1 | MODULE usrdef_istate |
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2 | !!====================================================================== |
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3 | !! *** MODULE usrdef_istate *** |
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4 | !! |
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5 | !! === CANAL configuration === |
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6 | !! |
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7 | !! User defined : set the initial state of a user configuration |
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8 | !!====================================================================== |
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9 | !! History : NEMO ! 2017-11 (J. Chanut) Original code |
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10 | !!---------------------------------------------------------------------- |
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11 | |
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12 | !!---------------------------------------------------------------------- |
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13 | !! usr_def_istate : initial state in Temperature and salinity |
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14 | !!---------------------------------------------------------------------- |
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15 | USE par_oce ! ocean space and time domain |
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16 | USE dom_oce |
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17 | USE phycst ! physical constants |
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18 | USE eosbn2, ONLY: rn_a0 |
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19 | ! |
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20 | USE in_out_manager ! I/O manager |
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21 | USE lib_mpp ! MPP library |
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22 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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23 | ! |
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24 | USE usrdef_nam |
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25 | |
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26 | IMPLICIT NONE |
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27 | PRIVATE |
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28 | |
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29 | PUBLIC usr_def_istate ! called by istate.F90 |
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30 | PUBLIC usr_def_istate_ssh ! called by sshwzv.F90 |
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31 | |
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32 | !! * Substitutions |
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33 | # include "do_loop_substitute.h90" |
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34 | !!---------------------------------------------------------------------- |
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35 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
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36 | !! $Id$ |
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37 | !! Software governed by the CeCILL license (see ./LICENSE) |
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38 | !!---------------------------------------------------------------------- |
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39 | CONTAINS |
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40 | |
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41 | SUBROUTINE usr_def_istate( pdept, ptmask, pts, pu, pv ) |
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42 | !!---------------------------------------------------------------------- |
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43 | !! *** ROUTINE usr_def_istate *** |
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44 | !! |
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45 | !! ** Purpose : Initialization of the dynamics and tracers |
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46 | !! Here CANAL configuration |
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47 | !! |
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48 | !! ** Method : Set a gaussian anomaly of pressure and associated |
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49 | !! geostrophic velocities |
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50 | !!---------------------------------------------------------------------- |
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51 | REAL(wp), DIMENSION(jpi,jpj,jpk) , INTENT(in ) :: pdept ! depth of t-point [m] |
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52 | REAL(wp), DIMENSION(jpi,jpj,jpk) , INTENT(in ) :: ptmask ! t-point ocean mask [m] |
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53 | REAL(wp), DIMENSION(jpi,jpj,jpk,jpts), INTENT( out) :: pts ! T & S fields [Celsius ; g/kg] |
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54 | REAL(wp), DIMENSION(jpi,jpj,jpk) , INTENT( out) :: pu ! i-component of the velocity [m/s] |
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55 | REAL(wp), DIMENSION(jpi,jpj,jpk) , INTENT( out) :: pv ! j-component of the velocity [m/s] |
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56 | ! |
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57 | INTEGER :: ji, jj, jk, jl ! dummy loop indices |
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58 | REAL(wp) :: zx, zy, zP0, zumax, zlambda, zr_lambda2, zn2, zf0, zH, zrho1, za, zf, zdzF |
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59 | REAL(wp) :: zpsurf, zdyPs, zdxPs |
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60 | REAL(wp) :: zdt, zdu, zdv |
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61 | REAL(wp) :: zjetx, zjety, zbeta |
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62 | REAL(wp), DIMENSION(jpi,jpj) :: zrandom |
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63 | !!---------------------------------------------------------------------- |
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64 | ! |
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65 | IF(lwp) WRITE(numout,*) |
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66 | IF(lwp) WRITE(numout,*) 'usr_def_istate : CANAL configuration, analytical definition of initial state' |
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67 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~~~~ ' |
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68 | ! |
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69 | zjetx = ABS(rn_ujetszx)/2. |
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70 | zjety = ABS(rn_ujetszy)/2. |
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71 | ! |
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72 | zf0 = 2._wp * omega * SIN( rad * rn_ppgphi0 ) |
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73 | ! |
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74 | SELECT CASE(nn_initcase) |
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75 | |
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76 | CASE(-1) ! stratif at rest |
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77 | |
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78 | ! temperature: |
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79 | pts(:,:,1,jp_tem) = 25. !!30._wp |
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80 | pts(:,:,2:jpk,jp_tem) = 22. !!24._wp |
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81 | ! salinity: |
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82 | pts(:,:,:,jp_sal) = 35._wp |
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83 | ! velocities: |
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84 | pu(:,:,:) = 0. |
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85 | pv(:,:,:) = 0. |
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86 | |
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87 | CASE(0) ! rest |
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88 | ! |
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89 | ! temperature: |
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90 | pts(:,:,:,jp_tem) = 10._wp |
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91 | ! salinity: |
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92 | pts(:,:,:,jp_sal) = 35._wp |
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93 | ! velocities: |
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94 | pu(:,:,:) = 0. |
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95 | pv(:,:,:) = 0. |
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96 | |
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97 | CASE(1) ! geostrophic zonal jet from -zjety to +zjety |
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98 | ! |
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99 | ! temperature: |
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100 | pts(:,:,:,jp_tem) = 10._wp |
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101 | ! salinity: |
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102 | pts(:,:,jpk,jp_sal) = 0. |
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103 | DO jk=1, jpkm1 |
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104 | WHERE( ABS(gphit) <= zjety ) |
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105 | !!$ WHERE( ABS(gphit) <= zjety*0.5 .AND. ABS(glamt) <= zjety*0.5 ) ! for a square of salt |
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106 | pts(:,:,jk,jp_sal) = 35. |
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107 | ELSEWHERE |
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108 | pts(:,:,jk,jp_sal) = 30. |
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109 | END WHERE |
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110 | END DO |
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111 | ! velocities: |
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112 | pu(:,:,:) = 0. |
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113 | DO jk=1, jpkm1 |
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114 | WHERE( ABS(gphit) <= zjety ) pu(:,:,jk) = rn_uzonal |
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115 | END DO |
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116 | pv(:,:,:) = 0. |
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117 | ! |
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118 | CASE(2) ! geostrophic zonal current shear |
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119 | ! |
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120 | ! temperature: |
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121 | pts(:,:,:,jp_tem) = 10._wp |
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122 | ! salinity: |
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123 | pts(:,:,:,jp_sal) = 30. |
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124 | DO jk=1, jpkm1 |
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125 | WHERE( ABS(gphiv) <= zjety ) pts(:,:,jk,jp_sal) = 30. + SIGN(1.,gphiv(:,:)) |
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126 | END DO |
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127 | ! velocities: |
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128 | pu(:,:,:) = 0. |
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129 | DO jk=1, jpkm1 |
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130 | WHERE( ABS(gphiv) <= zjety ) pu(:,:,jk) = SIGN(rn_uzonal,gphit(:,:))*SIGN(1.,rn_uzonal) |
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131 | WHERE( ABS(gphiv) == 0. ) pu(:,:,jk) = 0. |
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132 | END DO |
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133 | pv(:,:,:) = 0. |
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134 | ! |
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135 | CASE(3) ! gaussian zonal currant |
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136 | ! |
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137 | ! zonal current |
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138 | DO jk=1, jpkm1 |
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139 | ! gphit and lambda are both in km |
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140 | pu(:,:,jk) = rn_uzonal * EXP( - 0.5 * gphit(:,:)**2 / rn_lambda**2 ) |
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141 | END DO |
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142 | ! temperature: |
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143 | pts(:,:,:,jp_tem) = 10._wp |
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144 | ! salinity: |
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145 | DO jk=1, jpkm1 |
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146 | pts(:,:,jk,jp_sal) = gphit(:,:) |
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147 | END DO |
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148 | ! velocities: |
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149 | pv(:,:,:) = 0. |
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150 | ! |
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151 | CASE(4) ! geostrophic zonal pulse |
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152 | ! |
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153 | DO_2D( 1, 1, 1, 1 ) |
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154 | IF ( ABS(glamt(ji,jj)) <= zjetx ) THEN |
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155 | zdu = rn_uzonal |
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156 | ELSEIF ( ABS(glamt(ji,jj)) <= zjetx + 100. ) THEN |
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157 | zdu = rn_uzonal * ( ( zjetx-ABS(glamt(ji,jj)) )/100. + 1. ) |
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158 | ELSE |
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159 | zdu = 0. |
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160 | ENDIF |
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161 | IF ( ABS(gphit(ji,jj)) <= zjety ) THEN |
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162 | pu(ji,jj,:) = zdu |
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163 | pts(ji,jj,:,jp_sal) = zdu / rn_uzonal + 1. |
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164 | ELSE |
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165 | pu(ji,jj,:) = 0. |
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166 | pts(ji,jj,:,jp_sal) = 1. |
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167 | ENDIF |
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168 | END_2D |
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169 | ! |
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170 | ! temperature: |
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171 | pts(:,:,:,jp_tem) = 10._wp * ptmask(:,:,:) |
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172 | pv(:,:,:) = 0. |
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173 | ! |
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174 | CASE(5) ! vortex |
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175 | ! |
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176 | zf0 = 2._wp * omega * SIN( rad * rn_ppgphi0 ) |
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177 | zumax = rn_vtxmax * SIGN(1._wp, zf0) ! Here Anticyclonic: set zumax=-1 for cyclonic |
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178 | zlambda = SQRT(2._wp)*rn_lambda*1.e3 ! Horizontal scale in meters |
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179 | zn2 = 3.e-3**2 |
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180 | zH = 0.5_wp * 5000._wp |
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181 | ! |
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182 | zr_lambda2 = 1._wp / zlambda**2 |
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183 | zP0 = rho0 * zf0 * zumax * zlambda * SQRT(EXP(1._wp)/2._wp) |
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184 | ! |
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185 | DO_2D( 1, 1, 1, 1 ) |
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186 | zx = glamt(ji,jj) * 1.e3 |
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187 | zy = gphit(ji,jj) * 1.e3 |
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188 | ! Surface pressure: P(x,y,z) = F(z) * Psurf(x,y) |
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189 | zpsurf = zP0 * EXP(-(zx**2+zy**2)*zr_lambda2) - rho0 * ff_t(ji,jj) * rn_uzonal * zy |
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190 | ! temperature: |
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191 | DO jk=1,jpk |
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192 | zdt = pdept(ji,jj,jk) |
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193 | zrho1 = rho0 * (1._wp + zn2*zdt/grav) |
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194 | IF (zdt < zH) THEN |
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195 | zdzF = (1._wp-EXP(zdt-zH)) / (zH-1._wp + EXP(-zH)) ! F'(z) |
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196 | zrho1 = zrho1 - zdzF * zpsurf / grav ! -1/g Dz(P) = -1/g * F'(z) * Psurf(x,y) |
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197 | ENDIF |
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198 | ! pts(ji,jj,jk,jp_tem) = (20._wp + (rho0-zrho1) / rn_a0) * ptmask(ji,jj,jk) |
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199 | pts(ji,jj,jk,jp_tem) = (10._wp + (rho0-zrho1) / rn_a0) * ptmask(ji,jj,jk) |
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200 | END DO |
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201 | END_2D |
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202 | ! |
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203 | ! salinity: |
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204 | pts(:,:,:,jp_sal) = 35._wp * ptmask(:,:,:) |
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205 | ! |
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206 | ! velocities: |
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207 | za = 2._wp * zP0 / zlambda**2 |
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208 | DO_2D( 0, 0, 0, 0 ) |
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209 | zx = glamu(ji,jj) * 1.e3 |
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210 | zy = gphiu(ji,jj) * 1.e3 |
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211 | DO jk=1, jpk |
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212 | zdu = 0.5_wp * (pdept(ji,jj,jk) + pdept(ji+1,jj,jk)) |
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213 | IF (zdu < zH) THEN |
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214 | zf = (zH-1._wp-zdu+EXP(zdu-zH)) / (zH-1._wp+EXP(-zH)) |
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215 | zdyPs = - za * zy * EXP(-(zx**2+zy**2)*zr_lambda2) - rho0 * ff_t(ji,jj) * rn_uzonal |
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216 | pu(ji,jj,jk) = - zf / ( rho0 * ff_t(ji,jj) ) * zdyPs * ptmask(ji,jj,jk) * ptmask(ji+1,jj,jk) |
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217 | ELSE |
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218 | pu(ji,jj,jk) = 0._wp |
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219 | ENDIF |
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220 | END DO |
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221 | END_2D |
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222 | ! |
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223 | DO_2D( 0, 0, 0, 0 ) |
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224 | zx = glamv(ji,jj) * 1.e3 |
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225 | zy = gphiv(ji,jj) * 1.e3 |
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226 | DO jk=1, jpk |
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227 | zdv = 0.5_wp * (pdept(ji,jj,jk) + pdept(ji,jj+1,jk)) |
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228 | IF (zdv < zH) THEN |
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229 | zf = (zH-1._wp-zdv+EXP(zdv-zH)) / (zH-1._wp+EXP(-zH)) |
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230 | zdxPs = - za * zx * EXP(-(zx**2+zy**2)*zr_lambda2) |
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231 | pv(ji,jj,jk) = zf / ( rho0 * ff_f(ji,jj) ) * zdxPs * ptmask(ji,jj,jk) * ptmask(ji,jj+1,jk) |
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232 | ELSE |
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233 | pv(ji,jj,jk) = 0._wp |
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234 | ENDIF |
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235 | END DO |
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236 | END_2D |
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237 | ! |
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238 | END SELECT |
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239 | ! |
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240 | CALL lbc_lnk( 'usrdef_istate', pts , 'T', 1. ) |
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241 | CALL lbc_lnk( 'usrdef_istate', pu, 'U', -1., pv, 'V', -1. ) |
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242 | |
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243 | END SUBROUTINE usr_def_istate |
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244 | |
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245 | |
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246 | SUBROUTINE usr_def_istate_ssh( ptmask, pssh ) |
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247 | !!---------------------------------------------------------------------- |
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248 | !! *** ROUTINE usr_def_istate_ssh *** |
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249 | !! |
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250 | !! ** Purpose : Initialization of the dynamics and tracers |
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251 | !! Here CANAL configuration |
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252 | !! |
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253 | !! ** Method : Set ssh |
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254 | !!---------------------------------------------------------------------- |
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255 | REAL(wp), DIMENSION(jpi,jpj,jpk) , INTENT(in ) :: ptmask ! t-point ocean mask [m] |
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256 | REAL(wp), DIMENSION(jpi,jpj) , INTENT( out) :: pssh ! sea-surface height |
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257 | ! |
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258 | INTEGER :: ji, jj, jk, jl ! dummy loop indices |
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259 | REAL(wp) :: zx, zy, zP0, zumax, zlambda, zr_lambda2, zn2, zf0, zH, zrho1, za, zf, zdzF |
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260 | REAL(wp) :: zpsurf, zdyPs, zdxPs |
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261 | REAL(wp) :: zdt, zdu, zdv |
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262 | REAL(wp) :: zjetx, zjety, zbeta |
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263 | REAL(wp), DIMENSION(jpi,jpj) :: zrandom |
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264 | !!---------------------------------------------------------------------- |
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265 | ! |
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266 | IF(lwp) WRITE(numout,*) |
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267 | IF(lwp) WRITE(numout,*) 'usr_def_istate_ssh : CANAL configuration, analytical definition of initial state' |
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268 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~~~~ ' |
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269 | ! |
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270 | IF (ln_sshnoise) CALL RANDOM_NUMBER(zrandom) |
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271 | zjetx = ABS(rn_ujetszx)/2. |
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272 | zjety = ABS(rn_ujetszy)/2. |
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273 | ! |
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274 | SELECT CASE(nn_initcase) |
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275 | CASE(0) !== rest ==! |
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276 | ! |
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277 | pssh(:,:) = 0. |
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278 | ! |
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279 | CASE(1) !== geostrophic zonal jet from -zjety to +zjety ==! |
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280 | ! |
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281 | SELECT CASE( nn_fcase ) |
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282 | CASE(0) !* f = f0 : ssh = - fuy / g |
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283 | WHERE( ABS(gphit) <= zjety ) |
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284 | pssh(:,:) = - ff_t(:,:) * rn_uzonal * gphit(:,:) * 1.e3 / grav |
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285 | ELSEWHERE |
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286 | pssh(:,:) = - ff_t(:,:) * rn_uzonal * SIGN(zjety, gphit(:,:)) * 1.e3 / grav |
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287 | END WHERE |
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288 | CASE(1) !* f = f0 + beta*y : ssh = - u / g * ( fy + 0.5 * beta * y^2 ) |
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289 | zbeta = 2._wp * omega * COS( rad * rn_ppgphi0 ) / ra |
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290 | WHERE( ABS(gphit) <= zjety ) |
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291 | pssh(:,:) = - rn_uzonal / grav * ( ff_t(:,:) * gphit(:,:) * 1.e3 + 0.5 * zbeta * gphit(:,:) * gphit(:,:) * 1.e6 ) |
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292 | ELSEWHERE |
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293 | pssh(:,:) = - rn_uzonal / grav * ( ff_t(:,:) * SIGN(zjety, gphit(:,:)) * 1.e3 & |
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294 | & + 0.5 * zbeta * zjety * zjety * 1.e6 ) |
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295 | END WHERE |
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296 | END SELECT |
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297 | ! |
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298 | CASE(2) !== geostrophic zonal current shear ==! |
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299 | ! |
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300 | SELECT CASE( nn_fcase ) |
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301 | CASE(0) !* f = f0 : ssh = - fuy / g |
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302 | WHERE( ABS(gphit) <= zjety ) |
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303 | pssh(:,:) = - ff_t(:,:) * rn_uzonal * ABS(gphit(:,:)) * 1.e3 / grav |
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304 | ELSEWHERE |
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305 | pssh(:,:) = - ff_t(:,:) * rn_uzonal * zjety * 1.e3 / grav |
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306 | END WHERE |
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307 | CASE(1) !* f = f0 + beta*y : ssh = - u / g * ( fy + 0.5 * beta * y^2 ) |
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308 | zbeta = 2._wp * omega * COS( rad * rn_ppgphi0 ) / ra |
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309 | WHERE( ABS(gphit) <= zjety ) |
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310 | pssh(:,:) = - SIGN(rn_uzonal, gphit(:,:)) / grav & |
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311 | & * ( ff_t(:,:) * gphit(:,:) * 1.e3 + 0.5 * zbeta * gphit(:,:) * gphit(:,:) * 1.e6 ) |
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312 | ELSEWHERE |
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313 | pssh(:,:) = - SIGN(rn_uzonal, gphit(:,:)) / grav & |
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314 | & * ( ff_t(:,:) * SIGN(zjety, gphit(:,:)) * 1.e3 + 0.5 * zbeta * zjety * zjety * 1.e6 ) |
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315 | END WHERE |
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316 | END SELECT |
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317 | ! |
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318 | CASE(3) !== gaussian zonal currant ==! |
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319 | ! |
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320 | pssh(:,1) = - ff_t(:,1) / grav * e2t(:,1) * rn_uzonal * EXP( - 0.5 * gphit(:,1)**2 / rn_lambda**2 ) |
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321 | DO jl=1, jpnj |
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322 | DO_2D( 0, 0, 0, 0 ) |
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323 | pssh(ji,jj) = pssh(ji,jj-1) - ff_t(ji,jj) / grav * rn_uzonal * EXP( - 0.5 * gphit(ji,jj)**2 / rn_lambda**2 ) * e2t(ji,jj) |
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324 | END_2D |
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325 | CALL lbc_lnk( 'usrdef_istate_ssh', pssh, 'T', 1. ) |
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326 | END DO |
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327 | ! |
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328 | CASE(4) !== geostrophic zonal pulse !!st need to implement a way to separate ssh properly ==! |
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329 | ! |
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330 | DO_2D( 1, 1, 1, 1 ) |
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331 | IF ( ABS(glamt(ji,jj)) <= zjetx ) THEN |
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332 | zdu = rn_uzonal |
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333 | ELSEIF ( ABS(glamt(ji,jj)) <= zjetx + 100. ) THEN |
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334 | zdu = rn_uzonal * ( ( zjetx-ABS(glamt(ji,jj)) )/100. + 1. ) |
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335 | ELSE |
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336 | zdu = 0. |
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337 | ENDIF |
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338 | IF ( ABS(gphit(ji,jj)) <= zjety ) THEN |
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339 | pssh(ji,jj) = - ff_t(ji,jj) * zdu * gphit(ji,jj) * 1.e3 / grav |
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340 | ELSE |
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341 | pssh(ji,jj) = - ff_t(ji,jj) * zdu * SIGN(zjety,gphit(ji,jj)) * 1.e3 / grav |
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342 | ENDIF |
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343 | END_2D |
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344 | ! |
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345 | CASE(5) !== vortex ==! |
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346 | ! |
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347 | zf0 = 2._wp * omega * SIN( rad * rn_ppgphi0 ) |
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348 | zumax = rn_vtxmax * SIGN(1._wp, zf0) ! Here Anticyclonic: set zumax=-1 for cyclonic |
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349 | zlambda = SQRT(2._wp)*rn_lambda ! Horizontal scale in meters |
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350 | zn2 = 3.e-3**2 |
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351 | zH = 0.5_wp * 5000._wp |
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352 | ! |
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353 | zr_lambda2 = 1._wp / zlambda**2 |
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354 | zP0 = rho0 * zf0 * zumax * zlambda * SQRT(EXP(1._wp)/2._wp) |
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355 | ! |
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356 | DO_2D( 1, 1, 1, 1 ) |
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357 | zx = glamt(ji,jj) * 1.e3 |
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358 | zy = gphit(ji,jj) * 1.e3 |
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359 | ! ! Surface pressure: P(x,y,z) = F(z) * Psurf(x,y) |
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360 | zpsurf = zP0 * EXP(-(zx**2+zy**2)*zr_lambda2) - rho0 * ff_t(ji,jj) * rn_uzonal * zy |
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361 | pssh(ji,jj) = 0. |
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362 | DO jl=1,5 |
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363 | zdt = pssh(ji,jj) |
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364 | zdzF = (1._wp - EXP(zdt-zH)) / (zH - 1._wp + EXP(-zH)) ! F'(z) |
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365 | zrho1 = rho0 * (1._wp + zn2*zdt/grav) - zdzF * zpsurf / grav ! -1/g Dz(P) = -1/g * F'(z) * Psurf(x,y) |
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366 | pssh(ji,jj) = zpsurf / (zrho1*grav) * ptmask(ji,jj,1) ! ssh = Psurf / (Rho*g) |
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367 | END DO |
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368 | END_2D |
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369 | ! |
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370 | END SELECT |
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371 | ! !== add noise ==! |
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372 | IF (ln_sshnoise) THEN |
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373 | CALL RANDOM_SEED() |
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374 | CALL RANDOM_NUMBER(zrandom) |
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375 | pssh(:,:) = pssh(:,:) + ( 0.1 * zrandom(:,:) - 0.05 ) |
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376 | ENDIF |
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377 | CALL lbc_lnk( 'usrdef_istate_ssh', pssh, 'T', 1. ) |
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378 | ! |
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379 | END SUBROUTINE usr_def_istate_ssh |
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380 | |
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381 | !!====================================================================== |
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382 | END MODULE usrdef_istate |
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