3 ! Updated to CESM1.0.3 (CAM5.1.01) by Balwinder.Singh@pnnl.gov
5 !===============================================================================
6 ! SVN $Id: shr_const_mod.F90 6749 2007-10-04 20:58:20Z jwolfe $
7 ! SVN $URL: https://svn-ccsm-models.cgd.ucar.edu/csm_share/branch_tags/cesm1_0_rel_tags/cesm1_0_3_n01_share3_110527/shr/shr_const_mod.F90 $
8 !===============================================================================
14 integer(SHR_KIND_IN),parameter,private :: R8 = SHR_KIND_R8 ! rename for local readability only
16 !----------------------------------------------------------------------------
17 ! physical constants (all data public)
18 !----------------------------------------------------------------------------
21 real(R8),parameter :: SHR_CONST_PI = 3.14159265358979323846_R8 ! pi
22 real(R8),parameter :: SHR_CONST_CDAY = 86400.0_R8 ! sec in calendar day ~ sec
23 real(R8),parameter :: SHR_CONST_SDAY = 86164.0_R8 ! sec in siderial day ~ sec
24 real(R8),parameter :: SHR_CONST_OMEGA = 2.0_R8*SHR_CONST_PI/SHR_CONST_SDAY ! earth rot ~ rad/sec
25 real(R8),parameter :: SHR_CONST_REARTH = 6.37122e6_R8 ! radius of earth ~ m
26 real(R8),parameter :: SHR_CONST_G = 9.80616_R8 ! acceleration of gravity ~ m/s^2
28 real(R8),parameter :: SHR_CONST_STEBOL = 5.67e-8_R8 ! Stefan-Boltzmann constant ~ W/m^2/K^4
29 real(R8),parameter :: SHR_CONST_BOLTZ = 1.38065e-23_R8 ! Boltzmann's constant ~ J/K/molecule
30 real(R8),parameter :: SHR_CONST_AVOGAD = 6.02214e26_R8 ! Avogadro's number ~ molecules/kmole
31 real(R8),parameter :: SHR_CONST_RGAS = SHR_CONST_AVOGAD*SHR_CONST_BOLTZ ! Universal gas constant ~ J/K/kmole
32 real(R8),parameter :: SHR_CONST_MWDAIR = 28.966_R8 ! molecular weight dry air ~ kg/kmole
33 real(R8),parameter :: SHR_CONST_MWWV = 18.016_R8 ! molecular weight water vapor
34 real(R8),parameter :: SHR_CONST_RDAIR = SHR_CONST_RGAS/SHR_CONST_MWDAIR ! Dry air gas constant ~ J/K/kg
35 real(R8),parameter :: SHR_CONST_RWV = SHR_CONST_RGAS/SHR_CONST_MWWV ! Water vapor gas constant ~ J/K/kg
36 real(R8),parameter :: SHR_CONST_ZVIR = (SHR_CONST_RWV/SHR_CONST_RDAIR)-1.0_R8 ! RWV/RDAIR - 1.0
37 real(R8),parameter :: SHR_CONST_KARMAN = 0.4_R8 ! Von Karman constant
38 real(R8),parameter :: SHR_CONST_PSTD = 101325.0_R8 ! standard pressure ~ pascals
39 real(R8),parameter :: SHR_CONST_PDB = 0.0112372_R8 ! ratio of 13C/12C in Pee Dee Belemnite (C isotope standard)
41 real(R8),parameter :: SHR_CONST_TKTRIP = 273.16_R8 ! triple point of fresh water ~ K
42 real(R8),parameter :: SHR_CONST_TKFRZ = 273.15_R8 ! freezing T of fresh water ~ K
43 real(R8),parameter :: SHR_CONST_TKFRZSW = SHR_CONST_TKFRZ - 1.8_R8 ! freezing T of salt water ~ K
45 real(R8),parameter :: SHR_CONST_RHODAIR = & ! density of dry air at STP ~ kg/m^3
46 SHR_CONST_PSTD/(SHR_CONST_RDAIR*SHR_CONST_TKFRZ)
47 real(R8),parameter :: SHR_CONST_RHOFW = 1.000e3_R8 ! density of fresh water ~ kg/m^3
48 real(R8),parameter :: SHR_CONST_RHOSW = 1.026e3_R8 ! density of sea water ~ kg/m^3
49 real(R8),parameter :: SHR_CONST_RHOICE = 0.917e3_R8 ! density of ice ~ kg/m^3
50 real(R8),parameter :: SHR_CONST_CPDAIR = 1.00464e3_R8 ! specific heat of dry air ~ J/kg/K
51 real(R8),parameter :: SHR_CONST_CPWV = 1.810e3_R8 ! specific heat of water vap ~ J/kg/K
52 real(R8),parameter :: SHR_CONST_CPVIR = (SHR_CONST_CPWV/SHR_CONST_CPDAIR)-1.0_R8 ! CPWV/CPDAIR - 1.0
53 real(R8),parameter :: SHR_CONST_CPFW = 4.188e3_R8 ! specific heat of fresh h2o ~ J/kg/K
54 real(R8),parameter :: SHR_CONST_CPSW = 3.996e3_R8 ! specific heat of sea h2o ~ J/kg/K
55 real(R8),parameter :: SHR_CONST_CPICE = 2.11727e3_R8 ! specific heat of fresh ice ~ J/kg/K
56 real(R8),parameter :: SHR_CONST_LATICE = 3.337e5_R8 ! latent heat of fusion ~ J/kg
57 real(R8),parameter :: SHR_CONST_LATVAP = 2.501e6_R8 ! latent heat of evaporation ~ J/kg
58 real(R8),parameter :: SHR_CONST_LATSUB = & ! latent heat of sublimation ~ J/kg
59 SHR_CONST_LATICE + SHR_CONST_LATVAP
60 real(R8),parameter :: SHR_CONST_OCN_REF_SAL = 34.7_R8 ! ocn ref salinity (psu)
61 real(R8),parameter :: SHR_CONST_ICE_REF_SAL = 4.0_R8 ! ice ref salinity (psu)
63 real(R8),parameter :: SHR_CONST_SPVAL = 1.0e30_R8 ! special missing value
65 END MODULE shr_const_mod