[3] | 1 | !!---------------------------------------------------------------------- |
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| 2 | !! *** dtasal_fdir *** |
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| 3 | !!---------------------------------------------------------------------- |
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| 4 | !! dta_sal : read monthly salinity data in direct access file |
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| 5 | !!---------------------------------------------------------------------- |
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| 6 | !! OPA 9.0 , LODYC-IPSL (2003) |
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| 7 | !!---------------------------------------------------------------------- |
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| 8 | |
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| 9 | SUBROUTINE dta_sal( kt ) |
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| 10 | !!---------------------------------------------------------------------- |
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| 11 | !! *** ROUTINE dta_sal *** |
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| 12 | !! |
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| 13 | !! ** Purpose : Reads monthly salinity data |
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| 14 | !! |
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| 15 | !! ** Method : Direct acces file case |
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| 16 | !! Read on unit numsdt the interpolated Levitus salinity onto |
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| 17 | !! the global grid. |
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| 18 | !! The value is centered at the middle of month. |
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| 19 | !! At each time step, a linear interpolation is applied between |
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| 20 | !! two monthly values. |
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| 21 | !! |
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| 22 | !! History : |
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| 23 | !! ! 91-03 () Original code |
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| 24 | !! ! 92-07 (M. Imbard) |
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| 25 | !! 8.5 ! 02-06 (G. Madec) F90: Free form and module |
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| 26 | !!---------------------------------------------------------------------- |
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| 27 | !! * Arguments |
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| 28 | INTEGER, INTENT(in) :: kt ! ocean time step |
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| 29 | |
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| 30 | !! * Local declarations |
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| 31 | INTEGER ,PARAMETER :: jpmois= 12 & ! number on month in file |
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| 32 | & ,jpf = 1 ! number of fields |
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| 33 | INTEGER :: ji,jj,jk,jl,ios, ik |
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| 34 | INTEGER :: imois,iman |
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| 35 | INTEGER :: iimlu,ijmlu,ikmlu,ilmlu,immlu |
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| 36 | INTEGER :: i15, ibloc, ilindta |
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| 37 | REAL(wp) :: zxy, zl |
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| 38 | CHARACTER (len=20) :: cltit |
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| 39 | !!---------------------------------------------------------------------- |
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| 40 | |
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| 41 | |
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| 42 | ! 0. Initialization |
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| 43 | ! ----------------- |
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| 44 | |
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| 45 | iman = jpmois |
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| 46 | i15 = nday/16 |
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| 47 | |
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| 48 | imois = nmonth + i15 - 1 |
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| 49 | IF( imois == 0 ) imois = iman |
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| 50 | |
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| 51 | |
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| 52 | ! 1. First call kt=nit000 |
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| 53 | ! ----------------------- |
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| 54 | |
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| 55 | IF( kt == nit000 .AND. nlecsa == 0 ) THEN |
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| 56 | ! open sal.dta file |
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| 57 | ibloc = 4096 |
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| 58 | ilindta = ibloc*((jpidta*jpjdta*jpbytda-1 )/ibloc+1) |
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| 59 | CALL ctlopn(numsdt,'data_1m_salinity_nomask','OLD', 'UNFORMATTED', 'DIRECT', & |
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| 60 | ilindta,numout,lwp,1) |
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| 61 | nsal1 = 0 |
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| 62 | IF(lwp) THEN |
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| 63 | WRITE(numout,*) |
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| 64 | WRITE(numout,*) 'dta_sal : read monthly salinity in direct acces file in unit= ', numsdt |
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| 65 | WRITE(numout,*) '~~~~~~~ ' |
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| 66 | WRITE(numout,*) |
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| 67 | ENDIF |
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| 68 | |
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| 69 | ! 1.2 Read first records |
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| 70 | |
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| 71 | ! title, dimensions and tests |
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| 72 | |
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| 73 | READ (numsdt,REC=1,IOSTAT=ios) cltit, iimlu, ijmlu, ikmlu, & |
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| 74 | ilmlu, immlu |
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| 75 | IF( ios /= 0 ) THEN |
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| 76 | IF(lwp) WRITE(numout,*) 'e r r o r read numsdt ',ios |
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| 77 | STOP 'dtasal' |
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| 78 | ELSE |
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| 79 | IF ( iimlu /= jpidta ) STOP 4050 |
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| 80 | IF ( ijmlu /= jpjdta ) STOP 4060 |
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| 81 | IF ( ikmlu /= jpk ) STOP 4070 |
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| 82 | IF ( ilmlu /= jpmois ) STOP 4080 |
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| 83 | IF ( immlu /= jpf ) STOP 4090 |
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| 84 | IF(lwp) WRITE(numout,*) 'nb of points in the 5 directions ' |
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| 85 | IF(lwp) WRITE(numout,*) iimlu, ijmlu, ikmlu, ilmlu, immlu |
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| 86 | ENDIF |
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| 87 | |
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| 88 | ENDIF |
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| 89 | |
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| 90 | |
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| 91 | ! 2. Read monthly file |
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| 92 | ! ------------------- |
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| 93 | |
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| 94 | IF( ( kt == nit000 .AND. nlecsa == 0 ) .OR. imois /= nsal1 ) THEN |
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| 95 | nlecsa = 1 |
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| 96 | |
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| 97 | ! 2.1 Calendar computation |
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| 98 | |
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| 99 | nsal1 = imois ! first file record used |
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| 100 | nsal2 = nsal1 + 1 ! last file record used |
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| 101 | nsal1 = MOD( nsal1, iman ) |
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| 102 | IF( nsal1 == 0 ) nsal1 = iman |
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| 103 | nsal2 = MOD( nsal2, iman ) |
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| 104 | IF( nsal2 == 0 ) nsal2 = iman |
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| 105 | IF(lwp) WRITE(numout,*) 'first record file used nsal1 ', nsal1 |
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| 106 | IF(lwp) WRITE(numout,*) 'last record file used nsal2 ', nsal2 |
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| 107 | |
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| 108 | ! 2.3 Read monthly salinity data Levitus |
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| 109 | |
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| 110 | CALL read3d(numsdt,saldta(1,1,1,1),nsal1+1) |
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| 111 | CALL read3d(numsdt,saldta(1,1,1,2),nsal2+1) |
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| 112 | |
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| 113 | IF(lwp) THEN |
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| 114 | WRITE(numout,*) |
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| 115 | WRITE(numout,*) ' read Levitus salinity ok' |
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| 116 | WRITE(numout,*) |
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| 117 | ENDIF |
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| 118 | |
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| 119 | ! 2.4 Masks |
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| 120 | |
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| 121 | DO jl = 1, 2 |
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| 122 | saldta(:,:,:,jl) = saldta(:,:,:,jl)*tmask(:,:,:) |
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| 123 | saldta(:,:,jpk,jl) = 0. |
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| 124 | IF( lk_zps ) THEN ! z-coordinate with partial steps |
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| 125 | DO jj = 1, jpj ! interpolation of salinity at the last ocean level (i.e. the partial step) |
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| 126 | DO ji = 1, jpi |
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| 127 | ik = mbathy(ji,jj) - 1 |
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| 128 | IF( ik > 2 ) THEN |
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| 129 | zl = ( gdept(ik) - fsdept(ji,jj,ik) ) / ( gdept(ik) - gdept(ik-1) ) |
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| 130 | saldta(ji,jj,ik,jl) = (1.-zl) * saldta(ji,jj,ik,jl) +zl * saldta(ji,jj,ik-1,jl) |
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| 131 | ENDIF |
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| 132 | END DO |
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| 133 | END DO |
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| 134 | ENDIF |
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| 135 | END DO |
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| 136 | |
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| 137 | IF(lwp) THEN |
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| 138 | WRITE(numout,*)' salinity Levitus month ',nsal1,nsal2 |
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| 139 | WRITE(numout,*) |
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| 140 | WRITE(numout,*) ' Levitus mounth = ',nsal1,' level = 1' |
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| 141 | CALL prihre(saldta(1,1,1,1),jpi,jpj,1,jpi,20,1,jpj,20,1.,numout) |
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| 142 | WRITE(numout,*) ' Levitus mounth = ',nsal1,' level = ',jpk/2 |
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| 143 | CALL prihre(saldta(1,1,jpk/2,1),jpi,jpj,1,jpi,20,1,jpj,20,1.,numout) |
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| 144 | WRITE(numout,*) ' Levitus mounth = ',nsal1,' level = ',jpkm1 |
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| 145 | CALL prihre(saldta(1,1,jpkm1,1),jpi,jpj,1,jpi,20,1,jpj,20,1.,numout) |
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| 146 | ENDIF |
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| 147 | ENDIF |
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| 148 | |
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| 149 | |
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| 150 | ! 3. At every time step compute salinity data |
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| 151 | ! ---------------------------------------------- |
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| 152 | |
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| 153 | zxy = FLOAT(nday + 15 - 30*i15)/30. |
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| 154 | sdta(:,:,:)= ( (1.-zxy)*saldta(:,:,:,1) + zxy*saldta(:,:,:,2) ) |
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| 155 | |
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| 156 | END SUBROUTINE dta_sal |
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