1 | MODULE sedinorg |
---|
2 | !!====================================================================== |
---|
3 | !! *** MODULE sedinorg *** |
---|
4 | !! Sediment : dissolution and reaction in pore water of |
---|
5 | !! inorganic species |
---|
6 | !!===================================================================== |
---|
7 | !! * Modules used |
---|
8 | USE sed ! sediment global variable |
---|
9 | USE sed_oce |
---|
10 | USE sedini |
---|
11 | USE sedmat |
---|
12 | USE lib_mpp ! distribued memory computing library |
---|
13 | USE lib_fortran |
---|
14 | |
---|
15 | IMPLICIT NONE |
---|
16 | PRIVATE |
---|
17 | |
---|
18 | PUBLIC sed_inorg |
---|
19 | |
---|
20 | !! $Id: seddsr.F90 5215 2015-04-15 16:11:56Z nicolasmartin $ |
---|
21 | CONTAINS |
---|
22 | |
---|
23 | SUBROUTINE sed_inorg( kt ) |
---|
24 | !!---------------------------------------------------------------------- |
---|
25 | !! *** ROUTINE sed_inorg *** |
---|
26 | !! |
---|
27 | !! ** Purpose : computes pore water dissolution and reaction |
---|
28 | !! |
---|
29 | !! ** Methode : implicit simultaneous computation of undersaturation |
---|
30 | !! resulting from diffusive pore water transport and chemical |
---|
31 | !! pore water reactions. Solid material is consumed according |
---|
32 | !! to redissolution and remineralisation |
---|
33 | !! |
---|
34 | !! ** Remarks : |
---|
35 | !! - undersaturation : deviation from saturation concentration |
---|
36 | !! - reaction rate : sink of undersaturation from dissolution |
---|
37 | !! of solid material |
---|
38 | !! |
---|
39 | !! History : |
---|
40 | !! ! 98-08 (E. Maier-Reimer, Christoph Heinze ) Original code |
---|
41 | !! ! 04-10 (N. Emprin, M. Gehlen ) f90 |
---|
42 | !! ! 06-04 (C. Ethe) Re-organization |
---|
43 | !! ! 19-08 (O. Aumont) Debugging and improvement of the model |
---|
44 | !!---------------------------------------------------------------------- |
---|
45 | !! Arguments |
---|
46 | INTEGER, INTENT(in) :: kt ! time step |
---|
47 | ! --- local variables |
---|
48 | INTEGER :: ji,jk ! dummy looop indices |
---|
49 | REAL(wp), DIMENSION(jpoce) :: zsieq, reac_silf |
---|
50 | REAL(wp) :: zsolid1, zreasat, zco3sat |
---|
51 | REAL(wp) :: zsatur, zsatur2, znusil, zsolcpcl, zsolcpsi, zexcess |
---|
52 | REAL(wp), DIMENSION(jpoce,jpksed) :: zundsat, zrearat, psms |
---|
53 | !! |
---|
54 | !!---------------------------------------------------------------------- |
---|
55 | |
---|
56 | IF( ln_timing ) CALL timing_start('sed_inorg') |
---|
57 | |
---|
58 | IF( kt == nitsed000 ) THEN |
---|
59 | IF (lwp) WRITE(numsed,*) ' sed_inorg : Dissolution of CaCO3 and BSi ' |
---|
60 | IF (lwp) WRITE(numsed,*) ' ' |
---|
61 | ENDIF |
---|
62 | ! |
---|
63 | DO ji = 1, jpoce |
---|
64 | ! ----------------------------------------------- |
---|
65 | ! Computation of Si solubility |
---|
66 | ! Param of Ridgwell et al. 2002 |
---|
67 | ! ----------------------------------------------- |
---|
68 | |
---|
69 | zsolcpcl = 0.0 |
---|
70 | zsolcpsi = 0.0 |
---|
71 | DO jk = 1, jpksed |
---|
72 | zsolcpsi = zsolcpsi + solcp(ji,jk,jsopal) * vols3d(ji,jk) |
---|
73 | zsolcpcl = zsolcpcl + solcp(ji,jk,jsclay) * vols3d(ji,jk) |
---|
74 | END DO |
---|
75 | zsolcpsi = MAX( zsolcpsi, rtrn ) |
---|
76 | zsieq(ji) = sieqs(ji) * MAX(0.2, 1.0 - (0.045 * zsolcpcl / zsolcpsi )**0.58 ) |
---|
77 | reac_silf(ji) = reac_sil * ( 0.05 + 0.055 * ( 1.64 * ( zsolcpcl / zsolcpsi + 0.01 ) )**(-0.75) ) / 1.25 |
---|
78 | END DO |
---|
79 | |
---|
80 | |
---|
81 | DO ji = 1, jpoce |
---|
82 | DO jk = 2, jpksed |
---|
83 | zsolid1 = volc(ji,jk,jsopal) * solcp(ji,jk,jsopal) |
---|
84 | zsatur = MAX(0., ( zsieq(ji) - pwcp(ji,jk,jwsil) ) / zsieq(ji) ) |
---|
85 | zsatur2 = (1.0 + temp(ji) / 400.0 )**37 |
---|
86 | znusil = ( 0.225 * ( 1.0 + temp(ji) / 15.) * zsatur + 0.775 * zsatur2 * zsatur**9.25 ) |
---|
87 | solcp(ji,jk,jsopal) = solcp(ji,jk,jsopal) - reac_silf(ji) * znusil * dtsed * solcp(ji,jk,jsopal) |
---|
88 | pwcp(ji,jk,jwsil) = pwcp(ji,jk,jwsil) + reac_silf(ji) * znusil * dtsed * zsolid1 |
---|
89 | END DO |
---|
90 | END DO |
---|
91 | |
---|
92 | !--------------------------------------------------------------- |
---|
93 | ! Performs CaCO3 particle deposition and redissolution (indice 9) |
---|
94 | !-------------------------------------------------------------- |
---|
95 | |
---|
96 | ! computes co3por from the updated pwcp concentrations (note [co3por] = mol/l) |
---|
97 | ! *densSW(l)**2 converts aksps [mol2/kg sol2] into [mol2/l2] to get [undsat] in [mol/l] |
---|
98 | DO ji = 1, jpoce |
---|
99 | zco3sat = aksps(ji) * densSW(ji) * densSW(ji) / ( calcon2(ji) + rtrn ) |
---|
100 | saturco3(ji,:) = 1.0 - co3por(ji,:) / ( rtrn + zco3sat ) |
---|
101 | DO jk = 1, jpksed |
---|
102 | zsolid1 = volc(ji,jk,jscal) * solcp(ji,jk,jscal) |
---|
103 | zundsat(ji,jk) = MAX( 0., zco3sat - co3por(ji,jk) ) |
---|
104 | zrearat(ji,jk) = ( reac_cal * zsolid1 / ( zco3sat + rtrn ) ) / & |
---|
105 | & ( 1. + reac_cal * dtsed * zundsat(ji,jk) / ( zco3sat + rtrn ) ) |
---|
106 | END DO |
---|
107 | END DO |
---|
108 | |
---|
109 | psms(:,:) = 0.0 |
---|
110 | ! solves tridiagonal system |
---|
111 | CALL sed_mat_dsri( jpksed, jwdic, -zrearat(:,:), psms(:,:), dtsed, zundsat ) |
---|
112 | |
---|
113 | ! New solid concentration values (jk=2 to jksed) for cacO3 |
---|
114 | DO jk = 2, jpksed |
---|
115 | DO ji = 1, jpoce |
---|
116 | zreasat = zrearat(ji,jk) * dtsed * zundsat(ji,jk) / ( volc(ji,jk,jscal) + rtrn ) |
---|
117 | solcp(ji,jk,jscal) = solcp(ji,jk,jscal) - zreasat |
---|
118 | zreasat = zrearat(ji,jk) * dtsed * zundsat(ji,jk) |
---|
119 | ! For DIC |
---|
120 | pwcp(ji,jk,jwdic) = pwcp(ji,jk,jwdic) + zreasat |
---|
121 | ! For alkalinity |
---|
122 | pwcp(ji,jk,jwalk) = pwcp(ji,jk,jwalk) + 2.* zreasat |
---|
123 | ENDDO |
---|
124 | ENDDO |
---|
125 | |
---|
126 | |
---|
127 | IF( ln_timing ) CALL timing_stop('sed_inorg') |
---|
128 | ! |
---|
129 | END SUBROUTINE sed_inorg |
---|
130 | |
---|
131 | END MODULE sedinorg |
---|