1 | MODULE sedco3 |
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2 | !!====================================================================== |
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3 | !! *** MODULE sedco3 *** |
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4 | !! Sediment : carbonate in sediment pore water |
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5 | !!===================================================================== |
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6 | !! * Modules used |
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7 | USE sed ! sediment global variable |
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8 | USE sedchem |
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9 | USE lib_mpp ! distribued memory computing library |
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10 | |
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11 | |
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12 | IMPLICIT NONE |
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13 | PRIVATE |
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14 | |
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15 | !! * Routine accessibility |
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16 | PUBLIC sed_co3 |
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17 | |
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18 | !!---------------------------------------------------------------------- |
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19 | !! OPA 9.0 ! LODYC-IPSL (2003) |
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20 | !!---------------------------------------------------------------------- |
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21 | |
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22 | !! $Id$ |
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23 | CONTAINS |
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24 | |
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25 | |
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26 | SUBROUTINE sed_co3( kt ) |
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27 | !!---------------------------------------------------------------------- |
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28 | !! *** ROUTINE sed_co3 *** |
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29 | !! |
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30 | !! ** Purpose : carbonate ion and proton concentration |
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31 | !! in sediment pore water |
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32 | !! |
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33 | !! ** Methode : - solving nonlinear equation for [H+] with given alkalinity |
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34 | !! and total co2 |
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35 | !! - one dimensional newton-raphson algorithm for [H+]) |
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36 | !! |
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37 | !! History : |
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38 | !! ! 98-08 (E. Maier-Reimer, Christoph Heinze ) Original code |
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39 | !! ! 04-10 (N. Emprin, M. Gehlen ) coupled with PISCES |
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40 | !! ! 06-04 (C. Ethe) Re-organization |
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41 | !!---------------------------------------------------------------------- |
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42 | !! * Arguments |
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43 | INTEGER, INTENT(in) :: kt ! time step |
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44 | ! |
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45 | !---Local variables |
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46 | INTEGER :: ji, jk ! dummy loop indices |
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47 | |
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48 | REAL(wp), DIMENSION(jpoce,jpksed) :: zhinit, zhi |
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49 | !!---------------------------------------------------------------------- |
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50 | |
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51 | IF( ln_timing ) CALL timing_start('sed_co3') |
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52 | |
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53 | IF( kt == nitsed000 ) THEN |
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54 | IF (lwp) WRITE(numsed,*) ' sed_co3 : carbonate ion and proton concentration calculation ' |
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55 | IF (lwp) WRITE(numsed,*) ' ' |
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56 | ENDIF |
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57 | |
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58 | DO jk = 1, jpksed |
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59 | zhinit(:,jk) = hipor(:,jk) / densSW(:) |
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60 | END DO |
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61 | |
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62 | ! ------------------------------------------- |
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63 | ! COMPUTE [CO3--] and [H+] CONCENTRATIONS |
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64 | ! ------------------------------------------- |
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65 | |
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66 | CALL solve_at_general_sed(zhinit, zhi) |
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67 | |
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68 | DO jk = 1, jpksed |
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69 | DO ji = 1, jpoce |
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70 | co3por(ji,jk) = pwcp(ji,jk,jwdic) * ak1s(ji) * ak2s(ji) / (zhi(ji,jk)**2 & |
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71 | & + ak1s(ji) * zhi(ji,jk) + ak1s(ji) * ak2s(ji) + rtrn ) |
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72 | hipor(ji,jk) = zhi(ji,jk) * densSW(ji) |
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73 | END DO |
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74 | END DO |
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75 | |
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76 | IF( ln_timing ) CALL timing_stop('sed_co3') |
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77 | |
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78 | END SUBROUTINE sed_co3 |
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79 | |
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80 | END MODULE sedco3 |
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