CESM_Driver: shr_const_mod.F90 Source File

00001 !===============================================================================
00002 ! SVN $Id: shr_const_mod.F90 6749 2007-10-04 20:58:20Z jwolfe $
00003 ! SVN $URL: https://svn-ccsm-models.cgd.ucar.edu/csm_share/branch_tags/cesm1_0_rel_tags/cesm1_0_rel01_share3_100616/shr/shr_const_mod.F90 $
00004 !===============================================================================
00005 
00006 MODULE shr_const_mod
00007 
00008    use shr_kind_mod
00009 
00010    integer(SHR_KIND_IN),parameter,private :: R8 = SHR_KIND_R8 ! rename for local readability only
00011 
00012    !----------------------------------------------------------------------------
00013    ! physical constants (all data public)
00014    !----------------------------------------------------------------------------
00015    public
00016 
00017    real(R8),parameter :: SHR_CONST_PI      = 3.14159265358979323846_R8  ! pi
00018    real(R8),parameter :: SHR_CONST_CDAY    = 86400.0_R8      ! sec in calendar day ~ sec
00019    real(R8),parameter :: SHR_CONST_SDAY    = 86164.0_R8      ! sec in siderial day ~ sec
00020    real(R8),parameter :: SHR_CONST_OMEGA   = 2.0_R8*SHR_CONST_PI/SHR_CONST_SDAY ! earth rot ~ rad/sec
00021    real(R8),parameter :: SHR_CONST_REARTH  = 6.37122e6_R8    ! radius of earth ~ m
00022    real(R8),parameter :: SHR_CONST_G       = 9.80616_R8      ! acceleration of gravity ~ m/s^2
00023 
00024    real(R8),parameter :: SHR_CONST_STEBOL  = 5.67e-8_R8      ! Stefan-Boltzmann constant ~ W/m^2/K^4
00025    real(R8),parameter :: SHR_CONST_BOLTZ   = 1.38065e-23_R8  ! Boltzmann's constant ~ J/K/molecule
00026    real(R8),parameter :: SHR_CONST_AVOGAD  = 6.02214e26_R8   ! Avogadro's number ~ molecules/kmole
00027    real(R8),parameter :: SHR_CONST_RGAS    = SHR_CONST_AVOGAD*SHR_CONST_BOLTZ       ! Universal gas constant ~ J/K/kmole
00028    real(R8),parameter :: SHR_CONST_MWDAIR  = 28.966_R8       ! molecular weight dry air ~ kg/kmole
00029    real(R8),parameter :: SHR_CONST_MWWV    = 18.016_R8       ! molecular weight water vapor
00030    real(R8),parameter :: SHR_CONST_RDAIR   = SHR_CONST_RGAS/SHR_CONST_MWDAIR        ! Dry air gas constant     ~ J/K/kg
00031    real(R8),parameter :: SHR_CONST_RWV     = SHR_CONST_RGAS/SHR_CONST_MWWV          ! Water vapor gas constant ~ J/K/kg
00032    real(R8),parameter :: SHR_CONST_ZVIR    = (SHR_CONST_RWV/SHR_CONST_RDAIR)-1.0_R8 ! RWV/RDAIR - 1.0
00033    real(R8),parameter :: SHR_CONST_KARMAN  = 0.4_R8          ! Von Karman constant
00034    real(R8),parameter :: SHR_CONST_PSTD    = 101325.0_R8     ! standard pressure ~ pascals
00035    real(R8),parameter :: SHR_CONST_PDB     = 0.0112372_R8    ! ratio of 13C/12C in Pee Dee Belemnite (C isotope standard)
00036  
00037    real(R8),parameter :: SHR_CONST_TKTRIP  = 273.16_R8       ! triple point of fresh water        ~ K
00038    real(R8),parameter :: SHR_CONST_TKFRZ   = 273.15_R8       ! freezing T of fresh water          ~ K 
00039    real(R8),parameter :: SHR_CONST_TKFRZSW = SHR_CONST_TKFRZ - 1.8_R8 ! freezing T of salt water  ~ K
00040 
00041    real(R8),parameter :: SHR_CONST_RHODAIR =                ! density of dry air at STP  ~ kg/m^3
00042                          SHR_CONST_PSTD/(SHR_CONST_RDAIR*SHR_CONST_TKFRZ)
00043    real(R8),parameter :: SHR_CONST_RHOFW   = 1.000e3_R8      ! density of fresh water     ~ kg/m^3
00044    real(R8),parameter :: SHR_CONST_RHOSW   = 1.026e3_R8      ! density of sea water       ~ kg/m^3
00045    real(R8),parameter :: SHR_CONST_RHOICE  = 0.917e3_R8      ! density of ice             ~ kg/m^3
00046    real(R8),parameter :: SHR_CONST_CPDAIR  = 1.00464e3_R8    ! specific heat of dry air   ~ J/kg/K
00047    real(R8),parameter :: SHR_CONST_CPWV    = 1.810e3_R8      ! specific heat of water vap ~ J/kg/K
00048    real(R8),parameter :: SHR_CONST_CPVIR   = (SHR_CONST_CPWV/SHR_CONST_CPDAIR)-1.0_R8 ! CPWV/CPDAIR - 1.0
00049    real(R8),parameter :: SHR_CONST_CPFW    = 4.188e3_R8      ! specific heat of fresh h2o ~ J/kg/K
00050    real(R8),parameter :: SHR_CONST_CPSW    = 3.996e3_R8      ! specific heat of sea h2o   ~ J/kg/K
00051    real(R8),parameter :: SHR_CONST_CPICE   = 2.11727e3_R8    ! specific heat of fresh ice ~ J/kg/K
00052    real(R8),parameter :: SHR_CONST_LATICE  = 3.337e5_R8      ! latent heat of fusion      ~ J/kg
00053    real(R8),parameter :: SHR_CONST_LATVAP  = 2.501e6_R8      ! latent heat of evaporation ~ J/kg
00054    real(R8),parameter :: SHR_CONST_LATSUB  =                ! latent heat of sublimation ~ J/kg
00055                          SHR_CONST_LATICE + SHR_CONST_LATVAP
00056    real(R8),parameter :: SHR_CONST_OCN_REF_SAL = 34.7_R8     ! ocn ref salinity (psu)
00057    real(R8),parameter :: SHR_CONST_ICE_REF_SAL =  4.0_R8     ! ice ref salinity (psu)
00058 
00059    real(R8),parameter :: SHR_CONST_SPVAL   = 1.0e30_R8       ! special missing value
00060 
00061 END MODULE shr_const_mod