| 1 | MODULE detritus_fast_sink_mod |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE detritus_fast_sink_mod *** |
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| 4 | !! Calculates fast-sinking detritus processes (plus other diagnostics) |
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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 | !! - ! 2018-19 (A. Yool) Bugfix for excessive CaCO3 production |
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| 9 | !!---------------------------------------------------------------------- |
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| 10 | #if defined key_medusa |
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| 11 | !!---------------------------------------------------------------------- |
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| 12 | !! MEDUSA bio-model |
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| 13 | !!---------------------------------------------------------------------- |
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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 detritus_fast_sink ! Called in detritus.F90 |
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| 19 | |
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| 20 | !!---------------------------------------------------------------------- |
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| 21 | !! NEMO/TOP 2.0 , LOCEAN-IPSL (2007) |
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| 22 | !! $Id$ |
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| 23 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
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| 24 | !!---------------------------------------------------------------------- |
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| 25 | |
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| 26 | CONTAINS |
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| 27 | |
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| 28 | SUBROUTINE detritus_fast_sink( jk, iball ) |
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| 29 | !!------------------------------------------------------------------- |
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| 30 | !! *** ROUTINE detritus_fast_sink *** |
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| 31 | !! This called from DETRITUS and calculates the fast-sinking detritus |
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| 32 | !!------------------------------------------------------------------- |
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| 33 | USE bio_medusa_mod, ONLY: b0, & |
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| 34 | f_benout_c, f_benout_ca, f_benout_fe, & |
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| 35 | f_benout_lyso_ca, f_benout_n, & |
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| 36 | f_benout_si, & |
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| 37 | f_fbenin_c, f_fbenin_ca, f_fbenin_fe, & |
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| 38 | f_fbenin_n, f_fbenin_si, f_omcal, & |
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| 39 | fccd, fdep1, fdd, & |
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| 40 | fdpd, fdpd2, fdpds, fdpds2, & |
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| 41 | fdpn, fdpn2, & |
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| 42 | fdzme, fdzme2, fdzmi, fdzmi2, & |
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| 43 | ffast2slowc, ffast2slown, & |
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| 44 | ffastc, ffastca, ffastfe, ffastn, & |
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| 45 | ffastsi, & |
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| 46 | fgmed, fgmepd, fgmepds, fgmepn, & |
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| 47 | fgmezmi, & |
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| 48 | fgmid, fgmipn, & |
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| 49 | ficme, ficmi, & |
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| 50 | fifd_fe, fifd_n, fifd_si, & |
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| 51 | finme, finmi, & |
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| 52 | fmeexcr, fmiexcr, & |
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| 53 | fofd_fe, fofd_n, fofd_si, & |
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| 54 | fregen, fregenfast, fregenfastsi, & |
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| 55 | fregensi, & |
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| 56 | freminc, freminca, freminfe, & |
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| 57 | freminn, freminsi, & |
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| 58 | fsdiss, & |
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| 59 | fsedc, fsedca, fsedn, fsedfe, fsedsi, & |
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| 60 | fslowc, fslowcflux, & |
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| 61 | fslown, fslownflux, & |
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| 62 | ftempc, ftempca, ftempfe, ftempn, & |
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| 63 | ftempsi, & |
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| 64 | # if defined key_roam |
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| 65 | fifd_c, fofd_c, fregenfastc, & |
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| 66 | zdic, zalk, & |
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| 67 | # endif |
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| 68 | idf, idfval, & |
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| 69 | zdet, zdtc |
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| 70 | USE dom_oce, ONLY: e3t_0, gdepw_0, gphit, mbathy, tmask |
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| 71 | # if defined key_vvl |
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| 72 | USE dom_oce, ONLY: e3t_n, gdepw_n |
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| 73 | # endif |
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| 74 | USE in_out_manager, ONLY: lwp, numout |
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| 75 | USE oce, ONLY: tsn |
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| 76 | USE par_kind, ONLY: wp |
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| 77 | USE par_oce, ONLY: jpi, jpim1, jpj, jpjm1 |
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| 78 | USE sms_medusa, ONLY: f2_ccd_cal, f3_omcal, & |
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| 79 | jexport, jfdfate, jinorgben, jocalccd, & |
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| 80 | jorgben, jp_tem, jrratio, & |
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| 81 | ocal_ccd, vsed, & |
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| 82 | xbetac, xbetan, & |
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| 83 | xcaco3a, xcaco3b, & |
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| 84 | xfastc, xfastca, xfastsi, & |
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| 85 | xfdfrac1, xfdfrac2, xfdfrac3, & |
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| 86 | xmassc, xmassca, xmasssi, & |
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| 87 | xphi, xprotca, xprotsi, & |
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| 88 | xrfn, xridg_r0, & |
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| 89 | xsedc, xsedca, xsedfe,xsedn, xsedsi, & |
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| 90 | xthetapd, xthetapn, & |
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| 91 | xthetazme, xthetazmi, & |
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| 92 | zn_sed_c, zn_sed_ca, zn_sed_fe, & |
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| 93 | zn_sed_n, zn_sed_si |
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| 94 | |
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| 95 | !!* Substitution |
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| 96 | # include "domzgr_substitute.h90" |
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| 97 | |
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| 98 | !! Level |
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| 99 | INTEGER, INTENT( in ) :: jk |
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| 100 | !! Fast detritus ballast scheme (0 = no; 1 = yes) |
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| 101 | INTEGER, INTENT( in ) :: iball |
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| 102 | |
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| 103 | !! Loop variables |
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| 104 | INTEGER :: ji, jj |
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| 105 | |
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| 106 | REAL(wp) :: fb_val, fl_sst |
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| 107 | !! Particle flux |
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| 108 | REAL(wp) :: fcaco3 |
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| 109 | REAL(wp) :: fprotf |
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| 110 | REAL(wp), DIMENSION(jpi,jpj) :: fccd_dep |
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| 111 | !! temporary variables |
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| 112 | REAL(wp) :: fq0,fq1,fq2,fq3,fq4,fq5,fq6,fq7,fq8 |
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| 113 | |
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| 114 | !! The two sections below, slow detritus creation and Nutrient |
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| 115 | !! regeneration are moved from just above the CALL to DETRITUS |
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| 116 | !! in trcbio_medusa.F90. |
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| 117 | !!--------------------------------------------------------- |
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| 118 | !! Slow detritus creation |
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| 119 | !!--------------------------------------------------------- |
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| 120 | DO jj = 2,jpjm1 |
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| 121 | DO ji = 2,jpim1 |
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| 122 | IF (tmask(ji,jj,jk) == 1) THEN |
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| 123 | !! |
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| 124 | !! this variable integrates the creation of slow sinking |
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| 125 | !! detritus to allow the split between fast and slow |
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| 126 | !! detritus to be diagnosed |
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| 127 | fslown(ji,jj) = fdpn(ji,jj) + fdzmi(ji,jj) + & |
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| 128 | ((1.0 - xfdfrac1) * fdpd(ji,jj)) + & |
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| 129 | ((1.0 - xfdfrac2) * fdzme(ji,jj)) + & |
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| 130 | ((1.0 - xbetan) * & |
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| 131 | (finmi(ji,jj) + finme(ji,jj))) |
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| 132 | !! |
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| 133 | !! this variable records the slow detrital sinking flux at |
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| 134 | !! this particular depth; it is used in the output of this |
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| 135 | !! flux at standard depths in the diagnostic outputs; |
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| 136 | !! needs to be adjusted from per second to per day because |
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| 137 | !! of parameter vsed |
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| 138 | fslownflux(ji,jj) = zdet(ji,jj) * vsed * 86400. |
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| 139 | # if defined key_roam |
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| 140 | !! |
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| 141 | !! and the same for detrital carbon |
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| 142 | fslowc(ji,jj) = (xthetapn * fdpn(ji,jj)) + & |
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| 143 | (xthetazmi * fdzmi(ji,jj)) + & |
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| 144 | (xthetapd * (1.0 - xfdfrac1) * & |
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| 145 | fdpd(ji,jj)) + & |
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| 146 | (xthetazme * (1.0 - xfdfrac2) * & |
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| 147 | fdzme(ji,jj)) + & |
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| 148 | ((1.0 - xbetac) * (ficmi(ji,jj) + & |
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| 149 | ficme(ji,jj))) |
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| 150 | !! |
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| 151 | !! this variable records the slow detrital sinking flux |
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| 152 | !! at this particular depth; it is used in the output of |
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| 153 | !! this flux at standard depths in the diagnostic |
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| 154 | !! outputs; needs to be adjusted from per second to per |
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| 155 | !! day because of parameter vsed |
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| 156 | fslowcflux(ji,jj) = zdtc(ji,jj) * vsed * 86400. |
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| 157 | # endif |
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| 158 | ENDIF |
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| 159 | ENDDO |
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| 160 | ENDDO |
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| 161 | |
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| 162 | !!--------------------------------------------------------- |
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| 163 | !! Nutrient regeneration |
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| 164 | !! this variable integrates total nitrogen regeneration down the |
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| 165 | !! watercolumn; its value is stored and output as a 2D diagnostic; |
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| 166 | !! the corresponding dissolution flux of silicon (from sources |
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| 167 | !! other than fast detritus) is also integrated; note that, |
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| 168 | !! confusingly, the linear loss terms from plankton compartments |
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| 169 | !! are labelled as fdX2 when one might have expected fdX or fdX1 |
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| 170 | !!--------------------------------------------------------- |
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| 171 | DO jj = 2,jpjm1 |
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| 172 | DO ji = 2,jpim1 |
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| 173 | IF (tmask(ji,jj,jk) == 1) THEN |
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| 174 | !! |
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| 175 | !! nitrogen |
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| 176 | fregen(ji,jj) = & |
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| 177 | ! messy feeding |
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| 178 | (((xphi * (fgmipn(ji,jj) + fgmid(ji,jj))) + & |
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| 179 | (xphi * & |
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| 180 | (fgmepn(ji,jj) + fgmepd(ji,jj) + & |
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| 181 | fgmezmi(ji,jj) + fgmed(ji,jj))) + & |
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| 182 | ! excretion + D remin. |
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| 183 | fmiexcr(ji,jj) + fmeexcr(ji,jj) + & |
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| 184 | fdd(ji,jj) + & |
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| 185 | ! linear mortality |
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| 186 | fdpn2(ji,jj) + fdpd2(ji,jj) + & |
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| 187 | fdzmi2(ji,jj) + fdzme2(ji,jj)) * & |
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| 188 | fse3t(ji,jj,jk)) |
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| 189 | !! |
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| 190 | !! silicon |
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| 191 | fregensi(ji,jj) = & |
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| 192 | ! dissolution + non-lin. mortality |
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| 193 | ((fsdiss(ji,jj) + & |
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| 194 | ((1.0 - xfdfrac1) * fdpds(ji,jj)) + & |
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| 195 | ! egestion by zooplankton |
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| 196 | ((1.0 - xfdfrac3) * fgmepds(ji,jj)) + & |
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| 197 | ! linear mortality |
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| 198 | fdpds2(ji,jj)) * fse3t(ji,jj,jk)) |
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| 199 | ENDIF |
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| 200 | ENDDO |
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| 201 | ENDDO |
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| 202 | |
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| 203 | !!------------------------------------------------------------------- |
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| 204 | !! Fast-sinking detritus terms |
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| 205 | !! "local" variables declared so that conservation can be checked; |
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| 206 | !! the calculated terms are added to the fast-sinking flux later on |
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| 207 | !! only after the flux entering this level has experienced some |
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| 208 | !! remineralisation |
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| 209 | !! note: these fluxes need to be scaled by the level thickness |
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| 210 | !!------------------------------------------------------------------- |
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| 211 | DO jj = 2,jpjm1 |
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| 212 | DO ji = 2,jpim1 |
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| 213 | !! OPEN wet point IF..THEN loop |
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| 214 | if (tmask(ji,jj,jk) == 1) then |
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| 215 | |
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| 216 | !! nitrogen: diatom and mesozooplankton mortality |
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| 217 | ftempn(ji,jj) = b0 * ((xfdfrac1 * fdpd(ji,jj)) + & |
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| 218 | (xfdfrac2 * fdzme(ji,jj))) |
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| 219 | !! |
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| 220 | !! silicon: diatom mortality and grazed diatoms |
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| 221 | ftempsi(ji,jj) = b0 * ((xfdfrac1 * fdpds(ji,jj)) + & |
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| 222 | (xfdfrac3 * fgmepds(ji,jj))) |
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| 223 | !! |
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| 224 | !! iron: diatom and mesozooplankton mortality |
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| 225 | ftempfe(ji,jj) = b0 * (((xfdfrac1 * fdpd(ji,jj)) + & |
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| 226 | (xfdfrac2 * fdzme(ji,jj))) * xrfn) |
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| 227 | !! |
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| 228 | !! carbon: diatom and mesozooplankton mortality |
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| 229 | ftempc(ji,jj) = b0 * ((xfdfrac1 * xthetapd * fdpd(ji,jj)) + & |
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| 230 | (xfdfrac2 * xthetazme * fdzme(ji,jj))) |
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| 231 | !! |
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| 232 | ENDIF |
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| 233 | ENDDO |
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| 234 | ENDDO |
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| 235 | |
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| 236 | # if defined key_roam |
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| 237 | DO jj = 2,jpjm1 |
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| 238 | DO ji = 2,jpim1 |
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| 239 | if (tmask(ji,jj,jk) == 1) then |
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| 240 | if (jrratio.eq.0) then |
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| 241 | !! CaCO3: latitudinally-based fraction of total |
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| 242 | !! primary production |
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| 243 | !! 0.10 at equator; 0.02 at pole |
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| 244 | fcaco3 = xcaco3a + ((xcaco3b - xcaco3a) * & |
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| 245 | ((90.0 - abs(gphit(ji,jj))) / 90.0)) |
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| 246 | elseif (jrratio.eq.1) then |
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| 247 | !! CaCO3: Ridgwell et al. (2007) submodel, version 1 |
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| 248 | !! this uses SURFACE omega calcite to regulate |
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| 249 | !! rain ratio |
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| 250 | if (f_omcal(ji,jj).ge.1.0) then |
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| 251 | fq1 = (f_omcal(ji,jj) - 1.0)**0.81 |
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| 252 | else |
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| 253 | fq1 = 0. |
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| 254 | endif |
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| 255 | fcaco3 = xridg_r0 * fq1 |
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| 256 | elseif (jrratio.eq.2) then |
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| 257 | !! CaCO3: Ridgwell et al. (2007) submodel, version 2 |
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| 258 | !! this uses FULL 3D omega calcite to regulate |
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| 259 | !! rain ratio |
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| 260 | if (f3_omcal(ji,jj,jk).ge.1.0) then |
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| 261 | fq1 = (f3_omcal(ji,jj,jk) - 1.0)**0.81 |
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| 262 | else |
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| 263 | fq1 = 0. |
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| 264 | endif |
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| 265 | fcaco3 = xridg_r0 * fq1 |
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| 266 | endif |
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| 267 | # else |
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| 268 | !! CaCO3: latitudinally-based fraction of total primary |
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| 269 | !! production |
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| 270 | !! 0.10 at equator; 0.02 at pole |
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| 271 | fcaco3 = xcaco3a + ((xcaco3b - xcaco3a) * & |
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| 272 | ((90.0 - abs(gphit(ji,jj))) / 90.0)) |
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| 273 | # endif |
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| 274 | !! AXY (09/03/09): convert CaCO3 production from function of |
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| 275 | !! primary production into a function of fast-sinking material; |
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| 276 | !! technically, this is what Dunne et al. (2007) do anyway; they |
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| 277 | !! convert total primary production estimated from surface |
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| 278 | !! chlorophyll to an export flux for which they apply conversion |
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| 279 | !! factors to estimate the various elemental fractions (Si, Ca) |
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| 280 | ftempca(ji,jj) = ftempc(ji,jj) * fcaco3 |
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| 281 | |
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| 282 | # if defined key_roam |
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| 283 | !! AXY (12/10/18): while DIC and alkalinity typically occur at |
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| 284 | !! high concentrations in the ocean relative to the fluxes that |
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| 285 | !! affect them, there are occasions when fluxes are comparable |
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| 286 | !! to local concentrations; for example, the "microboils" found |
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| 287 | !! in UKESM1 produce very temporary (<< 1 day) T & S excursions |
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| 288 | !! that also affect BGC tracers, moving them towards near-zero |
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| 289 | !! concentrations; this causes carbonate chemistry deviations |
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| 290 | !! that, in turn, potentially support CaCO3 production that is |
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| 291 | !! in excess of local availability of DIC and alkalinity; the |
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| 292 | !! following code ensures that ftempca does not exceed the local |
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| 293 | !! capacities of both tracers |
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| 294 | fq0 = 0.1 ! threshold change limiter |
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| 295 | fq1 = min(ftempca(ji,jj), (zdic(ji,jj) * fq0)) ! DIC |
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| 296 | fq2 = min(ftempca(ji,jj) * 2.0, (zalk(ji,jj) * fq0)) ! ALK |
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| 297 | fq3 = min(fq1, (fq2 / 2.0)) ! select smallest flux |
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| 298 | ftempca(ji,jj) = fq3 ! reset CaCO3 production |
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| 299 | # endif |
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| 300 | |
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| 301 | # if defined key_debug_medusa |
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| 302 | !! integrate total fast detritus production |
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| 303 | if (idf.eq.1) then |
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| 304 | fifd_n(ji,jj) = fifd_n(ji,jj) + (ftempn(ji,jj) * & |
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| 305 | fse3t(ji,jj,jk)) |
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| 306 | fifd_si(ji,jj) = fifd_si(ji,jj) + (ftempsi(ji,jj) * & |
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| 307 | fse3t(ji,jj,jk)) |
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| 308 | fifd_fe(ji,jj) = fifd_fe(ji,jj) + (ftempfe(ji,jj) * & |
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| 309 | fse3t(ji,jj,jk)) |
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| 310 | # if defined key_roam |
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| 311 | fifd_c(ji,jj) = fifd_c(ji,jj) + (ftempc(ji,jj) * & |
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| 312 | fse3t(ji,jj,jk)) |
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| 313 | # endif |
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| 314 | endif |
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| 315 | |
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| 316 | !! report quantities of fast-sinking detritus for each component |
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| 317 | if (idf.eq.1.AND.idfval.eq.1) then |
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| 318 | IF (lwp) write (numout,*) '------------------------------' |
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| 319 | ! These variables are not in this routine - marc 28/4/17 |
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| 320 | ! IF (lwp) write (numout,*) 'fdpd(',jk,') = ', fdpd(ji,jj) |
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| 321 | ! IF (lwp) write (numout,*) 'fdzme(',jk,') = ', fdzme(ji,jj) |
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| 322 | IF (lwp) write (numout,*) 'ftempn(',jk,') = ', ftempn(ji,jj) |
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| 323 | IF (lwp) write (numout,*) 'ftempsi(',jk,') = ', ftempsi(ji,jj) |
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| 324 | IF (lwp) write (numout,*) 'ftempfe(',jk,') = ', ftempfe(ji,jj) |
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| 325 | IF (lwp) write (numout,*) 'ftempc(',jk,') = ', ftempc(ji,jj) |
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| 326 | IF (lwp) write (numout,*) 'ftempca(',jk,') = ', ftempca(ji,jj) |
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| 327 | IF (lwp) write (numout,*) 'flat(',jk,') = ', & |
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| 328 | abs(gphit(ji,jj)) |
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| 329 | IF (lwp) write (numout,*) 'fcaco3(',jk,') = ', fcaco3 |
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| 330 | endif |
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| 331 | # endif |
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| 332 | ENDIF |
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| 333 | ENDDO |
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| 334 | ENDDO |
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| 335 | |
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| 336 | !!---------------------------------------------------------- |
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| 337 | !! This version of MEDUSA offers a choice of three methods for |
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| 338 | !! handling the remineralisation of fast detritus. All three |
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| 339 | !! do so in broadly the same way: |
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| 340 | !! |
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| 341 | !! 1. Fast detritus is stored as a 2D array [ ffastX ] |
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| 342 | !! 2. Fast detritus is added level-by-level [ ftempX ] |
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| 343 | !! 3. Fast detritus is not remineralised in the top box |
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| 344 | !! [ freminX ] |
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| 345 | !! 4. Remaining fast detritus is remineralised in the |
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| 346 | !! bottom [ fsedX ] box |
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| 347 | !! |
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| 348 | !! The three remineralisation methods are: |
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| 349 | !! |
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| 350 | !! 1. Ballast model (i.e. that published in Yool et al., |
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| 351 | !! 2011) |
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| 352 | !! (1b. Ballast-sans-ballast model) |
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| 353 | !! 2. Martin et al. (1987) |
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| 354 | !! 3. Henson et al. (2011) |
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| 355 | !! |
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| 356 | !! The first of these couples C, N and Fe remineralisation to |
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| 357 | !! the remineralisation of particulate Si and CaCO3, but the |
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| 358 | !! latter two treat remineralisation of C, N, Fe, Si and CaCO3 |
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| 359 | !! completely separately. At present a switch within the code |
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| 360 | !! regulates which submodel is used, but this should be moved |
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| 361 | !! to the namelist file. |
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| 362 | !! |
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| 363 | !! The ballast-sans-ballast submodel is an original development |
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| 364 | !! feature of MEDUSA in which the ballast submodel's general |
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| 365 | !! framework and parameterisation is used, but in which there |
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| 366 | !! is no protection of organic material afforded by ballasting |
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| 367 | !! minerals. While similar, it is not the same as the Martin |
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| 368 | !! et al. (1987) submodel. |
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| 369 | !! |
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| 370 | !! Since the three submodels behave the same in terms of |
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| 371 | !! accumulating sinking material and remineralising it all at |
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| 372 | !! the seafloor, these portions of the code below are common to |
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| 373 | !! all three. |
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| 374 | !!---------------------------------------------------------- |
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| 375 | if (jexport.eq.1) then |
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| 376 | DO jj = 2,jpjm1 |
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| 377 | DO ji = 2,jpim1 |
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| 378 | if (tmask(ji,jj,jk) == 1) then |
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| 379 | !!======================================================= |
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| 380 | !! BALLAST SUBMODEL |
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| 381 | !!======================================================= |
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| 382 | !! |
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| 383 | !!------------------------------------------------------- |
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| 384 | !! Fast-sinking detritus fluxes, pt. 1: REMINERALISATION |
|---|
| 385 | !! aside from explicitly modelled, slow-sinking detritus, the |
|---|
| 386 | !! model includes an implicit representation of detrital |
|---|
| 387 | !! particles that sink too quickly to be modelled with |
|---|
| 388 | !! explicit state variables; this sinking flux is instead |
|---|
| 389 | !! instantaneously remineralised down the water column using |
|---|
| 390 | !! the version of Armstrong et al. (2002)'s ballast model |
|---|
| 391 | !! used by Dunne et al. (2007); the version of this model |
|---|
| 392 | !! here considers silicon and calcium carbonate ballast |
|---|
| 393 | !! minerals; this section of the code redistributes the fast |
|---|
| 394 | !! sinking material generated locally down the water column; |
|---|
| 395 | !! this differs from Dunne et al. (2007) in that fast sinking |
|---|
| 396 | !! material is distributed at *every* level below that it is |
|---|
| 397 | !! generated, rather than at every level below some fixed |
|---|
| 398 | !! depth; this scheme is also different in that sinking |
|---|
| 399 | !! material generated in one level is aggregated with that |
|---|
| 400 | !! generated by shallower levels; this should make the |
|---|
| 401 | !! ballast model more self-consistent (famous last words) |
|---|
| 402 | !!------------------------------------------------------- |
|---|
| 403 | !! |
|---|
| 404 | if (jk.eq.1) then |
|---|
| 405 | !! this is the SURFACE OCEAN BOX (no remineralisation) |
|---|
| 406 | !! |
|---|
| 407 | freminc(ji,jj) = 0.0 |
|---|
| 408 | freminn(ji,jj) = 0.0 |
|---|
| 409 | freminfe(ji,jj) = 0.0 |
|---|
| 410 | freminsi(ji,jj) = 0.0 |
|---|
| 411 | freminca(ji,jj) = 0.0 |
|---|
| 412 | elseif (jk.le.mbathy(ji,jj)) then |
|---|
| 413 | !! this is an OCEAN BOX (remineralise some material) |
|---|
| 414 | !! |
|---|
| 415 | !! set up CCD depth to be used depending on user choice |
|---|
| 416 | if (jocalccd.eq.0) then |
|---|
| 417 | !! use default CCD field |
|---|
| 418 | fccd_dep(ji,jj) = ocal_ccd(ji,jj) |
|---|
| 419 | elseif (jocalccd.eq.1) then |
|---|
| 420 | !! use calculated CCD field |
|---|
| 421 | fccd_dep(ji,jj) = f2_ccd_cal(ji,jj) |
|---|
| 422 | endif |
|---|
| 423 | !! |
|---|
| 424 | !! === organic carbon === |
|---|
| 425 | !! how much organic C enters this box (mol) |
|---|
| 426 | fq0 = ffastc(ji,jj) |
|---|
| 427 | if (iball.eq.1) then |
|---|
| 428 | !! how much it weighs |
|---|
| 429 | fq1 = (fq0 * xmassc) |
|---|
| 430 | !! how much CaCO3 enters this box |
|---|
| 431 | fq2 = (ffastca(ji,jj) * xmassca) |
|---|
| 432 | !! how much opal enters this box |
|---|
| 433 | fq3 = (ffastsi(ji,jj) * xmasssi) |
|---|
| 434 | !! total protected organic C |
|---|
| 435 | fq4 = (fq2 * xprotca) + (fq3 * xprotsi) |
|---|
| 436 | !! This next term is calculated for C but used for |
|---|
| 437 | !! N and Fe as well |
|---|
| 438 | !! It needs to be protected in case ALL C is protected |
|---|
| 439 | if (fq4.lt.fq1) then |
|---|
| 440 | !! protected fraction of total organic C (non-dim) |
|---|
| 441 | fprotf = (fq4 / (fq1 + tiny(fq1))) |
|---|
| 442 | else |
|---|
| 443 | !! all organic C is protected (non-dim) |
|---|
| 444 | fprotf = 1.0 |
|---|
| 445 | endif |
|---|
| 446 | !! unprotected fraction of total organic C (non-dim) |
|---|
| 447 | fq5 = (1.0 - fprotf) |
|---|
| 448 | !! how much organic C is unprotected (mol) |
|---|
| 449 | fq6 = (fq0 * fq5) |
|---|
| 450 | !! how much unprotected C leaves this box (mol) |
|---|
| 451 | fq7 = (fq6 * exp(-(fse3t(ji,jj,jk) / xfastc))) |
|---|
| 452 | !! how much total C leaves this box (mol) |
|---|
| 453 | fq8 = (fq7 + (fq0 * fprotf)) |
|---|
| 454 | !! C remineralisation in this box (mol) |
|---|
| 455 | freminc(ji,jj) = (fq0 - fq8) / fse3t(ji,jj,jk) |
|---|
| 456 | ffastc(ji,jj) = fq8 |
|---|
| 457 | # if defined key_debug_medusa |
|---|
| 458 | !! report in/out/remin fluxes of carbon for this level |
|---|
| 459 | if (idf.eq.1.AND.idfval.eq.1) then |
|---|
| 460 | IF (lwp) write (numout,*) & |
|---|
| 461 | '------------------------------' |
|---|
| 462 | IF (lwp) write (numout,*) 'totalC(',jk,') = ', & |
|---|
| 463 | fq1 |
|---|
| 464 | IF (lwp) write (numout,*) 'prtctC(',jk,') = ', & |
|---|
| 465 | fq4 |
|---|
| 466 | IF (lwp) write (numout,*) 'fprotf(',jk,') = ', & |
|---|
| 467 | fprotf |
|---|
| 468 | IF (lwp) write (numout,*) & |
|---|
| 469 | '------------------------------' |
|---|
| 470 | IF (lwp) write (numout,*) 'IN C(',jk,') = ', & |
|---|
| 471 | fq0 |
|---|
| 472 | IF (lwp) write (numout,*) 'LOST C(',jk,') = ', & |
|---|
| 473 | freminc(ji,jj) * fse3t(ji,jj,jk) |
|---|
| 474 | IF (lwp) write (numout,*) 'OUT C(',jk,') = ', & |
|---|
| 475 | fq8 |
|---|
| 476 | IF (lwp) write (numout,*) 'NEW C(',jk,') = ', & |
|---|
| 477 | ftempc(ji,jj) * fse3t(ji,jj,jk) |
|---|
| 478 | endif |
|---|
| 479 | # endif |
|---|
| 480 | else |
|---|
| 481 | !! how much organic C leaves this box (mol) |
|---|
| 482 | fq1 = fq0 * exp(-(fse3t(ji,jj,jk) / xfastc)) |
|---|
| 483 | !! C remineralisation in this box (mol) |
|---|
| 484 | freminc(ji,jj) = (fq0 - fq1) / fse3t(ji,jj,jk) |
|---|
| 485 | ffastc(ji,jj) = fq1 |
|---|
| 486 | endif |
|---|
| 487 | !! |
|---|
| 488 | !! === organic nitrogen === |
|---|
| 489 | !! how much organic N enters this box (mol) |
|---|
| 490 | fq0 = ffastn(ji,jj) |
|---|
| 491 | if (iball.eq.1) then |
|---|
| 492 | !! unprotected fraction of total organic N (non-dim) |
|---|
| 493 | fq5 = (1.0 - fprotf) |
|---|
| 494 | !! how much organic N is unprotected (mol) |
|---|
| 495 | fq6 = (fq0 * fq5) |
|---|
| 496 | !! how much unprotected N leaves this box (mol) |
|---|
| 497 | fq7 = (fq6 * exp(-(fse3t(ji,jj,jk) / xfastc))) |
|---|
| 498 | !! how much total N leaves this box (mol) |
|---|
| 499 | fq8 = (fq7 + (fq0 * fprotf)) |
|---|
| 500 | !! N remineralisation in this box (mol) |
|---|
| 501 | freminn(ji,jj) = (fq0 - fq8) / fse3t(ji,jj,jk) |
|---|
| 502 | ffastn(ji,jj) = fq8 |
|---|
| 503 | # if defined key_debug_medusa |
|---|
| 504 | !! report in/out/remin fluxes of carbon for this level |
|---|
| 505 | if (idf.eq.1.AND.idfval.eq.1) then |
|---|
| 506 | IF (lwp) write (numout,*) & |
|---|
| 507 | '------------------------------' |
|---|
| 508 | IF (lwp) write (numout,*) 'totalN(',jk,') = ', fq1 |
|---|
| 509 | IF (lwp) write (numout,*) 'prtctN(',jk,') = ', fq4 |
|---|
| 510 | IF (lwp) write (numout,*) 'fprotf(',jk,') = ', & |
|---|
| 511 | fprotf |
|---|
| 512 | IF (lwp) write (numout,*) & |
|---|
| 513 | '------------------------------' |
|---|
| 514 | if (freminn(ji,jj) < 0.0) then |
|---|
| 515 | IF (lwp) write (numout,*) '** FREMIN ERROR **' |
|---|
| 516 | endif |
|---|
| 517 | IF (lwp) write (numout,*) 'IN N(',jk,') = ', fq0 |
|---|
| 518 | IF (lwp) write (numout,*) 'LOST N(',jk,') = ', & |
|---|
| 519 | freminn(ji,jj) * fse3t(ji,jj,jk) |
|---|
| 520 | IF (lwp) write (numout,*) 'OUT N(',jk,') = ', fq8 |
|---|
| 521 | IF (lwp) write (numout,*) 'NEW N(',jk,') = ', & |
|---|
| 522 | ftempn(ji,jj) * fse3t(ji,jj,jk) |
|---|
| 523 | endif |
|---|
| 524 | # endif |
|---|
| 525 | else |
|---|
| 526 | !! how much organic N leaves this box (mol) |
|---|
| 527 | fq1 = fq0 * exp(-(fse3t(ji,jj,jk) / xfastc)) |
|---|
| 528 | !! N remineralisation in this box (mol) |
|---|
| 529 | freminn(ji,jj) = (fq0 - fq1) / fse3t(ji,jj,jk) |
|---|
| 530 | ffastn(ji,jj) = fq1 |
|---|
| 531 | endif |
|---|
| 532 | !! |
|---|
| 533 | !! === organic iron === |
|---|
| 534 | !! how much organic Fe enters this box (mol) |
|---|
| 535 | fq0 = ffastfe(ji,jj) |
|---|
| 536 | if (iball.eq.1) then |
|---|
| 537 | !! unprotected fraction of total organic Fe (non-dim) |
|---|
| 538 | fq5 = (1.0 - fprotf) |
|---|
| 539 | !! how much organic Fe is unprotected (mol) |
|---|
| 540 | fq6 = (fq0 * fq5) |
|---|
| 541 | !! how much unprotected Fe leaves this box (mol) |
|---|
| 542 | fq7 = (fq6 * exp(-(fse3t(ji,jj,jk) / xfastc))) |
|---|
| 543 | !! how much total Fe leaves this box (mol) |
|---|
| 544 | fq8 = (fq7 + (fq0 * fprotf)) |
|---|
| 545 | !! Fe remineralisation in this box (mol) |
|---|
| 546 | freminfe(ji,jj) = (fq0 - fq8) / fse3t(ji,jj,jk) |
|---|
| 547 | ffastfe(ji,jj) = fq8 |
|---|
| 548 | else |
|---|
| 549 | !! how much total Fe leaves this box (mol) |
|---|
| 550 | fq1 = fq0 * exp(-(fse3t(ji,jj,jk) / xfastc)) |
|---|
| 551 | !! Fe remineralisation in this box (mol) |
|---|
| 552 | freminfe(ji,jj) = (fq0 - fq1) / fse3t(ji,jj,jk) |
|---|
| 553 | ffastfe(ji,jj) = fq1 |
|---|
| 554 | endif |
|---|
| 555 | !! |
|---|
| 556 | !! === biogenic silicon === |
|---|
| 557 | !! how much opal centers this box (mol) |
|---|
| 558 | fq0 = ffastsi(ji,jj) |
|---|
| 559 | !! how much opal leaves this box (mol) |
|---|
| 560 | fq1 = fq0 * exp(-(fse3t(ji,jj,jk) / xfastsi)) |
|---|
| 561 | !! Si remineralisation in this box (mol) |
|---|
| 562 | freminsi(ji,jj) = (fq0 - fq1) / fse3t(ji,jj,jk) |
|---|
| 563 | ffastsi(ji,jj) = fq1 |
|---|
| 564 | !! |
|---|
| 565 | !! === biogenic calcium carbonate === |
|---|
| 566 | !! how much CaCO3 enters this box (mol) |
|---|
| 567 | fq0 = ffastca(ji,jj) |
|---|
| 568 | if (fsdepw(ji,jj,jk).le.fccd_dep(ji,jj)) then |
|---|
| 569 | !! whole grid cell above CCD |
|---|
| 570 | !! above lysocline, no Ca dissolves (mol) |
|---|
| 571 | fq1 = fq0 |
|---|
| 572 | !! above lysocline, no Ca dissolves (mol) |
|---|
| 573 | freminca(ji,jj) = 0.0 |
|---|
| 574 | !! which is the last level above the CCD? (#) |
|---|
| 575 | fccd(ji,jj) = real(jk) |
|---|
| 576 | elseif (fsdepw(ji,jj,jk).ge.fccd_dep(ji,jj)) then |
|---|
| 577 | !! whole grid cell below CCD |
|---|
| 578 | !! how much CaCO3 leaves this box (mol) |
|---|
| 579 | fq1 = fq0 * exp(-(fse3t(ji,jj,jk) / xfastca)) |
|---|
| 580 | !! Ca remineralisation in this box (mol) |
|---|
| 581 | freminca(ji,jj) = (fq0 - fq1) / fse3t(ji,jj,jk) |
|---|
| 582 | else |
|---|
| 583 | !! partial grid cell below CCD |
|---|
| 584 | !! amount of grid cell below CCD (m) |
|---|
| 585 | fq2 = fdep1(ji,jj) - fccd_dep(ji,jj) |
|---|
| 586 | !! how much CaCO3 leaves this box (mol) |
|---|
| 587 | fq1 = fq0 * exp(-(fq2 / xfastca)) |
|---|
| 588 | !! Ca remineralisation in this box (mol) |
|---|
| 589 | freminca(ji,jj) = (fq0 - fq1) / fse3t(ji,jj,jk) |
|---|
| 590 | endif |
|---|
| 591 | ffastca(ji,jj) = fq1 |
|---|
| 592 | else |
|---|
| 593 | !! this is BELOW THE LAST OCEAN BOX (do nothing) |
|---|
| 594 | freminc(ji,jj) = 0.0 |
|---|
| 595 | freminn(ji,jj) = 0.0 |
|---|
| 596 | freminfe(ji,jj) = 0.0 |
|---|
| 597 | freminsi(ji,jj) = 0.0 |
|---|
| 598 | freminca(ji,jj) = 0.0 |
|---|
| 599 | endif |
|---|
| 600 | ENDIF |
|---|
| 601 | ENDDO |
|---|
| 602 | ENDDO |
|---|
| 603 | elseif (jexport.eq.2.or.jexport.eq.3) then |
|---|
| 604 | DO jj = 2,jpjm1 |
|---|
| 605 | DO ji = 2,jpim1 |
|---|
| 606 | if (tmask(ji,jj,jk) == 1) then |
|---|
| 607 | if (jexport.eq.2) then |
|---|
| 608 | !!==================================================== |
|---|
| 609 | !! MARTIN ET AL. (1987) SUBMODEL |
|---|
| 610 | !!==================================================== |
|---|
| 611 | !! |
|---|
| 612 | !!---------------------------------------------------- |
|---|
| 613 | !! This submodel uses the classic Martin et al. (1987) |
|---|
| 614 | !! curve to determine the attenuation of fast-sinking |
|---|
| 615 | !! detritus down the water column. All three organic |
|---|
| 616 | !! elements, C, N and Fe, are handled identically, and |
|---|
| 617 | !! their quantities in sinking particles attenuate |
|---|
| 618 | !! according to a power relationship governed by |
|---|
| 619 | !! parameter "b". This is assigned a canonical value |
|---|
| 620 | !! of -0.858. Biogenic opal and calcium carbonate are |
|---|
| 621 | !! attentuated using the same function as in the |
|---|
| 622 | !! ballast submodel |
|---|
| 623 | !!---------------------------------------------------- |
|---|
| 624 | !! |
|---|
| 625 | fb_val = -0.858 |
|---|
| 626 | elseif (jexport.eq.3) then |
|---|
| 627 | !!==================================================== |
|---|
| 628 | !! HENSON ET AL. (2011) SUBMODEL |
|---|
| 629 | !!==================================================== |
|---|
| 630 | !! |
|---|
| 631 | !!---------------------------------------------------- |
|---|
| 632 | !! This submodel reconfigures the Martin et al. (1987) |
|---|
| 633 | !! curve by allowing the "b" value to vary |
|---|
| 634 | !! geographically. Its value is set, following Henson |
|---|
| 635 | !! et al. (2011), as a function of local sea surface |
|---|
| 636 | !! temperature: |
|---|
| 637 | !! b = -1.06 + (0.024 * SST) |
|---|
| 638 | !! This means that remineralisation length scales are |
|---|
| 639 | !! longer in warm, tropical areas and shorter in cold, |
|---|
| 640 | !! polar areas. This does seem back-to-front (i.e. |
|---|
| 641 | !! one would expect GREATER remineralisation in warmer |
|---|
| 642 | !! waters), but is an outcome of analysis of sediment |
|---|
| 643 | !! trap data, and it may reflect details of ecosystem |
|---|
| 644 | !! structure that pertain to particle production |
|---|
| 645 | !! rather than simply Q10. |
|---|
| 646 | !!---------------------------------------------------- |
|---|
| 647 | !! |
|---|
| 648 | fl_sst = tsn(ji,jj,1,jp_tem) |
|---|
| 649 | fb_val = -1.06 + (0.024 * fl_sst) |
|---|
| 650 | endif |
|---|
| 651 | !! |
|---|
| 652 | if (jk.eq.1) then |
|---|
| 653 | !! this is the SURFACE OCEAN BOX (no remineralisation) |
|---|
| 654 | !! |
|---|
| 655 | freminc(ji,jj) = 0.0 |
|---|
| 656 | freminn(ji,jj) = 0.0 |
|---|
| 657 | freminfe(ji,jj) = 0.0 |
|---|
| 658 | freminsi(ji,jj) = 0.0 |
|---|
| 659 | freminca(ji,jj) = 0.0 |
|---|
| 660 | elseif (jk.le.mbathy(ji,jj)) then |
|---|
| 661 | !! this is an OCEAN BOX (remineralise some material) |
|---|
| 662 | !! |
|---|
| 663 | !! === organic carbon === |
|---|
| 664 | !! how much organic C enters this box (mol) |
|---|
| 665 | fq0 = ffastc(ji,jj) |
|---|
| 666 | !! how much organic C leaves this box (mol) |
|---|
| 667 | fq1 = fq0 * ((fdep1(ji,jj)/fsdepw(ji,jj,jk))**fb_val) |
|---|
| 668 | !! C remineralisation in this box (mol) |
|---|
| 669 | freminc(ji,jj) = (fq0 - fq1) / fse3t(ji,jj,jk) |
|---|
| 670 | ffastc(ji,jj) = fq1 |
|---|
| 671 | !! |
|---|
| 672 | !! === organic nitrogen === |
|---|
| 673 | !! how much organic N enters this box (mol) |
|---|
| 674 | fq0 = ffastn(ji,jj) |
|---|
| 675 | !! how much organic N leaves this box (mol) |
|---|
| 676 | fq1 = fq0 * ((fdep1(ji,jj)/fsdepw(ji,jj,jk))**fb_val) |
|---|
| 677 | !! N remineralisation in this box (mol) |
|---|
| 678 | freminn(ji,jj) = (fq0 - fq1) / fse3t(ji,jj,jk) |
|---|
| 679 | ffastn(ji,jj) = fq1 |
|---|
| 680 | !! |
|---|
| 681 | !! === organic iron === |
|---|
| 682 | !! how much organic Fe enters this box (mol) |
|---|
| 683 | fq0 = ffastfe(ji,jj) |
|---|
| 684 | !! how much organic Fe leaves this box (mol) |
|---|
| 685 | fq1 = fq0 * ((fdep1(ji,jj)/fsdepw(ji,jj,jk))**fb_val) |
|---|
| 686 | !! Fe remineralisation in this box (mol) |
|---|
| 687 | freminfe(ji,jj) = (fq0 - fq1) / fse3t(ji,jj,jk) |
|---|
| 688 | ffastfe(ji,jj) = fq1 |
|---|
| 689 | !! |
|---|
| 690 | !! === biogenic silicon === |
|---|
| 691 | !! how much opal centers this box (mol) |
|---|
| 692 | fq0 = ffastsi(ji,jj) |
|---|
| 693 | !! how much opal leaves this box (mol) |
|---|
| 694 | fq1 = fq0 * exp(-(fse3t(ji,jj,jk) / xfastsi)) |
|---|
| 695 | !! Si remineralisation in this box (mol) |
|---|
| 696 | freminsi(ji,jj) = (fq0 - fq1) / fse3t(ji,jj,jk) |
|---|
| 697 | ffastsi(ji,jj) = fq1 |
|---|
| 698 | !! |
|---|
| 699 | !! === biogenic calcium carbonate === |
|---|
| 700 | !! how much CaCO3 enters this box (mol) |
|---|
| 701 | fq0 = ffastca(ji,jj) |
|---|
| 702 | if (fsdepw(ji,jj,jk).le.ocal_ccd(ji,jj)) then |
|---|
| 703 | !! whole grid cell above CCD |
|---|
| 704 | !! above lysocline, no Ca dissolves (mol) |
|---|
| 705 | fq1 = fq0 |
|---|
| 706 | !! above lysocline, no Ca dissolves (mol) |
|---|
| 707 | freminca(ji,jj) = 0.0 |
|---|
| 708 | !! which is the last level above the CCD? (#) |
|---|
| 709 | fccd(ji,jj) = real(jk) |
|---|
| 710 | elseif (fsdepw(ji,jj,jk).ge.ocal_ccd(ji,jj)) then |
|---|
| 711 | !! whole grid cell below CCD |
|---|
| 712 | !! how much CaCO3 leaves this box (mol) |
|---|
| 713 | fq1 = fq0 * exp(-(fse3t(ji,jj,jk) / xfastca)) |
|---|
| 714 | !! Ca remineralisation in this box (mol) |
|---|
| 715 | freminca(ji,jj) = (fq0 - fq1) / fse3t(ji,jj,jk) |
|---|
| 716 | else |
|---|
| 717 | !! partial grid cell below CCD |
|---|
| 718 | !! amount of grid cell below CCD (m) |
|---|
| 719 | fq2 = fdep1(ji,jj) - ocal_ccd(ji,jj) |
|---|
| 720 | !! how much CaCO3 leaves this box (mol) |
|---|
| 721 | fq1 = fq0 * exp(-(fq2 / xfastca)) |
|---|
| 722 | !! Ca remineralisation in this box (mol) |
|---|
| 723 | freminca(ji,jj) = (fq0 - fq1) / fse3t(ji,jj,jk) |
|---|
| 724 | endif |
|---|
| 725 | ffastca(ji,jj) = fq1 |
|---|
| 726 | else |
|---|
| 727 | !! this is BELOW THE LAST OCEAN BOX (do nothing) |
|---|
| 728 | freminc(ji,jj) = 0.0 |
|---|
| 729 | freminn(ji,jj) = 0.0 |
|---|
| 730 | freminfe(ji,jj) = 0.0 |
|---|
| 731 | freminsi(ji,jj) = 0.0 |
|---|
| 732 | freminca(ji,jj) = 0.0 |
|---|
| 733 | endif |
|---|
| 734 | ENDIF |
|---|
| 735 | ENDDO |
|---|
| 736 | ENDDO |
|---|
| 737 | endif |
|---|
| 738 | |
|---|
| 739 | DO jj = 2,jpjm1 |
|---|
| 740 | DO ji = 2,jpim1 |
|---|
| 741 | if (tmask(ji,jj,jk) == 1) then |
|---|
| 742 | !!---------------------------------------------------------- |
|---|
| 743 | !! Fast-sinking detritus fluxes, pt. 2: UPDATE FAST FLUXES |
|---|
| 744 | !! here locally calculated additions to the fast-sinking |
|---|
| 745 | !! flux are added to the total fast-sinking flux; this is |
|---|
| 746 | !! done here such that material produced in a particular |
|---|
| 747 | !! layer is only remineralised below this layer |
|---|
| 748 | !!---------------------------------------------------------- |
|---|
| 749 | !! |
|---|
| 750 | !! add sinking material generated in this layer to running |
|---|
| 751 | !! totals |
|---|
| 752 | !! |
|---|
| 753 | !! === organic carbon === |
|---|
| 754 | !! (diatom and mesozooplankton mortality) |
|---|
| 755 | ffastc(ji,jj) = ffastc(ji,jj) + (ftempc(ji,jj) * & |
|---|
| 756 | fse3t(ji,jj,jk)) |
|---|
| 757 | !! |
|---|
| 758 | !! === organic nitrogen === |
|---|
| 759 | !! (diatom and mesozooplankton mortality) |
|---|
| 760 | ffastn(ji,jj) = ffastn(ji,jj) + (ftempn(ji,jj) * & |
|---|
| 761 | fse3t(ji,jj,jk)) |
|---|
| 762 | !! |
|---|
| 763 | !! === organic iron === |
|---|
| 764 | !! (diatom and mesozooplankton mortality) |
|---|
| 765 | ffastfe(ji,jj) = ffastfe(ji,jj) + (ftempfe(ji,jj) * & |
|---|
| 766 | fse3t(ji,jj,jk)) |
|---|
| 767 | !! |
|---|
| 768 | !! === biogenic silicon === |
|---|
| 769 | !! (diatom mortality and grazed diatoms) |
|---|
| 770 | ffastsi(ji,jj) = ffastsi(ji,jj) + (ftempsi(ji,jj) * & |
|---|
| 771 | fse3t(ji,jj,jk)) |
|---|
| 772 | !! |
|---|
| 773 | !! === biogenic calcium carbonate === |
|---|
| 774 | !! (latitudinally-based fraction of total primary production) |
|---|
| 775 | ffastca(ji,jj) = ffastca(ji,jj) + (ftempca(ji,jj) * & |
|---|
| 776 | fse3t(ji,jj,jk)) |
|---|
| 777 | ENDIF |
|---|
| 778 | ENDDO |
|---|
| 779 | ENDDO |
|---|
| 780 | |
|---|
| 781 | DO jj = 2,jpjm1 |
|---|
| 782 | DO ji = 2,jpim1 |
|---|
| 783 | if (tmask(ji,jj,jk) == 1) then |
|---|
| 784 | !!---------------------------------------------------------- |
|---|
| 785 | !! Fast-sinking detritus fluxes, pt. 3: SEAFLOOR |
|---|
| 786 | !! remineralise all remaining fast-sinking detritus to dissolved |
|---|
| 787 | !! nutrients; the sedimentation fluxes calculated here allow the |
|---|
| 788 | !! separation of what's remineralised sinking through the final |
|---|
| 789 | !! ocean box from that which is added to the final box by the |
|---|
| 790 | !! remineralisation of material that reaches the seafloor (i.e. |
|---|
| 791 | !! the model assumes that *all* material that hits the seafloor |
|---|
| 792 | !! is remineralised and that none is permanently buried; hey, |
|---|
| 793 | !! this is a giant GCM model that can't be run for long enough |
|---|
| 794 | !! to deal with burial fluxes!) |
|---|
| 795 | !! |
|---|
| 796 | !! in a change to this process, in part so that MEDUSA behaves |
|---|
| 797 | !! a little more like ERSEM et al., fast-sinking detritus (N, Fe |
|---|
| 798 | !! and C) is converted to slow sinking detritus at the seafloor |
|---|
| 799 | !! instead of being remineralised; the rationale is that in |
|---|
| 800 | !! shallower shelf regions (... that are not fully mixed!) this |
|---|
| 801 | !! allows the detrital material to return slowly to dissolved |
|---|
| 802 | !! nutrient rather than instantaneously as now; the alternative |
|---|
| 803 | !! would be to explicitly handle seafloor organic material - a |
|---|
| 804 | !! headache I don't wish to experience at this point; note that |
|---|
| 805 | !! fast-sinking Si and Ca detritus is just remineralised as |
|---|
| 806 | !! per usual |
|---|
| 807 | !! |
|---|
| 808 | !! AXY (13/01/12) |
|---|
| 809 | !! in a further change to this process, again so that MEDUSA is |
|---|
| 810 | !! a little more like ERSEM et al., material that reaches the |
|---|
| 811 | !! seafloor can now be added to sediment pools and stored for |
|---|
| 812 | !! slow release; there are new 2D arrays for organic nitrogen, |
|---|
| 813 | !! iron and carbon and inorganic silicon and carbon that allow |
|---|
| 814 | !! fast and slow detritus that reaches the seafloor to be held |
|---|
| 815 | !! and released back to the water column more slowly; these |
|---|
| 816 | !! arrays are transferred via the tracer restart files between |
|---|
| 817 | !! repeat submissions of the model |
|---|
| 818 | !!---------------------------------------------------------- |
|---|
| 819 | !! |
|---|
| 820 | ffast2slowc(ji,jj) = 0.0 |
|---|
| 821 | ffast2slown(ji,jj) = 0.0 |
|---|
| 822 | ! I don't think this is used - marc 10/4/17 |
|---|
| 823 | ! ffast2slowfe(ji,jj) = 0.0 |
|---|
| 824 | !! |
|---|
| 825 | if (jk.eq.mbathy(ji,jj)) then |
|---|
| 826 | !! this is the BOTTOM OCEAN BOX (remineralise everything) |
|---|
| 827 | !! |
|---|
| 828 | !! AXY (17/01/12): tweaked to include benthos pools |
|---|
| 829 | !! |
|---|
| 830 | !! === organic carbon === |
|---|
| 831 | if (jfdfate.eq.0 .and. jorgben.eq.0) then |
|---|
| 832 | !! C remineralisation in this box (mol/m3) |
|---|
| 833 | freminc(ji,jj) = freminc(ji,jj) + (ffastc(ji,jj) / & |
|---|
| 834 | fse3t(ji,jj,jk)) |
|---|
| 835 | elseif (jfdfate.eq.1 .and. jorgben.eq.0) then |
|---|
| 836 | !! fast C -> slow C (mol/m3) |
|---|
| 837 | ffast2slowc(ji,jj) = ffastc(ji,jj) / fse3t(ji,jj,jk) |
|---|
| 838 | fslowc(ji,jj) = fslowc(ji,jj) + ffast2slowc(ji,jj) |
|---|
| 839 | elseif (jfdfate.eq.0 .and. jorgben.eq.1) then |
|---|
| 840 | !! fast C -> benthic C (mol/m2) |
|---|
| 841 | f_fbenin_c(ji,jj) = ffastc(ji,jj) |
|---|
| 842 | endif |
|---|
| 843 | !! record seafloor C (mol/m2) |
|---|
| 844 | fsedc(ji,jj) = ffastc(ji,jj) |
|---|
| 845 | ffastc(ji,jj) = 0.0 |
|---|
| 846 | !! |
|---|
| 847 | !! === organic nitrogen === |
|---|
| 848 | if (jfdfate.eq.0 .and. jorgben.eq.0) then |
|---|
| 849 | !! N remineralisation in this box (mol/m3) |
|---|
| 850 | freminn(ji,jj) = freminn(ji,jj) + (ffastn(ji,jj) / & |
|---|
| 851 | fse3t(ji,jj,jk)) |
|---|
| 852 | elseif (jfdfate.eq.1 .and. jorgben.eq.0) then |
|---|
| 853 | !! fast N -> slow N (mol/m3) |
|---|
| 854 | ffast2slown(ji,jj) = ffastn(ji,jj) / fse3t(ji,jj,jk) |
|---|
| 855 | fslown(ji,jj) = fslown(ji,jj) + ffast2slown(ji,jj) |
|---|
| 856 | elseif (jfdfate.eq.0 .and. jorgben.eq.1) then |
|---|
| 857 | !! fast N -> benthic N (mol/m2) |
|---|
| 858 | f_fbenin_n(ji,jj) = ffastn(ji,jj) |
|---|
| 859 | endif |
|---|
| 860 | !! record seafloor N (mol/m2) |
|---|
| 861 | fsedn(ji,jj) = ffastn(ji,jj) |
|---|
| 862 | ffastn(ji,jj) = 0.0 |
|---|
| 863 | !! |
|---|
| 864 | !! === organic iron === |
|---|
| 865 | if (jfdfate.eq.0 .and. jorgben.eq.0) then |
|---|
| 866 | !! Fe remineralisation in this box (mol/m3) |
|---|
| 867 | freminfe(ji,jj) = freminfe(ji,jj) + (ffastfe(ji,jj) / & |
|---|
| 868 | fse3t(ji,jj,jk)) |
|---|
| 869 | ! I don't think ffast2slowfe is used - marc 10/4/17 |
|---|
| 870 | ! elseif (jfdfate.eq.1 .and. jorgben.eq.0) then |
|---|
| 871 | ! !! fast Fe -> slow Fe (mol/m3) |
|---|
| 872 | ! ffast2slowfe(ji,jj) = ffastn(ji,jj) / fse3t(ji,jj,jk) |
|---|
| 873 | elseif (jfdfate.eq.0 .and. jorgben.eq.1) then |
|---|
| 874 | !! fast Fe -> benthic Fe (mol/m2) |
|---|
| 875 | f_fbenin_fe(ji,jj) = ffastfe(ji,jj) |
|---|
| 876 | endif |
|---|
| 877 | !! record seafloor Fe (mol/m2) |
|---|
| 878 | fsedfe(ji,jj) = ffastfe(ji,jj) |
|---|
| 879 | ffastfe(ji,jj) = 0.0 |
|---|
| 880 | !! |
|---|
| 881 | !! === biogenic silicon === |
|---|
| 882 | if (jinorgben.eq.0) then |
|---|
| 883 | !! Si remineralisation in this box (mol/m3) |
|---|
| 884 | freminsi(ji,jj) = freminsi(ji,jj) + (ffastsi(ji,jj) / & |
|---|
| 885 | fse3t(ji,jj,jk)) |
|---|
| 886 | elseif (jinorgben.eq.1) then |
|---|
| 887 | !! fast Si -> benthic Si |
|---|
| 888 | f_fbenin_si(ji,jj) = ffastsi(ji,jj) |
|---|
| 889 | endif |
|---|
| 890 | !! record seafloor Si (mol/m2) |
|---|
| 891 | fsedsi(ji,jj) = ffastsi(ji,jj) |
|---|
| 892 | ffastsi(ji,jj) = 0.0 |
|---|
| 893 | !! |
|---|
| 894 | !! === biogenic calcium carbonate === |
|---|
| 895 | if (jinorgben.eq.0) then |
|---|
| 896 | !! Ca remineralisation in this box (mol/m3) |
|---|
| 897 | freminca(ji,jj) = freminca(ji,jj) + (ffastca(ji,jj) / & |
|---|
| 898 | fse3t(ji,jj,jk)) |
|---|
| 899 | elseif (jinorgben.eq.1) then |
|---|
| 900 | !! fast Ca -> benthic Ca (mol/m2) |
|---|
| 901 | f_fbenin_ca(ji,jj) = ffastca(ji,jj) |
|---|
| 902 | endif |
|---|
| 903 | !! record seafloor Ca (mol/m2) |
|---|
| 904 | fsedca(ji,jj) = ffastca(ji,jj) |
|---|
| 905 | ffastca(ji,jj) = 0.0 |
|---|
| 906 | endif |
|---|
| 907 | |
|---|
| 908 | # if defined key_debug_medusa |
|---|
| 909 | if (idf.eq.1) then |
|---|
| 910 | !!------------------------------------------------------- |
|---|
| 911 | !! Integrate total fast detritus remineralisation |
|---|
| 912 | !!------------------------------------------------------- |
|---|
| 913 | !! |
|---|
| 914 | fofd_n(ji,jj) = fofd_n(ji,jj) + (freminn(ji,jj) * & |
|---|
| 915 | fse3t(ji,jj,jk)) |
|---|
| 916 | fofd_si(ji,jj) = fofd_si(ji,jj) + (freminsi(ji,jj) * & |
|---|
| 917 | fse3t(ji,jj,jk)) |
|---|
| 918 | fofd_fe(ji,jj) = fofd_fe(ji,jj) + (freminfe(ji,jj) * & |
|---|
| 919 | fse3t(ji,jj,jk)) |
|---|
| 920 | # if defined key_roam |
|---|
| 921 | fofd_c(ji,jj) = fofd_c(ji,jj) + (freminc(ji,jj) * & |
|---|
| 922 | fse3t(ji,jj,jk)) |
|---|
| 923 | # endif |
|---|
| 924 | endif |
|---|
| 925 | # endif |
|---|
| 926 | ENDIF |
|---|
| 927 | ENDDO |
|---|
| 928 | ENDDO |
|---|
| 929 | |
|---|
| 930 | DO jj = 2,jpjm1 |
|---|
| 931 | DO ji = 2,jpim1 |
|---|
| 932 | if (tmask(ji,jj,jk) == 1) then |
|---|
| 933 | !!---------------------------------------------------------- |
|---|
| 934 | !! Sort out remineralisation tally of fast-sinking detritus |
|---|
| 935 | !!---------------------------------------------------------- |
|---|
| 936 | !! |
|---|
| 937 | !! update fast-sinking regeneration arrays |
|---|
| 938 | fregenfast(ji,jj) = fregenfast(ji,jj) + & |
|---|
| 939 | (freminn(ji,jj) * fse3t(ji,jj,jk)) |
|---|
| 940 | fregenfastsi(ji,jj) = fregenfastsi(ji,jj) + & |
|---|
| 941 | (freminsi(ji,jj) * fse3t(ji,jj,jk)) |
|---|
| 942 | # if defined key_roam |
|---|
| 943 | fregenfastc(ji,jj) = fregenfastc(ji,jj) + & |
|---|
| 944 | (freminc(ji,jj) * fse3t(ji,jj,jk)) |
|---|
| 945 | # endif |
|---|
| 946 | ENDIF |
|---|
| 947 | ENDDO |
|---|
| 948 | ENDDO |
|---|
| 949 | |
|---|
| 950 | DO jj = 2,jpjm1 |
|---|
| 951 | DO ji = 2,jpim1 |
|---|
| 952 | if (tmask(ji,jj,jk) == 1) then |
|---|
| 953 | !!---------------------------------------------------------- |
|---|
| 954 | !! Benthic remineralisation fluxes |
|---|
| 955 | !!---------------------------------------------------------- |
|---|
| 956 | !! |
|---|
| 957 | if (jk.eq.mbathy(ji,jj)) then |
|---|
| 958 | !! |
|---|
| 959 | !! organic components |
|---|
| 960 | if (jorgben.eq.1) then |
|---|
| 961 | f_benout_n(ji,jj) = xsedn * zn_sed_n(ji,jj) |
|---|
| 962 | f_benout_fe(ji,jj) = xsedfe * zn_sed_fe(ji,jj) |
|---|
| 963 | f_benout_c(ji,jj) = xsedc * zn_sed_c(ji,jj) |
|---|
| 964 | endif |
|---|
| 965 | !! |
|---|
| 966 | !! inorganic components |
|---|
| 967 | if (jinorgben.eq.1) then |
|---|
| 968 | f_benout_si(ji,jj) = xsedsi * zn_sed_si(ji,jj) |
|---|
| 969 | f_benout_ca(ji,jj) = xsedca * zn_sed_ca(ji,jj) |
|---|
| 970 | !! |
|---|
| 971 | !! account for CaCO3 that dissolves when it shouldn't |
|---|
| 972 | if ( fsdepw(ji,jj,jk) .le. fccd_dep(ji,jj) ) then |
|---|
| 973 | f_benout_lyso_ca(ji,jj) = xsedca * zn_sed_ca(ji,jj) |
|---|
| 974 | endif |
|---|
| 975 | endif |
|---|
| 976 | endif |
|---|
| 977 | CALL flush(numout) |
|---|
| 978 | |
|---|
| 979 | ENDIF |
|---|
| 980 | ENDDO |
|---|
| 981 | ENDDO |
|---|
| 982 | |
|---|
| 983 | END SUBROUTINE detritus_fast_sink |
|---|
| 984 | |
|---|
| 985 | #else |
|---|
| 986 | !!====================================================================== |
|---|
| 987 | !! Dummy module : No MEDUSA bio-model |
|---|
| 988 | !!====================================================================== |
|---|
| 989 | CONTAINS |
|---|
| 990 | SUBROUTINE detritus_fast_sink( ) ! Empty routine |
|---|
| 991 | WRITE(*,*) 'detritus_fast_sink: You should not have seen this print! error?' |
|---|
| 992 | END SUBROUTINE detritus_fast_sink |
|---|
| 993 | #endif |
|---|
| 994 | |
|---|
| 995 | !!====================================================================== |
|---|
| 996 | END MODULE detritus_fast_sink_mod |
|---|
