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 | !! History : OPA ! 1989-03 (O. Marti) Original code |
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8 | !! 6.0 ! 1994-07 (G. Madec, M. Imbard) add bn2 |
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9 | !! 6.0 ! 1994-08 (G. Madec) Add Jackett & McDougall eos |
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10 | !! 7.0 ! 1996-01 (G. Madec) statement function for e3 |
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11 | !! 8.1 ! 1997-07 (G. Madec) density instead of volumic mass |
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12 | !! - ! 1999-02 (G. Madec, N. Grima) semi-implicit pressure gradient |
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13 | !! 8.2 ! 2001-09 (M. Ben Jelloul) bugfix on linear eos |
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14 | !! NEMO 1.0 ! 2002-10 (G. Madec) add eos_init |
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15 | !! - ! 2002-11 (G. Madec, A. Bozec) partial step, eos_insitu_2d |
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16 | !! - ! 2003-08 (G. Madec) F90, free form |
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17 | !! 3.0 ! 2006-08 (G. Madec) add tfreez function |
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18 | !! 3.3 ! 2010-05 (C. Ethe, G. Madec) merge TRC-TRA |
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19 | !! - ! 2010-10 (G. Nurser, G. Madec) add eos_alpbet used in ldfslp |
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20 | !!---------------------------------------------------------------------- |
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21 | |
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22 | !!---------------------------------------------------------------------- |
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23 | !! eos : generic interface of the equation of state |
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24 | !! eos_insitu : Compute the in situ density |
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25 | !! eos_insitu_pot : Compute the insitu and surface referenced potential |
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26 | !! volumic mass |
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27 | !! eos_insitu_2d : Compute the in situ density for 2d fields |
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28 | !! eos_bn2 : Compute the Brunt-Vaisala frequency |
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29 | !! eos_alpbet : calculates the in situ thermal and haline expansion coeff. |
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30 | !! tfreez : Compute the surface freezing temperature |
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31 | !! eos_init : set eos parameters (namelist) |
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32 | !!---------------------------------------------------------------------- |
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33 | USE dom_oce ! ocean space and time domain |
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34 | USE phycst ! physical constants |
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35 | USE zdfddm ! vertical physics: double diffusion |
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36 | USE in_out_manager ! I/O manager |
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37 | USE lib_mpp ! MPP library |
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38 | USE prtctl ! Print control |
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39 | |
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40 | IMPLICIT NONE |
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41 | PRIVATE |
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42 | |
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43 | ! !! * Interface |
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44 | INTERFACE eos |
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45 | MODULE PROCEDURE eos_insitu, eos_insitu_pot, eos_insitu_2d |
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46 | END INTERFACE |
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47 | INTERFACE bn2 |
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48 | MODULE PROCEDURE eos_bn2 |
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49 | END INTERFACE |
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50 | |
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51 | PUBLIC eos ! called by step, istate, tranpc and zpsgrd modules |
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52 | PUBLIC eos_init ! called by istate module |
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53 | PUBLIC bn2 ! called by step module |
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54 | PUBLIC eos_alpbet ! called by ldfslp module |
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55 | PUBLIC tfreez ! called by sbcice_... modules |
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56 | |
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57 | ! !!* Namelist (nameos) * |
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58 | INTEGER , PUBLIC :: nn_eos = 0 !: = 0/1/2 type of eq. of state and Brunt-Vaisala frequ. |
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59 | REAL(wp), PUBLIC :: rn_alpha = 2.0e-4_wp !: thermal expension coeff. (linear equation of state) |
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60 | REAL(wp), PUBLIC :: rn_beta = 7.7e-4_wp !: saline expension coeff. (linear equation of state) |
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61 | |
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62 | REAL(wp), PUBLIC :: ralpbet !: alpha / beta ratio |
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63 | |
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64 | !! * Control permutation of array indices |
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65 | # include "dom_oce_ftrans.h90" |
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66 | # include "zdfddm_ftrans.h90" |
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67 | |
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68 | !! * Substitutions |
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69 | # include "domzgr_substitute.h90" |
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70 | # include "vectopt_loop_substitute.h90" |
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71 | !!---------------------------------------------------------------------- |
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72 | !! NEMO/OPA 3.3 , NEMO Consortium (2010) |
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73 | !! $Id$ |
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74 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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75 | !!---------------------------------------------------------------------- |
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76 | CONTAINS |
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77 | |
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78 | SUBROUTINE eos_insitu( pts, prd ) |
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79 | !!---------------------------------------------------------------------- |
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80 | !! *** ROUTINE eos_insitu *** |
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81 | !! |
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82 | !! ** Purpose : Compute the in situ density (ratio rho/rau0) from |
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83 | !! potential temperature and salinity using an equation of state |
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84 | !! defined through the namelist parameter nn_eos. |
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85 | !! |
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86 | !! ** Method : 3 cases: |
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87 | !! nn_eos = 0 : Jackett and McDougall (1994) equation of state. |
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88 | !! the in situ density is computed directly as a function of |
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89 | !! potential temperature relative to the surface (the opa t |
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90 | !! variable), salt and pressure (assuming no pressure variation |
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91 | !! along geopotential surfaces, i.e. the pressure p in decibars |
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92 | !! is approximated by the depth in meters. |
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93 | !! prd(t,s,p) = ( rho(t,s,p) - rau0 ) / rau0 |
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94 | !! with pressure p decibars |
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95 | !! potential temperature t deg celsius |
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96 | !! salinity s psu |
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97 | !! reference volumic mass rau0 kg/m**3 |
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98 | !! in situ volumic mass rho kg/m**3 |
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99 | !! in situ density anomalie prd no units |
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100 | !! Check value: rho = 1060.93298 kg/m**3 for p=10000 dbar, |
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101 | !! t = 40 deg celcius, s=40 psu |
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102 | !! nn_eos = 1 : linear equation of state function of temperature only |
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103 | !! prd(t) = 0.0285 - rn_alpha * t |
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104 | !! nn_eos = 2 : linear equation of state function of temperature and |
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105 | !! salinity |
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106 | !! prd(t,s) = rn_beta * s - rn_alpha * tn - 1. |
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107 | !! Note that no boundary condition problem occurs in this routine |
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108 | !! as pts are defined over the whole domain. |
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109 | !! |
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110 | !! ** Action : compute prd , the in situ density (no units) |
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111 | !! |
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112 | !! References : Jackett and McDougall, J. Atmos. Ocean. Tech., 1994 |
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113 | !!---------------------------------------------------------------------- |
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114 | USE wrk_nemo, ONLY: wrk_in_use, wrk_not_released |
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115 | USE wrk_nemo, ONLY: zws => wrk_3d_1 ! 3D workspace |
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116 | !! |
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117 | |
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118 | !FTRANS zws :I :I :z |
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119 | !FTRANS pts :I :I :z :I |
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120 | !FTRANS prd :I :I :z |
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121 | |
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122 | REAL(wp), DIMENSION(:,:,:,:), INTENT(in ) :: pts ! 1 : potential temperature [Celcius] |
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123 | ! ! 2 : salinity [psu] |
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124 | REAL(wp), DIMENSION(:,:,:) , INTENT( out) :: prd ! in situ density [-] |
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125 | !! |
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126 | INTEGER :: ji, jj, jk ! dummy loop indices |
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127 | REAL(wp) :: zt , zs , zh , zsr ! local scalars |
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128 | REAL(wp) :: zr1, zr2, zr3, zr4 ! - - |
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129 | REAL(wp) :: zrhop, ze, zbw, zb ! - - |
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130 | REAL(wp) :: zd , zc , zaw, za ! - - |
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131 | REAL(wp) :: zb1, za1, zkw, zk0 ! - - |
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132 | REAL(wp) :: zrau0r ! - - |
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133 | !!---------------------------------------------------------------------- |
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134 | |
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135 | IF( wrk_in_use(3, 1) ) THEN |
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136 | CALL ctl_stop('eos_insitu: requested workspace array unavailable') ; RETURN |
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137 | ENDIF |
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138 | |
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139 | SELECT CASE( nn_eos ) |
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140 | ! |
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141 | CASE( 0 ) !== Jackett and McDougall (1994) formulation ==! |
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142 | zrau0r = 1.e0 / rau0 |
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143 | !CDIR NOVERRCHK |
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144 | zws(:,:,:) = SQRT( ABS( pts(:,:,:,jp_sal) ) ) |
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145 | ! |
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146 | #if defined key_z_first |
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147 | DO jj = 1, jpj |
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148 | DO ji = 1, jpi |
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149 | DO jk = 1, jpkm1 |
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150 | #else |
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151 | DO jk = 1, jpkm1 |
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152 | DO jj = 1, jpj |
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153 | DO ji = 1, jpi |
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154 | #endif |
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155 | zt = pts (ji,jj,jk,jp_tem) |
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156 | zs = pts (ji,jj,jk,jp_sal) |
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157 | zh = fsdept(ji,jj,jk) ! depth |
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158 | zsr= zws (ji,jj,jk) ! square root salinity |
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159 | ! |
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160 | ! compute volumic mass pure water at atm pressure |
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161 | zr1= ( ( ( ( 6.536332e-9_wp *zt - 1.120083e-6_wp )*zt + 1.001685e-4_wp )*zt & |
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162 | & -9.095290e-3_wp )*zt + 6.793952e-2_wp )*zt + 999.842594_wp |
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163 | ! seawater volumic mass atm pressure |
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164 | zr2= ( ( ( 5.3875e-9_wp*zt-8.2467e-7_wp ) *zt+7.6438e-5_wp ) *zt & |
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165 | & -4.0899e-3_wp ) *zt+0.824493_wp |
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166 | zr3= ( -1.6546e-6_wp*zt+1.0227e-4_wp ) *zt-5.72466e-3_wp |
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167 | zr4= 4.8314e-4_wp |
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168 | ! |
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169 | ! potential volumic mass (reference to the surface) |
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170 | zrhop= ( zr4*zs + zr3*zsr + zr2 ) *zs + zr1 |
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171 | ! |
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172 | ! add the compression terms |
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173 | ze = ( -3.508914e-8_wp*zt-1.248266e-8_wp ) *zt-2.595994e-6_wp |
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174 | zbw= ( 1.296821e-6_wp*zt-5.782165e-9_wp ) *zt+1.045941e-4_wp |
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175 | zb = zbw + ze * zs |
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176 | ! |
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177 | zd = -2.042967e-2_wp |
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178 | zc = (-7.267926e-5_wp*zt+2.598241e-3_wp ) *zt+0.1571896_wp |
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179 | zaw= ( ( 5.939910e-6_wp*zt+2.512549e-3_wp ) *zt-0.1028859_wp ) *zt - 4.721788_wp |
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180 | za = ( zd*zsr + zc ) *zs + zaw |
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181 | ! |
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182 | zb1= (-0.1909078_wp*zt+7.390729_wp ) *zt-55.87545_wp |
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183 | za1= ( ( 2.326469e-3_wp*zt+1.553190_wp) *zt-65.00517_wp ) *zt+1044.077_wp |
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184 | zkw= ( ( (-1.361629e-4_wp*zt-1.852732e-2_wp ) *zt-30.41638_wp ) *zt + 2098.925_wp ) *zt+190925.6_wp |
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185 | zk0= ( zb1*zsr + za1 )*zs + zkw |
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186 | ! |
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187 | ! masked in situ density anomaly |
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188 | prd(ji,jj,jk) = ( zrhop / ( 1.0_wp - zh / ( zk0 - zh * ( za - zh * zb ) ) ) & |
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189 | & - rau0 ) * zrau0r * tmask(ji,jj,jk) |
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190 | END DO |
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191 | END DO |
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192 | END DO |
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193 | ! |
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194 | CASE( 1 ) !== Linear formulation function of temperature only ==! |
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195 | #if defined key_z_first |
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196 | DO jj = 1, jpj |
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197 | DO ji = 1, jpi |
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198 | DO jk = 1, jpkm1 |
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199 | prd(ji,jj,jk) = ( 0.0285_wp - rn_alpha * pts(ji,jj,jk,jp_tem) ) * tmask(ji,jj,jk) |
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200 | END DO |
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201 | END DO |
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202 | END DO |
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203 | #else |
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204 | DO jk = 1, jpkm1 |
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205 | prd(:,:,jk) = ( 0.0285_wp - rn_alpha * pts(:,:,jk,jp_tem) ) * tmask(:,:,jk) |
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206 | END DO |
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207 | #endif |
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208 | ! |
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209 | CASE( 2 ) !== Linear formulation function of temperature and salinity ==! |
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210 | #if defined key_z_first |
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211 | DO jj = 1, jpj |
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212 | DO ji = 1, jpi |
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213 | DO jk = 1, jpkm1 |
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214 | prd(ji,jj,jk) = ( rn_beta * pts(ji,jj,jk,jp_sal) - rn_alpha * pts(ji,jj,jk,jp_tem) ) * tmask(ji,jj,jk) |
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215 | END DO |
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216 | END DO |
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217 | END DO |
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218 | #else |
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219 | DO jk = 1, jpkm1 |
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220 | prd(:,:,jk) = ( rn_beta * pts(:,:,jk,jp_sal) - rn_alpha * pts(:,:,jk,jp_tem) ) * tmask(:,:,jk) |
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221 | END DO |
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222 | #endif |
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223 | ! |
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224 | END SELECT |
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225 | ! |
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226 | IF(ln_ctl) CALL prt_ctl( tab3d_1=prd, clinfo1=' eos : ', ovlap=1, kdim=jpk ) |
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227 | ! |
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228 | IF( wrk_not_released(3, 1) ) CALL ctl_stop('eos_insitu: failed to release workspace array') |
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229 | ! |
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230 | |
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231 | !! * Reset control of array index permutation |
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232 | !FTRANS CLEAR |
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233 | # include "dom_oce_ftrans.h90" |
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234 | # include "zdfddm_ftrans.h90" |
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235 | |
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236 | END SUBROUTINE eos_insitu |
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237 | |
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238 | |
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239 | SUBROUTINE eos_insitu_pot( pts, prd, prhop ) |
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240 | !!---------------------------------------------------------------------- |
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241 | !! *** ROUTINE eos_insitu_pot *** |
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242 | !! |
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243 | !! ** Purpose : Compute the in situ density (ratio rho/rau0) and the |
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244 | !! potential volumic mass (Kg/m3) from potential temperature and |
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245 | !! salinity fields using an equation of state defined through the |
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246 | !! namelist parameter nn_eos. |
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247 | !! |
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248 | !! ** Method : |
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249 | !! nn_eos = 0 : Jackett and McDougall (1994) equation of state. |
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250 | !! the in situ density is computed directly as a function of |
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251 | !! potential temperature relative to the surface (the opa t |
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252 | !! variable), salt and pressure (assuming no pressure variation |
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253 | !! along geopotential surfaces, i.e. the pressure p in decibars |
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254 | !! is approximated by the depth in meters. |
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255 | !! prd(t,s,p) = ( rho(t,s,p) - rau0 ) / rau0 |
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256 | !! rhop(t,s) = rho(t,s,0) |
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257 | !! with pressure p decibars |
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258 | !! potential temperature t deg celsius |
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259 | !! salinity s psu |
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260 | !! reference volumic mass rau0 kg/m**3 |
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261 | !! in situ volumic mass rho kg/m**3 |
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262 | !! in situ density anomalie prd no units |
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263 | !! |
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264 | !! Check value: rho = 1060.93298 kg/m**3 for p=10000 dbar, |
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265 | !! t = 40 deg celcius, s=40 psu |
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266 | !! |
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267 | !! nn_eos = 1 : linear equation of state function of temperature only |
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268 | !! prd(t) = ( rho(t) - rau0 ) / rau0 = 0.028 - rn_alpha * t |
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269 | !! rhop(t,s) = rho(t,s) |
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270 | !! |
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271 | !! nn_eos = 2 : linear equation of state function of temperature and |
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272 | !! salinity |
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273 | !! prd(t,s) = ( rho(t,s) - rau0 ) / rau0 |
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274 | !! = rn_beta * s - rn_alpha * tn - 1. |
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275 | !! rhop(t,s) = rho(t,s) |
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276 | !! Note that no boundary condition problem occurs in this routine |
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277 | !! as (tn,sn) or (ta,sa) are defined over the whole domain. |
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278 | !! |
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279 | !! ** Action : - prd , the in situ density (no units) |
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280 | !! - prhop, the potential volumic mass (Kg/m3) |
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281 | !! |
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282 | !! References : Jackett and McDougall, J. Atmos. Ocean. Tech., 1994 |
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283 | !! Brown and Campana, Mon. Weather Rev., 1978 |
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284 | !!---------------------------------------------------------------------- |
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285 | USE wrk_nemo, ONLY: wrk_in_use, wrk_not_released |
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286 | USE wrk_nemo, ONLY: zws => wrk_3d_1 ! 3D workspace |
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287 | !! |
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288 | |
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289 | !FTRANS zws :I :I :z |
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290 | !FTRANS pts :I :I :z :I |
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291 | !FTRANS prd :I :I :z |
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292 | !FTRANS prhop :I :I :z |
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293 | |
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294 | !!DCSE NEMO: This style defeats ftrans |
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295 | ! REAL(wp), DIMENSION(jpi,jpj,jpk,jpts), INTENT(in ) :: pts ! 1 : potential temperature [Celcius] |
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296 | ! ! ! 2 : salinity [psu] |
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297 | ! REAL(wp), DIMENSION(jpi,jpj,jpk ), INTENT( out) :: prd ! in situ density [-] |
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298 | ! REAL(wp), DIMENSION(jpi,jpj,jpk ), INTENT( out) :: prhop ! potential density (surface referenced) |
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299 | REAL(wp), INTENT(in ) :: pts(jpi,jpj,jpk,jpts) ! 1 : potential temperature [Celcius] |
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300 | ! ! 2 : salinity [psu] |
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301 | REAL(wp), INTENT( out) :: prd(jpi,jpj,jpk) ! in situ density [-] |
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302 | REAL(wp), INTENT( out) :: prhop(jpi,jpj,jpk) ! potential density (surface referenced) |
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303 | ! |
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304 | INTEGER :: ji, jj, jk ! dummy loop indices |
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305 | REAL(wp) :: zt, zs, zh, zsr, zr1, zr2, zr3, zr4, zrhop, ze, zbw ! local scalars |
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306 | REAL(wp) :: zb, zd, zc, zaw, za, zb1, za1, zkw, zk0, zrau0r ! - - |
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307 | !!---------------------------------------------------------------------- |
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308 | |
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309 | IF( wrk_in_use(3, 1) ) THEN |
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310 | CALL ctl_stop('eos_insitu_pot: requested workspace array unavailable') ; RETURN |
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311 | ENDIF |
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312 | |
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313 | SELECT CASE ( nn_eos ) |
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314 | ! |
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315 | CASE( 0 ) !== Jackett and McDougall (1994) formulation ==! |
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316 | zrau0r = 1.e0 / rau0 |
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317 | !CDIR NOVERRCHK |
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318 | zws(:,:,:) = SQRT( ABS( pts(:,:,:,jp_sal) ) ) |
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319 | ! |
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320 | #if defined key_z_first |
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321 | DO jj = 1, jpj |
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322 | DO ji = 1, jpi |
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323 | DO jk = 1, jpkm1 |
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324 | #else |
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325 | DO jk = 1, jpkm1 |
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326 | DO jj = 1, jpj |
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327 | DO ji = 1, jpi |
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328 | #endif |
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329 | zt = pts (ji,jj,jk,jp_tem) |
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330 | zs = pts (ji,jj,jk,jp_sal) |
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331 | zh = fsdept(ji,jj,jk) ! depth |
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332 | zsr= zws (ji,jj,jk) ! square root salinity |
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333 | ! |
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334 | ! compute volumic mass pure water at atm pressure |
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335 | zr1= ( ( ( ( 6.536332e-9_wp*zt-1.120083e-6_wp )*zt+1.001685e-4_wp )*zt & |
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336 | & -9.095290e-3_wp )*zt+6.793952e-2_wp )*zt+999.842594_wp |
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337 | ! seawater volumic mass atm pressure |
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338 | zr2= ( ( ( 5.3875e-9_wp*zt-8.2467e-7_wp ) *zt+7.6438e-5_wp ) *zt & |
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339 | & -4.0899e-3_wp ) *zt+0.824493_wp |
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340 | zr3= ( -1.6546e-6_wp*zt+1.0227e-4_wp ) *zt-5.72466e-3_wp |
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341 | zr4= 4.8314e-4_wp |
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342 | ! |
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343 | ! potential volumic mass (reference to the surface) |
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344 | zrhop= ( zr4*zs + zr3*zsr + zr2 ) *zs + zr1 |
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345 | ! |
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346 | ! save potential volumic mass |
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347 | prhop(ji,jj,jk) = zrhop * tmask(ji,jj,jk) |
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348 | ! |
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349 | ! add the compression terms |
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350 | ze = ( -3.508914e-8_wp*zt-1.248266e-8_wp ) *zt-2.595994e-6_wp |
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351 | zbw= ( 1.296821e-6_wp*zt-5.782165e-9_wp ) *zt+1.045941e-4_wp |
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352 | zb = zbw + ze * zs |
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353 | ! |
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354 | zd = -2.042967e-2_wp |
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355 | zc = (-7.267926e-5_wp*zt+2.598241e-3_wp ) *zt+0.1571896_wp |
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356 | zaw= ( ( 5.939910e-6_wp*zt+2.512549e-3_wp ) *zt-0.1028859_wp ) *zt - 4.721788_wp |
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357 | za = ( zd*zsr + zc ) *zs + zaw |
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358 | ! |
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359 | zb1= ( -0.1909078_wp *zt+7.390729_wp ) *zt-55.87545_wp |
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360 | za1= ( ( 2.326469e-3_wp*zt+1.553190_wp ) *zt-65.00517_wp ) *zt + 1044.077_wp |
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361 | zkw= ( ( (-1.361629e-4_wp*zt-1.852732e-2_wp ) *zt-30.41638_wp ) *zt + 2098.925_wp ) *zt+190925.6_wp |
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362 | zk0= ( zb1*zsr + za1 )*zs + zkw |
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363 | ! |
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364 | ! masked in situ density anomaly |
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365 | prd(ji,jj,jk) = ( zrhop / ( 1.0_wp - zh / ( zk0 - zh * ( za - zh * zb ) ) ) & |
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366 | & - rau0 ) * zrau0r * tmask(ji,jj,jk) |
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367 | END DO |
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368 | END DO |
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369 | END DO |
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370 | ! |
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371 | CASE( 1 ) !== Linear formulation = F( temperature ) ==! |
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372 | #if defined key_z_first |
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373 | DO jj = 1, jpj |
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374 | DO ji = 1, jpi |
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375 | DO jk = 1, jpkm1 |
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376 | prd (ji,jj,jk) = ( 0.0285_wp - rn_alpha * pts(ji,jj,jk,jp_tem) ) * tmask(ji,jj,jk) |
---|
377 | prhop(ji,jj,jk) = ( 1.e0_wp + prd(ji,jj,jk) ) * rau0 * tmask(ji,jj,jk) |
---|
378 | END DO |
---|
379 | END DO |
---|
380 | END DO |
---|
381 | #else |
---|
382 | DO jk = 1, jpkm1 |
---|
383 | prd (:,:,jk) = ( 0.0285_wp - rn_alpha * pts(:,:,jk,jp_tem) ) * tmask(:,:,jk) |
---|
384 | prhop(:,:,jk) = ( 1.e0_wp + prd (:,:,jk) ) * rau0 * tmask(:,:,jk) |
---|
385 | END DO |
---|
386 | #endif |
---|
387 | ! |
---|
388 | CASE( 2 ) !== Linear formulation = F( temperature , salinity ) ==! |
---|
389 | #if defined key_z_first |
---|
390 | DO jj = 1, jpj |
---|
391 | DO ji = 1, jpi |
---|
392 | DO jk = 1, jpkm1 |
---|
393 | prd (ji,jj,jk) = ( rn_beta * pts(ji,jj,jk,jp_sal) - rn_alpha * pts(ji,jj,jk,jp_tem) ) * tmask(ji,jj,jk) |
---|
394 | prhop(ji,jj,jk) = ( 1.e0_wp + prd(ji,jj,jk) ) * rau0 * tmask(ji,jj,jk) |
---|
395 | END DO |
---|
396 | END DO |
---|
397 | END DO |
---|
398 | #else |
---|
399 | DO jk = 1, jpkm1 |
---|
400 | prd (:,:,jk) = ( rn_beta * pts(:,:,jk,jp_sal) - rn_alpha * pts(:,:,jk,jp_tem) ) * tmask(:,:,jk) |
---|
401 | prhop(:,:,jk) = ( 1.e0_wp + prd (:,:,jk) ) * rau0 * tmask(:,:,jk) |
---|
402 | END DO |
---|
403 | #endif |
---|
404 | ! |
---|
405 | END SELECT |
---|
406 | ! |
---|
407 | IF(ln_ctl) CALL prt_ctl( tab3d_1=prd, clinfo1=' eos-p: ', tab3d_2=prhop, clinfo2=' pot : ', ovlap=1, kdim=jpk ) |
---|
408 | ! |
---|
409 | IF( wrk_not_released(3, 1) ) CALL ctl_stop('eos_insitu_pot: failed to release workspace array') |
---|
410 | ! |
---|
411 | |
---|
412 | !! * Reset control of array index permutation |
---|
413 | !FTRANS CLEAR |
---|
414 | # include "dom_oce_ftrans.h90" |
---|
415 | # include "zdfddm_ftrans.h90" |
---|
416 | |
---|
417 | END SUBROUTINE eos_insitu_pot |
---|
418 | |
---|
419 | |
---|
420 | SUBROUTINE eos_insitu_2d( pts, pdep, prd ) |
---|
421 | !!---------------------------------------------------------------------- |
---|
422 | !! *** ROUTINE eos_insitu_2d *** |
---|
423 | !! |
---|
424 | !! ** Purpose : Compute the in situ density (ratio rho/rau0) from |
---|
425 | !! potential temperature and salinity using an equation of state |
---|
426 | !! defined through the namelist parameter nn_eos. * 2D field case |
---|
427 | !! |
---|
428 | !! ** Method : |
---|
429 | !! nn_eos = 0 : Jackett and McDougall (1994) equation of state. |
---|
430 | !! the in situ density is computed directly as a function of |
---|
431 | !! potential temperature relative to the surface (the opa t |
---|
432 | !! variable), salt and pressure (assuming no pressure variation |
---|
433 | !! along geopotential surfaces, i.e. the pressure p in decibars |
---|
434 | !! is approximated by the depth in meters. |
---|
435 | !! prd(t,s,p) = ( rho(t,s,p) - rau0 ) / rau0 |
---|
436 | !! with pressure p decibars |
---|
437 | !! potential temperature t deg celsius |
---|
438 | !! salinity s psu |
---|
439 | !! reference volumic mass rau0 kg/m**3 |
---|
440 | !! in situ volumic mass rho kg/m**3 |
---|
441 | !! in situ density anomalie prd no units |
---|
442 | !! Check value: rho = 1060.93298 kg/m**3 for p=10000 dbar, |
---|
443 | !! t = 40 deg celcius, s=40 psu |
---|
444 | !! nn_eos = 1 : linear equation of state function of temperature only |
---|
445 | !! prd(t) = 0.0285 - rn_alpha * t |
---|
446 | !! nn_eos = 2 : linear equation of state function of temperature and |
---|
447 | !! salinity |
---|
448 | !! prd(t,s) = rn_beta * s - rn_alpha * tn - 1. |
---|
449 | !! Note that no boundary condition problem occurs in this routine |
---|
450 | !! as pts are defined over the whole domain. |
---|
451 | !! |
---|
452 | !! ** Action : - prd , the in situ density (no units) |
---|
453 | !! |
---|
454 | !! References : Jackett and McDougall, J. Atmos. Ocean. Tech., 1994 |
---|
455 | !!---------------------------------------------------------------------- |
---|
456 | USE wrk_nemo, ONLY: wrk_in_use, wrk_not_released |
---|
457 | USE wrk_nemo, ONLY: zws => wrk_2d_5 ! 2D workspace |
---|
458 | !! |
---|
459 | REAL(wp), DIMENSION(jpi,jpj,jpts), INTENT(in ) :: pts ! 1 : potential temperature [Celcius] |
---|
460 | ! ! 2 : salinity [psu] |
---|
461 | REAL(wp), DIMENSION(jpi,jpj) , INTENT(in ) :: pdep ! depth [m] |
---|
462 | REAL(wp), DIMENSION(jpi,jpj) , INTENT( out) :: prd ! in situ density |
---|
463 | !! |
---|
464 | INTEGER :: ji, jj ! dummy loop indices |
---|
465 | REAL(wp) :: zt, zs, zh, zsr, zr1, zr2, zr3, zr4, zrhop, ze, zbw ! temporary scalars |
---|
466 | REAL(wp) :: zb, zd, zc, zaw, za, zb1, za1, zkw, zk0, zmask ! - - |
---|
467 | !!---------------------------------------------------------------------- |
---|
468 | |
---|
469 | IF( wrk_in_use(2, 5) ) THEN |
---|
470 | CALL ctl_stop('eos_insitu_2d: requested workspace array unavailable') ; RETURN |
---|
471 | ENDIF |
---|
472 | |
---|
473 | prd(:,:) = 0._wp |
---|
474 | |
---|
475 | SELECT CASE( nn_eos ) |
---|
476 | ! |
---|
477 | CASE( 0 ) !== Jackett and McDougall (1994) formulation ==! |
---|
478 | ! |
---|
479 | !CDIR NOVERRCHK |
---|
480 | DO jj = 1, jpjm1 |
---|
481 | !CDIR NOVERRCHK |
---|
482 | DO ji = 1, fs_jpim1 ! vector opt. |
---|
483 | zws(ji,jj) = SQRT( ABS( pts(ji,jj,jp_sal) ) ) |
---|
484 | END DO |
---|
485 | END DO |
---|
486 | DO jj = 1, jpjm1 |
---|
487 | DO ji = 1, fs_jpim1 ! vector opt. |
---|
488 | #if defined key_z_first |
---|
489 | zmask = tmask_1(ji,jj) ! land/sea bottom mask = surf. mask |
---|
490 | #else |
---|
491 | zmask = tmask(ji,jj,1) ! land/sea bottom mask = surf. mask |
---|
492 | #endif |
---|
493 | zt = pts (ji,jj,jp_tem) ! interpolated T |
---|
494 | zs = pts (ji,jj,jp_sal) ! interpolated S |
---|
495 | zsr = zws (ji,jj) ! square root of interpolated S |
---|
496 | zh = pdep (ji,jj) ! depth at the partial step level |
---|
497 | ! |
---|
498 | ! compute volumic mass pure water at atm pressure |
---|
499 | zr1 = ( ( ( ( 6.536332e-9_wp*zt-1.120083e-6_wp )*zt+1.001685e-4_wp )*zt & |
---|
500 | & -9.095290e-3_wp )*zt+6.793952e-2_wp )*zt+999.842594_wp |
---|
501 | ! seawater volumic mass atm pressure |
---|
502 | zr2 = ( ( ( 5.3875e-9_wp*zt-8.2467e-7_wp )*zt+7.6438e-5_wp ) *zt & |
---|
503 | & -4.0899e-3_wp ) *zt+0.824493_wp |
---|
504 | zr3 = ( -1.6546e-6_wp*zt+1.0227e-4_wp ) *zt-5.72466e-3_wp |
---|
505 | zr4 = 4.8314e-4_wp |
---|
506 | ! |
---|
507 | ! potential volumic mass (reference to the surface) |
---|
508 | zrhop= ( zr4*zs + zr3*zsr + zr2 ) *zs + zr1 |
---|
509 | ! |
---|
510 | ! add the compression terms |
---|
511 | ze = ( -3.508914e-8_wp*zt-1.248266e-8_wp ) *zt-2.595994e-6_wp |
---|
512 | zbw= ( 1.296821e-6_wp*zt-5.782165e-9_wp ) *zt+1.045941e-4_wp |
---|
513 | zb = zbw + ze * zs |
---|
514 | ! |
---|
515 | zd = -2.042967e-2_wp |
---|
516 | zc = (-7.267926e-5_wp*zt+2.598241e-3_wp ) *zt+0.1571896_wp |
---|
517 | zaw= ( ( 5.939910e-6_wp*zt+2.512549e-3_wp ) *zt-0.1028859_wp ) *zt -4.721788_wp |
---|
518 | za = ( zd*zsr + zc ) *zs + zaw |
---|
519 | ! |
---|
520 | zb1= (-0.1909078_wp *zt+7.390729_wp ) *zt-55.87545_wp |
---|
521 | za1= ( ( 2.326469e-3_wp*zt+1.553190_wp ) *zt-65.00517_wp ) *zt+1044.077_wp |
---|
522 | zkw= ( ( (-1.361629e-4_wp*zt-1.852732e-2_wp ) *zt-30.41638_wp ) *zt & |
---|
523 | & +2098.925_wp ) *zt+190925.6_wp |
---|
524 | zk0= ( zb1*zsr + za1 )*zs + zkw |
---|
525 | ! |
---|
526 | ! masked in situ density anomaly |
---|
527 | prd(ji,jj) = ( zrhop / ( 1.0_wp - zh / ( zk0 - zh * ( za - zh * zb ) ) ) - rau0 ) / rau0 * zmask |
---|
528 | END DO |
---|
529 | END DO |
---|
530 | ! |
---|
531 | CASE( 1 ) !== Linear formulation = F( temperature ) ==! |
---|
532 | DO jj = 1, jpjm1 |
---|
533 | DO ji = 1, fs_jpim1 ! vector opt. |
---|
534 | #if defined key_z_first |
---|
535 | prd(ji,jj) = ( 0.0285_wp - rn_alpha * pts(ji,jj,jp_tem) ) * tmask_1(ji,jj) |
---|
536 | #else |
---|
537 | prd(ji,jj) = ( 0.0285_wp - rn_alpha * pts(ji,jj,jp_tem) ) * tmask(ji,jj,1) |
---|
538 | #endif |
---|
539 | END DO |
---|
540 | END DO |
---|
541 | ! |
---|
542 | CASE( 2 ) !== Linear formulation = F( temperature , salinity ) ==! |
---|
543 | DO jj = 1, jpjm1 |
---|
544 | DO ji = 1, fs_jpim1 ! vector opt. |
---|
545 | #if defined key_z_first |
---|
546 | prd(ji,jj) = ( rn_beta * pts(ji,jj,jp_sal) - rn_alpha * pts(ji,jj,jp_tem) ) * tmask_1(ji,jj) |
---|
547 | #else |
---|
548 | prd(ji,jj) = ( rn_beta * pts(ji,jj,jp_sal) - rn_alpha * pts(ji,jj,jp_tem) ) * tmask(ji,jj,1) |
---|
549 | #endif |
---|
550 | END DO |
---|
551 | END DO |
---|
552 | ! |
---|
553 | END SELECT |
---|
554 | |
---|
555 | IF(ln_ctl) CALL prt_ctl( tab2d_1=prd, clinfo1=' eos2d: ' ) |
---|
556 | ! |
---|
557 | IF( wrk_not_released(2, 5) ) CALL ctl_stop('eos_insitu_2d: failed to release workspace array') |
---|
558 | ! |
---|
559 | END SUBROUTINE eos_insitu_2d |
---|
560 | |
---|
561 | |
---|
562 | SUBROUTINE eos_bn2( pts, pn2 ) |
---|
563 | !!---------------------------------------------------------------------- |
---|
564 | !! *** ROUTINE eos_bn2 *** |
---|
565 | !! |
---|
566 | !! ** Purpose : Compute the local Brunt-Vaisala frequency at the time- |
---|
567 | !! step of the input arguments |
---|
568 | !! |
---|
569 | !! ** Method : |
---|
570 | !! * nn_eos = 0 : UNESCO sea water properties |
---|
571 | !! The brunt-vaisala frequency is computed using the polynomial |
---|
572 | !! polynomial expression of McDougall (1987): |
---|
573 | !! N^2 = grav * beta * ( alpha/beta*dk[ t ] - dk[ s ] )/e3w |
---|
574 | !! If lk_zdfddm=T, the heat/salt buoyancy flux ratio Rrau is |
---|
575 | !! computed and used in zdfddm module : |
---|
576 | !! Rrau = alpha/beta * ( dk[ t ] / dk[ s ] ) |
---|
577 | !! * nn_eos = 1 : linear equation of state (temperature only) |
---|
578 | !! N^2 = grav * rn_alpha * dk[ t ]/e3w |
---|
579 | !! * nn_eos = 2 : linear equation of state (temperature & salinity) |
---|
580 | !! N^2 = grav * (rn_alpha * dk[ t ] - rn_beta * dk[ s ] ) / e3w |
---|
581 | !! The use of potential density to compute N^2 introduces e r r o r |
---|
582 | !! in the sign of N^2 at great depths. We recommand the use of |
---|
583 | !! nn_eos = 0, except for academical studies. |
---|
584 | !! Macro-tasked on horizontal slab (jk-loop) |
---|
585 | !! N.B. N^2 is set to zero at the first level (JK=1) in inidtr |
---|
586 | !! and is never used at this level. |
---|
587 | !! |
---|
588 | !! ** Action : - pn2 : the brunt-vaisala frequency |
---|
589 | !! |
---|
590 | !! References : McDougall, J. Phys. Oceanogr., 17, 1950-1964, 1987. |
---|
591 | !!---------------------------------------------------------------------- |
---|
592 | |
---|
593 | !FTRANS pts :I :I :z :I |
---|
594 | !FTRANS pn2 :I :I :z |
---|
595 | |
---|
596 | !!DCSE_NEMO: This style defeats ftrans |
---|
597 | ! REAL(wp), DIMENSION(jpi,jpj,jpk,jpts), INTENT(in ) :: pts ! 1 : potential temperature [Celcius] |
---|
598 | ! ! ! 2 : salinity [psu] |
---|
599 | ! REAL(wp), DIMENSION(jpi,jpj,jpk) , INTENT( out) :: pn2 ! Brunt-Vaisala frequency [s-1] |
---|
600 | |
---|
601 | REAL(wp), INTENT(in ) :: pts(jpi,jpj,jpk,jpts) ! 1 : potential temperature [Celcius] |
---|
602 | ! ! 2 : salinity [psu] |
---|
603 | REAL(wp), INTENT( out) :: pn2(jpi,jpj,jpk) ! Brunt-Vaisala frequency [s-1] |
---|
604 | !! |
---|
605 | INTEGER :: ji, jj, jk ! dummy loop indices |
---|
606 | REAL(wp) :: zgde3w, zt, zs, zh, zalbet, zbeta ! local scalars |
---|
607 | #if defined key_zdfddm |
---|
608 | REAL(wp) :: zds ! local scalars |
---|
609 | #endif |
---|
610 | !!---------------------------------------------------------------------- |
---|
611 | |
---|
612 | ! pn2 : interior points only (2=< jk =< jpkm1 ) |
---|
613 | ! -------------------------- |
---|
614 | ! |
---|
615 | SELECT CASE( nn_eos ) |
---|
616 | ! |
---|
617 | CASE( 0 ) !== Jackett and McDougall (1994) formulation ==! |
---|
618 | #if defined key_z_first |
---|
619 | DO jj = 1, jpj |
---|
620 | DO ji = 1, jpi |
---|
621 | DO jk = 2, jpkm1 |
---|
622 | #else |
---|
623 | DO jk = 2, jpkm1 |
---|
624 | DO jj = 1, jpj |
---|
625 | DO ji = 1, jpi |
---|
626 | #endif |
---|
627 | zgde3w = grav / fse3w(ji,jj,jk) |
---|
628 | zt = 0.5 * ( pts(ji,jj,jk,jp_tem) + pts(ji,jj,jk-1,jp_tem) ) ! potential temperature at w-pt |
---|
629 | zs = 0.5 * ( pts(ji,jj,jk,jp_sal) + pts(ji,jj,jk-1,jp_sal) ) - 35.0 ! salinity anomaly (s-35) at w-pt |
---|
630 | zh = fsdepw(ji,jj,jk) ! depth in meters at w-point |
---|
631 | ! |
---|
632 | zalbet = ( ( ( - 0.255019e-07_wp * zt + 0.298357e-05_wp ) * zt & ! ratio alpha/beta |
---|
633 | & - 0.203814e-03_wp ) * zt & |
---|
634 | & + 0.170907e-01_wp ) * zt & |
---|
635 | & + 0.665157e-01_wp & |
---|
636 | & + ( - 0.678662e-05_wp * zs & |
---|
637 | & - 0.846960e-04_wp * zt + 0.378110e-02_wp ) * zs & |
---|
638 | & + ( ( - 0.302285e-13_wp * zh & |
---|
639 | & - 0.251520e-11_wp * zs & |
---|
640 | & + 0.512857e-12_wp * zt * zt ) * zh & |
---|
641 | & - 0.164759e-06_wp * zs & |
---|
642 | & +( 0.791325e-08_wp * zt - 0.933746e-06_wp ) * zt & |
---|
643 | & + 0.380374e-04_wp ) * zh |
---|
644 | ! |
---|
645 | zbeta = ( ( -0.415613e-09_wp * zt + 0.555579e-07_wp ) * zt & ! beta |
---|
646 | & - 0.301985e-05_wp ) * zt & |
---|
647 | & + 0.785567e-03_wp & |
---|
648 | & + ( 0.515032e-08_wp * zs & |
---|
649 | & + 0.788212e-08_wp * zt - 0.356603e-06_wp ) * zs & |
---|
650 | & + ( ( 0.121551e-17_wp * zh & |
---|
651 | & - 0.602281e-15_wp * zs & |
---|
652 | & - 0.175379e-14_wp * zt + 0.176621e-12_wp ) * zh & |
---|
653 | & + 0.408195e-10_wp * zs & |
---|
654 | & + ( - 0.213127e-11_wp * zt + 0.192867e-09_wp ) * zt & |
---|
655 | & - 0.121555e-07_wp ) * zh |
---|
656 | ! |
---|
657 | pn2(ji,jj,jk) = zgde3w * zbeta * tmask(ji,jj,jk) & ! N^2 |
---|
658 | & * ( zalbet * ( pts(ji,jj,jk-1,jp_tem) - pts(ji,jj,jk,jp_tem) ) & |
---|
659 | & - ( pts(ji,jj,jk-1,jp_sal) - pts(ji,jj,jk,jp_sal) ) ) |
---|
660 | #if defined key_zdfddm |
---|
661 | ! !!bug **** caution a traiter zds=dk[S]= 0 !!!! |
---|
662 | zds = ( pts(ji,jj,jk-1,jp_sal) - pts(ji,jj,jk,jp_sal) ) ! Rrau = (alpha / beta) (dk[t] / dk[s]) |
---|
663 | IF ( ABS( zds) <= 1.e-20_wp ) zds = 1.e-20_wp |
---|
664 | rrau(ji,jj,jk) = zalbet * ( pts(ji,jj,jk-1,jp_tem) - pts(ji,jj,jk,jp_tem) ) / zds |
---|
665 | #endif |
---|
666 | END DO |
---|
667 | END DO |
---|
668 | END DO |
---|
669 | ! |
---|
670 | CASE( 1 ) !== Linear formulation = F( temperature ) ==! |
---|
671 | #if defined key_z_first |
---|
672 | DO jj = 1, jpj |
---|
673 | DO ji = 1, jpi |
---|
674 | DO jk = 2, jpkm1 |
---|
675 | pn2(ji,jj,jk) = grav * rn_alpha * ( pts(ji,jj,jk-1,jp_tem) - pts(ji,jj,jk,jp_tem) ) & |
---|
676 | & / fse3w(ji,jj,jk) * tmask(ji,jj,jk) |
---|
677 | END DO |
---|
678 | END DO |
---|
679 | END DO |
---|
680 | #else |
---|
681 | DO jk = 2, jpkm1 |
---|
682 | pn2(:,:,jk) = grav * rn_alpha * ( pts(:,:,jk-1,jp_tem) - pts(:,:,jk,jp_tem) ) / fse3w(:,:,jk) * tmask(:,:,jk) |
---|
683 | END DO |
---|
684 | #endif |
---|
685 | ! |
---|
686 | CASE( 2 ) !== Linear formulation = F( temperature , salinity ) ==! |
---|
687 | #if defined key_z_first |
---|
688 | DO jj = 1, jpj |
---|
689 | DO ji = 1, jpi |
---|
690 | DO jk = 2, jpkm1 |
---|
691 | pn2(ji,jj,jk) = grav * ( rn_alpha * ( pts(ji,jj,jk-1,jp_tem) - pts(ji,jj,jk,jp_tem) ) & |
---|
692 | & - rn_beta * ( pts(ji,jj,jk-1,jp_sal) - pts(ji,jj,jk,jp_sal) ) ) & |
---|
693 | & / fse3w(ji,jj,jk) * tmask(ji,jj,jk) |
---|
694 | END DO |
---|
695 | END DO |
---|
696 | END DO |
---|
697 | #else |
---|
698 | DO jk = 2, jpkm1 |
---|
699 | pn2(:,:,jk) = grav * ( rn_alpha * ( pts(:,:,jk-1,jp_tem) - pts(:,:,jk,jp_tem) ) & |
---|
700 | & - rn_beta * ( pts(:,:,jk-1,jp_sal) - pts(:,:,jk,jp_sal) ) ) & |
---|
701 | & / fse3w(:,:,jk) * tmask(:,:,jk) |
---|
702 | END DO |
---|
703 | #endif |
---|
704 | #if defined key_zdfddm |
---|
705 | #if defined key_z_first |
---|
706 | DO jj = 1, jpj ! Rrau = (alpha / beta) (dk[t] / dk[s]) |
---|
707 | DO ji = 1, jpi |
---|
708 | DO jk = 2, jpkm1 |
---|
709 | #else |
---|
710 | DO jk = 2, jpkm1 ! Rrau = (alpha / beta) (dk[t] / dk[s]) |
---|
711 | DO jj = 1, jpj |
---|
712 | DO ji = 1, jpi |
---|
713 | #endif |
---|
714 | zds = ( pts(ji,jj,jk-1,jp_sal) - pts(ji,jj,jk,jp_sal) ) |
---|
715 | IF ( ABS( zds ) <= 1.e-20_wp ) zds = 1.e-20_wp |
---|
716 | rrau(ji,jj,jk) = ralpbet * ( pts(ji,jj,jk-1,jp_tem) - pts(ji,jj,jk,jp_tem) ) / zds |
---|
717 | END DO |
---|
718 | END DO |
---|
719 | END DO |
---|
720 | #endif |
---|
721 | END SELECT |
---|
722 | |
---|
723 | IF(ln_ctl) CALL prt_ctl( tab3d_1=pn2, clinfo1=' bn2 : ', ovlap=1, kdim=jpk ) |
---|
724 | #if defined key_zdfddm |
---|
725 | IF(ln_ctl) CALL prt_ctl( tab3d_1=rrau, clinfo1=' rrau : ', ovlap=1, kdim=jpk ) |
---|
726 | #endif |
---|
727 | ! |
---|
728 | |
---|
729 | !! * Reset control of array index permutation |
---|
730 | !FTRANS CLEAR |
---|
731 | # include "dom_oce_ftrans.h90" |
---|
732 | # include "zdfddm_ftrans.h90" |
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733 | |
---|
734 | END SUBROUTINE eos_bn2 |
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735 | |
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736 | |
---|
737 | SUBROUTINE eos_alpbet( pts, palph, pbeta ) |
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738 | !!---------------------------------------------------------------------- |
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739 | !! *** ROUTINE ldf_slp_grif *** |
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740 | !! |
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741 | !! ** Purpose : Calculates the thermal and haline expansion coefficients at T-points. |
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742 | !! |
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743 | !! ** Method : calculates alpha and beta at T-points |
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744 | !! * nn_eos = 0 : UNESCO sea water properties |
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745 | !! The brunt-vaisala frequency is computed using the polynomial |
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746 | !! polynomial expression of McDougall (1987): |
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747 | !! N^2 = grav * beta * ( alpha/beta*dk[ t ] - dk[ s ] )/e3w |
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748 | !! If lk_zdfddm=T, the heat/salt buoyancy flux ratio Rrau is |
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749 | !! computed and used in zdfddm module : |
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750 | !! Rrau = alpha/beta * ( dk[ t ] / dk[ s ] ) |
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751 | !! * nn_eos = 1 : linear equation of state (temperature only) |
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752 | !! N^2 = grav * rn_alpha * dk[ t ]/e3w |
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753 | !! * nn_eos = 2 : linear equation of state (temperature & salinity) |
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754 | !! N^2 = grav * (rn_alpha * dk[ t ] - rn_beta * dk[ s ] ) / e3w |
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755 | !! * nn_eos = 3 : Jackett JAOT 2003 ??? |
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756 | !! |
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757 | !! ** Action : - palph, pbeta : thermal and haline expansion coeff. at T-point |
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758 | !!---------------------------------------------------------------------- |
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759 | |
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760 | !FTRANS pts :I :I :z :I |
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761 | !FTRANS palph :I :I :z |
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762 | !FTRANS pbeta :I :I :z |
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763 | !!DCSE_NEMO: This style defeats ftrans |
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764 | ! REAL(wp), DIMENSION(jpi,jpj,jpk,jpts), INTENT(in ) :: pts ! pot. temperature & salinity |
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765 | ! REAL(wp), DIMENSION(jpi,jpj,jpk) , INTENT( out) :: palph, pbeta ! thermal & haline expansion coeff. |
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766 | REAL(wp), INTENT(in ) :: pts(jpi,jpj,jpk,jpts) ! pot. temperature & salinity |
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767 | REAL(wp), INTENT( out) :: palph(jpi,jpj,jpk) ! thermal expansion coeff. |
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768 | REAL(wp), INTENT( out) :: pbeta(jpi,jpj,jpk) ! haline expansion coeff. |
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769 | ! |
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770 | INTEGER :: ji, jj, jk ! dummy loop indices |
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771 | REAL(wp) :: zt, zs, zh ! local scalars |
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772 | !!---------------------------------------------------------------------- |
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773 | ! |
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774 | SELECT CASE ( nn_eos ) |
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775 | ! |
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776 | CASE ( 0 ) ! Jackett and McDougall (1994) formulation |
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777 | #if defined key_z_first |
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778 | DO jj = 1, jpj |
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779 | DO ji = 1, jpi |
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780 | DO jk = 1, jpk |
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781 | #else |
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782 | DO jk = 1, jpk |
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783 | DO jj = 1, jpj |
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784 | DO ji = 1, jpi |
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785 | #endif |
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786 | zt = pts(ji,jj,jk,jp_tem) ! potential temperature |
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787 | zs = pts(ji,jj,jk,jp_sal) - 35._wp ! salinity anomaly (s-35) |
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788 | zh = fsdept(ji,jj,jk) ! depth in meters |
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789 | ! |
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790 | pbeta(ji,jj,jk) = ( ( -0.415613e-09_wp * zt + 0.555579e-07_wp ) * zt & |
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791 | & - 0.301985e-05_wp ) * zt & |
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792 | & + 0.785567e-03_wp & |
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793 | & + ( 0.515032e-08_wp * zs & |
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794 | & + 0.788212e-08_wp * zt - 0.356603e-06_wp ) * zs & |
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795 | & + ( ( 0.121551e-17_wp * zh & |
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796 | & - 0.602281e-15_wp * zs & |
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797 | & - 0.175379e-14_wp * zt + 0.176621e-12_wp ) * zh & |
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798 | & + 0.408195e-10_wp * zs & |
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799 | & + ( - 0.213127e-11_wp * zt + 0.192867e-09_wp ) * zt & |
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800 | & - 0.121555e-07_wp ) * zh |
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801 | ! |
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802 | palph(ji,jj,jk) = - pbeta(ji,jj,jk) * & |
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803 | & ((( ( - 0.255019e-07_wp * zt + 0.298357e-05_wp ) * zt & |
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804 | & - 0.203814e-03_wp ) * zt & |
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805 | & + 0.170907e-01_wp ) * zt & |
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806 | & + 0.665157e-01_wp & |
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807 | & + ( - 0.678662e-05_wp * zs & |
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808 | & - 0.846960e-04_wp * zt + 0.378110e-02_wp ) * zs & |
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809 | & + ( ( - 0.302285e-13_wp * zh & |
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810 | & - 0.251520e-11_wp * zs & |
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811 | & + 0.512857e-12_wp * zt * zt ) * zh & |
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812 | & - 0.164759e-06_wp * zs & |
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813 | & +( 0.791325e-08_wp * zt - 0.933746e-06_wp ) * zt & |
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814 | & + 0.380374e-04_wp ) * zh) |
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815 | END DO |
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816 | END DO |
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817 | END DO |
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818 | ! |
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819 | CASE ( 1 ) |
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820 | palph(:,:,:) = - rn_alpha |
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821 | pbeta(:,:,:) = 0._wp |
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822 | ! |
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823 | CASE ( 2 ) |
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824 | palph(:,:,:) = - rn_alpha |
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825 | pbeta(:,:,:) = rn_beta |
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826 | ! |
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827 | CASE DEFAULT |
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828 | IF(lwp) WRITE(numout,cform_err) |
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829 | IF(lwp) WRITE(numout,*) ' bad flag value for nn_eos = ', nn_eos |
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830 | nstop = nstop + 1 |
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831 | ! |
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832 | END SELECT |
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833 | ! |
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834 | |
---|
835 | !! * Reset control of array index permutation |
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836 | !FTRANS CLEAR |
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837 | # include "dom_oce_ftrans.h90" |
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838 | # include "zdfddm_ftrans.h90" |
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839 | |
---|
840 | END SUBROUTINE eos_alpbet |
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841 | |
---|
842 | |
---|
843 | FUNCTION tfreez( psal ) RESULT( ptf ) |
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844 | !!---------------------------------------------------------------------- |
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845 | !! *** ROUTINE eos_init *** |
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846 | !! |
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847 | !! ** Purpose : Compute the sea surface freezing temperature [Celcius] |
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848 | !! |
---|
849 | !! ** Method : UNESCO freezing point at the surface (pressure = 0???) |
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850 | !! freezing point [Celcius]=(-.0575+1.710523e-3*sqrt(abs(s))-2.154996e-4*s)*s-7.53e-4*p |
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851 | !! checkvalue: tf= -2.588567 Celsius for s=40.0psu, p=500. decibars |
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852 | !! |
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853 | !! Reference : UNESCO tech. papers in the marine science no. 28. 1978 |
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854 | !!---------------------------------------------------------------------- |
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855 | REAL(wp), DIMENSION(jpi,jpj), INTENT(in ) :: psal ! salinity [psu] |
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856 | ! Leave result array automatic rather than making explicitly allocated |
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857 | REAL(wp), DIMENSION(jpi,jpj) :: ptf ! freezing temperature [Celcius] |
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858 | !!---------------------------------------------------------------------- |
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859 | ! |
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860 | ptf(:,:) = ( - 0.0575_wp + 1.710523e-3_wp * SQRT( psal(:,:) ) & |
---|
861 | & - 2.154996e-4_wp * psal(:,:) ) * psal(:,:) |
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862 | ! |
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863 | END FUNCTION tfreez |
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864 | |
---|
865 | |
---|
866 | SUBROUTINE eos_init |
---|
867 | !!---------------------------------------------------------------------- |
---|
868 | !! *** ROUTINE eos_init *** |
---|
869 | !! |
---|
870 | !! ** Purpose : initializations for the equation of state |
---|
871 | !! |
---|
872 | !! ** Method : Read the namelist nameos and control the parameters |
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873 | !!---------------------------------------------------------------------- |
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874 | NAMELIST/nameos/ nn_eos, rn_alpha, rn_beta |
---|
875 | !!---------------------------------------------------------------------- |
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876 | ! |
---|
877 | REWIND( numnam ) ! Read Namelist nameos : equation of state |
---|
878 | READ ( numnam, nameos ) |
---|
879 | ! |
---|
880 | IF(lwp) THEN ! Control print |
---|
881 | WRITE(numout,*) |
---|
882 | WRITE(numout,*) 'eos_init : equation of state' |
---|
883 | WRITE(numout,*) '~~~~~~~~' |
---|
884 | WRITE(numout,*) ' Namelist nameos : set eos parameters' |
---|
885 | WRITE(numout,*) ' flag for eq. of state and N^2 nn_eos = ', nn_eos |
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886 | WRITE(numout,*) ' thermal exp. coef. (linear) rn_alpha = ', rn_alpha |
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887 | WRITE(numout,*) ' saline exp. coef. (linear) rn_beta = ', rn_beta |
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888 | ENDIF |
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889 | ! |
---|
890 | SELECT CASE( nn_eos ) ! check option |
---|
891 | ! |
---|
892 | CASE( 0 ) !== Jackett and McDougall (1994) formulation ==! |
---|
893 | IF(lwp) WRITE(numout,*) |
---|
894 | IF(lwp) WRITE(numout,*) ' use of Jackett & McDougall (1994) equation of state and' |
---|
895 | IF(lwp) WRITE(numout,*) ' McDougall (1987) Brunt-Vaisala frequency' |
---|
896 | ! |
---|
897 | CASE( 1 ) !== Linear formulation = F( temperature ) ==! |
---|
898 | IF(lwp) WRITE(numout,*) |
---|
899 | IF(lwp) WRITE(numout,*) ' use of linear eos rho(T) = rau0 * ( 1.0285 - rn_alpha * T )' |
---|
900 | IF( lk_zdfddm ) CALL ctl_stop( ' double diffusive mixing parameterization requires', & |
---|
901 | & ' that T and S are used as state variables' ) |
---|
902 | ! |
---|
903 | CASE( 2 ) !== Linear formulation = F( temperature , salinity ) ==! |
---|
904 | ralpbet = rn_alpha / rn_beta |
---|
905 | IF(lwp) WRITE(numout,*) |
---|
906 | IF(lwp) WRITE(numout,*) ' use of linear eos rho(T,S) = rau0 * ( rn_beta * S - rn_alpha * T )' |
---|
907 | ! |
---|
908 | CASE DEFAULT !== ERROR in nn_eos ==! |
---|
909 | WRITE(ctmp1,*) ' bad flag value for nn_eos = ', nn_eos |
---|
910 | CALL ctl_stop( ctmp1 ) |
---|
911 | ! |
---|
912 | END SELECT |
---|
913 | ! |
---|
914 | END SUBROUTINE eos_init |
---|
915 | |
---|
916 | !!====================================================================== |
---|
917 | END MODULE eosbn2 |
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