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 | !! === VORTEX 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 , ONLY : glamt, gphit, glamu, gphiu, glamv, gphiv |
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17 | USE phycst ! physical constants |
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18 | ! |
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19 | USE in_out_manager ! I/O manager |
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20 | USE lib_mpp ! MPP library |
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21 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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22 | ! |
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23 | USE usrdef_nam, ONLY : rn_ppgphi0 ! Reference latitude |
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24 | |
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25 | IMPLICIT NONE |
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26 | PRIVATE |
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27 | |
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28 | PUBLIC usr_def_istate ! called by istate.F90 |
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29 | |
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30 | !!---------------------------------------------------------------------- |
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31 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
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32 | !! $Id$ |
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33 | !! Software governed by the CeCILL license (see ./LICENSE) |
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34 | !!---------------------------------------------------------------------- |
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35 | CONTAINS |
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36 | |
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37 | SUBROUTINE usr_def_istate( pdept, ptmask, pts, pu, pv, pssh ) |
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38 | !!---------------------------------------------------------------------- |
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39 | !! *** ROUTINE usr_def_istate *** |
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40 | !! |
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41 | !! ** Purpose : Initialization of the dynamics and tracers |
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42 | !! Here VORTEX configuration |
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43 | !! |
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44 | !! ** Method : Set a gaussian anomaly of pressure and associated |
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45 | !! geostrophic velocities |
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46 | !!---------------------------------------------------------------------- |
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47 | REAL(wp), DIMENSION(jpi,jpj,jpk) , INTENT(in ) :: pdept ! depth of t-point [m] |
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48 | REAL(wp), DIMENSION(jpi,jpj,jpk) , INTENT(in ) :: ptmask ! t-point ocean mask [m] |
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49 | REAL(wp), DIMENSION(jpi,jpj,jpk,jpts), INTENT( out) :: pts ! T & S fields [Celsius ; g/kg] |
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50 | REAL(wp), DIMENSION(jpi,jpj,jpk) , INTENT( out) :: pu ! i-component of the velocity [m/s] |
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51 | REAL(wp), DIMENSION(jpi,jpj,jpk) , INTENT( out) :: pv ! j-component of the velocity [m/s] |
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52 | REAL(wp), DIMENSION(jpi,jpj) , INTENT( out) :: pssh ! sea-surface height |
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53 | ! |
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54 | INTEGER :: ji, jj, jk ! dummy loop indices |
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55 | REAL(wp) :: zx, zy, zP0, zumax, zlambda, zn2, zf0, zH, zrho1, za, zf |
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56 | REAL(wp) :: zdt, zdu, zdv |
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57 | !!---------------------------------------------------------------------- |
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58 | ! |
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59 | IF(lwp) WRITE(numout,*) |
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60 | IF(lwp) WRITE(numout,*) 'usr_def_istate : VORTEX configuration, analytical definition of initial state' |
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61 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~~~~ ' |
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62 | ! |
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63 | ! |
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64 | ! |
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65 | zf0 = 2._wp * omega * SIN( rad * rn_ppgphi0 ) |
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66 | zumax = 1._wp * SIGN(1._wp, zf0) ! Here Anticyclonic: set zumax=-1 for cyclonic |
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67 | zlambda = SQRT(2._wp)*60.e3 ! Horizontal scale in meters |
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68 | zn2 = 3.e-3**2 |
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69 | zH = 0.5_wp * 5000._wp |
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70 | ! |
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71 | zP0 = rau0 * zf0 * zumax * zlambda * SQRT(EXP(1._wp)/2._wp) |
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72 | ! |
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73 | ! Sea level: |
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74 | za = -zP0 * (1._wp-EXP(-zH)) / (grav*(zH-1._wp + EXP(-zH))) |
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75 | DO ji=1, jpi |
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76 | DO jj=1, jpj |
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77 | zx = glamt(ji,jj) * 1.e3 |
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78 | zy = gphit(ji,jj) * 1.e3 |
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79 | zrho1 = rau0 + za * EXP(-(zx**2+zy**2)/zlambda**2) |
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80 | pssh(ji,jj) = zP0 * EXP(-(zx**2+zy**2)/zlambda**2)/(zrho1*grav) * ptmask(ji,jj,1) |
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81 | END DO |
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82 | END DO |
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83 | ! |
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84 | ! temperature: |
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85 | DO ji=1, jpi |
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86 | DO jj=1, jpj |
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87 | zx = glamt(ji,jj) * 1.e3 |
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88 | zy = gphit(ji,jj) * 1.e3 |
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89 | DO jk=1,jpk |
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90 | zdt = pdept(ji,jj,jk) |
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91 | zrho1 = rau0 * (1._wp + zn2*zdt/grav) |
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92 | IF (zdt < zH) THEN |
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93 | zrho1 = zrho1 - zP0 * (1._wp-EXP(zdt-zH)) & |
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94 | & * EXP(-(zx**2+zy**2)/zlambda**2) / (grav*(zH -1._wp + exp(-zH))); |
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95 | ENDIF |
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96 | pts(ji,jj,jk,jp_tem) = (20._wp + (rau0-zrho1) / 0.28_wp) * ptmask(ji,jj,jk) |
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97 | END DO |
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98 | END DO |
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99 | END DO |
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100 | ! |
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101 | ! salinity: |
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102 | pts(:,:,:,jp_sal) = 35._wp |
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103 | ! |
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104 | ! velocities: |
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105 | za = 2._wp * zP0 / (zf0 * rau0 * zlambda**2) |
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106 | DO ji=1, jpim1 |
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107 | DO jj=1, jpj |
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108 | zx = glamu(ji,jj) * 1.e3 |
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109 | zy = gphiu(ji,jj) * 1.e3 |
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110 | DO jk=1, jpk |
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111 | zdu = 0.5_wp * (pdept(ji ,jj,jk) + pdept(ji+1,jj,jk)) |
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112 | IF (zdu < zH) THEN |
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113 | zf = (zH-1._wp-zdu+EXP(zdu-zH)) / (zH-1._wp+EXP(-zH)) |
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114 | pu(ji,jj,jk) = (za * zf * zy * EXP(-(zx**2+zy**2)/zlambda**2)) * ptmask(ji,jj,jk) * ptmask(ji+1,jj,jk) |
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115 | ELSE |
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116 | pu(ji,jj,jk) = 0._wp |
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117 | ENDIF |
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118 | END DO |
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119 | END DO |
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120 | END DO |
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121 | ! |
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122 | DO ji=1, jpi |
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123 | DO jj=1, jpjm1 |
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124 | zx = glamv(ji,jj) * 1.e3 |
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125 | zy = gphiv(ji,jj) * 1.e3 |
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126 | DO jk=1, jpk |
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127 | zdv = 0.5_wp * (pdept(ji ,jj,jk) + pdept(ji,jj+1,jk)) |
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128 | IF (zdv < zH) THEN |
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129 | zf = (zH-1._wp-zdv+EXP(zdv-zH)) / (zH-1._wp+EXP(-zH)) |
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130 | pv(ji,jj,jk) = -(za * zf * zx * EXP(-(zx**2+zy**2)/zlambda**2)) * ptmask(ji,jj,jk) * ptmask(ji,jj+1,jk) |
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131 | ELSE |
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132 | pv(ji,jj,jk) = 0._wp |
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133 | ENDIF |
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134 | END DO |
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135 | END DO |
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136 | END DO |
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137 | |
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138 | CALL lbc_lnk( pu, 'U', -1. ) |
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139 | CALL lbc_lnk( pv, 'V', -1. ) |
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140 | ! |
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141 | END SUBROUTINE usr_def_istate |
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142 | |
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143 | !!====================================================================== |
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144 | END MODULE usrdef_istate |
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