1 | !!---------------------------------------------------------------------- |
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2 | !! *** dtasal_fdir *** |
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3 | !!---------------------------------------------------------------------- |
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4 | !! dta_sal : read monthly salinity data in direct access file |
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5 | !!---------------------------------------------------------------------- |
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6 | !! OPA 9.0 , LODYC-IPSL (2003) |
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7 | !!---------------------------------------------------------------------- |
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8 | |
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9 | SUBROUTINE dta_sal( kt ) |
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10 | !!---------------------------------------------------------------------- |
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11 | !! *** ROUTINE dta_sal *** |
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12 | !! |
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13 | !! ** Purpose : Reads monthly salinity data |
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14 | !! |
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15 | !! ** Method : Direct acces file case |
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16 | !! Read on unit numsdt the interpolated Levitus salinity onto |
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17 | !! the global grid. |
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18 | !! The value is centered at the middle of month. |
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19 | !! At each time step, a linear interpolation is applied between |
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20 | !! two monthly values. |
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21 | !! |
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22 | !! History : |
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23 | !! ! 91-03 () Original code |
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24 | !! ! 92-07 (M. Imbard) |
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25 | !! 8.5 ! 02-06 (G. Madec) F90: Free form and module |
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26 | !!---------------------------------------------------------------------- |
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27 | !! * Arguments |
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28 | INTEGER, INTENT(in) :: kt ! ocean time step |
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29 | |
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30 | !! * Local declarations |
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31 | INTEGER ,PARAMETER :: jpmois= 12 & ! number on month in file |
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32 | & ,jpf = 1 ! number of fields |
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33 | INTEGER :: ji,jj,jk,jl,ios, ik |
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34 | INTEGER :: imois,iman |
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35 | INTEGER :: iimlu,ijmlu,ikmlu,ilmlu,immlu |
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36 | INTEGER :: i15, ibloc, ilindta |
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37 | REAL(wp) :: zxy, zl |
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38 | CHARACTER (len=20) :: cltit |
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39 | !!---------------------------------------------------------------------- |
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40 | |
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41 | |
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42 | ! 0. Initialization |
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43 | ! ----------------- |
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44 | |
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45 | iman = jpmois |
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46 | i15 = nday/16 |
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47 | |
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48 | imois = nmonth + i15 - 1 |
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49 | IF( imois == 0 ) imois = iman |
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50 | |
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51 | |
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52 | ! 1. First call kt=nit000 |
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53 | ! ----------------------- |
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54 | |
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55 | IF( kt == nit000 .AND. nlecsa == 0 ) THEN |
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56 | ! open sal.dta file |
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57 | ibloc = 4096 |
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58 | ilindta = ibloc*((jpidta*jpjdta*jpbytda-1 )/ibloc+1) |
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59 | CALL ctlopn(numsdt,'data_1m_salinity_nomask','OLD', 'UNFORMATTED', 'DIRECT', & |
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60 | ilindta,numout,lwp,1) |
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61 | nsal1 = 0 |
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62 | IF(lwp) THEN |
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63 | WRITE(numout,*) |
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64 | WRITE(numout,*) 'dta_sal : read monthly salinity in direct acces file in unit= ', numsdt |
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65 | WRITE(numout,*) '~~~~~~~ ' |
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66 | WRITE(numout,*) |
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67 | ENDIF |
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68 | |
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69 | ! 1.2 Read first records |
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70 | |
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71 | ! title, dimensions and tests |
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72 | |
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73 | READ (numsdt,REC=1,IOSTAT=ios) cltit, iimlu, ijmlu, ikmlu, & |
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74 | ilmlu, immlu |
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75 | IF( ios /= 0 ) THEN |
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76 | IF(lwp) WRITE(numout,*) 'e r r o r read numsdt ',ios |
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77 | STOP 'dtasal' |
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78 | ELSE |
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79 | IF ( iimlu /= jpidta ) STOP 4050 |
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80 | IF ( ijmlu /= jpjdta ) STOP 4060 |
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81 | IF ( ikmlu /= jpk ) STOP 4070 |
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82 | IF ( ilmlu /= jpmois ) STOP 4080 |
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83 | IF ( immlu /= jpf ) STOP 4090 |
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84 | IF(lwp) WRITE(numout,*) 'nb of points in the 5 directions ' |
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85 | IF(lwp) WRITE(numout,*) iimlu, ijmlu, ikmlu, ilmlu, immlu |
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86 | ENDIF |
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87 | |
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88 | ENDIF |
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89 | |
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90 | |
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91 | ! 2. Read monthly file |
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92 | ! ------------------- |
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93 | |
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94 | IF( ( kt == nit000 .AND. nlecsa == 0 ) .OR. imois /= nsal1 ) THEN |
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95 | nlecsa = 1 |
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96 | |
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97 | ! 2.1 Calendar computation |
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98 | |
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99 | nsal1 = imois ! first file record used |
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100 | nsal2 = nsal1 + 1 ! last file record used |
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101 | nsal1 = MOD( nsal1, iman ) |
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102 | IF( nsal1 == 0 ) nsal1 = iman |
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103 | nsal2 = MOD( nsal2, iman ) |
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104 | IF( nsal2 == 0 ) nsal2 = iman |
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105 | IF(lwp) WRITE(numout,*) 'first record file used nsal1 ', nsal1 |
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106 | IF(lwp) WRITE(numout,*) 'last record file used nsal2 ', nsal2 |
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107 | |
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108 | ! 2.3 Read monthly salinity data Levitus |
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109 | |
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110 | CALL read3d(numsdt,saldta(1,1,1,1),nsal1+1) |
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111 | CALL read3d(numsdt,saldta(1,1,1,2),nsal2+1) |
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112 | |
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113 | IF(lwp) THEN |
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114 | WRITE(numout,*) |
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115 | WRITE(numout,*) ' read Levitus salinity ok' |
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116 | WRITE(numout,*) |
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117 | ENDIF |
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118 | |
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119 | ! 2.4 Masks |
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120 | |
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121 | DO jl = 1, 2 |
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122 | saldta(:,:,:,jl) = saldta(:,:,:,jl)*tmask(:,:,:) |
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123 | saldta(:,:,jpk,jl) = 0. |
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124 | IF( lk_zps ) THEN ! z-coordinate with partial steps |
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125 | DO jj = 1, jpj ! interpolation of salinity at the last ocean level (i.e. the partial step) |
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126 | DO ji = 1, jpi |
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127 | ik = mbathy(ji,jj) - 1 |
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128 | IF( ik > 2 ) THEN |
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129 | zl = ( gdept(ik) - fsdept(ji,jj,ik) ) / ( gdept(ik) - gdept(ik-1) ) |
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130 | saldta(ji,jj,ik,jl) = (1.-zl) * saldta(ji,jj,ik,jl) +zl * saldta(ji,jj,ik-1,jl) |
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131 | ENDIF |
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132 | END DO |
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133 | END DO |
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134 | ENDIF |
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135 | END DO |
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136 | |
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137 | IF(lwp) THEN |
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138 | WRITE(numout,*)' salinity Levitus month ',nsal1,nsal2 |
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139 | WRITE(numout,*) |
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140 | WRITE(numout,*) ' Levitus mounth = ',nsal1,' level = 1' |
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141 | CALL prihre(saldta(1,1,1,1),jpi,jpj,1,jpi,20,1,jpj,20,1.,numout) |
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142 | WRITE(numout,*) ' Levitus mounth = ',nsal1,' level = ',jpk/2 |
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143 | CALL prihre(saldta(1,1,jpk/2,1),jpi,jpj,1,jpi,20,1,jpj,20,1.,numout) |
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144 | WRITE(numout,*) ' Levitus mounth = ',nsal1,' level = ',jpkm1 |
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145 | CALL prihre(saldta(1,1,jpkm1,1),jpi,jpj,1,jpi,20,1,jpj,20,1.,numout) |
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146 | ENDIF |
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147 | ENDIF |
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148 | |
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149 | |
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150 | ! 3. At every time step compute salinity data |
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151 | ! ---------------------------------------------- |
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152 | |
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153 | zxy = FLOAT(nday + 15 - 30*i15)/30. |
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154 | sdta(:,:,:)= ( (1.-zxy)*saldta(:,:,:,1) + zxy*saldta(:,:,:,2) ) |
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155 | |
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156 | END SUBROUTINE dta_sal |
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