIR)-1.0 | ||
| KARMAN | 0.4 | Von Karman constant | |
| TKFRZ | 273.16 | freezing T of fresh water, intentionally equal to TKTRIP | K |
| TKTRIP | 273.16 | triple point of fresh water | K |
| RHODAIR | PSTD/(RDAIR*TKFRZ) | density of dry air at STP | kg/m^3 |
| RHOFW | 1.000e3 | density of fresh water | kg/m^3 |
| RHOSW | 1.026e3 | density of sea water | kg/m^3 |
| RHOICE | 0.917e3 | density of ice | kg/m^3 |
| CPDAIR | 1.00464e3 | specific heat of dry air | J/kg/K |
| CPFW | 4.188e3 | specific heat of fresh h2o | J/kg/K |
| CPSW | 3.996e3 | specific heat of sea h2o | J/kg/K |
| CPWV | 1.810e3 | specific heat of water vap | J/kg/K |
| CPICE | 2.11727e3 | specific heat of fresh ice | J/kg/K |
| LATICE | 3.337e5 | latent heat of fusion | J/kg |
| LATVAP | 2.501e6 | latent heat of evaporation | J/kg |
| LATSUB | LATICE + LATVAP | latent heat of sublimation | J/kg |
| OCN_REF_SAL | 34.7 | ocn ref salinity | psu |
| ICE_REF_SAL | 0.0 | ice ref salinity | psu |