[3] | 1 | !!---------------------------------------------------------------------- |
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| 2 | !! *** tau_forced_monthly_fdir.h90 *** |
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| 3 | !!---------------------------------------------------------------------- |
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| 4 | |
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| 5 | !!---------------------------------------------------------------------- |
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| 6 | !! tau : update surface stress from monthly mean fields read in |
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| 7 | !! a direct access file |
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| 8 | !!---------------------------------------------------------------------- |
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| 9 | !! * local modules variables |
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| 10 | INTEGER :: & |
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| 11 | numtau = 64, & ! logical unit for the i-component of the wind data |
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| 12 | ntau1, ntau2 ! index of the first and second record used |
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| 13 | CHARACTER (len=32) :: & |
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| 14 | cl_tau = 'tauxy_1m' & |
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| 15 | ! ! name of the monthly direct acces file |
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| 16 | ! ! which containt the 2 surface stress components |
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| 17 | REAL(wp), DIMENSION(jpi,jpj,2,4) :: & |
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| 18 | taudta ! the 2 components of the surface stress (Pascal) |
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| 19 | ! ! at 2 consecutive time-steps in the (i,j) referential |
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| 20 | !!---------------------------------------------------------------------- |
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| 21 | !! OPA 9.0 , LODYC-IPSL (2003) |
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| 22 | !!---------------------------------------------------------------------- |
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| 23 | |
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| 24 | CONTAINS |
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| 25 | |
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| 26 | SUBROUTINE tau( kt ) |
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| 27 | !!--------------------------------------------------------------------- |
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| 28 | !! *** ROUTINE tau *** |
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| 29 | !! |
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| 30 | !! ** Purpose : provide to the ocean the stress at each time step |
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| 31 | !! |
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| 32 | !! ** Method : - Read the 2 monthly surface stress components in a |
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| 33 | !! direct access file at 2 consecutive time-steps |
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| 34 | !! They are given in the (i,j) referential |
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| 35 | !! The i-component is given at U-point (INTERP package) |
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| 36 | !! The j-component is given at V-point (INTERP package) |
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| 37 | !! - a linear time-interpolation is performed to provide |
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| 38 | !! the stress at the kt time-step. |
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| 39 | !! |
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| 40 | !! CAUTION: never mask the surface stress field ! |
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| 41 | !! |
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| 42 | !! ** Action : |
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| 43 | !! update at each time-step the two components of the surface |
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| 44 | !! stress in both (i,j) and geographical referencial |
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| 45 | !! |
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| 46 | !! History : |
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| 47 | !! 4.0 ! 91-03 (G. Madec) Original code |
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| 48 | !! 8.5 ! 02-11 (G. Madec) F90: Free form and module |
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| 49 | !!---------------------------------------------------------------------- |
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| 50 | !! * Arguments |
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| 51 | INTEGER, INTENT( in ) :: kt ! ocean time step |
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| 52 | |
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| 53 | !! * Local declarations |
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| 54 | INTEGER :: ji, jj, ios |
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| 55 | INTEGER :: iimlu, ijmlu, ikmlu, ilmlu, immlu |
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| 56 | INTEGER :: imois, iman |
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| 57 | INTEGER :: i15 |
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| 58 | INTEGER :: ildta,ibloc,ilseq |
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| 59 | |
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| 60 | CHARACTER (len=30) :: cltit |
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| 61 | CHARACTER (len=21) :: clunf, clold, cldir |
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| 62 | |
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| 63 | REAL(wp) :: zxy, zfacto |
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| 64 | REAL(wp), DIMENSION(jpi,jpj) :: ztauxg, ztauyg |
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| 65 | !!--------------------------------------------------------------------- |
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| 66 | |
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| 67 | |
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| 68 | ! 0. Initialization |
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| 69 | ! ----------------- |
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| 70 | ! Open specifier |
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| 71 | |
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| 72 | clold = 'OLD' |
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| 73 | clunf = 'UNFORMATTED' |
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| 74 | cldir = 'DIRECT' |
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| 75 | |
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| 76 | ilseq = 1 |
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| 77 | |
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| 78 | ! computation of the record length for direct access file |
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| 79 | ! this length depend of 4096 (device specification) |
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| 80 | |
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| 81 | ibloc = 4096 |
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| 82 | ildta = ibloc*((jpidta*jpjdta*jpbytda-1 )/ibloc+1) |
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| 83 | |
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| 84 | ! iman=number of dates in data file (12 for a year of monthly values) |
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| 85 | iman = int(raamo) |
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| 86 | |
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| 87 | i15 = INT( 2 * FLOAT( nday ) / ( FLOAT( nobis(nmonth) ) + 0.5 ) ) |
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| 88 | |
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| 89 | imois = nmonth + i15 - 1 |
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| 90 | IF ( imois == 0 ) imois = iman |
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| 91 | |
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| 92 | |
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| 93 | ! 1. first call kt=nit000 |
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| 94 | ! ----------------------- |
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| 95 | |
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| 96 | IF( kt == nit000 ) THEN |
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| 97 | ntau1 = 0 |
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| 98 | IF(lwp) WRITE(numout,*) ' ' |
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| 99 | IF(lwp) WRITE(numout,*) ' tau : monthly stress direct access file' |
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| 100 | IF(lwp) WRITE(numout,*) ' ~~~~~~' |
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| 101 | IF(lwp) WRITE(numout,*) |
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| 102 | IF(lwp) WRITE(numout,*) 'file numtau = ', numtau |
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| 103 | |
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| 104 | ! title, dimensions and tests |
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| 105 | |
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| 106 | CALL ctlopn(numtau, cl_tau, clold, clunf, cldir, ildta, numout, lwp, 1 ) |
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| 107 | READ ( numtau, REC=1, IOSTAT=ios ) cltit, iimlu, ijmlu, ikmlu, ilmlu, immlu |
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| 108 | |
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| 109 | IF(lwp) WRITE(numout,*)' number of points in the 5 directions ' |
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| 110 | IF(lwp) WRITE(numout,*) iimlu, ijmlu, ikmlu, ilmlu, immlu |
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| 111 | ENDIF |
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| 112 | |
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| 113 | |
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| 114 | ! 2. Read monthly file |
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| 115 | ! ------------------- |
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| 116 | |
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| 117 | IF ( kt == nit000 .OR. imois /= ntau1 ) THEN |
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| 118 | |
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| 119 | ! 2.1 calendar computation |
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| 120 | |
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| 121 | ! ntau1 number of the first file record used in the simulation |
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| 122 | ! ntau2 number of the last file record |
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| 123 | |
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| 124 | ntau1 = imois |
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| 125 | ntau2 = ntau1+1 |
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| 126 | ntau1 = mod( ntau1, iman ) |
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| 127 | IF ( ntau1 == 0 ) ntau1 = iman |
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| 128 | ntau2 = MOD( ntau2, iman ) |
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| 129 | IF ( ntau2 == 0 ) ntau2 = iman |
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| 130 | IF(lwp) WRITE(numout,*) 'first record file used ntau1 ', ntau1 |
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| 131 | IF(lwp) WRITE(numout,*) 'last record file used ntau2 ', ntau2 |
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| 132 | |
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| 133 | ! 2.3 Read monthly stress data Hellerman |
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| 134 | |
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| 135 | ! ntau1 |
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| 136 | ! ...Txu |
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| 137 | CALL read2D(numtau,taudta(1,1,1,1),1,6*(ntau1-1)+3) |
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| 138 | ! ...Txv |
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| 139 | CALL read2D(numtau,taudta(1,1,1,2),1,6*(ntau1-1)+4) |
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| 140 | ! ...Tyu |
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| 141 | CALL read2D(numtau,taudta(1,1,1,3),1,6*(ntau1-1)+6) |
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| 142 | ! ...Tyv |
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| 143 | CALL read2D(numtau,taudta(1,1,1,4),1,6*(ntau1-1)+7) |
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| 144 | ! ntau2 |
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| 145 | ! ...Txu |
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| 146 | CALL read2D(numtau,taudta(1,1,2,1),1,6*(ntau2-1)+3) |
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| 147 | ! ...Txv |
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| 148 | CALL read2D(numtau,taudta(1,1,2,2),1,6*(ntau2-1)+4) |
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| 149 | ! ...Tyu |
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| 150 | CALL read2D(numtau,taudta(1,1,2,3),1,6*(ntau2-1)+6) |
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| 151 | ! ...Tyv |
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| 152 | CALL read2D(numtau,taudta(1,1,2,4),1,6*(ntau2-1)+7) |
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| 153 | |
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| 154 | IF(lwp) THEN |
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| 155 | WRITE(numout,*) ' ' |
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| 156 | WRITE(numout,*) ' read Clio stress ok' |
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| 157 | WRITE(numout,*) ' ' |
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| 158 | WRITE(numout,*) ' month: ', ntau1, ' field: 1 multiply by ', 1. |
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| 159 | CALL prihre( taudta(1,1,1,1), jpi, jpj, 1, jpi, 20, 1, jpj, 10, 1., numout ) |
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| 160 | WRITE(numout,*) ' ' |
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| 161 | WRITE(numout,*) ' month: ', ntau2, ' field: 2 multiply by ', 1. |
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| 162 | CALL prihre( taudta(1,1,2,4), jpi, jpj, 1, jpi, 20, 1, jpj, 10, 1., numout ) |
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| 163 | ENDIF |
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| 164 | |
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| 165 | ENDIF |
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| 166 | |
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| 167 | |
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| 168 | ! 4. At every time step compute stress data |
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| 169 | ! ----------------------------------------- |
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| 170 | |
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| 171 | zfacto = 1. |
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| 172 | ! zxy : coefficient for linear interpolation in time |
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| 173 | zxy = FLOAT( nday ) / FLOAT( nobis(ntau1) ) + 0.5 - i15 |
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| 174 | |
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| 175 | ! ...Txu |
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| 176 | tauxg (:,:) = zfacto * ( (1.-zxy) * taudta(:,:,1,1) + zxy * taudta(:,:,2,1) ) |
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| 177 | ! ...Tyu |
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| 178 | tauyg (:,:) = zfacto * ( (1.-zxy) * taudta(:,:,1,3) + zxy * taudta(:,:,2,3) ) |
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| 179 | ! ...Txv |
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| 180 | ztauxg(:,:) = zfacto * ( (1.-zxy) * taudta(:,:,1,2) + zxy * taudta(:,:,2,2) ) |
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| 181 | ! ...Tyv |
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| 182 | ztauyg(:,:) = zfacto * ( (1.-zxy) * taudta(:,:,1,4) + zxy * taudta(:,:,2,4) ) |
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| 183 | |
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| 184 | ! 2.4 changing data grid coordinates --> global grid coordinates |
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| 185 | |
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| 186 | CALL repcmo( tauxg, tauyg, ztauxg, ztauyg, taux, tauy, kt ) |
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| 187 | |
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| 188 | ! 2.5 Save components |
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| 189 | |
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| 190 | tauxg(:,:) = taux(:,:) |
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| 191 | tauyg(:,:) = tauy(:,:) |
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| 192 | |
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| 193 | CALL FLUSH(numout) |
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| 194 | GO TO 412 |
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| 195 | 410 IF(lwp)WRITE(numout,*) 'e r r o r read numtau ', ios |
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| 196 | nstop = nstop +1 |
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| 197 | 412 CONTINUE |
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| 198 | |
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| 199 | END SUBROUTINE tau |
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