| 1 | MODULE phycst |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE phycst *** |
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| 4 | !! Definition of of both ocean and ice parameters used in the code |
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| 5 | !!===================================================================== |
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| 6 | !! History : OPA ! 1990-10 (C. Levy - G. Madec) Original code |
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| 7 | !! 8.1 ! 1991-11 (G. Madec, M. Imbard) cosmetic changes |
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| 8 | !! NEMO 1.0 ! 2002-08 (G. Madec, C. Ethe) F90, add ice constants |
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| 9 | !! - ! 2006-08 (G. Madec) style |
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| 10 | !! 3.2 ! 2006-08 (S. Masson, G. Madec) suppress useless variables + style |
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| 11 | !! 3.4 ! 2011-11 (C. Harris) minor changes for CICE constants |
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| 12 | !!---------------------------------------------------------------------- |
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| 13 | |
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| 14 | !!---------------------------------------------------------------------- |
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| 15 | !! phy_cst : define and print physical constant and domain parameters |
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| 16 | !!---------------------------------------------------------------------- |
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| 17 | USE par_kind ! ocean parameters |
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| 18 | |
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| 19 | IMPLICIT NONE |
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| 20 | PRIVATE |
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| 21 | |
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| 22 | PUBLIC phy_cst ! routine called by inipar.F90 |
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| 23 | |
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| 24 | REAL(wp), PUBLIC :: rpi = 3.141592653589793_wp !: pi |
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| 25 | REAL(wp), PUBLIC :: rad = 3.141592653589793_wp / 180._wp !: conversion from degre into radian |
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| 26 | REAL(wp), PUBLIC :: rsmall = 0.5 * EPSILON( 1.e0 ) !: smallest real computer value |
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| 27 | |
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| 28 | REAL(wp), PUBLIC :: rday = 24.*60.*60. !: day [s] |
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| 29 | REAL(wp), PUBLIC :: rsiyea !: sideral year [s] |
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| 30 | REAL(wp), PUBLIC :: rsiday !: sideral day [s] |
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| 31 | REAL(wp), PUBLIC :: raamo = 12._wp !: number of months in one year |
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| 32 | REAL(wp), PUBLIC :: rjjhh = 24._wp !: number of hours in one day |
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| 33 | REAL(wp), PUBLIC :: rhhmm = 60._wp !: number of minutes in one hour |
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| 34 | REAL(wp), PUBLIC :: rmmss = 60._wp !: number of seconds in one minute |
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| 35 | REAL(wp), PUBLIC :: omega !: earth rotation parameter [s-1] |
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| 36 | REAL(wp), PUBLIC :: ra = 6371229._wp !: earth radius [m] |
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| 37 | REAL(wp), PUBLIC :: grav = 9.80665_wp !: gravity [m/s2] |
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| 38 | |
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| 39 | REAL(wp), PUBLIC :: rtt = 273.16_wp !: triple point of temperature [Kelvin] |
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| 40 | REAL(wp), PUBLIC :: rt0 = 273.15_wp !: freezing point of fresh water [Kelvin] |
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| 41 | REAL(wp), PUBLIC :: rt0_snow = 273.15_wp !: melting point of snow [Kelvin] |
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| 42 | #if defined key_lim3 |
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| 43 | REAL(wp), PUBLIC :: rt0_ice = 273.15_wp !: melting point of ice [Kelvin] |
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| 44 | #else |
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| 45 | REAL(wp), PUBLIC :: rt0_ice = 273.05_wp !: melting point of ice [Kelvin] |
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| 46 | #endif |
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| 47 | REAL(wp), PUBLIC :: rau0 = 1026._wp !: volumic mass of reference [kg/m3] |
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| 48 | REAL(wp), PUBLIC :: r1_rau0 !: = 1. / rau0 [m3/kg] |
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| 49 | REAL(wp), PUBLIC :: rcp = 3991.86795711963_wp !: ocean specific heat [J/Kelvin] |
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| 50 | REAL(wp), PUBLIC :: r1_rcp !: = 1. / rcp [Kelvin/J] |
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| 51 | REAL(wp), PUBLIC :: rau0_rcp !: = rau0 * rcp |
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| 52 | REAL(wp), PUBLIC :: r1_rau0_rcp !: = 1. / ( rau0 * rcp ) |
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| 53 | |
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| 54 | REAL(wp), PUBLIC :: rhosn = 330._wp !: volumic mass of snow [kg/m3] |
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| 55 | REAL(wp), PUBLIC :: rhofw = 1000._wp !: volumic mass of freshwater in melt ponds [kg/m3] |
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| 56 | REAL(wp), PUBLIC :: emic = 0.97_wp !: emissivity of snow or ice |
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| 57 | REAL(wp), PUBLIC :: sice = 6.0_wp !: salinity of ice [psu] |
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| 58 | REAL(wp), PUBLIC :: soce = 34.7_wp !: salinity of sea [psu] |
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| 59 | REAL(wp), PUBLIC :: cevap = 2.5e+6_wp !: latent heat of evaporation (water) |
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| 60 | REAL(wp), PUBLIC :: srgamma = 0.9_wp !: correction factor for solar radiation (Oberhuber, 1974) |
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| 61 | REAL(wp), PUBLIC :: vkarmn = 0.4_wp !: von Karman constant |
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| 62 | REAL(wp), PUBLIC :: stefan = 5.67e-8_wp !: Stefan-Boltzmann constant |
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| 63 | |
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| 64 | #if defined key_lim3 || defined key_cice |
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| 65 | REAL(wp), PUBLIC :: rhoic = 917._wp !: volumic mass of sea ice [kg/m3] |
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| 66 | REAL(wp), PUBLIC :: rcdic = 2.034396_wp !: thermal conductivity of fresh ice [W/m/K] |
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| 67 | REAL(wp), PUBLIC :: cpic = 2067.0_wp !: specific heat of fresh ice [J/kg/K] |
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| 68 | REAL(wp), PUBLIC :: lsub = 2.834e+6_wp !: pure ice latent heat of sublimation [J/kg] |
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| 69 | REAL(wp), PUBLIC :: lfus = 0.334e+6_wp !: latent heat of fusion of fresh ice [J/kg] |
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| 70 | REAL(wp), PUBLIC :: tmut = 0.054_wp !: decrease of seawater meltpoint with salinity |
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| 71 | REAL(wp), PUBLIC :: xlsn !: = lfus*rhosn (volumetric latent heat fusion of snow) [J/m3] |
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| 72 | #else |
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| 73 | REAL(wp), PUBLIC :: rhoic = 900._wp !: volumic mass of sea ice [kg/m3] |
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| 74 | REAL(wp), PUBLIC :: rcdic = 2.034396_wp !: conductivity of the ice [W/m/K] |
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| 75 | REAL(wp), PUBLIC :: rcpic = 1.8837e+6_wp !: volumetric specific heat for ice [J/m3/K] |
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| 76 | REAL(wp), PUBLIC :: cpic !: = rcpic / rhoic (specific heat for ice) [J/Kg/K] |
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| 77 | REAL(wp), PUBLIC :: rcdsn = 0.22_wp !: conductivity of the snow [W/m/K] |
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| 78 | REAL(wp), PUBLIC :: rcpsn = 6.9069e+5_wp !: volumetric specific heat for snow [J/m3/K] |
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| 79 | REAL(wp), PUBLIC :: xlsn = 110.121e+6_wp !: volumetric latent heat fusion of snow [J/m3] |
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| 80 | REAL(wp), PUBLIC :: lfus !: = xlsn / rhosn (latent heat of fusion of fresh ice) [J/Kg] |
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| 81 | REAL(wp), PUBLIC :: xlic = 300.33e+6_wp !: volumetric latent heat fusion of ice [J/m3] |
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| 82 | REAL(wp), PUBLIC :: xsn = 2.8e+6_wp !: volumetric latent heat of sublimation of snow [J/m3] |
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| 83 | #endif |
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| 84 | #if defined key_cice |
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| 85 | REAL(wp), PUBLIC :: rcdsn = 0.31_wp !: thermal conductivity of snow [W/m/K], now namelist parameter for LIM3 |
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| 86 | #endif |
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| 87 | #if defined key_lim3 |
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| 88 | REAL(wp), PUBLIC :: r1_rhoic !: 1 / rhoic |
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| 89 | REAL(wp), PUBLIC :: r1_rhosn !: 1 / rhosn |
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| 90 | REAL(wp), PUBLIC :: r1_cpic !: 1 / cpic |
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| 91 | #endif |
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| 92 | !!---------------------------------------------------------------------- |
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| 93 | !! NEMO/OPA 3.3 , NEMO Consortium (2010) |
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| 94 | !! $Id: phycst.F90 9169 2017-12-26 16:32:56Z gm $ |
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| 95 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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| 96 | !!---------------------------------------------------------------------- |
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| 97 | |
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| 98 | CONTAINS |
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| 99 | |
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| 100 | SUBROUTINE phy_cst(lwp, numout) |
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| 101 | LOGICAL, INTENT(IN) :: lwp |
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| 102 | INTEGER, INTENT(IN) :: numout |
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| 103 | !!---------------------------------------------------------------------- |
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| 104 | !! *** ROUTINE phy_cst *** |
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| 105 | !! |
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| 106 | !! ** Purpose : set and print the constants |
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| 107 | !!---------------------------------------------------------------------- |
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| 108 | |
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| 109 | IF(lwp) WRITE(numout,*) |
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| 110 | IF(lwp) WRITE(numout,*) 'phy_cst : initialization of ocean parameters and constants' |
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| 111 | IF(lwp) WRITE(numout,*) '~~~~~~~' |
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| 112 | |
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| 113 | ! Define & print constants |
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| 114 | ! ------------------------ |
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| 115 | IF(lwp) WRITE(numout,*) |
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| 116 | IF(lwp) WRITE(numout,*) ' Constants' |
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| 117 | |
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| 118 | IF(lwp) WRITE(numout,*) |
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| 119 | IF(lwp) WRITE(numout,*) ' mathematical constant rpi = ', rpi |
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| 120 | |
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| 121 | rsiyea = 365.25_wp * rday * 2._wp * rpi / 6.283076_wp |
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| 122 | rsiday = rday / ( 1._wp + rday / rsiyea ) |
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| 123 | #if defined key_cice |
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| 124 | omega = 7.292116e-05 |
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| 125 | #else |
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| 126 | omega = 2._wp * rpi / rsiday |
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| 127 | #endif |
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| 128 | IF(lwp) WRITE(numout,*) |
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| 129 | IF(lwp) WRITE(numout,*) ' day rday = ', rday, ' s' |
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| 130 | IF(lwp) WRITE(numout,*) ' sideral year rsiyea = ', rsiyea, ' s' |
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| 131 | IF(lwp) WRITE(numout,*) ' sideral day rsiday = ', rsiday, ' s' |
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| 132 | IF(lwp) WRITE(numout,*) ' omega omega = ', omega, ' s^-1' |
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| 133 | IF(lwp) WRITE(numout,*) |
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| 134 | IF(lwp) WRITE(numout,*) ' nb of months per year raamo = ', raamo, ' months' |
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| 135 | IF(lwp) WRITE(numout,*) ' nb of hours per day rjjhh = ', rjjhh, ' hours' |
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| 136 | IF(lwp) WRITE(numout,*) ' nb of minutes per hour rhhmm = ', rhhmm, ' mn' |
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| 137 | IF(lwp) WRITE(numout,*) ' nb of seconds per minute rmmss = ', rmmss, ' s' |
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| 138 | IF(lwp) WRITE(numout,*) |
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| 139 | IF(lwp) WRITE(numout,*) ' earth radius ra = ', ra, ' m' |
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| 140 | IF(lwp) WRITE(numout,*) ' gravity grav = ', grav , ' m/s^2' |
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| 141 | IF(lwp) WRITE(numout,*) |
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| 142 | IF(lwp) WRITE(numout,*) ' triple point of temperature rtt = ', rtt , ' K' |
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| 143 | IF(lwp) WRITE(numout,*) ' freezing point of water rt0 = ', rt0 , ' K' |
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| 144 | IF(lwp) WRITE(numout,*) ' melting point of snow rt0_snow = ', rt0_snow, ' K' |
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| 145 | IF(lwp) WRITE(numout,*) ' melting point of ice rt0_ice = ', rt0_ice , ' K' |
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| 146 | IF(lwp) WRITE(numout,*) |
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| 147 | IF(lwp) WRITE(numout,*) ' reference density and heat capacity now defined in eosbn2.f90' |
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| 148 | |
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| 149 | #if defined key_lim3 || defined key_cice |
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| 150 | xlsn = lfus * rhosn ! volumetric latent heat fusion of snow [J/m3] |
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| 151 | #else |
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| 152 | cpic = rcpic / rhoic ! specific heat for ice [J/Kg/K] |
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| 153 | lfus = xlsn / rhosn ! latent heat of fusion of fresh ice |
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| 154 | #endif |
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| 155 | #if defined key_lim3 |
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| 156 | r1_rhoic = 1._wp / rhoic |
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| 157 | r1_rhosn = 1._wp / rhosn |
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| 158 | r1_cpic = 1._wp / cpic |
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| 159 | #endif |
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| 160 | IF(lwp) THEN |
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| 161 | WRITE(numout,*) |
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| 162 | #if defined key_cice |
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| 163 | WRITE(numout,*) ' thermal conductivity of the snow = ', rcdsn , ' J/s/m/K' |
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| 164 | #endif |
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| 165 | WRITE(numout,*) ' thermal conductivity of pure ice = ', rcdic , ' J/s/m/K' |
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| 166 | WRITE(numout,*) ' fresh ice specific heat = ', cpic , ' J/kg/K' |
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| 167 | WRITE(numout,*) ' latent heat of fusion of fresh ice / snow = ', lfus , ' J/kg' |
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| 168 | #if defined key_lim3 || defined key_cice |
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| 169 | WRITE(numout,*) ' latent heat of subl. of fresh ice / snow = ', lsub , ' J/kg' |
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| 170 | #else |
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| 171 | WRITE(numout,*) ' density times specific heat for snow = ', rcpsn , ' J/m^3/K' |
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| 172 | WRITE(numout,*) ' density times specific heat for ice = ', rcpic , ' J/m^3/K' |
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| 173 | WRITE(numout,*) ' volumetric latent heat fusion of sea ice = ', xlic , ' J/m' |
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| 174 | WRITE(numout,*) ' latent heat of sublimation of snow = ', xsn , ' J/kg' |
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| 175 | #endif |
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| 176 | WRITE(numout,*) ' volumetric latent heat fusion of snow = ', xlsn , ' J/m^3' |
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| 177 | WRITE(numout,*) ' density of sea ice = ', rhoic , ' kg/m^3' |
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| 178 | WRITE(numout,*) ' density of snow = ', rhosn , ' kg/m^3' |
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| 179 | WRITE(numout,*) ' density of freshwater (in melt ponds) = ', rhofw , ' kg/m^3' |
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| 180 | WRITE(numout,*) ' emissivity of snow or ice = ', emic |
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| 181 | WRITE(numout,*) ' salinity of ice = ', sice , ' psu' |
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| 182 | WRITE(numout,*) ' salinity of sea = ', soce , ' psu' |
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| 183 | WRITE(numout,*) ' latent heat of evaporation (water) = ', cevap , ' J/m^3' |
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| 184 | WRITE(numout,*) ' correction factor for solar radiation = ', srgamma |
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| 185 | WRITE(numout,*) ' von Karman constant = ', vkarmn |
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| 186 | WRITE(numout,*) ' Stefan-Boltzmann constant = ', stefan , ' J/s/m^2/K^4' |
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| 187 | WRITE(numout,*) |
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| 188 | WRITE(numout,*) ' conversion: degre ==> radian rad = ', rad |
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| 189 | WRITE(numout,*) |
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| 190 | WRITE(numout,*) ' smallest real computer value rsmall = ', rsmall |
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| 191 | ENDIF |
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| 192 | |
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| 193 | END SUBROUTINE phy_cst |
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| 194 | |
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| 195 | !!====================================================================== |
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| 196 | END MODULE phycst |
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