1 | MODULE dyndmp |
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2 | !!====================================================================== |
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3 | !! *** MODULE dyndmp *** |
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4 | !! Ocean dynamics: internal restoring trend on momentum (U and V current) |
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5 | !! This should only be used for C1D case in current form |
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6 | !!====================================================================== |
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7 | !! History : 3.5 ! 2013-08 (D. Calvert) Original code |
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8 | !! 3.6 ! 2014-08 (T. Graham) Modified to use netcdf file of |
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9 | !! restoration coefficients supplied to tradmp |
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10 | !!---------------------------------------------------------------------- |
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11 | |
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12 | !!---------------------------------------------------------------------- |
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13 | !! dyn_dmp_alloc : allocate dyndmp arrays |
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14 | !! dyn_dmp_init : namelist read, parameter control and resto coeff. |
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15 | !! dyn_dmp : update the momentum trend with the internal damping |
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16 | !!---------------------------------------------------------------------- |
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17 | USE oce ! ocean: variables |
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18 | USE dom_oce ! ocean: domain variables |
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19 | USE c1d ! 1D vertical configuration |
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20 | USE tradmp ! ocean: internal damping |
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21 | USE zdf_oce ! ocean: vertical physics |
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22 | USE phycst ! physical constants |
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23 | USE dtauvd ! data: U & V current |
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24 | USE zdfmxl ! vertical physics: mixed layer depth |
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25 | ! |
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26 | USE in_out_manager ! I/O manager |
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27 | USE lib_mpp ! MPP library |
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28 | USE prtctl ! Print control |
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29 | USE timing ! Timing |
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30 | USE iom ! I/O manager |
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31 | |
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32 | IMPLICIT NONE |
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33 | PRIVATE |
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34 | |
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35 | PUBLIC dyn_dmp_init ! routine called by nemogcm.F90 |
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36 | PUBLIC dyn_dmp ! routine called by step_c1d.F90 |
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37 | |
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38 | LOGICAL, PUBLIC :: ln_dyndmp !: Flag for Newtonian damping |
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39 | |
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40 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: utrdmp !: damping U current trend (m/s2) |
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41 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: vtrdmp !: damping V current trend (m/s2) |
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42 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: resto_uv !: restoring coeff. on U & V current |
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43 | |
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44 | !! * Substitutions |
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45 | # include "vectopt_loop_substitute.h90" |
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46 | !!---------------------------------------------------------------------- |
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47 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
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48 | !! $Id$ |
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49 | !! Software governed by the CeCILL licence (./LICENSE) |
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50 | !!---------------------------------------------------------------------- |
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51 | CONTAINS |
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52 | |
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53 | INTEGER FUNCTION dyn_dmp_alloc() |
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54 | !!---------------------------------------------------------------------- |
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55 | !! *** FUNCTION dyn_dmp_alloc *** |
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56 | !!---------------------------------------------------------------------- |
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57 | ALLOCATE( utrdmp(jpi,jpj,jpk), vtrdmp(jpi,jpj,jpk), resto_uv(jpi,jpj,jpk), STAT= dyn_dmp_alloc ) |
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58 | ! |
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59 | IF( lk_mpp ) CALL mpp_sum ( dyn_dmp_alloc ) |
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60 | IF( dyn_dmp_alloc > 0 ) CALL ctl_warn('dyn_dmp_alloc: allocation of arrays failed') |
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61 | ! |
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62 | END FUNCTION dyn_dmp_alloc |
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63 | |
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64 | |
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65 | SUBROUTINE dyn_dmp_init |
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66 | !!---------------------------------------------------------------------- |
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67 | !! *** ROUTINE dyn_dmp_init *** |
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68 | !! |
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69 | !! ** Purpose : Initialization for the Newtonian damping |
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70 | !! |
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71 | !! ** Method : - read the ln_dyndmp parameter from the namc1d_dyndmp namelist |
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72 | !! - allocate damping arrays |
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73 | !! - check the parameters of the namtra_dmp namelist |
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74 | !! - calculate damping coefficient |
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75 | !!---------------------------------------------------------------------- |
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76 | INTEGER :: ios, imask ! local integers |
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77 | !! |
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78 | NAMELIST/namc1d_dyndmp/ ln_dyndmp |
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79 | !!---------------------------------------------------------------------- |
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80 | ! |
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81 | REWIND( numnam_ref ) ! Namelist namc1d_dyndmp in reference namelist : |
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82 | READ ( numnam_ref, namc1d_dyndmp, IOSTAT = ios, ERR = 901) |
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83 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namc1d_dyndmp in reference namelist', lwp ) |
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84 | REWIND( numnam_cfg ) ! Namelist namc1d_dyndmp in configuration namelist : Parameters of the run |
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85 | READ ( numnam_cfg, namc1d_dyndmp, IOSTAT = ios, ERR = 902 ) |
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86 | 902 IF( ios > 0 ) CALL ctl_nam ( ios , 'namc1d_dyndmp in configuration namelist', lwp ) |
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87 | IF(lwm) WRITE ( numond, namc1d_dyndmp ) |
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88 | ! |
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89 | IF(lwp) THEN ! control print |
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90 | WRITE(numout,*) |
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91 | WRITE(numout,*) 'dyn_dmp_init : U and V current Newtonian damping' |
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92 | WRITE(numout,*) '~~~~~~~~~~~~' |
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93 | WRITE(numout,*) ' Namelist namc1d_dyndmp : Set damping flag' |
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94 | WRITE(numout,*) ' add a damping term or not ln_dyndmp = ', ln_dyndmp |
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95 | WRITE(numout,*) ' Namelist namtra_dmp : Set damping parameters' |
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96 | WRITE(numout,*) ' Apply relaxation or not ln_tradmp = ', ln_tradmp |
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97 | WRITE(numout,*) ' mixed layer damping option nn_zdmp = ', nn_zdmp |
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98 | WRITE(numout,*) ' Damping file name cn_resto = ', cn_resto |
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99 | WRITE(numout,*) |
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100 | ENDIF |
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101 | ! |
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102 | IF( ln_dyndmp ) THEN |
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103 | ! !== allocate the data arrays ==! |
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104 | IF( dyn_dmp_alloc() /= 0 ) CALL ctl_stop( 'STOP', 'dyn_dmp_init: unable to allocate arrays' ) |
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105 | ! |
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106 | SELECT CASE ( nn_zdmp ) !== control print of vertical option ==! |
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107 | CASE ( 0 ) ; IF(lwp) WRITE(numout,*) ' momentum damping throughout the water column' |
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108 | CASE ( 1 ) ; IF(lwp) WRITE(numout,*) ' no momentum damping in the turbocline (avt > 5 cm2/s)' |
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109 | CASE ( 2 ) ; IF(lwp) WRITE(numout,*) ' no momentum damping in the mixed layer' |
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110 | CASE DEFAULT |
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111 | WRITE(ctmp1,*) ' bad flag value for nn_zdmp = ', nn_zdmp |
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112 | CALL ctl_stop(ctmp1) |
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113 | END SELECT |
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114 | ! |
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115 | IF( .NOT. ln_uvd_dyndmp ) THEN ! force the initialization of U & V current data for damping |
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116 | CALL ctl_warn( 'dyn_dmp_init: U & V current read data not initialized, we force ln_uvd_dyndmp=T' ) |
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117 | CALL dta_uvd_init( ld_dyndmp=ln_dyndmp ) |
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118 | ENDIF |
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119 | ! |
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120 | utrdmp(:,:,:) = 0._wp ! internal damping trends |
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121 | vtrdmp(:,:,:) = 0._wp |
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122 | ! |
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123 | !Read in mask from file |
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124 | CALL iom_open ( cn_resto, imask) |
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125 | CALL iom_get ( imask, jpdom_autoglo, 'resto', resto) |
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126 | CALL iom_close( imask ) |
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127 | ENDIF |
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128 | ! |
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129 | END SUBROUTINE dyn_dmp_init |
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130 | |
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131 | |
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132 | SUBROUTINE dyn_dmp( kt ) |
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133 | !!---------------------------------------------------------------------- |
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134 | !! *** ROUTINE dyn_dmp *** |
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135 | !! |
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136 | !! ** Purpose : Compute the momentum trends due to a newtonian damping |
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137 | !! of the ocean velocities towards the given data and add it to the |
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138 | !! general momentum trends. |
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139 | !! |
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140 | !! ** Method : Compute Newtonian damping towards u_dta and v_dta |
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141 | !! and add to the general momentum trends: |
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142 | !! ua = ua + resto_uv * (u_dta - ub) |
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143 | !! va = va + resto_uv * (v_dta - vb) |
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144 | !! The trend is computed either throughout the water column |
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145 | !! (nn_zdmp=0), where the vertical mixing is weak (nn_zdmp=1) or |
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146 | !! below the well mixed layer (nn_zdmp=2) |
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147 | !! |
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148 | !! ** Action : - (ua,va) momentum trends updated with the damping trend |
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149 | !!---------------------------------------------------------------------- |
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150 | INTEGER, INTENT(in) :: kt ! ocean time-step index |
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151 | !! |
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152 | INTEGER :: ji, jj, jk ! dummy loop indices |
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153 | REAL(wp) :: zua, zva ! local scalars |
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154 | REAL(wp), DIMENSION(jpi,jpj,jpk,2) :: zuv_dta ! Read in data |
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155 | !!---------------------------------------------------------------------- |
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156 | ! |
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157 | IF( ln_timing ) CALL timing_start( 'dyn_dmp' ) |
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158 | ! |
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159 | ! |
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160 | ! !== read and interpolate U & V current data at kt ==! |
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161 | CALL dta_uvd( kt, zuv_dta ) !!! NOTE: This subroutine must be altered for use outside |
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162 | !!! the C1D context (use of U,V grid variables) |
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163 | ! |
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164 | SELECT CASE ( nn_zdmp ) !== Calculate/add Newtonian damping to the momentum trend ==! |
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165 | ! |
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166 | CASE( 0 ) ! Newtonian damping throughout the water column |
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167 | DO jk = 1, jpkm1 |
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168 | DO jj = 2, jpjm1 |
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169 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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170 | zua = resto_uv(ji,jj,jk) * ( zuv_dta(ji,jj,jk,1) - ub(ji,jj,jk) ) |
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171 | zva = resto_uv(ji,jj,jk) * ( zuv_dta(ji,jj,jk,2) - vb(ji,jj,jk) ) |
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172 | ua(ji,jj,jk) = ua(ji,jj,jk) + zua |
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173 | va(ji,jj,jk) = va(ji,jj,jk) + zva |
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174 | utrdmp(ji,jj,jk) = zua ! save the trends |
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175 | vtrdmp(ji,jj,jk) = zva |
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176 | END DO |
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177 | END DO |
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178 | END DO |
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179 | ! |
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180 | CASE ( 1 ) ! no damping above the turbocline (avt > 5 cm2/s) |
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181 | DO jk = 1, jpkm1 |
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182 | DO jj = 2, jpjm1 |
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183 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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184 | IF( avt(ji,jj,jk) <= 5.e-4_wp ) THEN |
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185 | zua = resto_uv(ji,jj,jk) * ( zuv_dta(ji,jj,jk,1) - ub(ji,jj,jk) ) |
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186 | zva = resto_uv(ji,jj,jk) * ( zuv_dta(ji,jj,jk,2) - vb(ji,jj,jk) ) |
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187 | ELSE |
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188 | zua = 0._wp |
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189 | zva = 0._wp |
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190 | ENDIF |
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191 | ua(ji,jj,jk) = ua(ji,jj,jk) + zua |
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192 | va(ji,jj,jk) = va(ji,jj,jk) + zva |
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193 | utrdmp(ji,jj,jk) = zua ! save the trends |
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194 | vtrdmp(ji,jj,jk) = zva |
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195 | END DO |
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196 | END DO |
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197 | END DO |
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198 | ! |
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199 | CASE ( 2 ) ! no damping in the mixed layer |
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200 | DO jk = 1, jpkm1 |
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201 | DO jj = 2, jpjm1 |
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202 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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203 | IF( gdept_n(ji,jj,jk) >= hmlp (ji,jj) ) THEN |
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204 | zua = resto_uv(ji,jj,jk) * ( zuv_dta(ji,jj,jk,1) - ub(ji,jj,jk) ) |
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205 | zva = resto_uv(ji,jj,jk) * ( zuv_dta(ji,jj,jk,2) - vb(ji,jj,jk) ) |
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206 | ELSE |
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207 | zua = 0._wp |
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208 | zva = 0._wp |
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209 | ENDIF |
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210 | ua(ji,jj,jk) = ua(ji,jj,jk) + zua |
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211 | va(ji,jj,jk) = va(ji,jj,jk) + zva |
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212 | utrdmp(ji,jj,jk) = zua ! save the trends |
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213 | vtrdmp(ji,jj,jk) = zva |
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214 | END DO |
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215 | END DO |
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216 | END DO |
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217 | ! |
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218 | END SELECT |
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219 | ! |
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220 | ! ! Control print |
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221 | IF( ln_ctl ) CALL prt_ctl( tab3d_1=ua(:,:,:), clinfo1=' dmp - Ua: ', mask1=umask, & |
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222 | & tab3d_2=va(:,:,:), clinfo2= ' Va: ', mask2=vmask, clinfo3='dyn' ) |
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223 | ! |
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224 | ! |
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225 | IF( ln_timing ) CALL timing_stop( 'dyn_dmp') |
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226 | ! |
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227 | END SUBROUTINE dyn_dmp |
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228 | |
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229 | !!====================================================================== |
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230 | END MODULE dyndmp |
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