1 | MODULE dynnept |
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2 | !!====================================================================== |
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3 | !! *** MODULE dynnept *** |
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4 | !! Ocean dynamics: Neptune effect as proposed by Greg Holloway, |
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5 | !! recoded version of simplest case (u*, v* only) |
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6 | !!====================================================================== |
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7 | !! History : 1.0 ! 2007-06 (Zeliang Wang, Michael Dunphy, BIO) Original code |
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8 | !! Modular form: - new namelist parameters |
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9 | !! - horizontal diffusion for Neptune |
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10 | !! - vertical diffusion for gm in momentum eqns |
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11 | !! - option to use Neptune in Coriolis eqn |
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12 | !! 2011-08 (Jeff Blundell, NOCS) Simplified form for temporally invariant u*, v* |
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13 | !! Horizontal and vertical diffusivity formulations removed |
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14 | !! Dynamic allocation of storage added |
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15 | !! Option of ramping Neptune vel. down to zero added in shallow depths added |
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16 | !!---------------------------------------------------------------------- |
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17 | |
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18 | !!---------------------------------------------------------------------- |
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19 | !! dynnept_alloc : |
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20 | !! dyn_nept_init : |
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21 | !! dyn_nept_div_cur_init: |
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22 | !! dyn_nept_cor : |
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23 | !! dyn_nept_vel : |
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24 | !! dyn_nept_smooth_vel : |
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25 | !!---------------------------------------------------------------------- |
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26 | USE oce ! ocean dynamics and tracers |
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27 | USE dom_oce ! ocean space and time domain |
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28 | USE obc_oce ! ocean lateral open boundary condition |
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29 | USE in_out_manager ! I/O manager |
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30 | USE lib_mpp ! distributed memory computing |
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31 | USE prtctl ! Print control |
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32 | USE phycst |
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33 | USE lbclnk |
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34 | USE wrk_nemo ! Memory Allocation |
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35 | |
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36 | IMPLICIT NONE |
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37 | PRIVATE |
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38 | |
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39 | PUBLIC dyn_nept_init ! routine called by nemogcm.F90 |
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40 | PUBLIC dyn_nept_cor ! routine called by step.F90 |
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41 | |
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42 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: zunep, zvnep ! Neptune u and v |
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43 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: zhdivnep ! hor. div for Neptune vel. |
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44 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: zmrotnep ! curl for Neptune vel. |
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45 | |
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46 | ! !!* Namelist namdyn_nept variables |
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47 | LOGICAL, PUBLIC :: ln_neptsimp = .FALSE. ! yes/no simplified neptune |
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48 | |
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49 | LOGICAL :: ln_smooth_neptvel = .FALSE. ! yes/no smooth zunep, zvnep |
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50 | REAL(wp) :: rn_tslse = 1.2e4 ! value of lengthscale L at the equator |
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51 | REAL(wp) :: rn_tslsp = 3.0e3 ! value of lengthscale L at the pole |
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52 | !! Specify whether to ramp down the Neptune velocity in shallow |
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53 | !! water, and the depth range controlling such ramping down |
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54 | LOGICAL :: ln_neptramp = .FALSE. ! ramp down Neptune velocity in shallow water |
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55 | REAL(wp) :: rn_htrmin = 100.0 ! min. depth of transition range |
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56 | REAL(wp) :: rn_htrmax = 200.0 ! max. depth of transition range |
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57 | |
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58 | !! * Substitutions |
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59 | # include "vectopt_loop_substitute.h90" |
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60 | # include "domzgr_substitute.h90" |
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61 | !!---------------------------------------------------------------------- |
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62 | !! NEMO/OPA 3.3 , NEMO Consortium (2011) |
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63 | !! $Id: dynadv_cen2.F90 3316 2012-02-21 16:00:02Z gm $ |
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64 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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65 | !!---------------------------------------------------------------------- |
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66 | CONTAINS |
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67 | |
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68 | INTEGER FUNCTION dynnept_alloc() |
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69 | !!---------------------------------------------------------------------- |
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70 | !! *** ROUTINE dynnept_alloc *** |
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71 | !!---------------------------------------------------------------------- |
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72 | ALLOCATE( zunep(jpi,jpj) , zvnep(jpi,jpj) , & |
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73 | & zhdivnep(jpi,jpj,jpk) , zmrotnep(jpi,jpj,jpk) , STAT=dynnept_alloc ) |
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74 | ! |
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75 | IF( dynnept_alloc /= 0 ) CALL ctl_warn('dynnept_alloc: array allocate failed.') |
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76 | END FUNCTION dynnept_alloc |
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77 | |
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78 | |
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79 | SUBROUTINE dyn_nept_init |
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80 | !!---------------------------------------------------------------------- |
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81 | !! *** ROUTINE dyn_nept_init *** |
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82 | !! |
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83 | !! ** Purpose : Read namelist parameters, initialise arrays |
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84 | !! and compute the arrays zunep and zvnep |
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85 | !! |
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86 | !! ** Method : Simplified form for temporally invariant u*, v* |
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87 | !! Horizontal and vertical diffusivity formulations removed |
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88 | !! Includes optional tapering-off in shallow depths |
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89 | !!---------------------------------------------------------------------- |
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90 | USE iom |
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91 | ! |
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92 | INTEGER :: ji, jj, jk ! dummy loop indices |
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93 | REAL(wp) :: unemin,unemax,vnemin,vnemax ! extrema of (u*, v*) fields |
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94 | REAL(wp) :: zhdivmin,zhdivmax ! extrema of horizontal divergence of (u*, v*) fields |
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95 | REAL(wp) :: zmrotmin,zmrotmax ! extrema of the curl of the (u*, v*) fields |
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96 | REAL(wp) :: ustar,vstar ! (u*, v*) before tapering in shallow water |
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97 | REAL(wp) :: hramp ! depth over which Neptune vel. is ramped down |
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98 | ! |
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99 | REAL(wp), POINTER, DIMENSION(:,: ) :: ht, htn, tscale, tsp, hur_n, hvr_n, hu_n, hv_n |
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100 | REAL(wp), POINTER, DIMENSION(:,:,:) :: znmask |
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101 | !! |
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102 | NAMELIST/namdyn_nept/ ln_neptsimp, ln_smooth_neptvel, rn_tslse, rn_tslsp, & |
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103 | ln_neptramp, rn_htrmin, rn_htrmax |
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104 | !!---------------------------------------------------------------------- |
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105 | ! ! Dynamically allocate local work arrays |
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106 | CALL wrk_alloc( jpi, jpj , ht, htn, tscale, tsp, hur_n, hvr_n, hu_n, hv_n ) |
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107 | CALL wrk_alloc( jpi, jpj, jpk, znmask ) |
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108 | ! |
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109 | ! Define the (simplified) Neptune parameters |
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110 | ! ========================================== |
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111 | |
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112 | REWIND( numnam ) ! Read Namelist namdyn_nept: Simplified Neptune |
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113 | READ ( numnam, namdyn_nept ) |
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114 | |
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115 | IF(lwp) THEN ! Control print |
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116 | WRITE(numout,*) |
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117 | WRITE(numout,*) 'dyn_nept_init : Simplified Neptune module enabled' |
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118 | WRITE(numout,*) '~~~~~~~~~~~~~' |
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119 | WRITE(numout,*) ' --> Reading namelist namdyn_nept parameters:' |
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120 | WRITE(numout,*) ' ln_neptsimp = ', ln_neptsimp |
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121 | WRITE(numout,*) |
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122 | WRITE(numout,*) ' ln_smooth_neptvel = ', ln_smooth_neptvel |
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123 | WRITE(numout,*) ' rn_tslse = ', rn_tslse |
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124 | WRITE(numout,*) ' rn_tslsp = ', rn_tslsp |
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125 | WRITE(numout,*) |
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126 | WRITE(numout,*) ' ln_neptramp = ', ln_neptramp |
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127 | WRITE(numout,*) ' rn_htrmin = ', rn_htrmin |
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128 | WRITE(numout,*) ' rn_htrmax = ', rn_htrmax |
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129 | WRITE(numout,*) |
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130 | CALL FLUSH(numout) |
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131 | ENDIF |
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132 | |
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133 | IF( ln_smooth_neptvel ) THEN |
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134 | IF(lwp) WRITE(numout,*) ' --> neptune velocities will be smoothed' |
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135 | ELSE |
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136 | IF(lwp) WRITE(numout,*) ' --> neptune velocities will not be smoothed' |
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137 | ENDIF |
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138 | |
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139 | IF( ln_neptsimp ) THEN |
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140 | IF(lwp) WRITE(numout,*) ' --> ln_neptsimp enabled, solving for U-UN' |
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141 | ELSE |
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142 | IF(lwp) WRITE(numout,*) ' --> ln_neptsimp disabled' |
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143 | RETURN |
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144 | ENDIF |
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145 | |
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146 | IF( ln_neptramp ) THEN |
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147 | IF(lwp) WRITE(numout,*) ' --> ln_neptramp enabled, ramp down Neptune' |
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148 | IF(lwp) WRITE(numout,*) ' --> velocity components in shallow water' |
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149 | ELSE |
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150 | IF(lwp) WRITE(numout,*) ' --> ln_neptramp disabled' |
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151 | ENDIF |
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152 | |
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153 | |
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154 | !! Perform dynamic allocation of shared module variables |
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155 | IF( dynnept_alloc() /= 0 ) CALL ctl_warn('dynnept_alloc: array allocate failed.') |
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156 | |
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157 | IF( .not. ln_rstart ) THEN ! If restarting, these arrays are read from the restart file |
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158 | zhdivnep(:,:,:) = 0._wp |
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159 | zmrotnep(:,:,:) = 0._wp |
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160 | END IF |
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161 | |
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162 | ! Computation of nmask: same as fmask, but fmask cannot be used |
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163 | ! because it is modified after it is computed in dom_msk |
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164 | ! (this can be optimised to save memory, such as merge into next loop) |
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165 | DO jk = 1, jpk |
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166 | DO jj = 1, jpjm1 |
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167 | DO ji = 1, fs_jpim1 ! vector loop |
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168 | znmask(ji,jj,jk) = tmask(ji,jj ,jk) * tmask(ji+1,jj ,jk) & |
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169 | & * tmask(ji,jj+1,jk) * tmask(ji+1,jj+1,jk) |
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170 | END DO |
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171 | END DO |
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172 | END DO |
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173 | |
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174 | CALL lbc_lnk( znmask, 'F', 1.0_wp ) |
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175 | |
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176 | |
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177 | ! now compute zunep, zvnep (renamed from earlier versions) |
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178 | |
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179 | zunep(:,:) = 0.0_wp |
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180 | zvnep(:,:) = 0.0_wp |
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181 | |
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182 | htn(:,:) = 0.0_wp ! ocean depth at F-point |
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183 | DO jk = 1, jpk |
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184 | htn(:,:) = htn(:,:) + fse3f(:,:,jk) * znmask(:,:,jk) |
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185 | END DO |
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186 | |
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187 | IF( ln_smooth_neptvel ) THEN |
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188 | CALL dyn_nept_smooth_vel( htn, ht, .TRUE. ) |
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189 | !! overwrites ht with a smoothed version of htn |
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190 | ELSE |
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191 | ht(:,:) = htn(:,:) |
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192 | !! use unsmoothed version of htn |
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193 | ENDIF |
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194 | CALL lbc_lnk( ht, 'F', 1.0_wp ) |
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195 | |
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196 | !! Compute tsp, a stream function for the Neptune velocity, |
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197 | !! with the usual geophysical sign convention |
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198 | !! Then zunep = -latitudinal derivative "-(1/H)*d(tsp)/dy" |
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199 | !! zvnep = longitudinal derivative " (1/H)*d(tsp)/dx" |
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200 | |
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201 | tsp(:,:) = 0.0_wp |
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202 | tscale(:,:) = 0.0_wp |
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203 | |
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204 | tscale(:,:) = rn_tslsp + (rn_tslse - rn_tslsp) * & |
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205 | ( 0.5_wp + 0.5_wp * COS( 2.0_wp * rad * gphif(:,:) ) ) |
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206 | tsp (:,:) = -2.0_wp * omega * SIN( rad * gphif(:,:) ) * tscale(:,:) * tscale(:,:) * ht(:,:) |
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207 | |
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208 | |
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209 | IF( ln_smooth_neptvel ) THEN |
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210 | CALL dyn_nept_smooth_vel( hu, hu_n, .TRUE. ) |
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211 | !! overwrites hu_n with a smoothed version of hu |
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212 | ELSE |
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213 | hu_n(:,:) = hu(:,:) |
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214 | !! use unsmoothed version of hu |
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215 | ENDIF |
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216 | CALL lbc_lnk( hu_n, 'U', 1.0_wp ) |
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217 | hu_n(:,:) = hu_n(:,:) * umask(:,:,1) |
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218 | |
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219 | WHERE( hu_n(:,:) == 0.0_wp ) |
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220 | hur_n(:,:) = 0.0_wp |
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221 | ELSEWHERE |
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222 | hur_n(:,:) = 1.0_wp / hu_n(:,:) |
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223 | END WHERE |
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224 | |
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225 | |
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226 | IF( ln_smooth_neptvel ) THEN |
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227 | CALL dyn_nept_smooth_vel( hv, hv_n, .TRUE. ) |
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228 | !! overwrites hv_n with a smoothed version of hv |
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229 | ELSE |
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230 | hv_n(:,:) = hv(:,:) |
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231 | !! use unsmoothed version of hv |
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232 | ENDIF |
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233 | CALL lbc_lnk( hv_n, 'V', 1.0_wp ) |
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234 | hv_n(:,:) = hv_n(:,:) * vmask(:,:,1) |
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235 | |
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236 | WHERE( hv_n == 0.0_wp ) |
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237 | hvr_n(:,:) = 0.0_wp |
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238 | ELSEWHERE |
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239 | hvr_n(:,:) = 1.0_wp / hv_n(:,:) |
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240 | END WHERE |
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241 | |
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242 | |
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243 | unemin = 1.0e35 |
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244 | unemax = -1.0e35 |
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245 | vnemin = 1.0e35 |
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246 | vnemax = -1.0e35 |
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247 | hramp = rn_htrmax - rn_htrmin |
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248 | DO jj = 2, jpj-1 |
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249 | DO ji = 2, jpi-1 |
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250 | if ( umask(ji,jj,1) /= 0.0_wp ) then |
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251 | ustar =-1.0_wp/e2u(ji,jj) * hur_n(ji,jj) * ( tsp(ji,jj)-tsp(ji,jj-1) ) * umask(ji,jj,1) |
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252 | if ( ln_neptramp ) then |
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253 | !! Apply ramp down to velocity component |
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254 | if ( hu_n(ji,jj) <= rn_htrmin ) then |
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255 | zunep(ji,jj) = 0.0_wp |
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256 | else if ( hu_n(ji,jj) >= rn_htrmax ) then |
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257 | zunep(ji,jj) = ustar |
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258 | else if ( hramp > 0.0_wp ) then |
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259 | zunep(ji,jj) = ( hu_n(ji,jj) - rn_htrmin) * ustar/hramp |
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260 | endif |
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261 | else |
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262 | zunep(ji,jj) = ustar |
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263 | endif |
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264 | else |
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265 | zunep(ji,jj) = 0.0_wp |
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266 | endif |
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267 | if ( vmask(ji,jj,1) /= 0.0_wp ) then |
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268 | vstar = 1.0_wp/e1v(ji,jj) * hvr_n(ji,jj) * ( tsp(ji,jj)-tsp(ji-1,jj) ) * vmask(ji,jj,1) |
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269 | if ( ln_neptramp ) then |
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270 | !! Apply ramp down to velocity component |
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271 | if ( hv_n(ji,jj) <= rn_htrmin ) then |
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272 | zvnep(ji,jj) = 0.0_wp |
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273 | else if ( hv_n(ji,jj) >= rn_htrmax ) then |
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274 | zvnep(ji,jj) = vstar |
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275 | else if ( hramp > 0.0_wp ) then |
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276 | zvnep(ji,jj) = ( hv_n(ji,jj) - rn_htrmin) * vstar/hramp |
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277 | endif |
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278 | else |
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279 | zvnep(ji,jj) = vstar |
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280 | endif |
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281 | else |
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282 | zvnep(ji,jj) = 0.0_wp |
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283 | endif |
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284 | unemin = min( unemin, zunep(ji,jj) ) |
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285 | unemax = max( unemax, zunep(ji,jj) ) |
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286 | vnemin = min( vnemin, zvnep(ji,jj) ) |
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287 | vnemax = max( vnemax, zvnep(ji,jj) ) |
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288 | END DO |
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289 | END DO |
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290 | CALL lbc_lnk( zunep, 'U', -1.0_wp ) |
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291 | CALL lbc_lnk( zvnep, 'V', -1.0_wp ) |
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292 | WRITE(numout,*) ' zunep: min, max = ', unemin,unemax |
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293 | WRITE(numout,*) ' zvnep: min, max = ', vnemin,vnemax |
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294 | WRITE(numout,*) |
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295 | |
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296 | !! Compute, once and for all, the horizontal divergence (zhdivnep) |
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297 | !! and the curl (zmrotnep) of the Neptune velocity field (zunep, zvnep) |
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298 | CALL dyn_nept_div_cur_init |
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299 | |
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300 | !! Check the ranges of the computed divergence & vorticity |
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301 | zhdivmin = 1.0e35 |
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302 | zhdivmax = -1.0e35 |
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303 | zmrotmin = 1.0e35 |
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304 | zmrotmax = -1.0e35 |
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305 | hramp = rn_htrmax - rn_htrmin |
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306 | DO jk = 1, jpkm1 ! Horizontal slab |
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307 | DO jj = 2, jpj-1 |
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308 | DO ji = 2, jpi-1 |
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309 | zhdivmin = min( zhdivmin, zhdivnep(ji,jj,jk) ) |
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310 | zhdivmax = max( zhdivmax, zhdivnep(ji,jj,jk) ) |
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311 | zmrotmin = min( zmrotmin, zmrotnep(ji,jj,jk) ) |
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312 | zmrotmax = max( zmrotmax, zmrotnep(ji,jj,jk) ) |
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313 | END DO |
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314 | END DO |
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315 | END DO |
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316 | WRITE(numout,*) ' zhdivnep: min, max = ', zhdivmin,zhdivmax |
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317 | WRITE(numout,*) ' zmrotnep: min, max = ', zmrotmin,zmrotmax |
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318 | WRITE(numout,*) |
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319 | |
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320 | !! Deallocate temporary workspace arrays, which are all local to |
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321 | !! this routine, except where passed as arguments to other routines |
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322 | CALL wrk_dealloc( jpi, jpj , ht, htn, tscale, tsp, hur_n, hvr_n, hu_n, hv_n ) |
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323 | CALL wrk_dealloc( jpi, jpj, jpk, znmask ) |
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324 | ! |
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325 | END SUBROUTINE dyn_nept_init |
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326 | |
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327 | |
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328 | SUBROUTINE dyn_nept_div_cur_init |
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329 | !!---------------------------------------------------------------------- |
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330 | !! *** ROUTINE dyn_nept_div_cur_init *** |
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331 | !! |
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332 | !! ** Purpose : compute the horizontal divergence and the relative |
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333 | !! vorticity of the time-invariant u* and v* Neptune |
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334 | !! effect velocities (called zunep, zvnep) |
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335 | !! |
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336 | !! ** Method : - Divergence: |
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337 | !! - compute the divergence given by : |
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338 | !! zhdivnep = 1/(e1t*e2t*e3t) ( di[e2u*e3u zunep] + dj[e1v*e3v zvnep] ) |
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339 | !! - compute the curl in tensorial formalism: |
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340 | !! zmrotnep = 1/(e1f*e2f) ( di[e2v zvnep] - dj[e1u zunep] ) |
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341 | !! Note: Coastal boundary condition: lateral friction set through |
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342 | !! the value of fmask along the coast (see dommsk.F90) and shlat |
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343 | !! (namelist parameter) |
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344 | !! |
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345 | !! ** Action : - compute zhdivnep, the hor. divergence of (u*, v*) |
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346 | !! - compute zmrotnep, the rel. vorticity of (u*, v*) |
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347 | !!---------------------------------------------------------------------- |
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348 | ! |
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349 | INTEGER :: ji, jj, jk ! dummy loop indices |
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350 | !!---------------------------------------------------------------------- |
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351 | ! |
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352 | IF(lwp) WRITE(numout,*) |
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353 | IF(lwp) WRITE(numout,*) 'dyn_nept_div_cur_init :' |
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354 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~~~~~~~~~' |
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355 | IF(lwp) WRITE(numout,*) 'horizontal velocity divergence and' |
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356 | IF(lwp) WRITE(numout,*) 'relative vorticity of Neptune flow' |
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357 | #if defined key_noslip_accurate |
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358 | !!---------------------------------------------------------------------- |
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359 | !! 'key_noslip_accurate' 2nd order centered scheme |
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360 | !! 4th order at the coast |
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361 | !!---------------------------------------------------------------------- |
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362 | IF(lwp) WRITE(numout,*) |
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363 | IF(lwp) WRITE(numout,*) 'WARNING: key_noslip_accurate option' |
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364 | IF(lwp) WRITE(numout,*) 'not implemented in simplified Neptune' |
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365 | CALL ctl_warn( ' noslip_accurate option not implemented' ) |
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366 | #endif |
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367 | |
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368 | !!---------------------------------------------------------------------- |
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369 | !! Default option 2nd order centered schemes |
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370 | !!---------------------------------------------------------------------- |
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371 | |
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372 | ! Apply the div and curl operators to the depth-dependent velocity |
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373 | ! field produced by multiplying (zunep, zvnep) by (umask, vmask), exactly |
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374 | ! equivalent to the equivalent calculation in the unsimplified code |
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375 | ! ! =============== |
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376 | DO jk = 1, jpkm1 ! Horizontal slab |
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377 | ! ! =============== |
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378 | ! ! -------- |
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379 | ! Horizontal divergence ! div |
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380 | ! ! -------- |
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381 | DO jj = 2, jpjm1 |
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382 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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383 | zhdivnep(ji,jj,jk) = & |
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384 | & ( e2u(ji ,jj )*fse3u(ji ,jj ,jk) * zunep(ji ,jj ) * umask(ji ,jj ,jk) & |
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385 | & - e2u(ji-1,jj )*fse3u(ji-1,jj ,jk) * zunep(ji-1,jj ) * umask(ji-1,jj ,jk) & |
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386 | & + e1v(ji ,jj )*fse3v(ji ,jj ,jk) * zvnep(ji ,jj ) * vmask(ji ,jj ,jk) & |
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387 | & - e1v(ji ,jj-1)*fse3v(ji ,jj-1,jk) * zvnep(ji ,jj-1) * vmask(ji ,jj-1,jk) ) & |
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388 | & / ( e1t(ji,jj) * e2t(ji,jj) * fse3t(ji,jj,jk) ) |
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389 | END DO |
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390 | END DO |
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391 | |
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392 | #if defined key_obc |
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393 | IF( Agrif_Root() ) THEN |
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394 | ! open boundaries (div must be zero behind the open boundary) |
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395 | ! mpp remark: The zeroing of zhdivnep can probably be extended to 1->jpi/jpj for the correct row/column |
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396 | IF( lp_obc_east ) zhdivnep(nie0p1:nie1p1,nje0 :nje1 ,jk) = 0.0_wp ! east |
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397 | IF( lp_obc_west ) zhdivnep(niw0 :niw1 ,njw0 :njw1 ,jk) = 0.0_wp ! west |
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398 | IF( lp_obc_north ) zhdivnep(nin0 :nin1 ,njn0p1:njn1p1,jk) = 0.0_wp ! north |
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399 | IF( lp_obc_south ) zhdivnep(nis0 :nis1 ,njs0 :njs1 ,jk) = 0.0_wp ! south |
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400 | ENDIF |
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401 | #endif |
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402 | IF( .NOT. AGRIF_Root() ) THEN |
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403 | IF ((nbondi == 1).OR.(nbondi == 2)) zhdivnep(nlci-1 , : ,jk) = 0.0_wp ! east |
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404 | IF ((nbondi == -1).OR.(nbondi == 2)) zhdivnep(2 , : ,jk) = 0.0_wp ! west |
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405 | IF ((nbondj == 1).OR.(nbondj == 2)) zhdivnep(: ,nlcj-1 ,jk) = 0.0_wp ! north |
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406 | IF ((nbondj == -1).OR.(nbondj == 2)) zhdivnep(: ,2 ,jk) = 0.0_wp ! south |
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407 | ENDIF |
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408 | |
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409 | ! ! -------- |
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410 | ! relative vorticity ! rot |
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411 | ! ! -------- |
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412 | DO jj = 1, jpjm1 |
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413 | DO ji = 1, fs_jpim1 ! vector opt. |
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414 | zmrotnep(ji,jj,jk) = & |
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415 | & ( e2v(ji+1,jj ) * zvnep(ji+1,jj ) * vmask(ji+1,jj ,jk) & |
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416 | & - e2v(ji ,jj ) * zvnep(ji ,jj ) * vmask(ji ,jj ,jk) & |
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417 | & - e1u(ji ,jj+1) * zunep(ji ,jj+1) * umask(ji ,jj+1,jk) & |
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418 | & + e1u(ji ,jj ) * zunep(ji ,jj ) * umask(ji ,jj ,jk) ) & |
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419 | & * fmask(ji,jj,jk) / ( e1f(ji,jj) * e2f(ji,jj) ) |
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420 | END DO |
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421 | END DO |
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422 | ! ! =============== |
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423 | END DO ! End of slab |
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424 | ! ! =============== |
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425 | |
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426 | ! 4. Lateral boundary conditions on zhdivnep and zmrotnep |
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427 | ! ----------------------------------=======-----======= |
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428 | CALL lbc_lnk( zhdivnep, 'T', 1. ) ; CALL lbc_lnk( zmrotnep , 'F', 1. ) ! lateral boundary cond. (no sign change) |
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429 | ! |
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430 | END SUBROUTINE dyn_nept_div_cur_init |
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431 | |
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432 | |
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433 | SUBROUTINE dyn_nept_cor( kt ) |
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434 | !!---------------------------------------------------------------------- |
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435 | !! *** ROUTINE dyn_nept_cor *** |
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436 | !! |
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437 | !! ** Purpose : Add or subtract the Neptune velocity from the now velocities |
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438 | !! |
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439 | !! ** Method : First call : kt not equal to lastkt -> subtract zunep, zvnep |
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440 | !! Second call: kt equal to lastkt -> add zunep, zvnep |
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441 | !!---------------------------------------------------------------------- |
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442 | INTEGER, INTENT( in ) :: kt ! ocean time-step index |
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443 | !! |
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444 | INTEGER, SAVE :: lastkt ! store previous kt |
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445 | DATA lastkt/-1/ ! initialise previous kt |
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446 | !!---------------------------------------------------------------------- |
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447 | ! |
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448 | IF( ln_neptsimp ) THEN |
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449 | ! |
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450 | IF( lastkt /= kt ) THEN ! 1st call for this kt: subtract the Neptune velocities zunep, zvnep from un, vn |
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451 | CALL dyn_nept_vel( -1 ) ! -1 = subtract |
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452 | ! |
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453 | ELSE ! 2nd call for this kt: add the Neptune velocities zunep, zvnep to un, vn |
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454 | CALL dyn_nept_vel( 1 ) ! 1 = add |
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455 | ! |
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456 | ENDIF |
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457 | ! |
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458 | lastkt = kt ! Store kt |
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459 | ! |
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460 | ENDIF |
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461 | ! |
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462 | END SUBROUTINE dyn_nept_cor |
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463 | |
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464 | |
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465 | SUBROUTINE dyn_nept_vel( ksign ) |
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466 | !!---------------------------------------------------------------------- |
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467 | !! *** ROUTINE dyn_nept_vel *** |
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468 | !! |
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469 | !! ** Purpose : Add or subtract the Neptune velocity from the now |
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470 | !! velocities based on ksign |
---|
471 | !!---------------------------------------------------------------------- |
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472 | INTEGER, INTENT( in ) :: ksign ! 1 or -1 to add or subtract neptune velocities |
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473 | !! |
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474 | INTEGER :: jk ! dummy loop index |
---|
475 | !!---------------------------------------------------------------------- |
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476 | ! |
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477 | ! Adjust the current velocity un, vn by adding or subtracting the |
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478 | ! Neptune velocities zunep, zvnep, as determined by argument ksign |
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479 | DO jk=1, jpk |
---|
480 | un(:,:,jk) = un(:,:,jk) + ksign * zunep(:,:) * umask(:,:,jk) |
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481 | vn(:,:,jk) = vn(:,:,jk) + ksign * zvnep(:,:) * vmask(:,:,jk) |
---|
482 | END DO |
---|
483 | ! |
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484 | END SUBROUTINE dyn_nept_vel |
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485 | |
---|
486 | |
---|
487 | SUBROUTINE dyn_nept_smooth_vel( htold, htnew, ld_option ) |
---|
488 | !!---------------------------------------------------------------------- |
---|
489 | !! *** ROUTINE dyn_nept_smooth_vel *** |
---|
490 | !! |
---|
491 | !! ** Purpose : Compute smoothed topography field. |
---|
492 | !! |
---|
493 | !! ** Action : - Updates the array htnew (output) with a smoothed |
---|
494 | !! version of the (input) array htold. Form of smoothing |
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495 | !! algorithm is controlled by the (logical) argument ld_option. |
---|
496 | !!---------------------------------------------------------------------- |
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497 | REAL(wp), DIMENSION(jpi,jpj), INTENT(in ) :: htold ! temporary 2D workspace |
---|
498 | LOGICAL , INTENT(in ) :: ld_option ! temporary 2D workspace |
---|
499 | REAL(wp), DIMENSION(jpi,jpj), INTENT(inout) :: htnew ! temporary 2D workspace |
---|
500 | ! |
---|
501 | INTEGER :: ji, jj ! dummy loop indices |
---|
502 | INTEGER , POINTER, DIMENSION(:,:) :: nb, iwork |
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503 | REAL(wp), POINTER, DIMENSION(:,:) :: work ! temporary 2D workspace |
---|
504 | !!---------------------------------------------------------------------- |
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505 | ! |
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506 | CALL wrk_alloc( jpi, jpj, nb, iwork ) |
---|
507 | CALL wrk_alloc( jpi, jpj, work ) |
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508 | ! |
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509 | iwork(:,:) = 0 |
---|
510 | |
---|
511 | !! iwork is a mask of gridpoints: iwork = 1 => ocean, iwork = 0 => land |
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512 | WHERE( htold(:,:) > 0 ) |
---|
513 | iwork(:,:) = 1 |
---|
514 | htnew(:,:) = htold(:,:) |
---|
515 | ELSEWHERE |
---|
516 | iwork(:,:) = 0 |
---|
517 | htnew(:,:) = 0.0_wp |
---|
518 | END WHERE |
---|
519 | !! htnew contains valid ocean depths from htold, or zero |
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520 | |
---|
521 | !! set work to a smoothed/averaged version of htnew; choice controlled by ld_option |
---|
522 | !! nb is set to the sum of the weights of the valid values used in work |
---|
523 | IF( ld_option ) THEN |
---|
524 | |
---|
525 | !! Apply scale-selective smoothing in determining work from htnew |
---|
526 | DO jj=2,jpj-1 |
---|
527 | DO ji=2,jpi-1 |
---|
528 | work(ji,jj) = 4.0*htnew( ji , jj ) + & |
---|
529 | & 2.0*htnew(ji+1, jj ) + 2.0*htnew(ji-1, jj ) + & |
---|
530 | & 2.0*htnew( ji ,jj+1) + 2.0*htnew( ji ,jj-1) + & |
---|
531 | & htnew(ji+1,jj+1) + htnew(ji+1,jj-1) + & |
---|
532 | & htnew(ji-1,jj+1) + htnew(ji-1,jj-1) |
---|
533 | |
---|
534 | nb(ji,jj) = 4 * iwork( ji , jj ) + & |
---|
535 | & 2 * iwork(ji+1, jj ) + 2 * iwork(ji-1, jj ) + & |
---|
536 | & 2 * iwork( ji ,jj+1) + 2 * iwork( ji ,jj-1) + & |
---|
537 | & iwork(ji+1,jj+1) + iwork(ji+1,jj-1) + & |
---|
538 | & iwork(ji-1,jj+1) + iwork(ji-1,jj-1) |
---|
539 | END DO |
---|
540 | END DO |
---|
541 | |
---|
542 | ELSE |
---|
543 | |
---|
544 | !! Apply simple 9-point averaging in determining work from htnew |
---|
545 | DO jj=2,jpj-1 |
---|
546 | DO ji=2,jpi-1 |
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547 | work(ji,jj) = htnew( ji , jj ) + & |
---|
548 | & htnew(ji+1, jj ) + htnew(ji-1, jj ) + & |
---|
549 | & htnew( ji ,jj+1) + htnew( ji ,jj-1) + & |
---|
550 | & htnew(ji+1,jj+1) + htnew(ji+1,jj-1) + & |
---|
551 | & htnew(ji-1,jj+1) + htnew(ji-1,jj-1) |
---|
552 | |
---|
553 | nb(ji,jj) = iwork( ji , jj ) + & |
---|
554 | & iwork(ji+1, jj ) + iwork(ji-1, jj ) + & |
---|
555 | & iwork( ji ,jj+1) + iwork( ji ,jj-1) + & |
---|
556 | & iwork(ji+1,jj+1) + iwork(ji+1,jj-1) + & |
---|
557 | & iwork(ji-1,jj+1) + iwork(ji-1,jj-1) |
---|
558 | END DO |
---|
559 | END DO |
---|
560 | |
---|
561 | ENDIF |
---|
562 | |
---|
563 | !! write averaged value of work into htnew, |
---|
564 | !! if average is valid and point is unmasked |
---|
565 | WHERE( (htold(:,:) /= 0.0_wp ) .AND. ( nb(:,:) /= 0 ) ) |
---|
566 | htnew(:,:) = work(:,:)/real(nb(:,:)) |
---|
567 | ELSEWHERE |
---|
568 | htnew(:,:) = 0.0_wp |
---|
569 | END WHERE |
---|
570 | |
---|
571 | !! Deallocate temporary workspace arrays, all local to this routine |
---|
572 | CALL wrk_dealloc( jpi, jpj, nb, iwork ) |
---|
573 | CALL wrk_dealloc( jpi, jpj, work ) |
---|
574 | ! |
---|
575 | END SUBROUTINE dyn_nept_smooth_vel |
---|
576 | |
---|
577 | !!============================================================================== |
---|
578 | END MODULE dynnept |
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