| 1 | MODULE eosbn2 |
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| 2 | !!============================================================================== |
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| 3 | !! *** MODULE eosbn2 *** |
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| 4 | !! Ocean diagnostic variable : equation of state - in situ and potential density |
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| 5 | !! - Brunt-Vaisala frequency |
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| 6 | !!============================================================================== |
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| 7 | |
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| 8 | !!---------------------------------------------------------------------- |
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| 9 | !! eos : generic interface of the equation of state |
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| 10 | !! eos_insitu : Compute the in situ density |
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| 11 | !! eos_insitu_pot : Compute the insitu and surface referenced potential |
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| 12 | !! volumic mass |
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| 13 | !! eos_insitu_2d : Compute the in situ density for 2d fields |
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| 14 | !! eos_bn2 : Compute the Brunt-Vaisala frequency |
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| 15 | !! eos_init : set eos parameters (namelist) |
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| 16 | !!---------------------------------------------------------------------- |
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| 17 | !! * Modules used |
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| 18 | USE dom_oce ! ocean space and time domain |
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| 19 | USE phycst ! physical constants |
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| 20 | USE in_out_manager ! I/O manager |
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| 21 | USE zdfddm ! vertical physics: double diffusion |
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| 22 | |
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| 23 | IMPLICIT NONE |
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| 24 | PRIVATE |
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| 25 | |
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| 26 | !! * Interface |
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| 27 | INTERFACE eos |
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| 28 | MODULE PROCEDURE eos_insitu, eos_insitu_pot, eos_insitu_2d |
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| 29 | END INTERFACE |
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| 30 | INTERFACE bn2 |
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| 31 | MODULE PROCEDURE eos_bn2 |
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| 32 | END INTERFACE |
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| 33 | |
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| 34 | !! * Routine accessibility |
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| 35 | PUBLIC eos ! called by step.F90, inidtr.F90, tranpc.F90 and intgrd.F90 |
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| 36 | PUBLIC bn2 ! called by step.F90 |
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| 37 | |
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| 38 | !! * Share module variables |
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| 39 | INTEGER , PUBLIC :: & !: nameos : ocean physical parameters |
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| 40 | neos = 0, & !: = 0/1/2 type of eq. of state and Brunt-Vaisala frequ. |
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| 41 | neos_init = 0 !: control flag for initialization |
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| 42 | |
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| 43 | REAL(wp), PUBLIC :: & !: nameos : ocean physical parameters |
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| 44 | ralpha = 2.0e-4, & !: thermal expension coeff. (linear equation of state) |
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| 45 | rbeta = 7.7e-4 !: saline expension coeff. (linear equation of state) |
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| 46 | |
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| 47 | !! * Substitutions |
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| 48 | # include "domzgr_substitute.h90" |
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| 49 | # include "vectopt_loop_substitute.h90" |
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| 50 | !!---------------------------------------------------------------------- |
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| 51 | !! OPA 9.0 , LOCEAN-IPSL (2005) |
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| 52 | !! $Header$ |
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| 53 | !! This software is governed by the CeCILL licence see modipsl/doc/NEMO_CeCILL.txt |
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| 54 | !!---------------------------------------------------------------------- |
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| 55 | |
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| 56 | CONTAINS |
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| 57 | |
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| 58 | SUBROUTINE eos_insitu ( ptem, psal, prd ) |
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| 59 | !!---------------------------------------------------------------------- |
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| 60 | !! *** ROUTINE eos_insitu *** |
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| 61 | !! |
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| 62 | !! ** Purpose : Compute the in situ density (ratio rho/rau0) from |
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| 63 | !! potential temperature and salinity using an equation of state |
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| 64 | !! defined through the namelist parameter neos. |
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| 65 | !! |
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| 66 | !! ** Method : 3 cases: |
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| 67 | !! neos = 0 : Jackett and McDougall (1994) equation of state. |
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| 68 | !! the in situ density is computed directly as a function of |
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| 69 | !! potential temperature relative to the surface (the opa t |
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| 70 | !! variable), salt and pressure (assuming no pressure variation |
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| 71 | !! along geopotential surfaces, i.e. the pressure p in decibars |
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| 72 | !! is approximated by the depth in meters. |
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| 73 | !! prd(t,s,p) = ( rho(t,s,p) - rau0 ) / rau0 |
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| 74 | !! with pressure p decibars |
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| 75 | !! potential temperature t deg celsius |
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| 76 | !! salinity s psu |
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| 77 | !! reference volumic mass rau0 kg/m**3 |
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| 78 | !! in situ volumic mass rho kg/m**3 |
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| 79 | !! in situ density anomalie prd no units |
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| 80 | !! Check value: rho = 1060.93298 kg/m**3 for p=10000 dbar, |
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| 81 | !! t = 40 deg celcius, s=40 psu |
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| 82 | !! neos = 1 : linear equation of state function of temperature only |
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| 83 | !! prd(t) = 0.0285 - ralpha * t |
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| 84 | !! neos = 2 : linear equation of state function of temperature and |
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| 85 | !! salinity |
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| 86 | !! prd(t,s) = rbeta * s - ralpha * tn - 1. |
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| 87 | !! Note that no boundary condition problem occurs in this routine |
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| 88 | !! as (ptem,psal) are defined over the whole domain. |
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| 89 | !! |
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| 90 | !! ** Action : compute prd , the in situ density (no units) |
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| 91 | !! |
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| 92 | !! References : |
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| 93 | !! Jackett, D.R., and T.J. McDougall. J. Atmos. Ocean. Tech., 1994 |
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| 94 | !! |
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| 95 | !! History : |
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| 96 | !! ! 89-03 (o. Marti) Original code |
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| 97 | !! ! 94-08 (G. Madec) |
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| 98 | !! ! 96-01 (G. Madec) statement function for e3 |
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| 99 | !! ! 97-07 (G. Madec) introduction of neos, OPA8.1 |
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| 100 | !! ! 97-07 (G. Madec) density instead of volumic mass |
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| 101 | !! ! 99-02 (G. Madec, N. Grima) semi-implicit pressure gradient |
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| 102 | !! ! 01-09 (M. Ben Jelloul) bugfix |
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| 103 | !!---------------------------------------------------------------------- |
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| 104 | !! * Arguments |
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| 105 | REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT( in ) :: & |
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| 106 | ptem, & ! potential temperature |
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| 107 | psal ! salinity |
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| 108 | REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT( out ) :: & |
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| 109 | prd ! potential density (surface referenced) |
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| 110 | |
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| 111 | !! * Local declarations |
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| 112 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 113 | REAL(wp) :: & |
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| 114 | zt , zs , zh , zsr, & ! temporary scalars |
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| 115 | zr1, zr2, zr3, zr4, & ! " " |
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| 116 | zrhop, ze, zbw, zb, & ! " " |
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| 117 | zd , zc , zaw, za , & ! " " |
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| 118 | zb1, za1, zkw, zk0 ! " " |
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| 119 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: & |
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| 120 | zws ! temporary workspace |
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| 121 | !!---------------------------------------------------------------------- |
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| 122 | |
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| 123 | |
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| 124 | ! initialization (in not already done) |
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| 125 | IF( neos_init == 0 ) CALL eos_init |
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| 126 | |
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| 127 | |
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| 128 | SELECT CASE ( neos ) |
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| 129 | |
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| 130 | CASE ( 0 ) ! Jackett and McDougall (1994) formulation |
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| 131 | |
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| 132 | !CDIR NOVERRCHK |
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| 133 | zws(:,:,:) = SQRT( ABS( psal(:,:,:) ) ) |
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| 134 | |
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| 135 | ! ! =============== |
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| 136 | DO jk = 1, jpkm1 ! Horizontal slab |
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| 137 | ! ! =============== |
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| 138 | DO jj = 1, jpj |
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| 139 | DO ji = 1, jpi |
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| 140 | zt = ptem(ji,jj,jk) |
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| 141 | zs = psal(ji,jj,jk) |
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| 142 | ! depth |
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| 143 | zh = fsdept(ji,jj,jk) |
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| 144 | ! square root salinity |
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| 145 | zsr= zws(ji,jj,jk) |
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| 146 | ! compute volumic mass pure water at atm pressure |
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| 147 | zr1= ( ( ( ( 6.536332e-9*zt-1.120083e-6 )*zt+1.001685e-4)*zt & |
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| 148 | -9.095290e-3 )*zt+6.793952e-2 )*zt+999.842594 |
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| 149 | ! seawater volumic mass atm pressure |
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| 150 | zr2= ( ( ( 5.3875e-9*zt-8.2467e-7 ) *zt+7.6438e-5 ) *zt & |
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| 151 | -4.0899e-3 ) *zt+0.824493 |
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| 152 | zr3= ( -1.6546e-6*zt+1.0227e-4 ) *zt-5.72466e-3 |
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| 153 | zr4= 4.8314e-4 |
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| 154 | |
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| 155 | ! potential volumic mass (reference to the surface) |
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| 156 | zrhop= ( zr4*zs + zr3*zsr + zr2 ) *zs + zr1 |
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| 157 | |
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| 158 | ! add the compression terms |
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| 159 | ze = ( -3.508914e-8*zt-1.248266e-8 ) *zt-2.595994e-6 |
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| 160 | zbw= ( 1.296821e-6*zt-5.782165e-9 ) *zt+1.045941e-4 |
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| 161 | zb = zbw + ze * zs |
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| 162 | |
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| 163 | zd = -2.042967e-2 |
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| 164 | zc = (-7.267926e-5*zt+2.598241e-3 ) *zt+0.1571896 |
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| 165 | zaw= ( ( 5.939910e-6*zt+2.512549e-3 ) *zt-0.1028859 ) *zt - 4.721788 |
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| 166 | za = ( zd*zsr + zc ) *zs + zaw |
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| 167 | |
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| 168 | zb1= (-0.1909078*zt+7.390729 ) *zt-55.87545 |
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| 169 | za1= ( ( 2.326469e-3*zt+1.553190)*zt-65.00517 ) *zt+1044.077 |
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| 170 | zkw= ( ( (-1.361629e-4*zt-1.852732e-2 ) *zt-30.41638 ) *zt + 2098.925 ) *zt+190925.6 |
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| 171 | zk0= ( zb1*zsr + za1 )*zs + zkw |
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| 172 | |
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| 173 | ! masked in situ density anomaly |
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| 174 | prd(ji,jj,jk) = ( zrhop / ( 1.0 - zh / ( zk0 - zh * ( za - zh * zb ) ) ) & |
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| 175 | - rau0 ) / rau0 * tmask(ji,jj,jk) |
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| 176 | END DO |
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| 177 | END DO |
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| 178 | ! ! =============== |
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| 179 | END DO ! End of slab |
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| 180 | ! ! =============== |
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| 181 | |
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| 182 | |
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| 183 | CASE ( 1 ) ! Linear formulation function of temperature only |
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| 184 | |
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| 185 | ! ! =============== |
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| 186 | DO jk = 1, jpkm1 ! Horizontal slab |
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| 187 | ! ! =============== |
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| 188 | DO jj = 1, jpj |
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| 189 | DO ji = 1, jpi |
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| 190 | zt = ptem(ji,jj,jk) |
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| 191 | zs = psal(ji,jj,jk) |
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| 192 | ! ... density and potential volumic mass |
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| 193 | prd(ji,jj,jk) = ( 0.0285 - ralpha * zt ) * tmask(ji,jj,jk) |
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| 194 | END DO |
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| 195 | END DO |
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| 196 | ! ! =============== |
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| 197 | END DO ! End of slab |
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| 198 | ! ! =============== |
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| 199 | |
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| 200 | |
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| 201 | CASE ( 2 ) ! Linear formulation function of temperature and salinity |
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| 202 | |
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| 203 | ! ! =============== |
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| 204 | DO jk = 1, jpkm1 ! Horizontal slab |
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| 205 | ! ! =============== |
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| 206 | DO jj = 1, jpj |
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| 207 | DO ji = 1, jpi |
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| 208 | zt = ptem(ji,jj,jk) |
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| 209 | zs = psal(ji,jj,jk) |
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| 210 | ! ... density and potential volumic mass |
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| 211 | prd(ji,jj,jk) = ( rbeta * zs - ralpha * zt ) * tmask(ji,jj,jk) |
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| 212 | END DO |
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| 213 | END DO |
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| 214 | ! ! =============== |
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| 215 | END DO ! End of slab |
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| 216 | ! ! =============== |
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| 217 | |
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| 218 | CASE DEFAULT |
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| 219 | |
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| 220 | IF(lwp) WRITE(numout,cform_err) |
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| 221 | IF(lwp) WRITE(numout,*) ' bad flag value for neos = ', neos |
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| 222 | nstop = nstop + 1 |
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| 223 | |
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| 224 | END SELECT |
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| 225 | |
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| 226 | IF(l_ctl) WRITE(numout,*) ' eos : ', SUM( prd(1:nictl+1,1:njctl+1,:) ) |
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| 227 | |
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| 228 | END SUBROUTINE eos_insitu |
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| 229 | |
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| 230 | |
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| 231 | SUBROUTINE eos_insitu_pot ( ptem, psal, prd, prhop) |
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| 232 | !!---------------------------------------------------------------------- |
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| 233 | !! *** ROUTINE eos_insitu_pot *** |
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| 234 | !! |
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| 235 | !! ** Purpose : Compute the in situ density (ratio rho/rau0) and the |
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| 236 | !! potential volumic mass (Kg/m3) from potential temperature and |
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| 237 | !! salinity fields using an equation of state defined through the |
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| 238 | !! namelist parameter neos. |
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| 239 | !! |
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| 240 | !! ** Method : |
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| 241 | !! neos = 0 : Jackett and McDougall (1994) equation of state. |
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| 242 | !! the in situ density is computed directly as a function of |
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| 243 | !! potential temperature relative to the surface (the opa t |
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| 244 | !! variable), salt and pressure (assuming no pressure variation |
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| 245 | !! along geopotential surfaces, i.e. the pressure p in decibars |
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| 246 | !! is approximated by the depth in meters. |
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| 247 | !! prd(t,s,p) = ( rho(t,s,p) - rau0 ) / rau0 |
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| 248 | !! rhop(t,s) = rho(t,s,0) |
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| 249 | !! with pressure p decibars |
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| 250 | !! potential temperature t deg celsius |
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| 251 | !! salinity s psu |
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| 252 | !! reference volumic mass rau0 kg/m**3 |
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| 253 | !! in situ volumic mass rho kg/m**3 |
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| 254 | !! in situ density anomalie prd no units |
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| 255 | !! |
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| 256 | !! Check value: rho = 1060.93298 kg/m**3 for p=10000 dbar, |
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| 257 | !! t = 40 deg celcius, s=40 psu |
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| 258 | !! |
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| 259 | !! neos = 1 : linear equation of state function of temperature only |
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| 260 | !! prd(t) = ( rho(t) - rau0 ) / rau0 = 0.028 - ralpha * t |
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| 261 | !! rhop(t,s) = rho(t,s) |
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| 262 | !! |
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| 263 | !! neos = 2 : linear equation of state function of temperature and |
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| 264 | !! salinity |
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| 265 | !! prd(t,s) = ( rho(t,s) - rau0 ) / rau0 |
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| 266 | !! = rbeta * s - ralpha * tn - 1. |
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| 267 | !! rhop(t,s) = rho(t,s) |
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| 268 | !! Note that no boundary condition problem occurs in this routine |
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| 269 | !! as (tn,sn) or (ta,sa) are defined over the whole domain. |
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| 270 | !! |
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| 271 | !! ** Action : - prd , the in situ density (no units) |
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| 272 | !! - prhop, the potential volumic mass (Kg/m3) |
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| 273 | !! |
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| 274 | !! References : |
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| 275 | !! Jackett, D.R., and T.J. McDougall. J. Atmos. Ocean. Tech., 1994 |
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| 276 | !! Brown, J. A. and K. A. Campana. Mon. Weather Rev., 1978 |
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| 277 | !! |
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| 278 | !! History : |
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| 279 | !! 4.0 ! 89-03 (O. Marti) |
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| 280 | !! ! 94-08 (G. Madec) |
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| 281 | !! ! 96-01 (G. Madec) statement function for e3 |
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| 282 | !! ! 97-07 (G. Madec) introduction of neos, OPA8.1 |
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| 283 | !! ! 97-07 (G. Madec) density instead of volumic mass |
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| 284 | !! ! 99-02 (G. Madec, N. Grima) semi-implicit pressure gradient |
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| 285 | !! ! 01-09 (M. Ben Jelloul) bugfix |
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| 286 | !! 9.0 ! 03-08 (G. Madec) F90, free form |
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| 287 | !!---------------------------------------------------------------------- |
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| 288 | !! * Arguments |
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| 289 | REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT( in ) :: & |
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| 290 | ptem, & ! potential temperature |
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| 291 | psal ! salinity |
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| 292 | REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT( out ) :: & |
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| 293 | prd, & ! potential density (surface referenced) |
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| 294 | prhop ! potential density (surface referenced) |
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| 295 | |
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| 296 | !! * Local declarations |
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| 297 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 298 | REAL(wp) :: & ! temporary scalars |
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| 299 | zt, zs, zh, zsr, zr1, zr2, zr3, zr4, zrhop, ze, zbw, & |
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| 300 | zb, zd, zc, zaw, za, zb1, za1, zkw, zk0 |
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| 301 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: zws |
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| 302 | !!---------------------------------------------------------------------- |
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| 303 | |
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| 304 | ! initialization (in not already done) |
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| 305 | IF( neos_init == 0 ) CALL eos_init |
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| 306 | |
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| 307 | |
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| 308 | SELECT CASE ( neos ) |
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| 309 | |
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| 310 | CASE ( 0 ) ! Jackett and McDougall (1994) formulation |
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| 311 | |
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| 312 | !CDIR NOVERRCHK |
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| 313 | zws(:,:,:) = SQRT( ABS( psal(:,:,:) ) ) |
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| 314 | |
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| 315 | ! ! =============== |
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| 316 | DO jk = 1, jpkm1 ! Horizontal slab |
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| 317 | ! ! =============== |
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| 318 | DO jj = 1, jpj |
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| 319 | DO ji = 1, jpi |
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| 320 | zt = ptem(ji,jj,jk) |
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| 321 | zs = psal(ji,jj,jk) |
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| 322 | ! depth |
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| 323 | zh = fsdept(ji,jj,jk) |
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| 324 | ! square root salinity |
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| 325 | !!Edmee zsr= SQRT( ABS( zs ) ) |
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| 326 | zsr= zws(ji,jj,jk) |
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| 327 | ! compute volumic mass pure water at atm pressure |
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| 328 | zr1= ( ( ( ( 6.536332e-9*zt-1.120083e-6 )*zt+1.001685e-4)*zt & |
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| 329 | -9.095290e-3 )*zt+6.793952e-2 )*zt+999.842594 |
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| 330 | ! seawater volumic mass atm pressure |
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| 331 | zr2= ( ( ( 5.3875e-9*zt-8.2467e-7 ) *zt+7.6438e-5 ) *zt & |
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| 332 | -4.0899e-3 ) *zt+0.824493 |
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| 333 | zr3= ( -1.6546e-6*zt+1.0227e-4 ) *zt-5.72466e-3 |
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| 334 | zr4= 4.8314e-4 |
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| 335 | |
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| 336 | ! potential volumic mass (reference to the surface) |
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| 337 | zrhop= ( zr4*zs + zr3*zsr + zr2 ) *zs + zr1 |
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| 338 | |
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| 339 | ! save potential volumic mass |
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| 340 | prhop(ji,jj,jk) = zrhop * tmask(ji,jj,jk) |
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| 341 | |
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| 342 | ! add the compression terms |
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| 343 | ze = ( -3.508914e-8*zt-1.248266e-8 ) *zt-2.595994e-6 |
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| 344 | zbw= ( 1.296821e-6*zt-5.782165e-9 ) *zt+1.045941e-4 |
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| 345 | zb = zbw + ze * zs |
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| 346 | |
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| 347 | zd = -2.042967e-2 |
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| 348 | zc = (-7.267926e-5*zt+2.598241e-3 ) *zt+0.1571896 |
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| 349 | zaw= ( ( 5.939910e-6*zt+2.512549e-3 ) *zt-0.1028859 ) *zt - 4.721788 |
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| 350 | za = ( zd*zsr + zc ) *zs + zaw |
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| 351 | |
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| 352 | zb1= (-0.1909078*zt+7.390729 ) *zt-55.87545 |
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| 353 | za1= ( ( 2.326469e-3*zt+1.553190)*zt-65.00517 ) *zt+1044.077 |
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| 354 | zkw= ( ( (-1.361629e-4*zt-1.852732e-2 ) *zt-30.41638 ) *zt + 2098.925 ) *zt+190925.6 |
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| 355 | zk0= ( zb1*zsr + za1 )*zs + zkw |
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| 356 | |
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| 357 | ! masked in situ density anomaly |
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| 358 | prd(ji,jj,jk) = ( zrhop / ( 1.0 - zh / ( zk0 - zh * ( za - zh * zb ) ) ) & |
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| 359 | - rau0 ) / rau0 * tmask(ji,jj,jk) |
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| 360 | END DO |
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| 361 | END DO |
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| 362 | ! ! =============== |
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| 363 | END DO ! End of slab |
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| 364 | ! ! =============== |
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| 365 | |
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| 366 | |
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| 367 | CASE ( 1 ) ! Linear formulation function of temperature only |
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| 368 | |
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| 369 | ! ! =============== |
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| 370 | DO jk = 1, jpkm1 ! Horizontal slab |
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| 371 | ! ! =============== |
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| 372 | DO jj = 1, jpj |
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| 373 | DO ji = 1, jpi |
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| 374 | zt = ptem(ji,jj,jk) |
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| 375 | zs = psal(ji,jj,jk) |
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| 376 | ! ... density and potential volumic mass |
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| 377 | prd (ji,jj,jk) = ( 0.0285 - ralpha * zt ) * tmask(ji,jj,jk) |
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| 378 | prhop(ji,jj,jk) = ( rau0 * prd(ji,jj,jk) + rau0 ) * tmask(ji,jj,jk) |
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| 379 | END DO |
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| 380 | END DO |
|---|
| 381 | ! ! =============== |
|---|
| 382 | END DO ! End of slab |
|---|
| 383 | ! ! =============== |
|---|
| 384 | |
|---|
| 385 | |
|---|
| 386 | CASE ( 2 ) ! Linear formulation function of temperature and salinity |
|---|
| 387 | |
|---|
| 388 | ! ! =============== |
|---|
| 389 | DO jk = 1, jpkm1 ! Horizontal slab |
|---|
| 390 | ! ! =============== |
|---|
| 391 | DO jj = 1, jpj |
|---|
| 392 | DO ji = 1, jpi |
|---|
| 393 | zt = ptem(ji,jj,jk) |
|---|
| 394 | zs = psal(ji,jj,jk) |
|---|
| 395 | ! ... density and potential volumic mass |
|---|
| 396 | prd (ji,jj,jk) = ( rbeta * zs - ralpha * zt ) * tmask(ji,jj,jk) |
|---|
| 397 | prhop(ji,jj,jk) = ( rau0 * prd(ji,jj,jk) + rau0 ) * tmask(ji,jj,jk) |
|---|
| 398 | END DO |
|---|
| 399 | END DO |
|---|
| 400 | ! ! =============== |
|---|
| 401 | END DO ! End of slab |
|---|
| 402 | ! ! =============== |
|---|
| 403 | |
|---|
| 404 | CASE DEFAULT |
|---|
| 405 | |
|---|
| 406 | IF(lwp) WRITE(numout,cform_err) |
|---|
| 407 | IF(lwp) WRITE(numout,*) ' bad flag value for neos = ', neos |
|---|
| 408 | nstop = nstop + 1 |
|---|
| 409 | |
|---|
| 410 | END SELECT |
|---|
| 411 | |
|---|
| 412 | IF(l_ctl) WRITE(numout,*) ' eos-p: ', SUM( prd(1:nictl+1,1:njctl+1,:) ), ' pot : ', SUM( prhop(1:nictl+1,1:njctl+1,:) ) |
|---|
| 413 | |
|---|
| 414 | END SUBROUTINE eos_insitu_pot |
|---|
| 415 | |
|---|
| 416 | SUBROUTINE eos_insitu_2d ( ptem, psal, pdep, prd ) |
|---|
| 417 | !!---------------------------------------------------------------------- |
|---|
| 418 | !! *** ROUTINE eos_insitu_2d *** |
|---|
| 419 | !! |
|---|
| 420 | !! ** Purpose : Compute the in situ density (ratio rho/rau0) from |
|---|
| 421 | !! potential temperature and salinity using an equation of state |
|---|
| 422 | !! defined through the namelist parameter neos. * 2D field case |
|---|
| 423 | !! |
|---|
| 424 | !! ** Method : |
|---|
| 425 | !! neos = 0 : Jackett and McDougall (1994) equation of state. |
|---|
| 426 | !! the in situ density is computed directly as a function of |
|---|
| 427 | !! potential temperature relative to the surface (the opa t |
|---|
| 428 | !! variable), salt and pressure (assuming no pressure variation |
|---|
| 429 | !! along geopotential surfaces, i.e. the pressure p in decibars |
|---|
| 430 | !! is approximated by the depth in meters. |
|---|
| 431 | !! prd(t,s,p) = ( rho(t,s,p) - rau0 ) / rau0 |
|---|
| 432 | !! with pressure p decibars |
|---|
| 433 | !! potential temperature t deg celsius |
|---|
| 434 | !! salinity s psu |
|---|
| 435 | !! reference volumic mass rau0 kg/m**3 |
|---|
| 436 | !! in situ volumic mass rho kg/m**3 |
|---|
| 437 | !! in situ density anomalie prd no units |
|---|
| 438 | !! Check value: rho = 1060.93298 kg/m**3 for p=10000 dbar, |
|---|
| 439 | !! t = 40 deg celcius, s=40 psu |
|---|
| 440 | !! neos = 1 : linear equation of state function of temperature only |
|---|
| 441 | !! prd(t) = 0.0285 - ralpha * t |
|---|
| 442 | !! neos = 2 : linear equation of state function of temperature and |
|---|
| 443 | !! salinity |
|---|
| 444 | !! prd(t,s) = rbeta * s - ralpha * tn - 1. |
|---|
| 445 | !! Note that no boundary condition problem occurs in this routine |
|---|
| 446 | !! as (ptem,psal) are defined over the whole domain. |
|---|
| 447 | !! |
|---|
| 448 | !! ** Action : - prd , the in situ density (no units) |
|---|
| 449 | !! |
|---|
| 450 | !! References : |
|---|
| 451 | !! Jackett, D.R., and T.J. McDougall. J. Atmos. Ocean. Tech., 1994 |
|---|
| 452 | !! |
|---|
| 453 | !! History : |
|---|
| 454 | !! 8.5 ! 02-11 (G. Madec, A. Bozec) partial step |
|---|
| 455 | !!---------------------------------------------------------------------- |
|---|
| 456 | !! * Arguments |
|---|
| 457 | REAL(wp), DIMENSION(jpi,jpj), INTENT( in ) :: & |
|---|
| 458 | ptem, & ! potential temperature |
|---|
| 459 | psal, & ! salinity |
|---|
| 460 | pdep ! depth |
|---|
| 461 | REAL(wp), DIMENSION(jpi,jpj), INTENT( out ) :: & |
|---|
| 462 | prd ! potential density (surface referenced) |
|---|
| 463 | |
|---|
| 464 | !! * Local declarations |
|---|
| 465 | INTEGER :: ji, jj ! dummy loop indices |
|---|
| 466 | REAL(wp) :: & ! temporary scalars |
|---|
| 467 | zt, zs, zh, zsr, zr1, zr2, zr3, zr4, zrhop, ze, zbw, & |
|---|
| 468 | zb, zd, zc, zaw, za, zb1, za1, zkw, zk0, & |
|---|
| 469 | zmask |
|---|
| 470 | REAL(wp), DIMENSION(jpi,jpj) :: zws |
|---|
| 471 | !!---------------------------------------------------------------------- |
|---|
| 472 | |
|---|
| 473 | |
|---|
| 474 | ! initialization (in not already done) |
|---|
| 475 | IF( neos_init == 0 ) CALL eos_init |
|---|
| 476 | |
|---|
| 477 | prd(:,:) = 0.e0 |
|---|
| 478 | |
|---|
| 479 | SELECT CASE ( neos ) |
|---|
| 480 | |
|---|
| 481 | CASE ( 0 ) ! Jackett and McDougall (1994) formulation |
|---|
| 482 | |
|---|
| 483 | !CDIR NOVERRCHK |
|---|
| 484 | DO jj = 1, jpjm1 |
|---|
| 485 | !CDIR NOVERRCHK |
|---|
| 486 | #if defined key_autotasking |
|---|
| 487 | DO ji = 1, jpim1 |
|---|
| 488 | #else |
|---|
| 489 | DO ji = 1, fs_jpim1 ! vector opt. |
|---|
| 490 | #endif |
|---|
| 491 | zws(ji,jj) = SQRT( ABS( psal(ji,jj) ) ) |
|---|
| 492 | END DO |
|---|
| 493 | END DO |
|---|
| 494 | |
|---|
| 495 | ! ! =============== |
|---|
| 496 | DO jj = 1, jpjm1 ! Horizontal slab |
|---|
| 497 | ! ! =============== |
|---|
| 498 | #if defined key_autotasking |
|---|
| 499 | DO ji = 1, jpim1 |
|---|
| 500 | #else |
|---|
| 501 | DO ji = 1, fs_jpim1 ! vector opt. |
|---|
| 502 | #endif |
|---|
| 503 | |
|---|
| 504 | zmask = tmask(ji,jj,1) ! land/sea bottom mask = surf. mask |
|---|
| 505 | |
|---|
| 506 | zt = ptem (ji,jj) ! interpolated T |
|---|
| 507 | zs = psal (ji,jj) ! interpolated S |
|---|
| 508 | zsr= zws(ji,jj) ! square root of interpolated S |
|---|
| 509 | zh = pdep(ji,jj) ! depth at the partial step level |
|---|
| 510 | |
|---|
| 511 | ! compute volumic mass pure water at atm pressure |
|---|
| 512 | zr1 = ( ( ( ( 6.536332e-9*zt-1.120083e-6 )*zt+1.001685e-4)*zt & |
|---|
| 513 | -9.095290e-3 )*zt+6.793952e-2 )*zt+999.842594 |
|---|
| 514 | ! seawater volumic mass atm pressure |
|---|
| 515 | zr2= ( ( ( 5.3875e-9*zt-8.2467e-7 )*zt+7.6438e-5 ) *zt & |
|---|
| 516 | -4.0899e-3 ) *zt+0.824493 |
|---|
| 517 | zr3= ( -1.6546e-6*zt+1.0227e-4 ) *zt-5.72466e-3 |
|---|
| 518 | zr4= 4.8314e-4 |
|---|
| 519 | |
|---|
| 520 | ! potential volumic mass (reference to the surface) |
|---|
| 521 | zrhop= ( zr4*zs + zr3*zsr + zr2 ) *zs + zr1 |
|---|
| 522 | |
|---|
| 523 | ! add the compression terms |
|---|
| 524 | ze = ( -3.508914e-8*zt-1.248266e-8 ) *zt-2.595994e-6 |
|---|
| 525 | zbw= ( 1.296821e-6*zt-5.782165e-9 ) *zt+1.045941e-4 |
|---|
| 526 | zb = zbw + ze * zs |
|---|
| 527 | |
|---|
| 528 | zd = -2.042967e-2 |
|---|
| 529 | zc = (-7.267926e-5*zt+2.598241e-3 ) *zt+0.1571896 |
|---|
| 530 | zaw= ( ( 5.939910e-6*zt+2.512549e-3 ) *zt-0.1028859 ) *zt -4.721788 |
|---|
| 531 | za = ( zd*zsr + zc ) *zs + zaw |
|---|
| 532 | |
|---|
| 533 | zb1= (-0.1909078*zt+7.390729 ) *zt-55.87545 |
|---|
| 534 | za1= ( ( 2.326469e-3*zt+1.553190)*zt-65.00517 ) *zt+1044.077 |
|---|
| 535 | zkw= ( ( (-1.361629e-4*zt-1.852732e-2 ) *zt-30.41638 ) *zt & |
|---|
| 536 | +2098.925 ) *zt+190925.6 |
|---|
| 537 | zk0= ( zb1*zsr + za1 )*zs + zkw |
|---|
| 538 | |
|---|
| 539 | ! masked in situ density anomaly |
|---|
| 540 | prd(ji,jj) = ( zrhop / ( 1.0 - zh / ( zk0 - zh * ( za - zh * zb ) ) ) - rau0 ) & |
|---|
| 541 | / rau0 * zmask |
|---|
| 542 | END DO |
|---|
| 543 | ! ! =============== |
|---|
| 544 | END DO ! End of slab |
|---|
| 545 | ! ! =============== |
|---|
| 546 | |
|---|
| 547 | |
|---|
| 548 | CASE ( 1 ) ! Linear formulation function of temperature only |
|---|
| 549 | |
|---|
| 550 | ! ! =============== |
|---|
| 551 | DO jj = 1, jpjm1 ! Horizontal slab |
|---|
| 552 | ! ! =============== |
|---|
| 553 | #if defined key_autotasking |
|---|
| 554 | DO ji = 1, jpim1 |
|---|
| 555 | #else |
|---|
| 556 | DO ji = 1, fs_jpim1 ! vector opt. |
|---|
| 557 | #endif |
|---|
| 558 | prd(ji,jj) = ( 0.0285 - ralpha * ptem(ji,jj) ) * tmask(ji,jj,1) |
|---|
| 559 | END DO |
|---|
| 560 | ! ! =============== |
|---|
| 561 | END DO ! End of slab |
|---|
| 562 | ! ! =============== |
|---|
| 563 | |
|---|
| 564 | |
|---|
| 565 | CASE ( 2 ) ! Linear formulation function of temperature and salinity |
|---|
| 566 | |
|---|
| 567 | ! ! =============== |
|---|
| 568 | DO jj = 1, jpjm1 ! Horizontal slab |
|---|
| 569 | ! ! =============== |
|---|
| 570 | #if defined key_autotasking |
|---|
| 571 | DO ji = 1, jpim1 |
|---|
| 572 | #else |
|---|
| 573 | DO ji = 1, fs_jpim1 ! vector opt. |
|---|
| 574 | #endif |
|---|
| 575 | prd(ji,jj) = ( rbeta * psal(ji,jj) - ralpha * ptem(ji,jj) ) * tmask(ji,jj,1) |
|---|
| 576 | END DO |
|---|
| 577 | ! ! =============== |
|---|
| 578 | END DO ! End of slab |
|---|
| 579 | ! ! =============== |
|---|
| 580 | |
|---|
| 581 | CASE DEFAULT |
|---|
| 582 | |
|---|
| 583 | IF(lwp) WRITE(numout,cform_err) |
|---|
| 584 | IF(lwp) WRITE(numout,*) ' bad flag value for neos = ', neos |
|---|
| 585 | nstop = nstop + 1 |
|---|
| 586 | |
|---|
| 587 | END SELECT |
|---|
| 588 | |
|---|
| 589 | IF(l_ctl) WRITE(numout,*) ' eos2d: ', SUM( prd(1:nictl,1:njctl) ) |
|---|
| 590 | |
|---|
| 591 | END SUBROUTINE eos_insitu_2d |
|---|
| 592 | |
|---|
| 593 | |
|---|
| 594 | SUBROUTINE eos_bn2( ptem, psal, pn2 ) |
|---|
| 595 | !!---------------------------------------------------------------------- |
|---|
| 596 | !! *** ROUTINE eos_bn2 *** |
|---|
| 597 | !! |
|---|
| 598 | !! ** Purpose : Compute the local Brunt-Vaisala frequency at the time- |
|---|
| 599 | !! step of the input arguments |
|---|
| 600 | !! |
|---|
| 601 | !! ** Method : |
|---|
| 602 | !! * neos = 0 : UNESCO sea water properties |
|---|
| 603 | !! The brunt-vaisala frequency is computed using the polynomial |
|---|
| 604 | !! polynomial expression of McDougall (1987): |
|---|
| 605 | !! N^2 = grav * beta * ( alpha/beta*dk[ t ] - dk[ s ] )/e3w |
|---|
| 606 | !! If lk_zdfddm=T, the heat/salt buoyancy flux ratio Rrau is |
|---|
| 607 | !! computed and used in zdfddm module : |
|---|
| 608 | !! Rrau = alpha/beta * ( dk[ t ] / dk[ s ] ) |
|---|
| 609 | !! * neos = 1 : linear equation of state (temperature only) |
|---|
| 610 | !! N^2 = grav * ralpha * dk[ t ]/e3w |
|---|
| 611 | !! * neos = 2 : linear equation of state (temperature & salinity) |
|---|
| 612 | !! N^2 = grav * (ralpha * dk[ t ] - rbeta * dk[ s ] ) / e3w |
|---|
| 613 | !! The use of potential density to compute N^2 introduces e r r o r |
|---|
| 614 | !! in the sign of N^2 at great depths. We recommand the use of |
|---|
| 615 | !! neos = 0, except for academical studies. |
|---|
| 616 | !! Macro-tasked on horizontal slab (jk-loop) |
|---|
| 617 | !! N.B. N^2 is set to zero at the first level (JK=1) in inidtr |
|---|
| 618 | !! and is never used at this level. |
|---|
| 619 | !! |
|---|
| 620 | !! ** Action : - pn2 : the brunt-vaisala frequency |
|---|
| 621 | !! |
|---|
| 622 | !! References : |
|---|
| 623 | !! McDougall, T. J., J. Phys. Oceanogr., 17, 1950-1964, 1987. |
|---|
| 624 | !! |
|---|
| 625 | !! History : |
|---|
| 626 | !! 6.0 ! 94-07 (G. Madec, M. Imbard) Original code |
|---|
| 627 | !! 8.0 ! 97-07 (G. Madec) introduction of statement functions |
|---|
| 628 | !! 8.5 ! 02-07 (G. Madec) Free form, F90 |
|---|
| 629 | !! 8.5 ! 02-08 (G. Madec) introduction of arguments |
|---|
| 630 | !!---------------------------------------------------------------------- |
|---|
| 631 | !! * Arguments |
|---|
| 632 | REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT( in ) :: & |
|---|
| 633 | ptem, & ! potential temperature |
|---|
| 634 | psal ! salinity |
|---|
| 635 | REAL(wp), DIMENSION(jpi,jpj,jpk), INTENT( out ) :: & |
|---|
| 636 | pn2 ! Brunt-Vaisala frequency |
|---|
| 637 | |
|---|
| 638 | !! * Local declarations |
|---|
| 639 | INTEGER :: ji, jj, jk ! dummy loop indices |
|---|
| 640 | REAL(wp) :: & |
|---|
| 641 | zgde3w, zt, zs, zh, & ! temporary scalars |
|---|
| 642 | zalbet, zbeta ! " " |
|---|
| 643 | #if defined key_zdfddm |
|---|
| 644 | REAL(wp) :: zds ! temporary scalars |
|---|
| 645 | #endif |
|---|
| 646 | !!---------------------------------------------------------------------- |
|---|
| 647 | !! OPA8.5, LODYC-IPSL (2002) |
|---|
| 648 | !!---------------------------------------------------------------------- |
|---|
| 649 | |
|---|
| 650 | ! pn2 : first and last levels |
|---|
| 651 | ! --------------------------- |
|---|
| 652 | ! bn^2=0. at jk=1 and jpk set in inidtr.F : no computation |
|---|
| 653 | |
|---|
| 654 | |
|---|
| 655 | ! pn2 : interior points only (2=< jk =< jpkm1 ) |
|---|
| 656 | ! -------------------------- |
|---|
| 657 | |
|---|
| 658 | SELECT CASE ( neos ) |
|---|
| 659 | |
|---|
| 660 | CASE ( 0 ) ! Jackett and McDougall (1994) formulation |
|---|
| 661 | |
|---|
| 662 | ! ! =============== |
|---|
| 663 | DO jk = 2, jpkm1 ! Horizontal slab |
|---|
| 664 | ! ! =============== |
|---|
| 665 | DO jj = 1, jpj |
|---|
| 666 | DO ji = 1, jpi |
|---|
| 667 | zgde3w = grav / fse3w(ji,jj,jk) |
|---|
| 668 | zt = 0.5 * ( ptem(ji,jj,jk) + ptem(ji,jj,jk-1) ) ! potential temperature at w-point |
|---|
| 669 | zs = 0.5 * ( psal(ji,jj,jk) + psal(ji,jj,jk-1) ) - 35.0 ! salinity anomaly (s-35) at w-point |
|---|
| 670 | zh = fsdepw(ji,jj,jk) ! depth in meters at w-point |
|---|
| 671 | |
|---|
| 672 | zalbet = ( ( ( - 0.255019e-07 * zt + 0.298357e-05 ) * zt & ! ratio alpha/beta |
|---|
| 673 | & - 0.203814e-03 ) * zt & |
|---|
| 674 | & + 0.170907e-01 ) * zt & |
|---|
| 675 | & + 0.665157e-01 & |
|---|
| 676 | & + ( - 0.678662e-05 * zs & |
|---|
| 677 | & - 0.846960e-04 * zt + 0.378110e-02 ) * zs & |
|---|
| 678 | & + ( ( - 0.302285e-13 * zh & |
|---|
| 679 | & - 0.251520e-11 * zs & |
|---|
| 680 | & + 0.512857e-12 * zt * zt ) * zh & |
|---|
| 681 | & - 0.164759e-06 * zs & |
|---|
| 682 | & +( 0.791325e-08 * zt - 0.933746e-06 ) * zt & |
|---|
| 683 | & + 0.380374e-04 ) * zh |
|---|
| 684 | |
|---|
| 685 | zbeta = ( ( -0.415613e-09 * zt + 0.555579e-07 ) * zt & ! beta |
|---|
| 686 | & - 0.301985e-05 ) * zt & |
|---|
| 687 | & + 0.785567e-03 & |
|---|
| 688 | & + ( 0.515032e-08 * zs & |
|---|
| 689 | & + 0.788212e-08 * zt - 0.356603e-06 ) * zs & |
|---|
| 690 | & +( ( 0.121551e-17 * zh & |
|---|
| 691 | & - 0.602281e-15 * zs & |
|---|
| 692 | & - 0.175379e-14 * zt + 0.176621e-12 ) * zh & |
|---|
| 693 | & + 0.408195e-10 * zs & |
|---|
| 694 | & + ( - 0.213127e-11 * zt + 0.192867e-09 ) * zt & |
|---|
| 695 | & - 0.121555e-07 ) * zh |
|---|
| 696 | |
|---|
| 697 | pn2(ji,jj,jk) = zgde3w * zbeta * tmask(ji,jj,jk) & ! N^2 |
|---|
| 698 | & * ( zalbet * ( ptem(ji,jj,jk-1) - ptem(ji,jj,jk) ) & |
|---|
| 699 | & - ( psal(ji,jj,jk-1) - psal(ji,jj,jk) ) ) |
|---|
| 700 | #if defined key_zdfddm |
|---|
| 701 | ! !!bug **** caution a traiter zds=dk[S]= 0 !!!! |
|---|
| 702 | zds = ( psal(ji,jj,jk-1) - psal(ji,jj,jk) ) ! Rrau = (alpha / beta) (dk[t] / dk[s]) |
|---|
| 703 | IF ( ABS( zds) <= 1.e-20 ) zds = 1.e-20 |
|---|
| 704 | rrau(ji,jj,jk) = zalbet * ( ptem(ji,jj,jk-1) - ptem(ji,jj,jk) ) / zds |
|---|
| 705 | #endif |
|---|
| 706 | END DO |
|---|
| 707 | END DO |
|---|
| 708 | ! ! =============== |
|---|
| 709 | END DO ! End of slab |
|---|
| 710 | ! ! =============== |
|---|
| 711 | |
|---|
| 712 | |
|---|
| 713 | CASE ( 1 ) ! Linear formulation function of temperature only |
|---|
| 714 | |
|---|
| 715 | ! ! =============== |
|---|
| 716 | DO jk = 2, jpkm1 ! Horizontal slab |
|---|
| 717 | ! ! =============== |
|---|
| 718 | DO jj = 1, jpj |
|---|
| 719 | DO ji = 1, jpi |
|---|
| 720 | zgde3w = grav / fse3w(ji,jj,jk) * tmask(ji,jj,jk) |
|---|
| 721 | pn2(ji,jj,jk) = zgde3w * ralpha * ( ptem(ji,jj,jk-1) - ptem(ji,jj,jk) ) |
|---|
| 722 | END DO |
|---|
| 723 | END DO |
|---|
| 724 | ! ! =============== |
|---|
| 725 | END DO ! End of slab |
|---|
| 726 | ! ! =============== |
|---|
| 727 | |
|---|
| 728 | |
|---|
| 729 | CASE ( 2 ) ! Linear formulation function of temperature and salinity |
|---|
| 730 | |
|---|
| 731 | ! ! =============== |
|---|
| 732 | DO jk = 2, jpkm1 ! Horizontal slab |
|---|
| 733 | ! ! =============== |
|---|
| 734 | DO jj = 1, jpj |
|---|
| 735 | DO ji = 1, jpi |
|---|
| 736 | zgde3w = grav / fse3w(ji,jj,jk) * tmask(ji,jj,jk) |
|---|
| 737 | pn2(ji,jj,jk) = zgde3w * ( ralpha * ( ptem(ji,jj,jk-1) - ptem(ji,jj,jk) ) & |
|---|
| 738 | & - rbeta * ( psal(ji,jj,jk-1) - psal(ji,jj,jk) ) ) |
|---|
| 739 | END DO |
|---|
| 740 | END DO |
|---|
| 741 | #if defined key_zdfddm |
|---|
| 742 | ! ! Rrau = (alpha / beta) (dk[t] / dk[s]) |
|---|
| 743 | zalbet = ralpha / rbeta |
|---|
| 744 | DO jj = 1, jpj |
|---|
| 745 | DO ji = 1, jpi |
|---|
| 746 | zds = ( psal(ji,jj,jk-1) - psal(ji,jj,jk) ) |
|---|
| 747 | IF ( ABS( zds ) <= 1.e-20 ) zds = 1.e-20 |
|---|
| 748 | rrau(ji,jj,jk) = zalbet * ( ptem(ji,jj,jk-1) - ptem(ji,jj,jk) ) / zds |
|---|
| 749 | END DO |
|---|
| 750 | END DO |
|---|
| 751 | #endif |
|---|
| 752 | ! ! =============== |
|---|
| 753 | END DO ! End of slab |
|---|
| 754 | ! ! =============== |
|---|
| 755 | |
|---|
| 756 | CASE DEFAULT |
|---|
| 757 | |
|---|
| 758 | IF(lwp) WRITE(numout,cform_err) |
|---|
| 759 | IF(lwp) WRITE(numout,*) ' bad flag value for neos = ', neos |
|---|
| 760 | nstop = nstop + 1 |
|---|
| 761 | |
|---|
| 762 | END SELECT |
|---|
| 763 | |
|---|
| 764 | IF(l_ctl) WRITE(numout,*) ' bn2 : ', SUM( pn2 (1:nictl+1,1:njctl+1,:) ) |
|---|
| 765 | #if defined key_zdfddm |
|---|
| 766 | IF(l_ctl) WRITE(numout,*) ' rrau : ', SUM( rrau(1:nictl+1,1:njctl+1,:) ) |
|---|
| 767 | #endif |
|---|
| 768 | |
|---|
| 769 | END SUBROUTINE eos_bn2 |
|---|
| 770 | |
|---|
| 771 | |
|---|
| 772 | SUBROUTINE eos_init |
|---|
| 773 | !!---------------------------------------------------------------------- |
|---|
| 774 | !! *** ROUTINE eos_init *** |
|---|
| 775 | !! |
|---|
| 776 | !! ** Purpose : initializations for the equation of state |
|---|
| 777 | !! |
|---|
| 778 | !! ** Method : Read the namelist nameos |
|---|
| 779 | !! |
|---|
| 780 | !! ** Action : blahblah.... |
|---|
| 781 | !! |
|---|
| 782 | !! History : |
|---|
| 783 | !! 8.5 ! 02-10 (G. Madec) Original code |
|---|
| 784 | !!---------------------------------------------------------------------- |
|---|
| 785 | NAMELIST/nameos/ neos, ralpha, rbeta |
|---|
| 786 | !!---------------------------------------------------------------------- |
|---|
| 787 | !! OPA 8.5, LODYC-IPSL (2002) |
|---|
| 788 | !!---------------------------------------------------------------------- |
|---|
| 789 | |
|---|
| 790 | ! set the initialization flag to 1 |
|---|
| 791 | neos_init = 1 ! indicate that the initialization has been done |
|---|
| 792 | |
|---|
| 793 | ! namelist nameos : ocean physical parameters |
|---|
| 794 | |
|---|
| 795 | ! Read Namelist nameos : equation of state |
|---|
| 796 | REWIND( numnam ) |
|---|
| 797 | READ ( numnam, nameos ) |
|---|
| 798 | |
|---|
| 799 | ! Control print |
|---|
| 800 | IF(lwp) THEN |
|---|
| 801 | WRITE(numout,*) |
|---|
| 802 | WRITE(numout,*) 'eos_init : equation of state' |
|---|
| 803 | WRITE(numout,*) '~~~~~~~~' |
|---|
| 804 | WRITE(numout,*) ' Namelist nameos : set eos parameters' |
|---|
| 805 | WRITE(numout,*) |
|---|
| 806 | WRITE(numout,*) ' flag for eq. of state and N^2 neos = ', neos |
|---|
| 807 | WRITE(numout,*) ' thermal exp. coef. (linear) ralpha = ', ralpha |
|---|
| 808 | WRITE(numout,*) ' saline exp. coef. (linear) rbeta = ', rbeta |
|---|
| 809 | WRITE(numout,*) |
|---|
| 810 | ENDIF |
|---|
| 811 | |
|---|
| 812 | SELECT CASE ( neos ) |
|---|
| 813 | |
|---|
| 814 | CASE ( 0 ) ! Jackett and McDougall (1994) formulation |
|---|
| 815 | |
|---|
| 816 | IF(lwp) WRITE(numout,*) ' use of Jackett & McDougall (1994) equation of state and' |
|---|
| 817 | IF(lwp) WRITE(numout,*) ' McDougall (1987) Brunt-Vaisala frequency' |
|---|
| 818 | |
|---|
| 819 | CASE ( 1 ) ! Linear formulation function of temperature only |
|---|
| 820 | |
|---|
| 821 | IF(lwp) WRITE(numout,*) ' use of linear eos rho(T) = rau0 * ( 1.0285 - ralpha * T )' |
|---|
| 822 | IF( lk_zdfddm ) THEN |
|---|
| 823 | IF(lwp) WRITE(numout,cform_err) |
|---|
| 824 | IF(lwp) WRITE(numout,*) ' double diffusive mixing parameterization requires', & |
|---|
| 825 | ' that T and S are used as state variables' |
|---|
| 826 | nstop = nstop + 1 |
|---|
| 827 | ENDIF |
|---|
| 828 | |
|---|
| 829 | CASE ( 2 ) ! Linear formulation function of temperature and salinity |
|---|
| 830 | |
|---|
| 831 | IF(lwp) WRITE(numout,*) ' use of linear eos rho(T,S) = rau0 * ( rbeta * S - ralpha * T )' |
|---|
| 832 | |
|---|
| 833 | CASE DEFAULT |
|---|
| 834 | |
|---|
| 835 | IF(lwp) WRITE(numout,cform_err) |
|---|
| 836 | IF(lwp) WRITE(numout,*) ' bad flag value for neos = ', neos |
|---|
| 837 | nstop = nstop + 1 |
|---|
| 838 | |
|---|
| 839 | END SELECT |
|---|
| 840 | |
|---|
| 841 | END SUBROUTINE eos_init |
|---|
| 842 | |
|---|
| 843 | !!====================================================================== |
|---|
| 844 | END MODULE eosbn2 |
|---|
