1 | MODULE icbini |
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2 | |
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3 | !!====================================================================== |
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4 | !! *** MODULE icbini *** |
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5 | !! Icebergs: initialise variables for iceberg tracking |
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6 | !!====================================================================== |
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7 | !! History : - ! 2010-01 (T. Martin & A. Adcroft) Original code |
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8 | !! 3.3 ! 2011-03 (G. Madec) Part conversion to NEMO form ; Removal of mapping from another grid |
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9 | !! - ! 2011-04 (S. Alderson) Split into separate modules ; Restore restart routines |
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10 | !! - ! 2011-05 (S. Alderson) generate_test_icebergs restored ; new forcing arrays with extra halo ; |
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11 | !! - ! north fold exchange arrays added |
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12 | !!---------------------------------------------------------------------- |
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13 | !!---------------------------------------------------------------------- |
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14 | !! icb_init : initialise icebergs |
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15 | !! icb_ini_gen : generate test icebergs |
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16 | !! icb_nam : read iceberg namelist |
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17 | !!---------------------------------------------------------------------- |
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18 | USE dom_oce ! ocean domain |
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19 | USE in_out_manager ! IO routines and numout in particular |
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20 | USE lib_mpp ! mpi library and lk_mpp in particular |
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21 | USE sbc_oce ! ocean: surface boundary condition |
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22 | USE iom ! IOM library |
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23 | USE fldread ! field read |
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24 | USE lbclnk ! lateral boundary condition - MPP link |
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25 | ! |
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26 | USE icb_oce ! define iceberg arrays |
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27 | USE icbutl ! iceberg utility routines |
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28 | USE icbrst ! iceberg restart routines |
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29 | USE icbtrj ! iceberg trajectory I/O routines |
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30 | USE icbdia ! iceberg budget routines |
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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 icb_init ! routine called in nemogcm.F90 module |
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36 | |
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37 | CHARACTER(len=100) :: cn_dir = './' ! Root directory for location of icb files |
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38 | TYPE(FLD_N) :: sn_icb ! information about the calving file to be read |
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39 | |
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40 | !!---------------------------------------------------------------------- |
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41 | !! NEMO/OPA 3.3 , NEMO Consortium (2011) |
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42 | !! $Id:$ |
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43 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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44 | !!---------------------------------------------------------------------- |
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45 | CONTAINS |
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46 | |
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47 | SUBROUTINE icb_init( pdt, kt ) |
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48 | !!---------------------------------------------------------------------- |
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49 | !! *** ROUTINE dom_init *** |
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50 | !! |
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51 | !! ** Purpose : iceberg initialization. |
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52 | !! |
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53 | !! ** Method : - blah blah |
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54 | !!---------------------------------------------------------------------- |
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55 | REAL(wp), INTENT(in) :: pdt ! iceberg time-step (rdt*nn_fsbc) |
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56 | INTEGER , INTENT(in) :: kt ! time step number |
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57 | ! |
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58 | INTEGER :: ji, jj, jn ! dummy loop indices |
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59 | INTEGER :: i1, i2, i3 ! local integers |
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60 | INTEGER :: ii, inum, ivar ! - - |
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61 | INTEGER :: istat1, istat2, istat3 ! - - |
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62 | CHARACTER(len=300) :: cl_sdist ! local character |
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63 | !!---------------------------------------------------------------------- |
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64 | ! |
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65 | CALL icb_nam ! Read and print namelist parameters |
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66 | ! |
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67 | IF( .NOT. ln_icebergs ) RETURN |
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68 | |
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69 | ! ! allocate gridded fields |
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70 | IF( icb_alloc() /= 0 ) CALL ctl_stop( 'STOP', 'icb_alloc : unable to allocate arrays' ) |
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71 | |
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72 | ! ! open ascii output file or files for iceberg status information |
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73 | ! ! note that we choose to do this on all processors since we cannot |
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74 | ! ! predict where icebergs will be ahead of time |
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75 | CALL ctl_opn( numicb, 'icebergs.stat', 'REPLACE', 'FORMATTED', 'SEQUENTIAL', -1, numout, lwp, narea ) |
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76 | |
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77 | ! set parameters (mostly from namelist) |
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78 | ! |
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79 | berg_dt = pdt |
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80 | first_width (:) = SQRT( rn_initial_mass(:) / ( rn_LoW_ratio * rn_rho_bergs * rn_initial_thickness(:) ) ) |
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81 | first_length(:) = rn_LoW_ratio * first_width(:) |
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82 | |
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83 | berg_grid%calving (:,:) = 0._wp |
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84 | berg_grid%calving_hflx (:,:) = 0._wp |
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85 | berg_grid%stored_heat (:,:) = 0._wp |
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86 | berg_grid%floating_melt(:,:) = 0._wp |
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87 | berg_grid%maxclass (:,:) = nclasses |
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88 | berg_grid%stored_ice (:,:,:) = 0._wp |
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89 | berg_grid%tmp (:,:) = 0._wp |
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90 | src_calving (:,:) = 0._wp |
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91 | src_calving_hflx (:,:) = 0._wp |
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92 | |
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93 | ! ! domain for icebergs |
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94 | IF( lk_mpp .AND. jpni == 1 ) CALL ctl_stop( 'icbinit: having ONE processor in x currently does not work' ) |
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95 | ! NB: the issue here is simply that cyclic east-west boundary condition have not been coded in mpp case |
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96 | ! for the north fold we work out which points communicate by asking |
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97 | ! lbc_lnk to pass processor number (valid even in single processor case) |
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98 | ! borrow src_calving arrays for this |
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99 | ! |
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100 | ! pack i and j together using a scaling of a power of 10 |
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101 | nicbpack = 10000 |
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102 | IF( jpiglo >= nicbpack ) CALL ctl_stop( 'icbini: processor index packing failure' ) |
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103 | nicbfldproc(:) = -1 |
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104 | |
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105 | DO jj = 1, jpj |
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106 | DO ji = 1, jpi |
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107 | src_calving_hflx(ji,jj) = narea |
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108 | src_calving (ji,jj) = nicbpack * (njmpp+jj-1) + nimpp+ji-1 !!gm use here mjg(jj) and mig(ji)... |
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109 | !!gm src_calving (ji,jj) = nicbpack * mjg(jj) + mig(ji) |
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110 | END DO |
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111 | END DO |
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112 | CALL lbc_lnk( src_calving_hflx, 'T', 1._wp ) |
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113 | CALL lbc_lnk( src_calving , 'T', 1._wp ) |
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114 | |
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115 | ! work out interior of processor from exchange array |
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116 | ! first entry with narea for this processor is left hand interior index |
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117 | ! last entry is right hand interior index |
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118 | jj = jpj/2 |
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119 | nicbdi = -1 |
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120 | nicbei = -1 |
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121 | DO ji = 1, jpi |
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122 | i3 = INT( src_calving(ji,jj) ) |
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123 | i2 = INT( i3/nicbpack ) |
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124 | i1 = i3 - i2*nicbpack |
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125 | i3 = INT( src_calving_hflx(ji,jj) ) |
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126 | IF( i1 == nimpp+ji-1 .AND. i3 == narea ) THEN |
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127 | IF( nicbdi < 0 ) THEN ; nicbdi = ji |
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128 | ELSE ; nicbei = ji |
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129 | ENDIF |
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130 | ENDIF |
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131 | END DO |
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132 | ! |
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133 | ! repeat for j direction |
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134 | ji = jpi/2 |
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135 | nicbdj = -1 |
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136 | nicbej = -1 |
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137 | DO jj = 1, jpj |
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138 | i3 = INT( src_calving(ji,jj) ) |
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139 | i2 = INT( i3/nicbpack ) |
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140 | i1 = i3 - i2*nicbpack |
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141 | i3 = INT( src_calving_hflx(ji,jj) ) |
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142 | IF( i2 == njmpp+jj-1 .AND. i3 == narea ) THEN |
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143 | IF( nicbdj < 0 ) THEN ; nicbdj = jj |
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144 | ELSE ; nicbej = jj |
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145 | ENDIF |
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146 | ENDIF |
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147 | END DO |
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148 | ! |
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149 | ! special for east-west boundary exchange we save the destination index |
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150 | i1 = MAX( nicbdi-1, 1) |
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151 | i3 = INT( src_calving(i1,jpj/2) ) |
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152 | jj = INT( i3/nicbpack ) |
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153 | ricb_left = REAL( i3 - nicbpack*jj, wp ) |
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154 | i1 = MIN( nicbei+1, jpi ) |
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155 | i3 = INT( src_calving(i1,jpj/2) ) |
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156 | jj = INT( i3/nicbpack ) |
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157 | ricb_right = REAL( i3 - nicbpack*jj, wp ) |
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158 | |
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159 | ! north fold |
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160 | IF( npolj > 0 ) THEN |
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161 | ! |
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162 | ! icebergs in row nicbej+1 get passed across fold |
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163 | nicbfldpts(:) = INT( src_calving(:,nicbej+1) ) |
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164 | nicbflddest(:) = INT( src_calving_hflx(:,nicbej+1) ) |
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165 | ! |
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166 | ! work out list of unique processors to talk to |
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167 | DO ji = nicbdi, nicbei |
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168 | ii = nicbflddest(ji) |
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169 | DO jn = 1, jpni |
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170 | IF( nicbfldproc(jn) == -1 ) THEN |
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171 | nicbfldproc(jn) = ii |
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172 | EXIT !!gm EXIT should be avoided: use DO WHILE expression instead |
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173 | ENDIF |
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174 | IF( nicbfldproc(jn) == ii ) EXIT |
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175 | END DO |
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176 | END DO |
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177 | ENDIF |
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178 | ! |
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179 | IF( nn_verbose_level > 0) THEN |
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180 | WRITE(numicb,*) 'processor ', narea |
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181 | WRITE(numicb,*) 'jpi, jpj ', jpi, jpj |
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182 | WRITE(numicb,*) 'nldi, nlei ', nldi, nlei |
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183 | WRITE(numicb,*) 'nldj, nlej ', nldj, nlej |
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184 | WRITE(numicb,*) 'berg i interior ', nicbdi, nicbei |
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185 | WRITE(numicb,*) 'berg j interior ', nicbdj, nicbej |
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186 | WRITE(numicb,*) 'berg left ', ricb_left |
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187 | WRITE(numicb,*) 'berg right ', ricb_right |
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188 | jj = jpj/2 |
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189 | WRITE(numicb,*) "central j line:" |
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190 | WRITE(numicb,*) "i processor" |
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191 | WRITE(numicb,*) (INT(src_calving_hflx(ji,jj)), ji=1,jpi) |
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192 | WRITE(numicb,*) "i point" |
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193 | WRITE(numicb,*) (INT(src_calving(ji,jj)), ji=1,jpi) |
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194 | ji = jpi/2 |
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195 | WRITE(numicb,*) "central i line:" |
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196 | WRITE(numicb,*) "j processor" |
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197 | WRITE(numicb,*) (INT(src_calving_hflx(ji,jj)), jj=1,jpj) |
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198 | WRITE(numicb,*) "j point" |
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199 | WRITE(numicb,*) (INT(src_calving(ji,jj)), jj=1,jpj) |
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200 | IF( npolj > 0 ) THEN |
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201 | WRITE(numicb,*) 'north fold destination points ' |
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202 | WRITE(numicb,*) nicbfldpts |
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203 | WRITE(numicb,*) 'north fold destination procs ' |
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204 | WRITE(numicb,*) nicbflddest |
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205 | ENDIF |
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206 | CALL flush(numicb) |
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207 | ENDIF |
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208 | |
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209 | src_calving (:,:) = 0._wp |
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210 | src_calving_hflx(:,:) = 0._wp |
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211 | |
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212 | ! assign each new iceberg with a unique number constructed from the processor number |
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213 | ! and incremented by the total number of processors |
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214 | num_bergs(:) = 0 |
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215 | num_bergs(1) = narea - jpnij |
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216 | |
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217 | ! when not generating test icebergs we need to setup calving file |
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218 | IF( nn_test_icebergs < 0 ) THEN |
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219 | ! |
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220 | ! maximum distribution class array does not change in time so read it once |
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221 | cl_sdist = TRIM( cn_dir )//TRIM( sn_icb%clname ) |
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222 | CALL iom_open ( cl_sdist, inum ) ! open file |
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223 | ivar = iom_varid( inum, 'maxclass', ldstop=.FALSE. ) |
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224 | IF( ivar > 0 ) THEN |
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225 | CALL iom_get ( inum, jpdom_data, 'maxclass', src_calving ) ! read the max distribution array |
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226 | berg_grid%maxclass(:,:) = INT( src_calving ) |
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227 | src_calving(:,:) = 0._wp |
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228 | ENDIF |
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229 | CALL iom_close( inum ) ! close file |
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230 | ! |
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231 | WRITE(numicb,*) |
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232 | WRITE(numicb,*) ' calving read in a file' |
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233 | ALLOCATE( sf_icb(1), STAT=istat1 ) ! Create sf_icb structure (calving) |
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234 | ALLOCATE( sf_icb(1)%fnow(jpi,jpj,1), STAT=istat2 ) |
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235 | ALLOCATE( sf_icb(1)%fdta(jpi,jpj,1,2), STAT=istat3 ) |
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236 | IF( istat1+istat2+istat3 > 0 ) THEN |
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237 | CALL ctl_stop( 'sbc_icb: unable to allocate sf_icb structure' ) ; RETURN |
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238 | ENDIF |
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239 | ! ! fill sf_icb with the namelist (sn_icb) and control print |
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240 | CALL fld_fill( sf_icb, (/ sn_icb /), cn_dir, 'icb_init', 'read calving data', 'namicb' ) |
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241 | ! |
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242 | ENDIF |
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243 | |
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244 | IF( .NOT.ln_rstart ) THEN |
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245 | IF( nn_test_icebergs > 0 ) CALL icb_ini_gen() |
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246 | ELSE |
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247 | IF( nn_test_icebergs > 0 ) THEN |
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248 | CALL icb_ini_gen() |
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249 | ELSE |
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250 | CALL icb_rst_read() |
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251 | l_restarted_bergs = .TRUE. |
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252 | ENDIF |
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253 | ENDIF |
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254 | ! |
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255 | IF( nn_sample_rate .GT. 0 ) CALL icb_trj_init( nitend ) |
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256 | ! |
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257 | CALL icb_dia_init() |
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258 | ! |
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259 | IF( nn_verbose_level >= 2 ) CALL icb_utl_print('icb_init, initial status', nit000-1) |
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260 | ! |
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261 | END SUBROUTINE icb_init |
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262 | |
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263 | SUBROUTINE icb_ini_gen() |
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264 | !!---------------------------------------------------------------------- |
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265 | !! *** ROUTINE icb_ini_gen *** |
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266 | !! |
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267 | !! ** Purpose : iceberg generation |
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268 | !! |
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269 | !! ** Method : - at each grid point of the test box supplied in the namelist |
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270 | !! generate an iceberg in one class determined by the value of |
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271 | !! parameter nn_test_icebergs |
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272 | !!---------------------------------------------------------------------- |
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273 | INTEGER :: ji, jj, ibergs |
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274 | TYPE(iceberg) :: localberg ! NOT a pointer but an actual local variable |
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275 | TYPE(point) :: localpt |
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276 | INTEGER :: iyr, imon, iday, ihr, imin, isec |
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277 | INTEGER :: iberg |
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278 | !!---------------------------------------------------------------------- |
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279 | |
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280 | ! For convenience |
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281 | iberg = nn_test_icebergs |
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282 | |
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283 | ! call get_date(Time, iyr, imon, iday, ihr, imin, isec) |
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284 | ! Convert nemo time variables from dom_oce into local versions |
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285 | iyr = nyear |
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286 | imon = nmonth |
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287 | iday = nday |
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288 | ihr = INT(nsec_day/3600) |
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289 | imin = INT((nsec_day-ihr*3600)/60) |
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290 | isec = nsec_day - ihr*3600 - imin*60 |
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291 | |
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292 | ! no overlap for icebergs since we want only one instance of each across the whole domain |
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293 | ! so restrict area of interest |
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294 | ! use tmask here because tmask_i has been doctored on one side of the north fold line |
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295 | |
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296 | DO jj = nicbdj, nicbej |
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297 | DO ji = nicbdi, nicbei |
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298 | IF( tmask(ji,jj,1) > 0._wp .AND. & |
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299 | rn_test_box(1) < glamt(ji,jj) .AND. glamt(ji,jj) < rn_test_box(2) .AND. & |
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300 | rn_test_box(3) < gphit(ji,jj) .AND. gphit(ji,jj) < rn_test_box(4) ) THEN |
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301 | localberg%mass_scaling = rn_mass_scaling(iberg) |
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302 | localpt%xi = REAL( nimpp+ji-1, wp ) |
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303 | localpt%yj = REAL( njmpp+jj-1, wp ) |
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304 | localpt%lon = icb_utl_bilin(glamt, localpt%xi, localpt%yj, 'T', 0, 0 ) |
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305 | localpt%lat = icb_utl_bilin(gphit, localpt%xi, localpt%yj, 'T', 0, 0 ) |
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306 | localpt%mass = rn_initial_mass (iberg) |
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307 | localpt%thickness = rn_initial_thickness(iberg) |
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308 | localpt%width = first_width (iberg) |
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309 | localpt%length = first_length(iberg) |
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310 | localpt%year = iyr |
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311 | localpt%day = FLOAT(iday)+(FLOAT(ihr)+FLOAT(imin)/60._wp)/24._wp |
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312 | localpt%mass_of_bits = 0._wp |
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313 | localpt%heat_density = 0._wp |
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314 | localpt%uvel = 0._wp |
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315 | localpt%vvel = 0._wp |
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316 | CALL icb_utl_incr() |
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317 | localberg%number(:) = num_bergs(:) |
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318 | call icb_utl_add(localberg, localpt) |
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319 | ENDIF |
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320 | END DO |
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321 | END DO |
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322 | ! |
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323 | ibergs = icb_utl_count() |
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324 | IF( lk_mpp ) CALL mpp_sum(ibergs) |
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325 | WRITE(numicb,'(a,i6,a)') 'diamonds, icb_ini_gen: ',ibergs,' were generated' |
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326 | ! |
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327 | END SUBROUTINE icb_ini_gen |
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328 | |
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329 | SUBROUTINE icb_nam |
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330 | !!---------------------------------------------------------------------- |
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331 | !! *** ROUTINE icb_nam *** |
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332 | !! |
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333 | !! ** Purpose : read iceberg namelist and print the variables. |
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334 | !! |
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335 | !! ** input : - namberg namelist |
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336 | !!---------------------------------------------------------------------- |
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337 | INTEGER :: jn ! dummy loop indices |
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338 | REAL(wp) :: zfact ! local scalar |
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339 | ! |
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340 | NAMELIST/namberg/ ln_icebergs , ln_bergdia , nn_sample_rate , rn_initial_mass , & |
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341 | & rn_distribution, rn_mass_scaling, rn_initial_thickness, nn_verbose_write , & |
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342 | & rn_rho_bergs , rn_LoW_ratio , nn_verbose_level , ln_operator_splitting, & |
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343 | & rn_bits_erosion_fraction , rn_sicn_shift , ln_passive_mode , & |
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344 | & ln_time_average_weight , nn_test_icebergs , rn_test_box , & |
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345 | & rn_speed_limit , cn_dir, sn_icb |
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346 | !!---------------------------------------------------------------------- |
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347 | |
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348 | ! (NB: frequency positive => hours, negative => months) |
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349 | ! ! file ! frequency ! variable ! time intep ! clim ! 'yearly' or ! weights ! rotation ! |
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350 | ! ! name ! (hours) ! name ! (T/F) ! (T/F) ! 'monthly' ! filename ! pairs ! |
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351 | sn_icb = FLD_N( 'calving' , -1 , 'calving' , .TRUE. , .TRUE. , 'yearly' , '' , '' ) |
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352 | |
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353 | REWIND( numnam ) ! Namelist namrun : iceberg parameters |
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354 | READ ( numnam, namberg ) |
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355 | |
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356 | !!gm bug here in mpp : the return instruction will be done only on the 1st processor (lwp=True) |
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357 | ! IF( .NOT. ln_icebergs .AND. lwp ) THEN |
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358 | ! WRITE(numout,*) |
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359 | ! WRITE(numout,*) 'icb_nam : iceberg initialization through namberg namelist read' |
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360 | ! WRITE(numout,*) '~~~~~~~~ ' |
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361 | ! WRITE(numout,*) 'NO icebergs used' |
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362 | ! RETURN |
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363 | ! ENDIF |
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364 | !!gm solution: |
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365 | |
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366 | IF( .NOT. ln_icebergs ) THEN ! no icebergs |
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367 | IF(lwp) THEN |
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368 | WRITE(numout,*) |
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369 | WRITE(numout,*) 'icb_nam : ln_icebergs = F , NO icebergs used' |
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370 | WRITE(numout,*) '~~~~~~~~ ' |
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371 | ENDIF |
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372 | RETURN |
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373 | ENDIF |
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374 | !!gm end |
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375 | |
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376 | IF( nn_test_icebergs > nclasses ) THEN |
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377 | IF(lwp) WRITE(numout,*) 'Resetting nn_test_icebergs to ', nclasses |
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378 | nn_test_icebergs = nclasses |
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379 | ENDIF |
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380 | |
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381 | zfact = SUM( rn_distribution ) |
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382 | IF( zfact < 1._wp ) THEN |
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383 | IF( zfact <= 0._wp ) THEN |
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384 | CALL ctl_stop( 'icb_nam: sum of berg distribution equal to zero' ) |
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385 | ELSE |
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386 | rn_distribution(:) = rn_distribution(:) / zfact |
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387 | CALL ctl_warn( 'icb_nam: sum of berg input distribution not equal to one and so RESCALED' ) |
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388 | ENDIF |
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389 | ENDIF |
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390 | |
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391 | IF(lwp) THEN ! control print |
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392 | WRITE(numout,*) |
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393 | WRITE(numout,*) 'icb_nam : iceberg initialization through namberg namelist read' |
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394 | WRITE(numout,*) '~~~~~~~~ ' |
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395 | WRITE(numout,*) ' Calculate budgets ln_bergdia = ', ln_bergdia |
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396 | WRITE(numout,*) ' Period between sampling of position for trajectory storage nn_sample_rate = ', nn_sample_rate |
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397 | WRITE(numout,*) ' Mass thresholds between iceberg classes (kg) rn_initial_mass =' |
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398 | DO jn=1,nclasses |
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399 | WRITE(numout,'(a,f15.2)') ' ',rn_initial_mass(jn) |
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400 | ENDDO |
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401 | WRITE(numout,*) ' Fraction of calving to apply to this class (non-dim) rn_distribution =' |
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402 | DO jn = 1, nclasses |
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403 | WRITE(numout,'(a,f10.2)') ' ',rn_distribution(jn) |
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404 | END DO |
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405 | WRITE(numout,*) ' Ratio between effective and real iceberg mass (non-dim) rn_mass_scaling = ' |
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406 | DO jn = 1, nclasses |
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407 | WRITE(numout,'(a,f10.2)') ' ',rn_mass_scaling(jn) |
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408 | END DO |
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409 | WRITE(numout,*) ' Total thickness of newly calved bergs (m) rn_initial_thickness = ' |
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410 | DO jn = 1, nclasses |
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411 | WRITE(numout,'(a,f10.2)') ' ',rn_initial_thickness(jn) |
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412 | END DO |
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413 | WRITE(numout,*) ' Timesteps between verbose messages nn_verbose_write = ', nn_verbose_write |
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414 | |
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415 | WRITE(numout,*) ' Density of icebergs rn_rho_bergs = ', rn_rho_bergs |
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416 | WRITE(numout,*) ' Initial ratio L/W for newly calved icebergs rn_LoW_ratio = ', rn_LoW_ratio |
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417 | WRITE(numout,*) ' Turn on more verbose output level = ', nn_verbose_level |
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418 | WRITE(numout,*) ' Use first order operator splitting for thermodynamics ', & |
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419 | & 'use_operator_splitting = ', ln_operator_splitting |
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420 | WRITE(numout,*) ' Fraction of erosion melt flux to divert to bergy bits ', & |
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421 | & 'bits_erosion_fraction = ', rn_bits_erosion_fraction |
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422 | |
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423 | WRITE(numout,*) ' Shift of sea-ice concentration in erosion flux modulation ', & |
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424 | & '(0<sicn_shift<1) rn_sicn_shift = ', rn_sicn_shift |
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425 | WRITE(numout,*) ' Do not add freshwater flux from icebergs to ocean ', & |
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426 | & ' passive_mode = ', ln_passive_mode |
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427 | WRITE(numout,*) ' Time average the weight on the ocean time_average_weight = ', ln_time_average_weight |
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428 | WRITE(numout,*) ' Create icebergs in absence of a restart file nn_test_icebergs = ', nn_test_icebergs |
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429 | WRITE(numout,*) ' in lon/lat box = ', rn_test_box |
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430 | WRITE(numout,*) ' CFL speed limit for a berg speed_limit = ', rn_speed_limit |
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431 | WRITE(numout,*) ' Writing Iceberg status information to icebergs.stat file ' |
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432 | ENDIF |
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433 | ! |
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434 | END SUBROUTINE icb_nam |
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435 | |
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436 | !!====================================================================== |
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437 | |
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438 | END MODULE icbini |
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