[3443] | 1 | MODULE p4zsink |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE p4zsink *** |
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| 4 | !! TOP : PISCES vertical flux of particulate matter due to gravitational sinking |
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| 5 | !!====================================================================== |
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| 6 | !! History : 1.0 ! 2004 (O. Aumont) Original code |
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| 7 | !! 2.0 ! 2007-12 (C. Ethe, G. Madec) F90 |
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| 8 | !! 3.4 ! 2011-06 (O. Aumont, C. Ethe) Change aggregation formula |
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| 9 | !! 3.5 ! 2012-07 (O. Aumont) Introduce potential time-splitting |
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| 10 | !!---------------------------------------------------------------------- |
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| 11 | !! p4z_sink : Compute vertical flux of particulate matter due to gravitational sinking |
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| 12 | !! p4z_sink_init : Unitialisation of sinking speed parameters |
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| 13 | !! p4z_sink_alloc : Allocate sinking speed variables |
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| 14 | !!---------------------------------------------------------------------- |
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| 15 | USE oce_trc ! shared variables between ocean and passive tracers |
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| 16 | USE trc ! passive tracers common variables |
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| 17 | USE sms_pisces ! PISCES Source Minus Sink variables |
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[10375] | 18 | USE trcsink ! General routine to compute sedimentation |
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[3443] | 19 | USE prtctl_trc ! print control for debugging |
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| 20 | USE iom ! I/O manager |
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| 21 | USE lib_mpp |
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| 22 | |
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| 23 | IMPLICIT NONE |
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| 24 | PRIVATE |
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| 25 | |
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| 26 | PUBLIC p4z_sink ! called in p4zbio.F90 |
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| 27 | PUBLIC p4z_sink_init ! called in trcsms_pisces.F90 |
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| 28 | PUBLIC p4z_sink_alloc |
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| 29 | |
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| 30 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: sinking, sinking2 !: POC sinking fluxes |
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| 31 | ! ! (different meanings depending on the parameterization) |
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[7646] | 32 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: sinkingn, sinking2n !: POC sinking fluxes |
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| 33 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: sinkingp, sinking2p !: POC sinking fluxes |
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[3443] | 34 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: sinkcal, sinksil !: CaCO3 and BSi sinking fluxes |
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| 35 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: sinkfer !: Small BFe sinking fluxes |
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| 36 | REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: sinkfer2 !: Big iron sinking fluxes |
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| 37 | |
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[4996] | 38 | INTEGER :: ik100 |
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[3443] | 39 | |
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| 40 | !!---------------------------------------------------------------------- |
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[10067] | 41 | !! NEMO/TOP 4.0 , NEMO Consortium (2018) |
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[10069] | 42 | !! $Id$ |
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[10068] | 43 | !! Software governed by the CeCILL license (see ./LICENSE) |
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[3443] | 44 | !!---------------------------------------------------------------------- |
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| 45 | CONTAINS |
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| 46 | |
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| 47 | !!---------------------------------------------------------------------- |
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| 48 | !! 'standard sinking parameterisation' ??? |
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| 49 | !!---------------------------------------------------------------------- |
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| 50 | |
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[5385] | 51 | SUBROUTINE p4z_sink ( kt, knt ) |
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[3443] | 52 | !!--------------------------------------------------------------------- |
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| 53 | !! *** ROUTINE p4z_sink *** |
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| 54 | !! |
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| 55 | !! ** Purpose : Compute vertical flux of particulate matter due to |
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| 56 | !! gravitational sinking |
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| 57 | !! |
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| 58 | !! ** Method : - ??? |
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| 59 | !!--------------------------------------------------------------------- |
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[5385] | 60 | INTEGER, INTENT(in) :: kt, knt |
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[10375] | 61 | INTEGER :: ji, jj, jk |
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[3443] | 62 | CHARACTER (len=25) :: charout |
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[10375] | 63 | REAL(wp) :: zmax, zfact |
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[3443] | 64 | !!--------------------------------------------------------------------- |
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| 65 | ! |
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[9124] | 66 | IF( ln_timing ) CALL timing_start('p4z_sink') |
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[7646] | 67 | |
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| 68 | ! Initialization of some global variables |
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| 69 | ! --------------------------------------- |
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[7753] | 70 | prodpoc(:,:,:) = 0. |
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| 71 | conspoc(:,:,:) = 0. |
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| 72 | prodgoc(:,:,:) = 0. |
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| 73 | consgoc(:,:,:) = 0. |
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[7646] | 74 | |
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[3443] | 75 | ! |
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| 76 | ! Sinking speeds of detritus is increased with depth as shown |
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| 77 | ! by data and from the coagulation theory |
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| 78 | ! ----------------------------------------------------------- |
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| 79 | DO jk = 1, jpkm1 |
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| 80 | DO jj = 1, jpj |
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| 81 | DO ji = 1,jpi |
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[7646] | 82 | zmax = MAX( heup_01(ji,jj), hmld(ji,jj) ) |
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| 83 | zfact = MAX( 0., gdepw_n(ji,jj,jk+1) - zmax ) / wsbio2scale |
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| 84 | wsbio4(ji,jj,jk) = wsbio2 + MAX(0., ( wsbio2max - wsbio2 )) * zfact |
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[3443] | 85 | END DO |
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| 86 | END DO |
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| 87 | END DO |
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| 88 | |
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| 89 | ! limit the values of the sinking speeds to avoid numerical instabilities |
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[7753] | 90 | wsbio3(:,:,:) = wsbio |
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[7646] | 91 | |
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[3443] | 92 | ! |
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| 93 | ! Initializa to zero all the sinking arrays |
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| 94 | ! ----------------------------------------- |
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[7753] | 95 | sinking (:,:,:) = 0.e0 |
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| 96 | sinking2(:,:,:) = 0.e0 |
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| 97 | sinkcal (:,:,:) = 0.e0 |
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| 98 | sinkfer (:,:,:) = 0.e0 |
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| 99 | sinksil (:,:,:) = 0.e0 |
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| 100 | sinkfer2(:,:,:) = 0.e0 |
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[3443] | 101 | |
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| 102 | ! Compute the sedimentation term using p4zsink2 for all the sinking particles |
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| 103 | ! ----------------------------------------------------- |
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[10375] | 104 | CALL trc_sink( kt, wsbio3, sinking , jppoc, rfact2 ) |
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| 105 | CALL trc_sink( kt, wsbio3, sinkfer , jpsfe, rfact2 ) |
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| 106 | CALL trc_sink( kt, wsbio4, sinking2, jpgoc, rfact2 ) |
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| 107 | CALL trc_sink( kt, wsbio4, sinkfer2, jpbfe, rfact2 ) |
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| 108 | CALL trc_sink( kt, wsbio4, sinksil , jpgsi, rfact2 ) |
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| 109 | CALL trc_sink( kt, wsbio4, sinkcal , jpcal, rfact2 ) |
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[3443] | 110 | |
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[7646] | 111 | IF( ln_p5z ) THEN |
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[7753] | 112 | sinkingn (:,:,:) = 0.e0 |
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| 113 | sinking2n(:,:,:) = 0.e0 |
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| 114 | sinkingp (:,:,:) = 0.e0 |
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| 115 | sinking2p(:,:,:) = 0.e0 |
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[3443] | 116 | |
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[7646] | 117 | ! Compute the sedimentation term using p4zsink2 for all the sinking particles |
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| 118 | ! ----------------------------------------------------- |
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[10375] | 119 | CALL trc_sink( kt, wsbio3, sinkingn , jppon, rfact2 ) |
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| 120 | CALL trc_sink( kt, wsbio3, sinkingp , jppop, rfact2 ) |
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| 121 | CALL trc_sink( kt, wsbio4, sinking2n, jpgon, rfact2 ) |
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| 122 | CALL trc_sink( kt, wsbio4, sinking2p, jpgop, rfact2 ) |
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[7646] | 123 | ENDIF |
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[3443] | 124 | |
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[4996] | 125 | ! Total carbon export per year |
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[5385] | 126 | IF( iom_use( "tcexp" ) .OR. ( ln_check_mass .AND. kt == nitend .AND. knt == nrdttrc ) ) & |
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[10425] | 127 | & t_oce_co2_exp = glob_sum( 'p4zsink', ( sinking(:,:,ik100) + sinking2(:,:,ik100) ) * e1e2t(:,:) * tmask(:,:,1) ) |
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[3481] | 128 | ! |
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[13662] | 129 | IF( lk_iomput .AND. knt == nrdttrc ) THEN |
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| 130 | zfact = 1.e+3 * rfact2r ! conversion from mol/l/kt to mol/m3/s |
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| 131 | ! |
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| 132 | CALL iom_put( "EPC100" , ( sinking(:,:,ik100) + sinking2(:,:,ik100) ) * zfact * tmask(:,:,1) ) ! Export of carbon at 100m |
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| 133 | CALL iom_put( "EPFE100" , ( sinkfer(:,:,ik100) + sinkfer2(:,:,ik100) ) * zfact * tmask(:,:,1) ) ! Export of iron at 100m |
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| 134 | CALL iom_put( "EPCAL100", sinkcal(:,:,ik100) * zfact * tmask(:,:,1) ) ! Export of calcite at 100m |
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| 135 | CALL iom_put( "EPSI100" , sinksil(:,:,ik100) * zfact * tmask(:,:,1) ) ! Export of bigenic silica at 100m |
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| 136 | CALL iom_put( "EXPC" , ( sinking(:,:,:) + sinking2(:,:,:) ) * zfact * tmask(:,:,:) ) ! Export of carbon in the water column |
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| 137 | CALL iom_put( "EXPFE" , ( sinkfer(:,:,:) + sinkfer2(:,:,:) ) * zfact * tmask(:,:,:) ) ! Export of iron |
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| 138 | CALL iom_put( "EXPCAL" , sinkcal(:,:,:) * zfact * tmask(:,:,:) ) ! Export of calcite |
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| 139 | CALL iom_put( "EXPSI" , sinksil(:,:,:) * zfact * tmask(:,:,:) ) ! Export of bigenic silica |
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| 140 | CALL iom_put( "tcexp" , t_oce_co2_exp * zfact ) ! molC/s |
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| 141 | ! |
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[3443] | 142 | ENDIF |
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| 143 | ! |
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| 144 | IF(ln_ctl) THEN ! print mean trends (used for debugging) |
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| 145 | WRITE(charout, FMT="('sink')") |
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| 146 | CALL prt_ctl_trc_info(charout) |
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| 147 | CALL prt_ctl_trc(tab4d=tra, mask=tmask, clinfo=ctrcnm) |
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| 148 | ENDIF |
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| 149 | ! |
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[9124] | 150 | IF( ln_timing ) CALL timing_stop('p4z_sink') |
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[3443] | 151 | ! |
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| 152 | END SUBROUTINE p4z_sink |
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| 153 | |
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[9124] | 154 | |
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[3443] | 155 | SUBROUTINE p4z_sink_init |
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| 156 | !!---------------------------------------------------------------------- |
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| 157 | !! *** ROUTINE p4z_sink_init *** |
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| 158 | !!---------------------------------------------------------------------- |
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[4996] | 159 | INTEGER :: jk |
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[9124] | 160 | !!---------------------------------------------------------------------- |
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| 161 | ! |
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[4996] | 162 | ik100 = 10 ! last level where depth less than 100 m |
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| 163 | DO jk = jpkm1, 1, -1 |
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| 164 | IF( gdept_1d(jk) > 100. ) ik100 = jk - 1 |
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| 165 | END DO |
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| 166 | IF (lwp) WRITE(numout,*) |
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| 167 | IF (lwp) WRITE(numout,*) ' Level corresponding to 100m depth ', ik100 + 1 |
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| 168 | IF (lwp) WRITE(numout,*) |
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| 169 | ! |
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[3481] | 170 | t_oce_co2_exp = 0._wp |
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| 171 | ! |
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[3443] | 172 | END SUBROUTINE p4z_sink_init |
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| 173 | |
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| 174 | INTEGER FUNCTION p4z_sink_alloc() |
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| 175 | !!---------------------------------------------------------------------- |
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| 176 | !! *** ROUTINE p4z_sink_alloc *** |
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| 177 | !!---------------------------------------------------------------------- |
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[10416] | 178 | INTEGER :: ierr(2) |
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[9124] | 179 | !!---------------------------------------------------------------------- |
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| 180 | ! |
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[7646] | 181 | ierr(:) = 0 |
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| 182 | ! |
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| 183 | ALLOCATE( sinking(jpi,jpj,jpk) , sinking2(jpi,jpj,jpk) , & |
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| 184 | & sinkcal(jpi,jpj,jpk) , sinksil (jpi,jpj,jpk) , & |
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| 185 | & sinkfer2(jpi,jpj,jpk) , & |
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| 186 | & sinkfer(jpi,jpj,jpk) , STAT=ierr(1) ) |
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[3443] | 187 | ! |
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[7646] | 188 | IF( ln_p5z ) ALLOCATE( sinkingn(jpi,jpj,jpk), sinking2n(jpi,jpj,jpk) , & |
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[10416] | 189 | & sinkingp(jpi,jpj,jpk), sinking2p(jpi,jpj,jpk) , STAT=ierr(2) ) |
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[7646] | 190 | ! |
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| 191 | p4z_sink_alloc = MAXVAL( ierr ) |
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[10425] | 192 | IF( p4z_sink_alloc /= 0 ) CALL ctl_stop( 'STOP', 'p4z_sink_alloc : failed to allocate arrays.' ) |
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[3443] | 193 | ! |
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| 194 | END FUNCTION p4z_sink_alloc |
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| 195 | |
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| 196 | !!====================================================================== |
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[5656] | 197 | END MODULE p4zsink |
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