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MODULE phycst
!!======================================================================
!! *** MODULE phycst ***
!! Definition of of both ocean and ice parameters used in the code
!!=====================================================================
!! History : OPA ! 1990-10 (C. Levy - G. Madec) Original code
!! 8.1 ! 1991-11 (G. Madec, M. Imbard) cosmetic changes
!! NEMO 1.0 ! 2002-08 (G. Madec, C. Ethe) F90, add ice constants
!! - ! 2006-08 (G. Madec) style
!! 3.2 ! 2006-08 (S. Masson, G. Madec) suppress useless variables + style
!! 3.4 ! 2011-11 (C. Harris) minor changes for CICE constants
!!----------------------------------------------------------------------
!!----------------------------------------------------------------------
!! phy_cst : define and print physical constant and domain parameters
!!----------------------------------------------------------------------
USE par_oce ! ocean parameters
USE in_out_manager ! I/O manager
IMPLICIT NONE
PRIVATE
PUBLIC phy_cst ! routine called by inipar.F90
REAL(wp), PUBLIC :: rpi = 3.141592653589793_wp !: pi
REAL(wp), PUBLIC :: rad = 3.141592653589793_wp / 180._wp !: conversion from degre into radian
REAL(wp), PUBLIC :: rsmall = 0.5 * EPSILON( 1.e0 ) !: smallest real computer value
REAL(wp), PUBLIC :: rday = 24.*60.*60. !: day [s]
REAL(wp), PUBLIC :: rsiyea !: sideral year [s]
REAL(wp), PUBLIC :: rsiday !: sideral day [s]
REAL(wp), PUBLIC :: raamo = 12._wp !: number of months in one year
REAL(wp), PUBLIC :: rjjhh = 24._wp !: number of hours in one day
REAL(wp), PUBLIC :: rhhmm = 60._wp !: number of minutes in one hour
REAL(wp), PUBLIC :: rmmss = 60._wp !: number of seconds in one minute
REAL(wp), PUBLIC :: omega !: earth rotation parameter [s-1]
REAL(wp), PUBLIC :: ra = 6371229._wp !: earth radius [m]
REAL(wp), PUBLIC :: grav = 9.80665_wp !: gravity [m/s2]
REAL(wp), PUBLIC :: rt0 = 273.15_wp !: freezing point of fresh water [Kelvin]
REAL(wp), PUBLIC :: rho0 !: volumic mass of reference [kg/m3]
REAL(wp), PUBLIC :: r1_rho0 !: = 1. / rho0 [m3/kg]
REAL(wp), PUBLIC :: rcp !: ocean specific heat [J/Kelvin]
REAL(wp), PUBLIC :: r1_rcp !: = 1. / rcp [Kelvin/J]
REAL(wp), PUBLIC :: rho0_rcp !: = rho0 * rcp
REAL(wp), PUBLIC :: r1_rho0_rcp !: = 1. / ( rho0 * rcp )
REAL(wp), PUBLIC :: emic = 0.97_wp !: emissivity of snow or ice (not used?)
REAL(wp), PUBLIC :: sice = 6.0_wp !: salinity of ice (for pisces) [psu]
REAL(wp), PUBLIC :: soce = 34.7_wp !: salinity of sea (for pisces and isf) [psu]
REAL(wp), PUBLIC :: rLevap = 2.5e+6_wp !: latent heat of evaporation (water)
REAL(wp), PUBLIC :: vkarmn = 0.4_wp !: von Karman constant
REAL(wp), PUBLIC :: vkarmn2 = 0.4_wp*0.4_wp !: square of von Karman constant
REAL(wp), PUBLIC :: stefan = 5.67e-8_wp !: Stefan-Boltzmann constant
REAL(wp), PUBLIC :: rhos = 330._wp !: volumic mass of snow [kg/m3]
REAL(wp), PUBLIC :: rhoi = 917._wp !: volumic mass of sea ice [kg/m3]
REAL(wp), PUBLIC :: rhow = 1000._wp !: volumic mass of freshwater in melt ponds [kg/m3]
REAL(wp), PUBLIC :: rcnd_i = 2.034396_wp !: thermal conductivity of fresh ice [W/m/K]
REAL(wp), PUBLIC :: rcpi = 2067.0_wp !: specific heat of fresh ice [J/kg/K]
REAL(wp), PUBLIC :: rLsub = 2.834e+6_wp !: pure ice latent heat of sublimation [J/kg]
REAL(wp), PUBLIC :: rLfus = 0.334e+6_wp !: latent heat of fusion of fresh ice [J/kg]
REAL(wp), PUBLIC :: rTmlt = 0.054_wp !: decrease of seawater meltpoint with salinity
REAL(wp), PUBLIC :: r1_rhoi !: 1 / rhoi
REAL(wp), PUBLIC :: r1_rhos !: 1 / rhos
REAL(wp), PUBLIC :: r1_rcpi !: 1 / rcpi
!!----------------------------------------------------------------------
!! NEMO/OCE 4.0 , NEMO Consortium (2018)
!! $Id: phycst.F90 14072 2020-12-04 07:48:38Z laurent $
!! Software governed by the CeCILL license (see ./LICENSE)
!!----------------------------------------------------------------------
CONTAINS
SUBROUTINE phy_cst
!!----------------------------------------------------------------------
!! *** ROUTINE phy_cst ***
!!
!! ** Purpose : set and print the constants
!!----------------------------------------------------------------------
rsiyea = 365.25_wp * rday * 2._wp * rpi / 6.283076_wp
rsiday = rday / ( 1._wp + rday / rsiyea )
#if defined key_cice
omega = 7.292116e-05
#else
omega = 2._wp * rpi / rsiday
#endif
r1_rhoi = 1._wp / rhoi
r1_rhos = 1._wp / rhos
r1_rcpi = 1._wp / rcpi
IF(lwp) THEN
WRITE(numout,*)
WRITE(numout,*) 'phy_cst : initialization of ocean parameters and constants'
WRITE(numout,*) '~~~~~~~'
WRITE(numout,*) ' mathematical constant rpi = ', rpi
WRITE(numout,*) ' day rday = ', rday, ' s'
WRITE(numout,*) ' sideral year rsiyea = ', rsiyea, ' s'
WRITE(numout,*) ' sideral day rsiday = ', rsiday, ' s'
WRITE(numout,*) ' omega omega = ', omega, ' s^-1'
WRITE(numout,*)
WRITE(numout,*) ' nb of months per year raamo = ', raamo, ' months'
WRITE(numout,*) ' nb of hours per day rjjhh = ', rjjhh, ' hours'
WRITE(numout,*) ' nb of minutes per hour rhhmm = ', rhhmm, ' mn'
WRITE(numout,*) ' nb of seconds per minute rmmss = ', rmmss, ' s'
WRITE(numout,*)
WRITE(numout,*) ' earth radius ra = ', ra , ' m'
WRITE(numout,*) ' gravity grav = ', grav , ' m/s^2'
WRITE(numout,*)
WRITE(numout,*) ' freezing point of water rt0 = ', rt0 , ' K'
WRITE(numout,*)
WRITE(numout,*) ' reference density and heat capacity now defined in eosbn2.f90'
WRITE(numout,*)
WRITE(numout,*) ' thermal conductivity of pure ice = ', rcnd_i , ' J/s/m/K'
WRITE(numout,*) ' thermal conductivity of snow is defined in a namelist '
WRITE(numout,*) ' fresh ice specific heat = ', rcpi , ' J/kg/K'
WRITE(numout,*) ' latent heat of fusion of fresh ice / snow = ', rLfus , ' J/kg'
WRITE(numout,*) ' latent heat of subl. of fresh ice / snow = ', rLsub , ' J/kg'
WRITE(numout,*) ' density of sea ice = ', rhoi , ' kg/m^3'
WRITE(numout,*) ' density of snow = ', rhos , ' kg/m^3'
WRITE(numout,*) ' density of freshwater (in melt ponds) = ', rhow , ' kg/m^3'
WRITE(numout,*) ' salinity of ice (for pisces) = ', sice , ' psu'
WRITE(numout,*) ' salinity of sea (for pisces and isf) = ', soce , ' psu'
WRITE(numout,*) ' latent heat of evaporation (water) = ', rLevap , ' J/m^3'
WRITE(numout,*) ' von Karman constant = ', vkarmn
WRITE(numout,*) ' Stefan-Boltzmann constant = ', stefan , ' J/s/m^2/K^4'
WRITE(numout,*)
WRITE(numout,*) ' conversion: degre ==> radian rad = ', rad
WRITE(numout,*)
WRITE(numout,*) ' smallest real computer value rsmall = ', rsmall
ENDIF
END SUBROUTINE phy_cst
!!======================================================================
END MODULE phycst