GFS Operational Physics Documentation  Revision: 81451

This module contains some of the most frequently used math and physics constants for GCM models. More...

Detailed Description

This module contains some of the most frequently used math and physics constants for GCM models.

Collaboration diagram for physcons:

Math constants

real(kind=kind_phys), parameter physcons::con_pi =3.1415926535897931
 pi
 
real(kind=kind_phys), parameter physcons::con_sqrt2 =1.414214e+0
 square root of 2
 
real(kind=kind_phys), parameter physcons::con_sqrt3 =1.732051e+0
 square root of 3
 

Geophysics/Astronomy constants

real(kind=kind_phys), parameter physcons::con_rerth =6.3712e+6
 radius of earth (m)
 
real(kind=kind_phys), parameter physcons::con_g =9.80665e+0
 gravity ( \(m/s^{2}\))
 
real(kind=kind_phys), parameter physcons::con_omega =7.2921e-5
 ang vel of earth ( \(s^{-1}\))
 
real(kind=kind_phys), parameter physcons::con_p0 =1.01325e5
 std atms pressure (pa)
 
real(kind=kind_phys), parameter physcons::con_solr_old =1.3660e+3
 solar constant ( \(W/m^{2}\))-liu(2002)
 
real(kind=kind_phys), parameter physcons::con_solr =1.3608e+3
 solar constant ( \(W/m^{2}\))-nasa-sorce Tim(2008)
 

Thermodynamics constants

real(kind=kind_phys), parameter physcons::con_rgas =8.314472
 molar gas constant ( \(J/mol/K\))
 
real(kind=kind_phys), parameter physcons::con_rd =2.8705e+2
 gas constant air ( \(J/kg/K\))
 
real(kind=kind_phys), parameter physcons::con_rv =4.6150e+2
 gas constant H2O ( \(J/kg/K\))
 
real(kind=kind_phys), parameter physcons::con_cp =1.0046e+3
 spec heat air at p ( \(J/kg/K\))
 
real(kind=kind_phys), parameter physcons::con_cv =7.1760e+2
 spec heat air at v ( \(J/kg/K\))
 
real(kind=kind_phys), parameter physcons::con_cvap =1.8460e+3
 spec heat H2O gas ( \(J/kg/K\))
 
real(kind=kind_phys), parameter physcons::con_cliq =4.1855e+3
 spec heat H2O liq ( \(J/kg/K\))
 
real(kind=kind_phys), parameter physcons::con_csol =2.1060e+3
 spec heat H2O ice ( \(J/kg/K\))
 
real(kind=kind_phys), parameter physcons::con_hvap =2.5000e+6
 lat heat H2O cond ( \(J/kg\))
 
real(kind=kind_phys), parameter physcons::con_hfus =3.3358e+5
 lat heat H2O fusion ( \(J/kg\))
 
real(kind=kind_phys), parameter physcons::con_psat =6.1078e+2
 pres at H2O 3pt (Pa)
 
real(kind=kind_phys), parameter physcons::con_t0c =2.7315e+2
 temp at 0C (K)
 
real(kind=kind_phys), parameter physcons::con_ttp =2.7316e+2
 temp at H2O 3pt (K)
 
real(kind=kind_phys), parameter physcons::con_tice =2.7120e+2
 temp freezing sea (K)
 
real(kind=kind_phys), parameter physcons::con_jcal =4.1855E+0
 joules per calorie
 
real(kind=kind_phys), parameter physcons::con_rhw0 =1022.0
 sea water reference density ( \(kg/m^{3}\))
 
real(kind=kind_phys), parameter physcons::con_epsq =1.0E-12
 min q for computing precip type
 

Secondary constants

real(kind=kind_phys), parameter physcons::con_rocp =con_rd/con_cp
 
real(kind=kind_phys), parameter physcons::con_cpor =con_cp/con_rd
 
real(kind=kind_phys), parameter physcons::con_rog =con_rd/con_g
 
real(kind=kind_phys), parameter physcons::con_fvirt =con_rv/con_rd-1.
 
real(kind=kind_phys), parameter physcons::con_eps =con_rd/con_rv
 
real(kind=kind_phys), parameter physcons::con_epsm1 =con_rd/con_rv-1.
 
real(kind=kind_phys), parameter physcons::con_dldt =con_cvap-con_cliq
 
real(kind=kind_phys), parameter physcons::con_xpona =-con_dldt/con_rv
 
real(kind=kind_phys), parameter physcons::con_xponb =-con_dldt/con_rv+con_hvap
 

Other Physics/Chemistry constants (source: 2002 CODATA)

real(kind=kind_phys), parameter physcons::con_c =2.99792458e+8
 speed of light ( \(m/s\))
 
real(kind=kind_phys), parameter physcons::con_plnk =6.6260693e-34
 planck constant ( \(J/s\))
 
real(kind=kind_phys), parameter physcons::con_boltz =1.3806505e-23
 boltzmann constant ( \(J/K\))
 
real(kind=kind_phys), parameter physcons::con_sbc =5.670400e-8
 stefan-boltzmann ( \(W/m^{2}/K^{4}\))
 
real(kind=kind_phys), parameter physcons::con_avgd =6.0221415e23
 avogadro constant ( \(mol^{-1}\))
 
real(kind=kind_phys), parameter physcons::con_gasv =22413.996e-6
 vol of ideal gas at 273.15K, 101.325kPa ( \(m^{3}/mol\))
 
real(kind=kind_phys), parameter physcons::con_amd =28.9644
 molecular wght of dry air ( \(g/mol\))
 
real(kind=kind_phys), parameter physcons::con_amw =18.0154
 molecular wght of water vapor ( \(g/mol\))
 
real(kind=kind_phys), parameter physcons::con_amo3 =47.9982
 molecular wght of o3 ( \(g/mol\))
 
real(kind=kind_phys), parameter physcons::con_amco2 =44.011
 molecular wght of co2 ( \(g/mol\))
 
real(kind=kind_phys), parameter physcons::con_amo2 =31.9999
 molecular wght of o2 ( \(g/mol\))
 
real(kind=kind_phys), parameter physcons::con_amch4 =16.043
 molecular wght of ch4 ( \(g/mol\))
 
real(kind=kind_phys), parameter physcons::con_amn2o =44.013
 molecular wght of n2o ( \(g/mol\))
 
real(kind=kind_phys), parameter physcons::con_thgni =-38.15
 temperature the H.G.Nuc. ice starts
 

Miscellaneous physics related constants (Moorthi - Jul 2014)

integer, parameter physcons::max_lon =5000
 
integer, parameter physcons::max_lat =2000
 
integer, parameter physcons::min_lon =192
 
integer, parameter physcons::min_la
 
real(kind=kind_phys), parameter physcons::rlapse = 0.65e-2
 
real(kind=kind_phys), parameter physcons::rhc_max = 0.99999
 
real(kind=kind_phys), parameter physcons::cb2mb = 10.0
 
real(kind=kind_phys), parameter physcons::pa2mb = 0.01
 
real(kind=kind_phys) physcons::dxmax
 
real(kind=kind_phys) physcons::dxmin
 
real(kind=kind_phys) physcons::dxinv