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), PARAMETER, PUBLIC :: grav = 9.80665_wp !: gravity [m/s2] !LB REAL(wp), PUBLIC :: rt0 = 273.15_wp !: freezing point of fresh water [Kelvin] REAL(wp), PUBLIC :: rau0 !: volumic mass of reference [kg/m3] REAL(wp), PUBLIC :: r1_rau0 !: = 1. / rau0 [m3/kg] REAL(wp), PUBLIC :: rcp !: ocean specific heat [J/Kelvin] REAL(wp), PUBLIC :: r1_rcp !: = 1. / rcp [Kelvin/J] REAL(wp), PUBLIC :: rau0_rcp !: = rau0 * rcp REAL(wp), PUBLIC :: r1_rau0_rcp !: = 1. / ( rau0 * 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 = 2.46e+6_wp !: latent heat of vaporization for sea-water [J/kg] #LB REAL(wp), PUBLIC :: vkarmn = 0.4_wp !: 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 !#LB: !! Mainly used in OCE/SBC (removed from sbcblk.F90) REAL(wp), PARAMETER, PUBLIC :: rCp_dry = 1005.0_wp !: Specic heat of dry air, constant pressure [J/K/kg] REAL(wp), PARAMETER, PUBLIC :: rCp_vap = 1860.0_wp !: Specic heat of water vapor, constant pressure [J/K/kg] REAL(wp), PARAMETER, PUBLIC :: R_dry = 287.05_wp !: Specific gas constant for dry air [J/K/kg] REAL(wp), PARAMETER, PUBLIC :: R_vap = 461.495_wp !: Specific gas constant for water vapor [J/K/kg] REAL(wp), PARAMETER, PUBLIC :: reps0 = R_dry/R_vap !: ratio of gas constant for dry air and water vapor => ~ 0.622 REAL(wp), PARAMETER, PUBLIC :: rctv0 = R_vap/R_dry !: for virtual temperature (== (1-eps)/eps) => ~ 0.608 REAL(wp), PARAMETER, PUBLIC :: rCp_air = 1000.5_wp !: specific heat of air (only used for ice fluxes now...) REAL(wp), PARAMETER, PUBLIC :: rCd_ice = 1.4e-3_wp !: transfer coefficient over ice REAL(wp), PARAMETER, PUBLIC :: albo = 0.066_wp !: ocean albedo assumed to be constant ! REAL(wp), PARAMETER, PUBLIC :: rho0_a = 1.2_wp !: Approx. of density of air [kg/m^3] REAL(wp), PARAMETER, PUBLIC :: rho0_w = 1025._wp !: Density of sea-water (ECMWF->1025) [kg/m^3] REAL(wp), PARAMETER, PUBLIC :: roadrw = rho0_a/rho0_w !: Density ratio REAL(wp), PARAMETER, PUBLIC :: rCp0_w = 4190._wp !: Specific heat capacity of seawater (ECMWF 4190) [J/K/kg] REAL(wp), PARAMETER, PUBLIC :: rnu0_w = 1.e-6_wp !: kinetic viscosity of water [m^2/s] REAL(wp), PARAMETER, PUBLIC :: rk0_w = 0.6_wp !: thermal conductivity of water (at 20C) [W/m/K] ! REAL(wp), PARAMETER, PUBLIC :: emiss_w = 1._wp !: Surface emissivity (black-body long-wave radiation) of sea-water [] ! !: Theoretically close to 0.97! Yet, taken equal as 1 to account for ! !: the small fraction of downwelling shortwave reflected at the ! !: surface (Lind & Katsaros, 1986) REAL(wp), PARAMETER, PUBLIC :: rdct_qsat_salt = 0.98_wp !: reduction factor on specific humidity at saturation (q_sat(T_s)) due to salt REAL(wp), PARAMETER, PUBLIC :: rtt0 = 273.16_wp !: triple point of temperature [K] REAL(wp), PARAMETER, PUBLIC :: rcst_cs = 16._wp*grav*rho0_w*rCp0_w*rnu0_w*rnu0_w*rnu0_w/(rk0_w*rk0_w) !: for cool-skin parameterizations... !#LB. !!---------------------------------------------------------------------- !! NEMO/OCE 4.0 , NEMO Consortium (2018) !! $Id$ !! 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