[8213] | 1 | MODULE carb_chem_mod |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE carb_chem_mod *** |
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| 4 | !! Calculate the carbon chemistry for the whole ocean |
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| 5 | !!====================================================================== |
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| 6 | !! History : |
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| 7 | !! - ! 2017-04 (M. Stringer) Code taken from trcbio_medusa.F90 |
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| 8 | !!---------------------------------------------------------------------- |
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| 9 | #if defined key_roam |
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| 10 | !!---------------------------------------------------------------------- |
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| 11 | !! key_roam? |
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| 12 | !!---------------------------------------------------------------------- |
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| 13 | |
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| 14 | IMPLICIT NONE |
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| 15 | PRIVATE |
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| 16 | |
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| 17 | PUBLIC carb_chem ! Called in trcbio_medusa.F90 |
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| 18 | |
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| 19 | !!---------------------------------------------------------------------- |
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| 20 | !! NEMO/TOP 2.0 , LOCEAN-IPSL (2007) |
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| 21 | !! $Id$ |
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| 22 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
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| 23 | !!---------------------------------------------------------------------- |
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| 24 | |
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| 25 | CONTAINS |
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| 26 | |
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| 27 | SUBROUTINE carb_chem( kt ) |
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| 28 | !!--------------------------------------------------------------------- |
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| 29 | !! *** ROUTINE carb_chem *** |
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| 30 | !! This called from TRC_BIO_MEDUSA and |
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| 31 | !! - ... |
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| 32 | !!---------------------------------------------------------------------- |
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| 33 | USE bio_medusa_mod, ONLY: f_co2flux, f_co3, f_dcf, & |
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| 34 | f_h2co3, f_hco3, f_henry, & |
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| 35 | f_kw660, f_omarg, f_omcal, & |
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| 36 | f_pco2atm, f_pco2w, f_ph, f_pp0, & |
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| 37 | f_TALK, f_TDIC, f_xco2a, & |
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| 38 | # if defined key_mocsy |
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| 39 | zpho, & |
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| 40 | # endif |
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| 41 | zalk, zdic, zsal, zsil, ztmp |
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| 42 | USE dom_oce, ONLY: gdept_0, gdept_n, gdepw_0, gdepw_n, & |
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| 43 | gphit, mbathy, tmask |
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| 44 | USE in_out_manager, ONLY: lwp, numout |
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| 45 | USE oce, ONLY: PCO2a_in_cpl, tsb, tsn |
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| 46 | USE par_kind, ONLY: wp |
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| 47 | USE par_medusa, ONLY: jpalk, jpdic, jpdin, jpsil |
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| 48 | USE par_oce, ONLY: jp_sal, jp_tem, jpi, jpim1, jpj, & |
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| 49 | jpjm1, jpk |
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| 50 | USE sbc_oce, ONLY: lk_oasis |
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| 51 | USE sms_medusa, ONLY: f2_ccd_arg, f2_ccd_cal, f3_co3, & |
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| 52 | f3_h2co3, f3_hco3, f3_omarg, & |
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| 53 | f3_omcal, f3_pH |
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| 54 | USE trc, ONLY: trn |
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| 55 | |
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| 56 | # if defined key_mocsy |
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| 57 | USE mocsy_wrapper, ONLY: mocsy_interface |
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| 58 | # else |
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| 59 | USE trcco2_medusa, ONLY: trc_co2_medusa |
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| 60 | # endif |
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| 61 | |
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| 62 | !!* Substitution |
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| 63 | # include "domzgr_substitute.h90" |
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| 64 | |
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| 65 | !! time (integer timestep) |
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| 66 | INTEGER, INTENT( in ) :: kt |
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| 67 | |
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| 68 | !! Flags to help with calculating the position of the CCD |
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| 69 | INTEGER, DIMENSION(jpi,jpj) :: i2_omcal,i2_omarg |
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| 70 | |
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| 71 | !! AXY (23/06/15): additional diagnostics for MOCSY and oxygen |
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| 72 | REAL(wp) :: f_rhosw |
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| 73 | !! Output arguments from mocsy_interface, which aren't used |
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| 74 | REAL(wp) :: f_fco2w_dum, f_BetaD_dum, f_opres_dum |
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| 75 | REAL(wp) :: f_insitut_dum, f_fco2atm_dum |
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| 76 | REAL(wp) :: f_schmidtco2_dum, f_kwco2_dum, f_K0_dum |
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| 77 | REAL(wp) :: f_co2starair_dum, f_dpco2_dum |
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| 78 | !! temporary variables |
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| 79 | REAL(wp) :: fq0,fq1,fq2,fq3,fq4 |
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| 80 | |
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| 81 | INTEGER :: iters |
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| 82 | !! Loop variables |
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| 83 | INTEGER :: ji, jj, jk |
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| 84 | |
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| 85 | !!---------------------------------------------------------------------- |
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| 86 | !! Calculate the carbonate chemistry for the whole ocean on the first |
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| 87 | !! simulation timestep and every month subsequently; the resulting 3D |
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| 88 | !! field of omega calcite is used to determine the depth of the CCD |
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| 89 | !!---------------------------------------------------------------------- |
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| 90 | !! |
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| 91 | ! IF(lwp) WRITE(numout,*) & |
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| 92 | ! ' MEDUSA calculating all carbonate chemistry at kt =', kt |
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| 93 | ! CALL flush(numout) |
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| 94 | !! blank flags |
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| 95 | i2_omcal(:,:) = 0 |
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| 96 | i2_omarg(:,:) = 0 |
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| 97 | |
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| 98 | !! Loop over levels |
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| 99 | DO jk = 1,jpk |
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| 100 | |
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| 101 | DO jj = 2,jpjm1 |
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| 102 | DO ji = 2,jpim1 |
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| 103 | !! OPEN wet point IF..THEN loop |
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| 104 | IF (tmask(ji,jj,jk).eq.1) THEN |
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| 105 | IF (lk_oasis) THEN |
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| 106 | !! use 2D atm xCO2 from atm coupling |
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| 107 | f_xco2a(ji,jj) = PCO2a_in_cpl(ji,jj) |
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| 108 | ENDIF |
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| 109 | !! Do carbonate chemistry |
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| 110 | !! |
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| 111 | !! Set up required state variables. |
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| 112 | !! dissolved inorganic carbon |
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| 113 | zdic(ji,jj) = max(0.,trn(ji,jj,jk,jpdic)) |
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| 114 | !! alkalinity |
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| 115 | zalk(ji,jj) = max(0.,trn(ji,jj,jk,jpalk)) |
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| 116 | !! temperature |
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| 117 | ztmp(ji,jj) = tsn(ji,jj,jk,jp_tem) |
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| 118 | !! salinity |
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| 119 | zsal(ji,jj) = tsn(ji,jj,jk,jp_sal) |
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| 120 | # if defined key_mocsy |
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| 121 | !! silicic acid |
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| 122 | zsil(ji,jj) = max(0.,trn(ji,jj,jk,jpsil)) |
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| 123 | !! phosphate via DIN and Redfield |
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| 124 | zpho(ji,jj) = max(0.,trn(ji,jj,jk,jpdin)) / 16.0 |
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| 125 | # endif |
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| 126 | !! |
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| 127 | !! AXY (28/02/14): check input fields |
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| 128 | if (ztmp(ji,jj) .lt. -3.0 .or. ztmp(ji,jj) .gt. 40.0 ) then |
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| 129 | IF (lwp) WRITE(numout,*) ' carb_chem: T WARNING 3D, ', & |
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| 130 | tsb(ji,jj,jk,jp_tem), tsn(ji,jj,jk,jp_tem), & |
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| 131 | ' at (', ji, ',', jj, ',', jk, ') at time', kt |
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| 132 | IF(lwp) WRITE(numout,*) & |
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| 133 | ' carb_chem: T SWITCHING 3D, ', & |
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| 134 | tsn(ji,jj,jk,jp_tem), ' -> ', tsb(ji,jj,jk,jp_tem) |
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| 135 | ztmp(ji,jj) = tsb(ji,jj,jk,jp_tem) !! temperature |
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| 136 | endif |
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| 137 | if (zsal(ji,jj) .lt. 0.0 .or. zsal(ji,jj) .gt. 45.0 ) then |
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| 138 | IF (lwp) WRITE(numout,*) ' carb_chem: S WARNING 3D, ', & |
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| 139 | tsb(ji,jj,jk,jp_sal), tsn(ji,jj,jk,jp_sal), & |
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| 140 | ' at (', ji, ',', jj, ',', jk, ') at time', kt |
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| 141 | endif |
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| 142 | ENDIF |
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| 143 | ENDDO |
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| 144 | ENDDO |
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| 145 | |
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| 146 | !! Blank input variables not used at this stage (they |
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| 147 | !! relate to air-sea flux) |
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| 148 | f_kw660(:,:) = 1.0 |
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| 149 | f_pp0(:,:) = 1.0 |
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| 150 | |
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| 151 | DO jj = 2,jpjm1 |
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| 152 | DO ji = 2,jpim1 |
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| 153 | IF (tmask(ji,jj,jk).eq.1) THEN |
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| 154 | !! calculate carbonate chemistry at grid cell midpoint |
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| 155 | # if defined key_mocsy |
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| 156 | !! AXY (22/06/15): use Orr & Epitalon (2015) MOCSY-2 carbonate |
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| 157 | !! chemistry package |
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| 158 | CALL mocsy_interface(ztmp(ji,jj),zsal(ji,jj),zalk(ji,jj), & |
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| 159 | zdic(ji,jj),zsil(ji,jj),zpho(ji,jj), & |
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| 160 | f_pp0(ji,jj),fsdept(ji,jj,jk), & |
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| 161 | gphit(ji,jj),f_kw660(ji,jj), & |
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| 162 | f_xco2a(ji,jj),1,f_ph(ji,jj), & |
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| 163 | f_pco2w(ji,jj),f_fco2w_dum, & |
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| 164 | f_h2co3(ji,jj),f_hco3(ji,jj), & |
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| 165 | f_co3(ji,jj),f_omarg(ji,jj), & |
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| 166 | f_omcal(ji,jj),f_BetaD_dum, & |
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| 167 | f_rhosw,f_opres_dum, & |
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| 168 | f_insitut_dum,f_pco2atm(ji,jj), & |
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| 169 | f_fco2atm_dum,f_schmidtco2_dum, & |
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| 170 | f_kwco2_dum,f_K0_dum, & |
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| 171 | f_co2starair_dum,f_co2flux(ji,jj), & |
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| 172 | f_dpco2_dum) |
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| 173 | !! |
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| 174 | !! mmol / m3 -> umol / kg |
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| 175 | f_TDIC(ji,jj) = (zdic(ji,jj) / f_rhosw) * 1000. |
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| 176 | !! meq / m3 -> ueq / kg |
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| 177 | f_TALK(ji,jj) = (zalk(ji,jj) / f_rhosw) * 1000. |
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| 178 | f_dcf(ji,jj) = f_rhosw |
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| 179 | # else |
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| 180 | !! AXY (22/06/15): use old PML carbonate chemistry |
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| 181 | !! package (the MEDUSA-2 default) |
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| 182 | CALL trc_co2_medusa(ztmp(ji,jj),zsal(ji,jj),zdic(ji,jj), & |
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| 183 | zalk(ji,jj),fsdept(ji,jj,jk), & |
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| 184 | f_kw660(ji,jj),f_xco2a(ji,jj), & |
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| 185 | f_ph(ji,jj), & |
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| 186 | f_pco2w(ji,jj),f_h2co3(ji,jj), & |
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| 187 | f_hco3(ji,jj),f_co3(ji,jj), & |
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| 188 | f_omcal(ji,jj),f_omarg(ji,jj), & |
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| 189 | f_co2flux(ji,jj),f_TDIC(ji,jj), & |
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| 190 | f_TALK(ji,jj),f_dcf(ji,jj), & |
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| 191 | f_henry(ji,jj),iters) |
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| 192 | !! |
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| 193 | !! AXY (28/02/14): check output fields |
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| 194 | IF (iters .eq. 25) THEN |
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| 195 | IF(lwp) WRITE(numout,*) & |
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| 196 | ' carb_chem: 3D ITERS WARNING, ', iters, ' AT (', & |
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| 197 | ji, ', ', jj, ', ', jk, ') AT ', kt |
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| 198 | ENDIF |
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| 199 | # endif |
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| 200 | !! |
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| 201 | !! store 3D outputs |
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| 202 | f3_pH(ji,jj,jk) = f_ph(ji,jj) |
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| 203 | f3_h2co3(ji,jj,jk) = f_h2co3(ji,jj) |
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| 204 | f3_hco3(ji,jj,jk) = f_hco3(ji,jj) |
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| 205 | f3_co3(ji,jj,jk) = f_co3(ji,jj) |
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| 206 | f3_omcal(ji,jj,jk) = f_omcal(ji,jj) |
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| 207 | f3_omarg(ji,jj,jk) = f_omarg(ji,jj) |
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| 208 | !! |
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| 209 | !! CCD calculation: calcite |
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| 210 | if (i2_omcal(ji,jj) == 0 .and. f_omcal(ji,jj) < 1.0) then |
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| 211 | if (jk .eq. 1) then |
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| 212 | f2_ccd_cal(ji,jj) = fsdept(ji,jj,jk) |
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| 213 | else |
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| 214 | fq0 = f3_omcal(ji,jj,jk-1) - f_omcal(ji,jj) |
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| 215 | fq1 = f3_omcal(ji,jj,jk-1) - 1.0 |
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| 216 | fq2 = fq1 / (fq0 + tiny(fq0)) |
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| 217 | fq3 = fsdept(ji,jj,jk) - fsdept(ji,jj,jk-1) |
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| 218 | fq4 = fq2 * fq3 |
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| 219 | f2_ccd_cal(ji,jj) = fsdept(ji,jj,jk-1) + fq4 |
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| 220 | endif |
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| 221 | i2_omcal(ji,jj) = 1 |
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| 222 | endif |
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| 223 | if ( i2_omcal(ji,jj) == 0 .and. jk == mbathy(ji,jj) ) then |
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| 224 | !! reached seafloor and still no dissolution; set |
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| 225 | !! to seafloor (W-point) |
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| 226 | f2_ccd_cal(ji,jj) = fsdepw(ji,jj,jk+1) |
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| 227 | i2_omcal(ji,jj) = 1 |
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| 228 | endif |
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| 229 | !! |
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| 230 | !! CCD calculation: aragonite |
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| 231 | if (i2_omarg(ji,jj) == 0 .and. f_omarg(ji,jj) < 1.0) then |
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| 232 | if (jk .eq. 1) then |
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| 233 | f2_ccd_arg(ji,jj) = fsdept(ji,jj,jk) |
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| 234 | else |
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| 235 | fq0 = f3_omarg(ji,jj,jk-1) - f_omarg(ji,jj) |
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| 236 | fq1 = f3_omarg(ji,jj,jk-1) - 1.0 |
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| 237 | fq2 = fq1 / (fq0 + tiny(fq0)) |
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| 238 | fq3 = fsdept(ji,jj,jk) - fsdept(ji,jj,jk-1) |
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| 239 | fq4 = fq2 * fq3 |
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| 240 | f2_ccd_arg(ji,jj) = fsdept(ji,jj,jk-1) + fq4 |
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| 241 | endif |
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| 242 | i2_omarg(ji,jj) = 1 |
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| 243 | endif |
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| 244 | if ( i2_omarg(ji,jj) == 0 .and. jk == mbathy(ji,jj) ) then |
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| 245 | !! reached seafloor and still no dissolution; set |
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| 246 | !! to seafloor (W-point) |
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| 247 | f2_ccd_arg(ji,jj) = fsdepw(ji,jj,jk+1) |
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| 248 | i2_omarg(ji,jj) = 1 |
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| 249 | endif |
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| 250 | ENDIF |
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| 251 | ENDDO |
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| 252 | ENDDO |
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| 253 | ENDDO |
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| 254 | |
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| 255 | END SUBROUTINE carb_chem |
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| 256 | |
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| 257 | #else |
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| 258 | !!====================================================================== |
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| 259 | !! Dummy module : None key_roam? |
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| 260 | !!====================================================================== |
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| 261 | CONTAINS |
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| 262 | SUBROUTINE carb_chem( ) ! Empty routine |
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| 263 | WRITE(*,*) 'carb_chem: You should not have seen this print! error?' |
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| 264 | END SUBROUTINE carb_chem |
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| 265 | #endif |
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| 266 | |
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| 267 | !!====================================================================== |
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| 268 | END MODULE carb_chem_mod |
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