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

Variables
Math constants
real(kind=kind_phys), parameter	con_pi =3.1415926535897931
	pi More...

real(kind=kind_phys), parameter	con_sqrt2 =1.414214e+0
	square root of 2 More...

real(kind=kind_phys), parameter	con_sqrt3 =1.732051e+0
	quare root of 3 More...

Geophysics/Astronomy constants
real(kind=kind_phys), parameter	con_rerth =6.3712e+6
	radius of earth ( $m$ ) More...

real(kind=kind_phys), parameter	con_g =9.80665e+0
	gravity ( $m/s^{2}$ ) More...

real(kind=kind_phys), parameter	con_omega =7.2921e-5
	ang vel of earth ( $s^{-1}$ ) More...

real(kind=kind_phys), parameter	con_p0 =1.01325e5
	standard atmospheric pressure ( $Pa$ ) More...

real(kind=kind_phys), parameter	con_solr_old =1.3660e+3
	solar constant ( $W/m^{2}$ )-Liu(2002) More...

real(kind=kind_phys), parameter	con_solr =1.3608e+3
	solar constant ( $W/m^{2}$ )-nasa-sorce Tim(2008) More...

Thermodynamics constants
real(kind=kind_phys), parameter	con_rgas =8.314472
	molar gas constant ( $J/mol/K$ ) More...

real(kind=kind_phys), parameter	con_rd =2.8705e+2
	gas constant air ( $J/kg/K$ ) More...

real(kind=kind_phys), parameter	con_rv =4.6150e+2
	gas constant H2O ( $J/kg/K$ ) More...

real(kind=kind_phys), parameter	con_cp =1.0046e+3
	spec heat air at p ( $J/kg/K$ ) More...

real(kind=kind_phys), parameter	con_cv =7.1760e+2
	spec heat air at v ( $J/kg/K$ ) More...

real(kind=kind_phys), parameter	con_cvap =1.8460e+3
	spec heat H2O gas ( $J/kg/K$ ) More...

real(kind=kind_phys), parameter	con_cliq =4.1855e+3
	spec heat H2O liq ( $J/kg/K$ ) More...

real(kind=kind_phys), parameter	con_csol =2.1060e+3
	spec heat H2O ice ( $J/kg/K$ ) More...

real(kind=kind_phys), parameter	con_hvap =2.5000e+6
	lat heat H2O cond ( $J/kg$ ) More...

real(kind=kind_phys), parameter	con_hfus =3.3358e+5
	lat heat H2O fusion ( $J/kg$ ) More...

real(kind=kind_phys), parameter	con_psat =6.1078e+2
	pres at H2O 3pt ( $Pa$ ) More...

real(kind=kind_phys), parameter	con_t0c =2.7315e+2
	temp at 0C (K) More...

real(kind=kind_phys), parameter	con_ttp =2.7316e+2
	temp at H2O 3pt (K) More...

real(kind=kind_phys), parameter	con_tice =2.7120e+2
	temp freezing sea (K) More...

real(kind=kind_phys), parameter	con_jcal =4.1855E+0
	joules per calorie More...

real(kind=kind_phys), parameter	con_rhw0 =1022.0
	sea water reference density ( $kg/m^{3}$ ) More...

real(kind=kind_phys), parameter	con_epsq =1.0E-12
	min q for computing precip type More...

Secondary constants
real(kind=kind_phys), parameter	con_rocp =con_rd/con_cp

real(kind=kind_phys), parameter	con_cpor =con_cp/con_rd

real(kind=kind_phys), parameter	con_rog =con_rd/con_g

real(kind=kind_phys), parameter	con_fvirt =con_rv/con_rd-1.

real(kind=kind_phys), parameter	con_eps =con_rd/con_rv

real(kind=kind_phys), parameter	con_epsm1 =con_rd/con_rv-1.

real(kind=kind_phys), parameter	con_dldt =con_cvap-con_cliq

real(kind=kind_phys), parameter	con_xpona =-con_dldt/con_rv

real(kind=kind_phys), parameter	con_xponb =-con_dldt/con_rv+con_hvap/(con_rv*con_ttp)

Other Physics/Chemistry constants (source: 2002 CODATA)
real(kind=kind_phys), parameter	con_c =2.99792458e+8
	speed of light ( $m/s$ ) More...

real(kind=kind_phys), parameter	con_plnk =6.6260693e-34
	planck constant ( $J/s$ ) More...

real(kind=kind_phys), parameter	con_boltz =1.3806505e-23
	boltzmann constant ( $J/K$ ) More...

real(kind=kind_phys), parameter	con_sbc =5.670400e-8
	stefan-boltzmann ( $W/m^{2}/K^{4}$ ) More...

real(kind=kind_phys), parameter	con_avgd =6.0221415e23
	avogadro constant ( $mol^{-1}$ ) More...

real(kind=kind_phys), parameter	con_gasv =22413.996e-6
	vol of ideal gas at 273.15K, 101.325kPa ( $m^{3}/mol$ ) More...

real(kind=kind_phys), parameter	con_amd =28.9644
	molecular wght of dry air ( $g/mol$ ) More...

real(kind=kind_phys), parameter	con_amw =18.0154
	molecular wght of water vapor ( $g/mol$ ) More...

real(kind=kind_phys), parameter	con_amo3 =47.9982
	molecular wght of o3 ( $g/mol$ ) More...

real(kind=kind_phys), parameter	con_amco2 =44.011
	molecular wght of co2 ( $g/mol$ ) More...

real(kind=kind_phys), parameter	con_amo2 =31.9999
	molecular wght of o2 ( $g/mol$ ) More...

real(kind=kind_phys), parameter	con_amch4 =16.043
	molecular wght of ch4 ( $g/mol$ ) More...

real(kind=kind_phys), parameter	con_amn2o =44.013
	molecular wght of n2o ( $g/mol$ ) More...

real(kind=kind_phys), parameter	con_thgni =-38.15
	temperature the H.G.Nuc. ice starts More...

Miscellaneous physics related constants (For WSM6; Moorthi - Jul 2014)
real(kind=kind_phys), parameter	rlapse = 0.65e-2
	density of water (kg/m^3) More...

real(kind=kind_phys), parameter	cb2mb = 10.0
	density of water (kg/m^3) More...

real(kind=kind_phys), parameter	pa2mb = 0.01
	density of water (kg/m^3) More...

real(kind=kind_phys), parameter	rhowater = 1000.
	density of water (kg/m^3) More...

real(kind=kind_phys), parameter	rhosnow = 100.
	density of snow (kg/m^3) More...

real(kind=kind_phys), parameter	rhoair = 1.28
	density of air near surface (kg/m^3) More...

Variables