1 | MODULE p4zsink2 |
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2 | !!====================================================================== |
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3 | !! *** MODULE p4zsink2 *** |
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4 | !! TOP : PISCES Compute vertical flux of particulate matter due to gravitational sinking |
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5 | !!====================================================================== |
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6 | !! History : 1.0 ! 2004 (O. Aumont) Original code |
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7 | !! 2.0 ! 2007-12 (C. Ethe, G. Madec) F90 |
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8 | !!---------------------------------------------------------------------- |
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9 | #if defined key_pisces |
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10 | !!---------------------------------------------------------------------- |
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11 | !! 'key_pisces' PISCES bio-model |
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12 | !!---------------------------------------------------------------------- |
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13 | !! p4z_sink2 : Compute vertical flux of particulate matter due to gravitational sinking |
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14 | !!---------------------------------------------------------------------- |
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15 | USE oce_trc ! |
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16 | USE trp_trc |
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17 | USE sms |
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18 | |
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19 | IMPLICIT NONE |
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20 | PRIVATE |
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21 | |
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22 | PUBLIC p4z_sink2 ! called in p4zbio.F90 |
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23 | |
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24 | !!* Substitution |
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25 | # include "domzgr_substitute.h90" |
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26 | !!---------------------------------------------------------------------- |
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27 | !! NEMO/TOP 2.0 , LOCEAN-IPSL (2007) |
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28 | !! $Header:$ |
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29 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
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30 | !!---------------------------------------------------------------------- |
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31 | |
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32 | CONTAINS |
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33 | |
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34 | SUBROUTINE p4z_sink2( wstmp, sinktemp, jn ) |
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35 | !!--------------------------------------------------------------------- |
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36 | !! *** ROUTINE p4z_sink2 *** |
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37 | !! |
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38 | !! ** Purpose : Compute the sedimentation terms for the various sinking |
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39 | !! particles. The scheme used to compute the trends is based |
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40 | !! on MUSCL. |
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41 | !! |
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42 | !! ** Method : - this ROUTINE compute not exactly the advection but the |
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43 | !! transport term, i.e. div(u*tra). |
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44 | !!--------------------------------------------------------------------- |
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45 | INTEGER , INTENT(in ) :: jn ! tracer index index |
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46 | REAL(wp), INTENT(in ), DIMENSION(jpi,jpj,jpk) :: wstmp ! ??? |
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47 | REAL(wp), INTENT(inout), DIMENSION(jpi,jpj,jpk) :: sinktemp ! ??? |
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48 | !! |
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49 | INTEGER :: ji, jj, jk, jnt |
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50 | REAL(wp) :: zigma,zew,zstep,zign |
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51 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: ztraz, zakz |
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52 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: zkz , zwstmp2 |
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53 | !!--------------------------------------------------------------------- |
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54 | |
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55 | zstep = rfact2 / 2. |
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56 | |
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57 | ztraz(:,:,:) = 0.e0 |
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58 | zkz (:,:,:) = 0.e0 |
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59 | zakz (:,:,:) = 0.e0 |
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60 | |
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61 | DO jk = 1, jpkm1 |
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62 | # if defined key_off_degrad |
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63 | zwstmp2(:,:,jk+1)=-wstmp(:,:,jk)/rjjss*tmask(:,:,jk+1)*facvol(:,:,jk) |
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64 | # else |
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65 | zwstmp2(:,:,jk+1)=-wstmp(:,:,jk)/rjjss*tmask(:,:,jk+1) |
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66 | |
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67 | # endif |
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68 | END DO |
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69 | |
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70 | zwstmp2(:,:,1) = 0.e0 |
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71 | ! |
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72 | ! Vertical advective flux |
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73 | !------------------------------- |
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74 | |
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75 | DO jnt = 1, 2 |
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76 | |
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77 | ! ... first guess of the slopes interior values |
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78 | |
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79 | DO jk = 2, jpkm1 |
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80 | ztraz(:,:,jk) = (trn(:,:,jk-1,jn) - trn(:,:,jk,jn)) *tmask(:,:,jk) |
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81 | END DO |
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82 | |
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83 | ztraz(:,:,1 ) = 0.0 |
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84 | ztraz(:,:,jpk) = 0.0 |
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85 | ! |
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86 | ! slopes |
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87 | DO jk=2,jpkm1 |
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88 | DO jj = 1,jpj |
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89 | DO ji = 1, jpi |
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90 | zign = 0.25 + SIGN( 0.25,ztraz(ji,jj,jk)*ztraz(ji,jj,jk+1) ) |
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91 | zakz(ji,jj,jk) = (ztraz(ji,jj,jk) + ztraz(ji,jj,jk+1) ) * zign |
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92 | END DO |
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93 | END DO |
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94 | END DO |
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95 | ! |
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96 | ! Slopes limitation |
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97 | DO jk = 2, jpkm1 |
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98 | DO jj = 1, jpj |
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99 | DO ji = 1, jpi |
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100 | zakz(ji,jj,jk) = SIGN(1.,zakz(ji,jj,jk)) * & |
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101 | & MIN(ABS(zakz(ji,jj,jk)), & |
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102 | & 2.*ABS(ztraz(ji,jj,jk+1)), & |
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103 | & 2.*ABS(ztraz(ji,jj,jk))) |
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104 | END DO |
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105 | END DO |
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106 | END DO |
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107 | |
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108 | ! vertical advective flux |
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109 | DO jk = 1, jpkm1 |
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110 | DO jj = 1, jpj |
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111 | DO ji = 1, jpi |
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112 | zigma = zwstmp2(ji,jj,jk+1)*zstep/fse3w(ji,jj,jk+1) |
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113 | zew = zwstmp2(ji,jj,jk+1) |
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114 | sinktemp(ji,jj,jk+1) = -zew*(trn(ji,jj,jk,jn) & |
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115 | & -0.5*(1+zigma)*zakz(ji,jj,jk))*zstep |
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116 | END DO |
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117 | END DO |
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118 | END DO |
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119 | ! |
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120 | ! Boundary conditions |
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121 | sinktemp(:,:,1 ) = 0.e0 |
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122 | sinktemp(:,:,jpk) = 0.e0 |
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123 | |
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124 | DO jk=1,jpkm1 |
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125 | DO jj = 1,jpj |
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126 | DO ji = 1, jpi |
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127 | trn(ji,jj,jk,jn) = trn(ji,jj,jk,jn) & |
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128 | & + (sinktemp(ji,jj,jk)-sinktemp(ji,jj,jk+1)) & |
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129 | & /fse3t(ji,jj,jk) |
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130 | END DO |
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131 | END DO |
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132 | END DO |
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133 | |
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134 | ENDDO |
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135 | |
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136 | DO jk=1,jpkm1 |
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137 | DO jj = 1,jpj |
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138 | DO ji = 1, jpi |
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139 | ! |
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140 | trb(ji,jj,jk,jn) = trb(ji,jj,jk,jn) & |
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141 | & + 2.*(sinktemp(ji,jj,jk)-sinktemp(ji,jj,jk+1)) & |
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142 | & /fse3t(ji,jj,jk) |
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143 | ! |
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144 | ENDDO |
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145 | ENDDO |
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146 | ENDDO |
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147 | ! |
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148 | trn(:,:,:,jn) = trb(:,:,:,jn) |
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149 | sinktemp(:,:,:) = 2. * sinktemp(:,:,:) |
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150 | |
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151 | ! |
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152 | END SUBROUTINE p4z_sink2 |
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153 | |
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154 | #else |
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155 | !!====================================================================== |
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156 | !! Dummy module : No PISCES bio-model |
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157 | !!====================================================================== |
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158 | CONTAINS |
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159 | SUBROUTINE p4z_sink2( wstmp, sinktemp, jn ) ! Empty routine |
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160 | INTEGER, INTENT( in ) :: jn |
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161 | REAL , INTENT( in ) :: wstmp,sinktemp |
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162 | WRITE(*,*) 'p4z_sink2: You should not have seen this print! error?', jn, wstmp, sinktemp |
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163 | END SUBROUTINE p4z_sink2 |
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164 | #endif |
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165 | |
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166 | !!====================================================================== |
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167 | END MODULE p4zsink2 |
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