1 | MODULE seddiff |
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2 | !!====================================================================== |
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3 | !! *** MODULE seddsr *** |
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4 | !! Sediment : dissolution and reaction in pore water related |
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5 | !! related to organic matter |
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6 | !!===================================================================== |
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7 | !! * Modules used |
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8 | USE sed ! sediment global variable |
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9 | USE sed_oce |
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10 | USE sedmat ! linear system of equations |
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11 | USE sedini |
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12 | USE lib_mpp ! distribued memory computing library |
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13 | USE lib_fortran |
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14 | |
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15 | IMPLICIT NONE |
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16 | PRIVATE |
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17 | |
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18 | PUBLIC sed_diff |
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19 | |
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20 | !! * Module variables |
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21 | |
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22 | !! $Id: seddsr.F90 5215 2015-04-15 16:11:56Z nicolasmartin $ |
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23 | CONTAINS |
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24 | |
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25 | SUBROUTINE sed_diff( kt, knt ) |
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26 | !!---------------------------------------------------------------------- |
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27 | !! *** ROUTINE sed_diff *** |
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28 | !! |
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29 | !! ** Purpose : computes pore water diffusion |
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30 | !! |
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31 | !! ** Methode : implicit computation of undersaturation |
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32 | !! resulting from diffusive pore water transport. |
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33 | !! |
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34 | !! ** Remarks : |
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35 | !! - undersaturation : deviation from saturation concentration |
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36 | !! History : |
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37 | !! ! 98-08 (E. Maier-Reimer, Christoph Heinze ) Original code |
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38 | !! ! 04-10 (N. Emprin, M. Gehlen ) f90 |
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39 | !! ! 06-04 (C. Ethe) Re-organization |
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40 | !! ! 19-08 (O. Aumont) Debugging and improvement of the model |
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41 | !!---------------------------------------------------------------------- |
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42 | !! Arguments |
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43 | INTEGER, INTENT(in) :: kt, knt ! number of iteration |
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44 | ! --- local variables |
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45 | INTEGER :: ji, jk, js ! dummy looop indices |
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46 | |
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47 | REAL(wp), DIMENSION(jpoce,jpksed) :: zrearat1, zrearat2 ! reaction rate in pore water |
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48 | !! |
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49 | !!---------------------------------------------------------------------- |
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50 | |
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51 | IF( ln_timing ) CALL timing_start('sed_diff') |
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52 | ! |
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53 | IF( kt == nitsed000 .AND. knt == 1 ) THEN |
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54 | IF (lwp) THEN |
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55 | WRITE(numsed,*) ' sed_diff : pore-water diffusion ' |
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56 | WRITE(numsed,*) ' ' |
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57 | ENDIF |
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58 | ENDIF |
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59 | |
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60 | ! Initializations |
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61 | !---------------------- |
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62 | zrearat1(:,:) = 0. |
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63 | zrearat2(:,:) = 0. |
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64 | |
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65 | !--------------------------- |
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66 | ! Solves PO4 diffusion |
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67 | !---------------------------- |
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68 | |
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69 | ! solves tridiagonal system |
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70 | CALL sed_mat( jwpo4, jpoce, jpksed, zrearat1, zrearat2, pwcp(:,:,jwpo4), dtsed2 / 2.0_wp ) |
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71 | |
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72 | !--------------------------- |
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73 | ! Solves NH4 diffusion |
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74 | !---------------------------- |
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75 | |
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76 | ! solves tridiagonal system |
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77 | CALL sed_mat( jwnh4, jpoce, jpksed, zrearat1, zrearat2, pwcp(:,:,jwnh4), dtsed2 / 2.0_wp) |
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78 | |
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79 | !--------------------------- |
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80 | ! Solves Fe2+ diffusion |
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81 | !---------------------------- |
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82 | |
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83 | ! solves tridiagonal system |
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84 | CALL sed_mat( jwfe2, jpoce, jpksed, zrearat1, zrearat2, pwcp(:,:,jwfe2), dtsed2 / 2.0_wp ) |
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85 | |
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86 | !--------------------------- |
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87 | ! Solves H2S diffusion |
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88 | !---------------------------- |
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89 | |
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90 | ! solves tridiagonal system |
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91 | CALL sed_mat( jwh2s, jpoce, jpksed, zrearat1, zrearat2, pwcp(:,:,jwh2s), dtsed2 / 2.0_wp ) |
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92 | |
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93 | !--------------------------- |
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94 | ! Solves SO4 diffusion |
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95 | !---------------------------- |
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96 | |
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97 | ! solves tridiagonal system |
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98 | CALL sed_mat( jwso4, jpoce, jpksed, zrearat1, zrearat2, pwcp(:,:,jwso4), dtsed2 / 2.0_wp ) |
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99 | |
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100 | !--------------------------- |
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101 | ! Solves O2 diffusion |
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102 | !---------------------------- |
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103 | |
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104 | ! solves tridiagonal system |
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105 | CALL sed_mat( jwoxy, jpoce, jpksed, zrearat1, zrearat2, pwcp(:,:,jwoxy), dtsed2 / 2.0_wp ) |
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106 | |
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107 | !--------------------------- |
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108 | ! Solves NO3 diffusion |
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109 | !---------------------------- |
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110 | |
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111 | ! solves tridiagonal system |
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112 | CALL sed_mat( jwno3, jpoce, jpksed, zrearat1, zrearat2, pwcp(:,:,jwno3), dtsed2 / 2.0_wp ) |
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113 | |
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114 | CALL sed_mat( jwdic, jpoce, jpksed, zrearat1, zrearat2, sedligand(:,:), dtsed2 / 2.0_wp ) |
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115 | |
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116 | IF( ln_timing ) CALL timing_stop('sed_diff') |
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117 | ! |
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118 | END SUBROUTINE sed_diff |
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119 | |
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120 | END MODULE seddiff |
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