[2128] | 1 | MODULE asminc |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE asminc *** |
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| 4 | !! Assimilation increment : Apply an increment generated by data |
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| 5 | !! assimilation |
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| 6 | !!====================================================================== |
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[2392] | 7 | !! History : ! 2007-03 (M. Martin) Met Office version |
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| 8 | !! ! 2007-04 (A. Weaver) calc_date original code |
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| 9 | !! ! 2007-04 (A. Weaver) Merge with OPAVAR/NEMOVAR |
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| 10 | !! NEMO 3.3 ! 2010-05 (D. Lea) Update to work with NEMO v3.2 |
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| 11 | !! - ! 2010-05 (D. Lea) add calc_month_len routine based on day_init |
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| 12 | !!---------------------------------------------------------------------- |
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[2128] | 13 | |
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| 14 | !!---------------------------------------------------------------------- |
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| 15 | !! 'key_asminc' : Switch on the assimilation increment interface |
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| 16 | !!---------------------------------------------------------------------- |
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| 17 | !! asm_inc_init : Initialize the increment arrays and IAU weights |
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| 18 | !! calc_date : Compute the calendar date YYYYMMDD on a given step |
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| 19 | !! tra_asm_inc : Apply the tracer (T and S) increments |
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| 20 | !! dyn_asm_inc : Apply the dynamic (u and v) increments |
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| 21 | !! ssh_asm_inc : Apply the SSH increment |
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| 22 | !!---------------------------------------------------------------------- |
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[2392] | 23 | USE par_oce ! Ocean space and time domain variables |
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| 24 | USE dom_oce ! Ocean space and time domain |
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| 25 | USE oce ! Dynamics and active tracers defined in memory |
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| 26 | USE divcur ! Horizontal divergence and relative vorticity |
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[3032] | 27 | USE ldfdyn_oce ! ocean dynamics: lateral physics |
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[2392] | 28 | USE eosbn2 ! Equation of state - in situ and potential density |
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| 29 | USE zpshde ! Partial step : Horizontal Derivative |
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| 30 | USE iom ! Library to read input files |
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| 31 | USE asmpar ! Parameters for the assmilation interface |
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[2435] | 32 | USE c1d ! 1D initialization |
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[2715] | 33 | USE in_out_manager ! I/O manager |
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| 34 | USE lib_mpp ! MPP library |
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[2128] | 35 | |
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| 36 | IMPLICIT NONE |
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| 37 | PRIVATE |
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[2392] | 38 | |
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| 39 | PUBLIC asm_inc_init !: Initialize the increment arrays and IAU weights |
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| 40 | PUBLIC calc_date !: Compute the calendar date YYYYMMDD on a given step |
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| 41 | PUBLIC tra_asm_inc !: Apply the tracer (T and S) increments |
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| 42 | PUBLIC dyn_asm_inc !: Apply the dynamic (u and v) increments |
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| 43 | PUBLIC ssh_asm_inc !: Apply the SSH increment |
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[2128] | 44 | |
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| 45 | #if defined key_asminc |
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[2392] | 46 | LOGICAL, PUBLIC, PARAMETER :: lk_asminc = .TRUE. !: Logical switch for assimilation increment interface |
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[2128] | 47 | #else |
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[2392] | 48 | LOGICAL, PUBLIC, PARAMETER :: lk_asminc = .FALSE. !: No assimilation increments |
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[2128] | 49 | #endif |
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| 50 | LOGICAL, PUBLIC :: ln_bkgwri = .FALSE. !: No output of the background state fields |
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| 51 | LOGICAL, PUBLIC :: ln_trjwri = .FALSE. !: No output of the state trajectory fields |
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| 52 | LOGICAL, PUBLIC :: ln_asmiau = .FALSE. !: No applying forcing with an assimilation increment |
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| 53 | LOGICAL, PUBLIC :: ln_asmdin = .FALSE. !: No direct initialization |
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| 54 | LOGICAL, PUBLIC :: ln_trainc = .FALSE. !: No tracer (T and S) assimilation increments |
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| 55 | LOGICAL, PUBLIC :: ln_dyninc = .FALSE. !: No dynamics (u and v) assimilation increments |
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| 56 | LOGICAL, PUBLIC :: ln_sshinc = .FALSE. !: No sea surface height assimilation increment |
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| 57 | LOGICAL, PUBLIC :: ln_salfix = .FALSE. !: Apply minimum salinity check |
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[3032] | 58 | INTEGER, PUBLIC :: ndivdmp = 0 !: Apply divergence damping filter ndivdmp times |
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[2128] | 59 | |
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[2392] | 60 | REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE :: t_bkg , s_bkg !: Background temperature and salinity |
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| 61 | REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE :: u_bkg , v_bkg !: Background u- & v- velocity components |
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| 62 | REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE :: t_bkginc, s_bkginc !: Increment to the background T & S |
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| 63 | REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE :: u_bkginc, v_bkginc !: Increment to the u- & v-components |
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| 64 | REAL(wp), PUBLIC, DIMENSION(:) , ALLOCATABLE :: wgtiau !: IAU weights for each time step |
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[2128] | 65 | #if defined key_asminc |
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[2392] | 66 | REAL(wp), PUBLIC, DIMENSION(:,:), ALLOCATABLE :: ssh_iau !: IAU-weighted sea surface height increment |
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[2128] | 67 | #endif |
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[2392] | 68 | ! !!! time steps relative to the cycle interval [0,nitend-nit000-1] |
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| 69 | INTEGER , PUBLIC :: nitbkg !: Time step of the background state used in the Jb term |
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| 70 | INTEGER , PUBLIC :: nitdin !: Time step of the background state for direct initialization |
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| 71 | INTEGER , PUBLIC :: nitiaustr !: Time step of the start of the IAU interval |
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| 72 | INTEGER , PUBLIC :: nitiaufin !: Time step of the end of the IAU interval |
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| 73 | ! |
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| 74 | INTEGER , PUBLIC :: niaufn !: Type of IAU weighing function: = 0 Constant weighting |
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| 75 | ! !: = 1 Linear hat-like, centred in middle of IAU interval |
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| 76 | REAL(wp), PUBLIC :: salfixmin !: Ensure that the salinity is larger than this value if (ln_salfix) |
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[2128] | 77 | |
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[2392] | 78 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: ssh_bkg, ssh_bkginc ! Background sea surface height and its increment |
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[2128] | 79 | |
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[3032] | 80 | !! * Substitutions |
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| 81 | # include "domzgr_substitute.h90" |
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| 82 | # include "ldfdyn_substitute.h90" |
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| 83 | # include "vectopt_loop_substitute.h90" |
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| 84 | |
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[2287] | 85 | !!---------------------------------------------------------------------- |
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| 86 | !! NEMO/OPA 3.3 , NEMO Consortium (2010) |
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| 87 | !! $Id$ |
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[2392] | 88 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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[2287] | 89 | !!---------------------------------------------------------------------- |
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[2128] | 90 | CONTAINS |
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| 91 | |
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| 92 | SUBROUTINE asm_inc_init |
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| 93 | !!---------------------------------------------------------------------- |
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| 94 | !! *** ROUTINE asm_inc_init *** |
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| 95 | !! |
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| 96 | !! ** Purpose : Initialize the assimilation increment and IAU weights. |
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| 97 | !! |
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| 98 | !! ** Method : Initialize the assimilation increment and IAU weights. |
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| 99 | !! |
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| 100 | !! ** Action : |
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| 101 | !!---------------------------------------------------------------------- |
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[3032] | 102 | !! |
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| 103 | USE wrk_nemo, ONLY: wrk_in_use, wrk_not_released, wrk_2d_1 |
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| 104 | USE wrk_nemo, ONLY: hdiv => wrk_2d_1 ! Horizontal divergence |
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| 105 | !! |
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| 106 | INTEGER :: ji,jj,jk |
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[2128] | 107 | INTEGER :: jt |
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| 108 | INTEGER :: imid |
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| 109 | INTEGER :: inum |
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| 110 | INTEGER :: iiauper ! Number of time steps in the IAU period |
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| 111 | INTEGER :: icycper ! Number of time steps in the cycle |
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| 112 | INTEGER :: iitend_date ! Date YYYYMMDD of final time step |
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| 113 | INTEGER :: iitbkg_date ! Date YYYYMMDD of background time step for Jb term |
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| 114 | INTEGER :: iitdin_date ! Date YYYYMMDD of background time step for DI |
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| 115 | INTEGER :: iitiaustr_date ! Date YYYYMMDD of IAU interval start time step |
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| 116 | INTEGER :: iitiaufin_date ! Date YYYYMMDD of IAU interval final time step |
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| 117 | |
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| 118 | REAL(wp) :: znorm ! Normalization factor for IAU weights |
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| 119 | REAL(wp) :: ztotwgt ! Value of time-integrated IAU weights |
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| 120 | ! (should be equal to one) |
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| 121 | REAL(wp) :: z_inc_dateb ! Start date of interval on which increment is valid |
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| 122 | REAL(wp) :: z_inc_datef ! End date of interval on which increment is valid |
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| 123 | REAL(wp) :: zdate_bkg ! Date in background state file for DI |
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| 124 | REAL(wp) :: zdate_inc ! Time axis in increments file |
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[2392] | 125 | !! |
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| 126 | NAMELIST/nam_asminc/ ln_bkgwri, ln_trjwri, & |
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| 127 | & ln_trainc, ln_dyninc, ln_sshinc, & |
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| 128 | & ln_asmdin, ln_asmiau, & |
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| 129 | & nitbkg, nitdin, nitiaustr, nitiaufin, niaufn, & |
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[3032] | 130 | & nittrjfrq, ln_salfix, salfixmin, & |
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| 131 | & ndivdmp |
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[2392] | 132 | !!---------------------------------------------------------------------- |
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[2128] | 133 | |
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| 134 | !----------------------------------------------------------------------- |
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| 135 | ! Read Namelist nam_asminc : assimilation increment interface |
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| 136 | !----------------------------------------------------------------------- |
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| 137 | |
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| 138 | ! Set default values |
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| 139 | ln_bkgwri = .FALSE. |
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| 140 | ln_trjwri = .FALSE. |
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| 141 | ln_trainc = .FALSE. |
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| 142 | ln_dyninc = .FALSE. |
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| 143 | ln_sshinc = .FALSE. |
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| 144 | ln_asmdin = .FALSE. |
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| 145 | ln_asmiau = .TRUE. |
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| 146 | ln_salfix = .FALSE. |
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| 147 | salfixmin = -9999 |
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| 148 | nitbkg = 0 |
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| 149 | nitdin = 0 |
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| 150 | nitiaustr = 1 |
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| 151 | nitiaufin = 150 ! = 10 days with ORCA2 |
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| 152 | niaufn = 0 |
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| 153 | nittrjfrq = 1 |
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| 154 | |
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| 155 | REWIND ( numnam ) |
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| 156 | READ ( numnam, nam_asminc ) |
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| 157 | |
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| 158 | ! Control print |
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| 159 | IF(lwp) THEN |
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| 160 | WRITE(numout,*) |
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| 161 | WRITE(numout,*) 'asm_inc_init : Assimilation increment initialization :' |
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| 162 | WRITE(numout,*) '~~~~~~~~~~~~' |
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[2392] | 163 | WRITE(numout,*) ' Namelist namasm : set assimilation increment parameters' |
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| 164 | WRITE(numout,*) ' Logical switch for writing out background state ln_bkgwri = ', ln_bkgwri |
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| 165 | WRITE(numout,*) ' Logical switch for writing out state trajectory ln_trjwri = ', ln_trjwri |
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| 166 | WRITE(numout,*) ' Logical switch for applying tracer increments ln_trainc = ', ln_trainc |
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| 167 | WRITE(numout,*) ' Logical switch for applying velocity increments ln_dyninc = ', ln_dyninc |
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| 168 | WRITE(numout,*) ' Logical switch for applying SSH increments ln_sshinc = ', ln_sshinc |
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| 169 | WRITE(numout,*) ' Logical switch for Direct Initialization (DI) ln_asmdin = ', ln_asmdin |
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| 170 | WRITE(numout,*) ' Logical switch for Incremental Analysis Updating (IAU) ln_asmiau = ', ln_asmiau |
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| 171 | WRITE(numout,*) ' Timestep of background in [0,nitend-nit000-1] nitbkg = ', nitbkg |
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| 172 | WRITE(numout,*) ' Timestep of background for DI in [0,nitend-nit000-1] nitdin = ', nitdin |
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| 173 | WRITE(numout,*) ' Timestep of start of IAU interval in [0,nitend-nit000-1] nitiaustr = ', nitiaustr |
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| 174 | WRITE(numout,*) ' Timestep of end of IAU interval in [0,nitend-nit000-1] nitiaufin = ', nitiaufin |
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| 175 | WRITE(numout,*) ' Type of IAU weighting function niaufn = ', niaufn |
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| 176 | WRITE(numout,*) ' Frequency of trajectory output for 4D-VAR nittrjfrq = ', nittrjfrq |
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| 177 | WRITE(numout,*) ' Logical switch for ensuring that the sa > salfixmin ln_salfix = ', ln_salfix |
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| 178 | WRITE(numout,*) ' Minimum salinity after applying the increments salfixmin = ', salfixmin |
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[2128] | 179 | ENDIF |
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| 180 | |
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| 181 | nitbkg_r = nitbkg + nit000 - 1 ! Background time referenced to nit000 |
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| 182 | nitdin_r = nitdin + nit000 - 1 ! Background time for DI referenced to nit000 |
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| 183 | nitiaustr_r = nitiaustr + nit000 - 1 ! Start of IAU interval referenced to nit000 |
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| 184 | nitiaufin_r = nitiaufin + nit000 - 1 ! End of IAU interval referenced to nit000 |
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| 185 | |
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| 186 | iiauper = nitiaufin_r - nitiaustr_r + 1 ! IAU interval length |
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| 187 | icycper = nitend - nit000 + 1 ! Cycle interval length |
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| 188 | |
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| 189 | ! Date of final time step |
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| 190 | CALL calc_date( nit000, nitend, ndate0, iitend_date ) |
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| 191 | |
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| 192 | ! Background time for Jb referenced to ndate0 |
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| 193 | CALL calc_date( nit000, nitbkg_r, ndate0, iitbkg_date ) |
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| 194 | |
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| 195 | ! Background time for DI referenced to ndate0 |
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| 196 | CALL calc_date( nit000, nitdin_r, ndate0, iitdin_date ) |
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| 197 | |
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| 198 | ! IAU start time referenced to ndate0 |
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| 199 | CALL calc_date( nit000, nitiaustr_r, ndate0, iitiaustr_date ) |
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| 200 | |
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| 201 | ! IAU end time referenced to ndate0 |
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| 202 | CALL calc_date( nit000, nitiaufin_r, ndate0, iitiaufin_date ) |
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| 203 | |
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| 204 | IF(lwp) THEN |
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| 205 | WRITE(numout,*) |
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| 206 | WRITE(numout,*) ' Time steps referenced to current cycle:' |
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| 207 | WRITE(numout,*) ' iitrst = ', nit000 - 1 |
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| 208 | WRITE(numout,*) ' nit000 = ', nit000 |
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| 209 | WRITE(numout,*) ' nitend = ', nitend |
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| 210 | WRITE(numout,*) ' nitbkg_r = ', nitbkg_r |
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| 211 | WRITE(numout,*) ' nitdin_r = ', nitdin_r |
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| 212 | WRITE(numout,*) ' nitiaustr_r = ', nitiaustr_r |
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| 213 | WRITE(numout,*) ' nitiaufin_r = ', nitiaufin_r |
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| 214 | WRITE(numout,*) ' nittrjfrq = ', nittrjfrq |
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| 215 | WRITE(numout,*) |
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| 216 | WRITE(numout,*) ' Dates referenced to current cycle:' |
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| 217 | WRITE(numout,*) ' ndastp = ', ndastp |
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| 218 | WRITE(numout,*) ' ndate0 = ', ndate0 |
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| 219 | WRITE(numout,*) ' iitend_date = ', iitend_date |
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| 220 | WRITE(numout,*) ' iitbkg_date = ', iitbkg_date |
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| 221 | WRITE(numout,*) ' iitdin_date = ', iitdin_date |
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| 222 | WRITE(numout,*) ' iitiaustr_date = ', iitiaustr_date |
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| 223 | WRITE(numout,*) ' iitiaufin_date = ', iitiaufin_date |
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| 224 | ENDIF |
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| 225 | |
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| 226 | IF ( nacc /= 0 ) & |
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| 227 | & CALL ctl_stop( ' nacc /= 0 and key_asminc :', & |
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| 228 | & ' Assimilation increments have only been implemented', & |
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| 229 | & ' for synchronous time stepping' ) |
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| 230 | |
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| 231 | IF ( ( ln_asmdin ).AND.( ln_asmiau ) ) & |
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| 232 | & CALL ctl_stop( ' ln_asmdin and ln_asmiau :', & |
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| 233 | & ' Choose Direct Initialization OR Incremental Analysis Updating') |
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| 234 | |
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| 235 | IF ( ( ( .NOT. ln_asmdin ).AND.( .NOT. ln_asmiau ) ) & |
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| 236 | .AND.( ( ln_trainc ).OR.( ln_dyninc ).OR.( ln_sshinc ) ) ) & |
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| 237 | & CALL ctl_stop( ' One or more of ln_trainc, ln_dyninc and ln_sshinc is set to .true.', & |
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| 238 | & ' but ln_asmdin and ln_asmiau are both set to .false. :', & |
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| 239 | & ' Inconsistent options') |
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| 240 | |
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| 241 | IF ( ( ln_bkgwri ).AND.( ( ln_asmdin ).OR.( ln_asmiau ) ) ) & |
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| 242 | & CALL ctl_stop( ' ln_bkgwri and either ln_asmdin or ln_asmiau are set to .true.:', & |
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| 243 | & ' The background state must be written before applying the increments') |
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| 244 | |
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| 245 | IF ( ( niaufn /= 0 ).AND.( niaufn /= 1 ) ) & |
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| 246 | & CALL ctl_stop( ' niaufn /= 0 or niaufn /=1 :', & |
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| 247 | & ' Type IAU weighting function is invalid') |
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| 248 | |
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| 249 | IF ( ( .NOT. ln_trainc ).AND.( .NOT. ln_dyninc ).AND.( .NOT. ln_sshinc ) & |
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| 250 | & ) & |
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| 251 | & CALL ctl_warn( ' ln_trainc, ln_dyninc and ln_sshinc are set to .false. :', & |
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| 252 | & ' The assimilation increments are not applied') |
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| 253 | |
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| 254 | IF ( ( ln_asmiau ).AND.( nitiaustr == nitiaufin ) ) & |
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| 255 | & CALL ctl_stop( ' nitiaustr = nitiaufin :', & |
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| 256 | & ' IAU interval is of zero length') |
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| 257 | |
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| 258 | IF ( ( ln_asmiau ).AND.( ( nitiaustr_r < nit000 ).OR.( nitiaufin_r > nitend ) ) ) & |
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| 259 | & CALL ctl_stop( ' nitiaustr or nitiaufin :', & |
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| 260 | & ' IAU starting or final time step is outside the cycle interval', & |
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| 261 | & ' Valid range nit000 to nitend') |
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| 262 | |
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| 263 | IF ( ( nitbkg_r < nit000 - 1 ).OR.( nitbkg_r > nitend ) ) & |
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| 264 | & CALL ctl_stop( ' nitbkg :', & |
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| 265 | & ' Background time step is outside the cycle interval') |
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| 266 | |
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| 267 | IF ( ( nitdin_r < nit000 - 1 ).OR.( nitdin_r > nitend ) ) & |
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| 268 | & CALL ctl_stop( ' nitdin :', & |
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| 269 | & ' Background time step for Direct Initialization is outside', & |
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| 270 | & ' the cycle interval') |
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| 271 | |
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| 272 | IF ( nstop > 0 ) RETURN ! if there are any errors then go no further |
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| 273 | |
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| 274 | !-------------------------------------------------------------------- |
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| 275 | ! Initialize the Incremental Analysis Updating weighting function |
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| 276 | !-------------------------------------------------------------------- |
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| 277 | |
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| 278 | IF ( ln_asmiau ) THEN |
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| 279 | |
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| 280 | ALLOCATE( wgtiau( icycper ) ) |
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| 281 | |
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| 282 | wgtiau(:) = 0.0 |
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| 283 | |
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| 284 | IF ( niaufn == 0 ) THEN |
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| 285 | |
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| 286 | !--------------------------------------------------------- |
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| 287 | ! Constant IAU forcing |
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| 288 | !--------------------------------------------------------- |
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| 289 | |
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| 290 | DO jt = 1, iiauper |
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| 291 | wgtiau(jt+nitiaustr-1) = 1.0 / REAL( iiauper ) |
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| 292 | END DO |
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| 293 | |
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| 294 | ELSEIF ( niaufn == 1 ) THEN |
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| 295 | |
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| 296 | !--------------------------------------------------------- |
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| 297 | ! Linear hat-like, centred in middle of IAU interval |
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| 298 | !--------------------------------------------------------- |
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| 299 | |
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| 300 | ! Compute the normalization factor |
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| 301 | znorm = 0.0 |
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| 302 | IF ( MOD( iiauper, 2 ) == 0 ) THEN ! Even number of time steps in IAU interval |
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| 303 | imid = iiauper / 2 |
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| 304 | DO jt = 1, imid |
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| 305 | znorm = znorm + REAL( jt ) |
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| 306 | END DO |
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| 307 | znorm = 2.0 * znorm |
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| 308 | ELSE ! Odd number of time steps in IAU interval |
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| 309 | imid = ( iiauper + 1 ) / 2 |
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| 310 | DO jt = 1, imid - 1 |
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| 311 | znorm = znorm + REAL( jt ) |
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| 312 | END DO |
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| 313 | znorm = 2.0 * znorm + REAL( imid ) |
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| 314 | ENDIF |
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| 315 | znorm = 1.0 / znorm |
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| 316 | |
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| 317 | DO jt = 1, imid - 1 |
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| 318 | wgtiau(jt+nitiaustr-1) = REAL( jt ) * znorm |
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| 319 | END DO |
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| 320 | DO jt = imid, iiauper |
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| 321 | wgtiau(jt+nitiaustr-1) = REAL( iiauper - jt + 1 ) * znorm |
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| 322 | END DO |
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| 323 | |
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| 324 | ENDIF |
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| 325 | |
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| 326 | ! Test that the integral of the weights over the weighting interval equals 1 |
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| 327 | IF(lwp) THEN |
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| 328 | WRITE(numout,*) |
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| 329 | WRITE(numout,*) 'asm_inc_init : IAU weights' |
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| 330 | WRITE(numout,*) '~~~~~~~~~~~~' |
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| 331 | WRITE(numout,*) ' time step IAU weight' |
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| 332 | WRITE(numout,*) ' ========= =====================' |
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| 333 | ztotwgt = 0.0 |
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| 334 | DO jt = 1, icycper |
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| 335 | ztotwgt = ztotwgt + wgtiau(jt) |
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| 336 | WRITE(numout,*) ' ', jt, ' ', wgtiau(jt) |
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| 337 | END DO |
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| 338 | WRITE(numout,*) ' ===================================' |
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| 339 | WRITE(numout,*) ' Time-integrated weight = ', ztotwgt |
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| 340 | WRITE(numout,*) ' ===================================' |
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| 341 | ENDIF |
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| 342 | |
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| 343 | ENDIF |
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| 344 | |
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| 345 | !-------------------------------------------------------------------- |
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| 346 | ! Allocate and initialize the increment arrays |
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| 347 | !-------------------------------------------------------------------- |
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| 348 | |
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| 349 | ALLOCATE( t_bkginc(jpi,jpj,jpk) ) |
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| 350 | ALLOCATE( s_bkginc(jpi,jpj,jpk) ) |
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| 351 | ALLOCATE( u_bkginc(jpi,jpj,jpk) ) |
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| 352 | ALLOCATE( v_bkginc(jpi,jpj,jpk) ) |
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| 353 | ALLOCATE( ssh_bkginc(jpi,jpj) ) |
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| 354 | #if defined key_asminc |
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| 355 | ALLOCATE( ssh_iau(jpi,jpj) ) |
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| 356 | #endif |
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| 357 | t_bkginc(:,:,:) = 0.0 |
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| 358 | s_bkginc(:,:,:) = 0.0 |
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| 359 | u_bkginc(:,:,:) = 0.0 |
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| 360 | v_bkginc(:,:,:) = 0.0 |
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| 361 | ssh_bkginc(:,:) = 0.0 |
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| 362 | #if defined key_asminc |
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| 363 | ssh_iau(:,:) = 0.0 |
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| 364 | #endif |
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| 365 | IF ( ( ln_trainc ).OR.( ln_dyninc ).OR.( ln_sshinc ) ) THEN |
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| 366 | |
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| 367 | !-------------------------------------------------------------------- |
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| 368 | ! Read the increments from file |
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| 369 | !-------------------------------------------------------------------- |
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| 370 | |
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| 371 | CALL iom_open( c_asminc, inum ) |
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| 372 | |
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| 373 | CALL iom_get( inum, 'time', zdate_inc ) |
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| 374 | |
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| 375 | CALL iom_get( inum, 'z_inc_dateb', z_inc_dateb ) |
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| 376 | CALL iom_get( inum, 'z_inc_datef', z_inc_datef ) |
---|
| 377 | z_inc_dateb = zdate_inc |
---|
| 378 | z_inc_datef = zdate_inc |
---|
| 379 | |
---|
| 380 | IF(lwp) THEN |
---|
| 381 | WRITE(numout,*) |
---|
| 382 | WRITE(numout,*) 'asm_inc_init : Assimilation increments valid ', & |
---|
| 383 | & ' between dates ', NINT( z_inc_dateb ),' and ', & |
---|
| 384 | & NINT( z_inc_datef ) |
---|
| 385 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
| 386 | ENDIF |
---|
| 387 | |
---|
| 388 | IF ( ( NINT( z_inc_dateb ) < ndastp ) & |
---|
| 389 | & .OR.( NINT( z_inc_datef ) > iitend_date ) ) & |
---|
| 390 | & CALL ctl_warn( ' Validity time of assimilation increments is ', & |
---|
| 391 | & ' outside the assimilation interval' ) |
---|
| 392 | |
---|
| 393 | IF ( ( ln_asmdin ).AND.( NINT( zdate_inc ) /= iitdin_date ) ) & |
---|
| 394 | & CALL ctl_warn( ' Validity time of assimilation increments does ', & |
---|
| 395 | & ' not agree with Direct Initialization time' ) |
---|
| 396 | |
---|
| 397 | IF ( ln_trainc ) THEN |
---|
| 398 | CALL iom_get( inum, jpdom_autoglo, 'bckint', t_bkginc, 1 ) |
---|
| 399 | CALL iom_get( inum, jpdom_autoglo, 'bckins', s_bkginc, 1 ) |
---|
| 400 | ! Apply the masks |
---|
| 401 | t_bkginc(:,:,:) = t_bkginc(:,:,:) * tmask(:,:,:) |
---|
| 402 | s_bkginc(:,:,:) = s_bkginc(:,:,:) * tmask(:,:,:) |
---|
| 403 | ! Set missing increments to 0.0 rather than 1e+20 |
---|
| 404 | ! to allow for differences in masks |
---|
| 405 | WHERE( ABS( t_bkginc(:,:,:) ) > 1.0e+10 ) t_bkginc(:,:,:) = 0.0 |
---|
| 406 | WHERE( ABS( s_bkginc(:,:,:) ) > 1.0e+10 ) s_bkginc(:,:,:) = 0.0 |
---|
| 407 | ENDIF |
---|
| 408 | |
---|
| 409 | IF ( ln_dyninc ) THEN |
---|
| 410 | CALL iom_get( inum, jpdom_autoglo, 'bckinu', u_bkginc, 1 ) |
---|
| 411 | CALL iom_get( inum, jpdom_autoglo, 'bckinv', v_bkginc, 1 ) |
---|
| 412 | ! Apply the masks |
---|
| 413 | u_bkginc(:,:,:) = u_bkginc(:,:,:) * umask(:,:,:) |
---|
| 414 | v_bkginc(:,:,:) = v_bkginc(:,:,:) * vmask(:,:,:) |
---|
| 415 | ! Set missing increments to 0.0 rather than 1e+20 |
---|
| 416 | ! to allow for differences in masks |
---|
| 417 | WHERE( ABS( u_bkginc(:,:,:) ) > 1.0e+10 ) u_bkginc(:,:,:) = 0.0 |
---|
| 418 | WHERE( ABS( v_bkginc(:,:,:) ) > 1.0e+10 ) v_bkginc(:,:,:) = 0.0 |
---|
| 419 | ENDIF |
---|
| 420 | |
---|
| 421 | IF ( ln_sshinc ) THEN |
---|
| 422 | CALL iom_get( inum, jpdom_autoglo, 'bckineta', ssh_bkginc, 1 ) |
---|
| 423 | ! Apply the masks |
---|
| 424 | ssh_bkginc(:,:) = ssh_bkginc(:,:) * tmask(:,:,1) |
---|
| 425 | ! Set missing increments to 0.0 rather than 1e+20 |
---|
| 426 | ! to allow for differences in masks |
---|
| 427 | WHERE( ABS( ssh_bkginc(:,:) ) > 1.0e+10 ) ssh_bkginc(:,:) = 0.0 |
---|
| 428 | ENDIF |
---|
| 429 | |
---|
| 430 | CALL iom_close( inum ) |
---|
| 431 | |
---|
| 432 | ENDIF |
---|
| 433 | |
---|
| 434 | !----------------------------------------------------------------------- |
---|
[3032] | 435 | ! Apply divergence damping filter |
---|
| 436 | !----------------------------------------------------------------------- |
---|
| 437 | |
---|
| 438 | |
---|
| 439 | IF ( ln_dyninc .AND. ndivdmp.gt.0 ) THEN |
---|
| 440 | |
---|
| 441 | IF( wrk_in_use( 2, 1) ) THEN |
---|
| 442 | CALL ctl_stop('asm_inc_init : requested workspace for divergence unavailable.') |
---|
| 443 | ENDIF |
---|
| 444 | |
---|
| 445 | |
---|
| 446 | DO jt = 1, ndivdmp |
---|
| 447 | |
---|
| 448 | DO jk = 1, jpkm1 |
---|
| 449 | |
---|
| 450 | hdiv(:,:) = 0._wp |
---|
| 451 | |
---|
| 452 | DO jj = 2, jpjm1 |
---|
| 453 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
| 454 | hdiv(ji,jj) = & |
---|
| 455 | ( e2u(ji ,jj)*fse3u(ji ,jj,jk) * u_bkginc(ji ,jj,jk) & |
---|
| 456 | - e2u(ji-1,jj)*fse3u(ji-1,jj,jk) * u_bkginc(ji-1,jj,jk) & |
---|
| 457 | + e1v(ji,jj )*fse3v(ji,jj ,jk) * v_bkginc(ji,jj ,jk) & |
---|
| 458 | - e1v(ji,jj-1)*fse3v(ji,jj-1,jk) * v_bkginc(ji,jj-1,jk) ) & |
---|
| 459 | / ( e1t(ji,jj) * e2t(ji,jj) * fse3t(ji,jj,jk) ) |
---|
| 460 | END DO |
---|
| 461 | END DO |
---|
| 462 | |
---|
| 463 | CALL lbc_lnk( hdiv, 'T', 1. ) ! lateral boundary cond. (no sign change) |
---|
| 464 | |
---|
| 465 | DO jj = 2, jpjm1 |
---|
| 466 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
| 467 | u_bkginc(ji,jj,jk) = u_bkginc(ji,jj,jk) + 0.2 * ( e1t(ji+1,jj)*e2t(ji+1,jj) * hdiv(ji+1,jj) & |
---|
| 468 | - e1t(ji ,jj)*e2t(ji ,jj) * hdiv(ji ,jj) ) & |
---|
| 469 | / e1u(ji,jj) * umask(ji,jj,jk) |
---|
| 470 | v_bkginc(ji,jj,jk) = v_bkginc(ji,jj,jk) + 0.2 * ( e1t(ji,jj+1)*e2t(ji,jj+1) * hdiv(ji,jj+1) & |
---|
| 471 | - e1t(ji,jj )*e2t(ji,jj ) * hdiv(ji,jj ) ) & |
---|
| 472 | / e2v(ji,jj) * vmask(ji,jj,jk) |
---|
| 473 | END DO |
---|
| 474 | END DO |
---|
| 475 | |
---|
| 476 | END DO |
---|
| 477 | |
---|
| 478 | END DO |
---|
| 479 | |
---|
| 480 | IF( wrk_not_released( 2, 1) ) THEN |
---|
| 481 | CALL ctl_stop('asm_inc_init : failed to release divergence') |
---|
| 482 | ENDIF |
---|
| 483 | |
---|
| 484 | ENDIF |
---|
| 485 | |
---|
| 486 | |
---|
| 487 | |
---|
| 488 | !----------------------------------------------------------------------- |
---|
[2128] | 489 | ! Allocate and initialize the background state arrays |
---|
| 490 | !----------------------------------------------------------------------- |
---|
| 491 | |
---|
| 492 | IF ( ln_asmdin ) THEN |
---|
| 493 | |
---|
| 494 | ALLOCATE( t_bkg(jpi,jpj,jpk) ) |
---|
| 495 | ALLOCATE( s_bkg(jpi,jpj,jpk) ) |
---|
| 496 | ALLOCATE( u_bkg(jpi,jpj,jpk) ) |
---|
| 497 | ALLOCATE( v_bkg(jpi,jpj,jpk) ) |
---|
| 498 | ALLOCATE( ssh_bkg(jpi,jpj) ) |
---|
| 499 | |
---|
| 500 | t_bkg(:,:,:) = 0.0 |
---|
| 501 | s_bkg(:,:,:) = 0.0 |
---|
| 502 | u_bkg(:,:,:) = 0.0 |
---|
| 503 | v_bkg(:,:,:) = 0.0 |
---|
| 504 | ssh_bkg(:,:) = 0.0 |
---|
| 505 | |
---|
| 506 | !-------------------------------------------------------------------- |
---|
| 507 | ! Read from file the background state at analysis time |
---|
| 508 | !-------------------------------------------------------------------- |
---|
| 509 | |
---|
| 510 | CALL iom_open( c_asmdin, inum ) |
---|
| 511 | |
---|
| 512 | CALL iom_get( inum, 'zdate', zdate_bkg ) |
---|
| 513 | |
---|
| 514 | IF(lwp) THEN |
---|
| 515 | WRITE(numout,*) |
---|
| 516 | WRITE(numout,*) 'asm_inc_init : Assimilation background state valid at : ', & |
---|
| 517 | & NINT( zdate_bkg ) |
---|
| 518 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
| 519 | ENDIF |
---|
| 520 | |
---|
| 521 | IF ( NINT( zdate_bkg ) /= iitdin_date ) & |
---|
| 522 | & CALL ctl_warn( ' Validity time of assimilation background state does', & |
---|
| 523 | & ' not agree with Direct Initialization time' ) |
---|
| 524 | |
---|
| 525 | IF ( ln_trainc ) THEN |
---|
| 526 | CALL iom_get( inum, jpdom_autoglo, 'tn', t_bkg ) |
---|
| 527 | CALL iom_get( inum, jpdom_autoglo, 'sn', s_bkg ) |
---|
| 528 | t_bkg(:,:,:) = t_bkg(:,:,:) * tmask(:,:,:) |
---|
| 529 | s_bkg(:,:,:) = s_bkg(:,:,:) * tmask(:,:,:) |
---|
| 530 | ENDIF |
---|
| 531 | |
---|
| 532 | IF ( ln_dyninc ) THEN |
---|
| 533 | CALL iom_get( inum, jpdom_autoglo, 'un', u_bkg ) |
---|
| 534 | CALL iom_get( inum, jpdom_autoglo, 'vn', v_bkg ) |
---|
| 535 | u_bkg(:,:,:) = u_bkg(:,:,:) * umask(:,:,:) |
---|
| 536 | v_bkg(:,:,:) = v_bkg(:,:,:) * vmask(:,:,:) |
---|
| 537 | ENDIF |
---|
| 538 | |
---|
| 539 | IF ( ln_sshinc ) THEN |
---|
| 540 | CALL iom_get( inum, jpdom_autoglo, 'sshn', ssh_bkg ) |
---|
| 541 | ssh_bkg(:,:) = ssh_bkg(:,:) * tmask(:,:,1) |
---|
| 542 | ENDIF |
---|
| 543 | |
---|
| 544 | CALL iom_close( inum ) |
---|
| 545 | |
---|
| 546 | ENDIF |
---|
[2392] | 547 | ! |
---|
[2128] | 548 | END SUBROUTINE asm_inc_init |
---|
| 549 | |
---|
[2392] | 550 | |
---|
[2128] | 551 | SUBROUTINE calc_date( kit000, kt, kdate0, kdate ) |
---|
| 552 | !!---------------------------------------------------------------------- |
---|
| 553 | !! *** ROUTINE calc_date *** |
---|
| 554 | !! |
---|
| 555 | !! ** Purpose : Compute the calendar date YYYYMMDD at a given time step. |
---|
| 556 | !! |
---|
| 557 | !! ** Method : Compute the calendar date YYYYMMDD at a given time step. |
---|
| 558 | !! |
---|
| 559 | !! ** Action : |
---|
| 560 | !!---------------------------------------------------------------------- |
---|
| 561 | INTEGER, INTENT(IN) :: kit000 ! Initial time step |
---|
| 562 | INTEGER, INTENT(IN) :: kt ! Current time step referenced to kit000 |
---|
| 563 | INTEGER, INTENT(IN) :: kdate0 ! Initial date |
---|
| 564 | INTEGER, INTENT(OUT) :: kdate ! Current date reference to kdate0 |
---|
[2392] | 565 | ! |
---|
[2128] | 566 | INTEGER :: iyea0 ! Initial year |
---|
| 567 | INTEGER :: imon0 ! Initial month |
---|
| 568 | INTEGER :: iday0 ! Initial day |
---|
| 569 | INTEGER :: iyea ! Current year |
---|
| 570 | INTEGER :: imon ! Current month |
---|
| 571 | INTEGER :: iday ! Current day |
---|
| 572 | INTEGER :: idaystp ! Number of days between initial and current date |
---|
| 573 | INTEGER :: idaycnt ! Day counter |
---|
| 574 | |
---|
| 575 | INTEGER, DIMENSION(12) :: imonth_len !: length in days of the months of the current year |
---|
| 576 | |
---|
| 577 | !----------------------------------------------------------------------- |
---|
| 578 | ! Compute the calendar date YYYYMMDD |
---|
| 579 | !----------------------------------------------------------------------- |
---|
| 580 | |
---|
| 581 | ! Initial date |
---|
| 582 | iyea0 = kdate0 / 10000 |
---|
| 583 | imon0 = ( kdate0 - ( iyea0 * 10000 ) ) / 100 |
---|
| 584 | iday0 = kdate0 - ( iyea0 * 10000 ) - ( imon0 * 100 ) |
---|
| 585 | |
---|
| 586 | ! Check that kt >= kit000 - 1 |
---|
| 587 | IF ( kt < kit000 - 1 ) CALL ctl_stop( ' kt must be >= kit000 - 1') |
---|
| 588 | |
---|
| 589 | ! If kt = kit000 - 1 then set the date to the restart date |
---|
| 590 | IF ( kt == kit000 - 1 ) THEN |
---|
| 591 | |
---|
| 592 | kdate = ndastp |
---|
| 593 | RETURN |
---|
| 594 | |
---|
| 595 | ENDIF |
---|
| 596 | |
---|
| 597 | ! Compute the number of days from the initial date |
---|
| 598 | idaystp = INT( REAL( kt - kit000 ) * rdt / 86400. ) |
---|
| 599 | |
---|
| 600 | iday = iday0 |
---|
| 601 | imon = imon0 |
---|
| 602 | iyea = iyea0 |
---|
| 603 | idaycnt = 0 |
---|
| 604 | |
---|
| 605 | CALL calc_month_len( iyea, imonth_len ) |
---|
| 606 | |
---|
| 607 | DO WHILE ( idaycnt < idaystp ) |
---|
| 608 | iday = iday + 1 |
---|
| 609 | IF ( iday > imonth_len(imon) ) THEN |
---|
| 610 | iday = 1 |
---|
| 611 | imon = imon + 1 |
---|
| 612 | ENDIF |
---|
| 613 | IF ( imon > 12 ) THEN |
---|
| 614 | imon = 1 |
---|
| 615 | iyea = iyea + 1 |
---|
| 616 | CALL calc_month_len( iyea, imonth_len ) ! update month lengths |
---|
| 617 | ENDIF |
---|
| 618 | idaycnt = idaycnt + 1 |
---|
| 619 | END DO |
---|
[2392] | 620 | ! |
---|
[2128] | 621 | kdate = iyea * 10000 + imon * 100 + iday |
---|
[2392] | 622 | ! |
---|
[2128] | 623 | END SUBROUTINE |
---|
| 624 | |
---|
[2392] | 625 | |
---|
[2128] | 626 | SUBROUTINE calc_month_len( iyear, imonth_len ) |
---|
| 627 | !!---------------------------------------------------------------------- |
---|
| 628 | !! *** ROUTINE calc_month_len *** |
---|
| 629 | !! |
---|
| 630 | !! ** Purpose : Compute the number of days in a months given a year. |
---|
| 631 | !! |
---|
| 632 | !! ** Method : |
---|
| 633 | !!---------------------------------------------------------------------- |
---|
| 634 | INTEGER, DIMENSION(12) :: imonth_len !: length in days of the months of the current year |
---|
| 635 | INTEGER :: iyear !: year |
---|
[2392] | 636 | !!---------------------------------------------------------------------- |
---|
| 637 | ! |
---|
[2128] | 638 | ! length of the month of the current year (from nleapy, read in namelist) |
---|
| 639 | IF ( nleapy < 2 ) THEN |
---|
| 640 | imonth_len(:) = (/ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 /) |
---|
| 641 | IF ( nleapy == 1 ) THEN ! we are using calendar with leap years |
---|
| 642 | IF ( MOD(iyear, 4) == 0 .AND. ( MOD(iyear, 400) == 0 .OR. MOD(iyear, 100) /= 0 ) ) THEN |
---|
| 643 | imonth_len(2) = 29 |
---|
| 644 | ENDIF |
---|
| 645 | ENDIF |
---|
| 646 | ELSE |
---|
| 647 | imonth_len(:) = nleapy ! all months with nleapy days per year |
---|
| 648 | ENDIF |
---|
[2392] | 649 | ! |
---|
[2128] | 650 | END SUBROUTINE |
---|
| 651 | |
---|
[2392] | 652 | |
---|
[2128] | 653 | SUBROUTINE tra_asm_inc( kt ) |
---|
| 654 | !!---------------------------------------------------------------------- |
---|
| 655 | !! *** ROUTINE tra_asm_inc *** |
---|
| 656 | !! |
---|
| 657 | !! ** Purpose : Apply the tracer (T and S) assimilation increments |
---|
| 658 | !! |
---|
| 659 | !! ** Method : Direct initialization or Incremental Analysis Updating |
---|
| 660 | !! |
---|
| 661 | !! ** Action : |
---|
| 662 | !!---------------------------------------------------------------------- |
---|
| 663 | INTEGER, INTENT(IN) :: kt ! Current time step |
---|
[2392] | 664 | ! |
---|
[2128] | 665 | INTEGER :: ji,jj,jk |
---|
| 666 | INTEGER :: it |
---|
| 667 | REAL(wp) :: zincwgt ! IAU weight for current time step |
---|
[2392] | 668 | !!---------------------------------------------------------------------- |
---|
[2128] | 669 | |
---|
| 670 | IF ( ln_asmiau ) THEN |
---|
| 671 | |
---|
| 672 | !-------------------------------------------------------------------- |
---|
| 673 | ! Incremental Analysis Updating |
---|
| 674 | !-------------------------------------------------------------------- |
---|
| 675 | |
---|
| 676 | IF ( ( kt >= nitiaustr_r ).AND.( kt <= nitiaufin_r ) ) THEN |
---|
| 677 | |
---|
| 678 | it = kt - nit000 + 1 |
---|
| 679 | zincwgt = wgtiau(it) / rdt ! IAU weight for the current time step |
---|
| 680 | |
---|
| 681 | IF(lwp) THEN |
---|
| 682 | WRITE(numout,*) |
---|
| 683 | WRITE(numout,*) 'tra_asm_inc : Tracer IAU at time step = ', & |
---|
| 684 | & kt,' with IAU weight = ', wgtiau(it) |
---|
| 685 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
| 686 | ENDIF |
---|
| 687 | |
---|
| 688 | ! Update the tracer tendencies |
---|
| 689 | DO jk = 1, jpkm1 |
---|
[2239] | 690 | tsa(:,:,jk,jp_tem) = tsa(:,:,jk,jp_tem) + t_bkginc(:,:,jk) * zincwgt |
---|
| 691 | tsa(:,:,jk,jp_sal) = tsa(:,:,jk,jp_sal) + s_bkginc(:,:,jk) * zincwgt |
---|
[2128] | 692 | END DO |
---|
| 693 | |
---|
| 694 | ! Salinity fix |
---|
| 695 | IF (ln_salfix) THEN |
---|
| 696 | DO jk = 1, jpkm1 |
---|
| 697 | DO jj = 1, jpj |
---|
| 698 | DO ji= 1, jpi |
---|
[2239] | 699 | tsa(ji,jj,jk,jp_sal) = MAX( tsa(ji,jj,jk,jp_sal), salfixmin ) |
---|
[2128] | 700 | END DO |
---|
| 701 | END DO |
---|
| 702 | END DO |
---|
| 703 | ENDIF |
---|
| 704 | |
---|
| 705 | ENDIF |
---|
| 706 | |
---|
| 707 | IF ( kt == nitiaufin_r + 1 ) THEN ! For bias crcn to work |
---|
| 708 | DEALLOCATE( t_bkginc ) |
---|
| 709 | DEALLOCATE( s_bkginc ) |
---|
| 710 | ENDIF |
---|
| 711 | |
---|
| 712 | |
---|
| 713 | ELSEIF ( ln_asmdin ) THEN |
---|
| 714 | |
---|
| 715 | !-------------------------------------------------------------------- |
---|
| 716 | ! Direct Initialization |
---|
| 717 | !-------------------------------------------------------------------- |
---|
| 718 | |
---|
| 719 | IF ( kt == nitdin_r ) THEN |
---|
| 720 | |
---|
| 721 | neuler = 0 ! Force Euler forward step |
---|
| 722 | |
---|
| 723 | ! Initialize the now fields with the background + increment |
---|
[2239] | 724 | tsn(:,:,:,jp_tem) = t_bkg(:,:,:) + t_bkginc(:,:,:) |
---|
| 725 | tsn(:,:,:,jp_sal) = s_bkg(:,:,:) + s_bkginc(:,:,:) |
---|
[2128] | 726 | |
---|
| 727 | ! Optional salinity fix |
---|
| 728 | IF (ln_salfix) THEN |
---|
| 729 | DO jk = 1, jpkm1 |
---|
| 730 | DO jj = 1, jpj |
---|
| 731 | DO ji= 1, jpi |
---|
[2239] | 732 | tsn(ji,jj,jk,jp_sal) = MAX( tsn(ji,jj,jk,jp_sal), salfixmin ) |
---|
[2128] | 733 | END DO |
---|
| 734 | END DO |
---|
| 735 | END DO |
---|
| 736 | ENDIF |
---|
| 737 | |
---|
[2239] | 738 | tsb(:,:,:,:) = tsn(:,:,:,:) ! Update before fields |
---|
[2128] | 739 | |
---|
[2239] | 740 | CALL eos( tsb, rhd, rhop ) ! Before potential and in situ densities |
---|
[2128] | 741 | |
---|
[2435] | 742 | IF( ln_zps .AND. .NOT. lk_c1d ) & |
---|
[2239] | 743 | & CALL zps_hde( nit000, jpts, tsb, & ! Partial steps: before horizontal derivative |
---|
| 744 | & gtsu, gtsv, rhd, & ! of T, S, rd at the bottom ocean level |
---|
| 745 | & gru , grv ) |
---|
[2128] | 746 | |
---|
| 747 | DEALLOCATE( t_bkginc ) |
---|
| 748 | DEALLOCATE( s_bkginc ) |
---|
| 749 | DEALLOCATE( t_bkg ) |
---|
| 750 | DEALLOCATE( s_bkg ) |
---|
| 751 | ENDIF |
---|
[2392] | 752 | ! |
---|
[2128] | 753 | ENDIF |
---|
[2392] | 754 | ! |
---|
[2128] | 755 | END SUBROUTINE tra_asm_inc |
---|
| 756 | |
---|
[2392] | 757 | |
---|
[2128] | 758 | SUBROUTINE dyn_asm_inc( kt ) |
---|
| 759 | !!---------------------------------------------------------------------- |
---|
| 760 | !! *** ROUTINE dyn_asm_inc *** |
---|
| 761 | !! |
---|
| 762 | !! ** Purpose : Apply the dynamics (u and v) assimilation increments. |
---|
| 763 | !! |
---|
| 764 | !! ** Method : Direct initialization or Incremental Analysis Updating. |
---|
| 765 | !! |
---|
| 766 | !! ** Action : |
---|
| 767 | !!---------------------------------------------------------------------- |
---|
| 768 | INTEGER, INTENT(IN) :: kt ! Current time step |
---|
[2392] | 769 | ! |
---|
[2128] | 770 | INTEGER :: jk |
---|
| 771 | INTEGER :: it |
---|
| 772 | REAL(wp) :: zincwgt ! IAU weight for current time step |
---|
[2392] | 773 | !!---------------------------------------------------------------------- |
---|
[2128] | 774 | |
---|
| 775 | IF ( ln_asmiau ) THEN |
---|
| 776 | |
---|
| 777 | !-------------------------------------------------------------------- |
---|
| 778 | ! Incremental Analysis Updating |
---|
| 779 | !-------------------------------------------------------------------- |
---|
| 780 | |
---|
| 781 | IF ( ( kt >= nitiaustr_r ).AND.( kt <= nitiaufin_r ) ) THEN |
---|
| 782 | |
---|
| 783 | it = kt - nit000 + 1 |
---|
| 784 | zincwgt = wgtiau(it) / rdt ! IAU weight for the current time step |
---|
| 785 | |
---|
| 786 | IF(lwp) THEN |
---|
| 787 | WRITE(numout,*) |
---|
| 788 | WRITE(numout,*) 'dyn_asm_inc : Dynamics IAU at time step = ', & |
---|
| 789 | & kt,' with IAU weight = ', wgtiau(it) |
---|
| 790 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
| 791 | ENDIF |
---|
| 792 | |
---|
| 793 | ! Update the dynamic tendencies |
---|
| 794 | DO jk = 1, jpkm1 |
---|
| 795 | ua(:,:,jk) = ua(:,:,jk) + u_bkginc(:,:,jk) * zincwgt |
---|
| 796 | va(:,:,jk) = va(:,:,jk) + v_bkginc(:,:,jk) * zincwgt |
---|
| 797 | END DO |
---|
| 798 | |
---|
| 799 | IF ( kt == nitiaufin_r ) THEN |
---|
| 800 | DEALLOCATE( u_bkginc ) |
---|
| 801 | DEALLOCATE( v_bkginc ) |
---|
| 802 | ENDIF |
---|
| 803 | |
---|
| 804 | ENDIF |
---|
| 805 | |
---|
| 806 | ELSEIF ( ln_asmdin ) THEN |
---|
| 807 | |
---|
| 808 | !-------------------------------------------------------------------- |
---|
| 809 | ! Direct Initialization |
---|
| 810 | !-------------------------------------------------------------------- |
---|
| 811 | |
---|
| 812 | IF ( kt == nitdin_r ) THEN |
---|
| 813 | |
---|
| 814 | neuler = 0 ! Force Euler forward step |
---|
| 815 | |
---|
| 816 | ! Initialize the now fields with the background + increment |
---|
| 817 | un(:,:,:) = u_bkg(:,:,:) + u_bkginc(:,:,:) |
---|
| 818 | vn(:,:,:) = v_bkg(:,:,:) + v_bkginc(:,:,:) |
---|
| 819 | |
---|
| 820 | ub(:,:,:) = un(:,:,:) ! Update before fields |
---|
| 821 | vb(:,:,:) = vn(:,:,:) |
---|
| 822 | |
---|
[2392] | 823 | CALL div_cur( kt ) ! Compute divergence and curl for now fields |
---|
[2128] | 824 | |
---|
| 825 | rotb (:,:,:) = rotn (:,:,:) ! Update before fields |
---|
| 826 | hdivb(:,:,:) = hdivn(:,:,:) |
---|
| 827 | |
---|
| 828 | DEALLOCATE( u_bkg ) |
---|
| 829 | DEALLOCATE( v_bkg ) |
---|
| 830 | DEALLOCATE( u_bkginc ) |
---|
| 831 | DEALLOCATE( v_bkginc ) |
---|
| 832 | ENDIF |
---|
[2392] | 833 | ! |
---|
[2128] | 834 | ENDIF |
---|
[2392] | 835 | ! |
---|
[2128] | 836 | END SUBROUTINE dyn_asm_inc |
---|
| 837 | |
---|
[2392] | 838 | |
---|
[2128] | 839 | SUBROUTINE ssh_asm_inc( kt ) |
---|
| 840 | !!---------------------------------------------------------------------- |
---|
| 841 | !! *** ROUTINE ssh_asm_inc *** |
---|
| 842 | !! |
---|
| 843 | !! ** Purpose : Apply the sea surface height assimilation increment. |
---|
| 844 | !! |
---|
| 845 | !! ** Method : Direct initialization or Incremental Analysis Updating. |
---|
| 846 | !! |
---|
| 847 | !! ** Action : |
---|
| 848 | !!---------------------------------------------------------------------- |
---|
| 849 | INTEGER, INTENT(IN) :: kt ! Current time step |
---|
[2392] | 850 | ! |
---|
[2128] | 851 | INTEGER :: it |
---|
| 852 | REAL(wp) :: zincwgt ! IAU weight for current time step |
---|
[2392] | 853 | !!---------------------------------------------------------------------- |
---|
[2128] | 854 | |
---|
| 855 | IF ( ln_asmiau ) THEN |
---|
| 856 | |
---|
| 857 | !-------------------------------------------------------------------- |
---|
| 858 | ! Incremental Analysis Updating |
---|
| 859 | !-------------------------------------------------------------------- |
---|
| 860 | |
---|
| 861 | IF ( ( kt >= nitiaustr_r ).AND.( kt <= nitiaufin_r ) ) THEN |
---|
| 862 | |
---|
| 863 | it = kt - nit000 + 1 |
---|
| 864 | zincwgt = wgtiau(it) / rdt ! IAU weight for the current time step |
---|
| 865 | |
---|
| 866 | IF(lwp) THEN |
---|
| 867 | WRITE(numout,*) |
---|
| 868 | WRITE(numout,*) 'ssh_asm_inc : SSH IAU at time step = ', & |
---|
| 869 | & kt,' with IAU weight = ', wgtiau(it) |
---|
| 870 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
| 871 | ENDIF |
---|
| 872 | |
---|
| 873 | ! Save the tendency associated with the IAU weighted SSH increment |
---|
| 874 | ! (applied in dynspg.*) |
---|
| 875 | #if defined key_asminc |
---|
| 876 | ssh_iau(:,:) = ssh_bkginc(:,:) * zincwgt |
---|
| 877 | #endif |
---|
| 878 | IF ( kt == nitiaufin_r ) THEN |
---|
| 879 | DEALLOCATE( ssh_bkginc ) |
---|
| 880 | ENDIF |
---|
| 881 | |
---|
| 882 | ENDIF |
---|
| 883 | |
---|
| 884 | ELSEIF ( ln_asmdin ) THEN |
---|
| 885 | |
---|
| 886 | !-------------------------------------------------------------------- |
---|
| 887 | ! Direct Initialization |
---|
| 888 | !-------------------------------------------------------------------- |
---|
| 889 | |
---|
| 890 | IF ( kt == nitdin_r ) THEN |
---|
| 891 | |
---|
| 892 | neuler = 0 ! Force Euler forward step |
---|
| 893 | |
---|
| 894 | ! Initialize the now fields the background + increment |
---|
| 895 | sshn(:,:) = ssh_bkg(:,:) + ssh_bkginc(:,:) |
---|
| 896 | |
---|
| 897 | sshb(:,:) = sshn(:,:) ! Update before fields |
---|
| 898 | |
---|
| 899 | DEALLOCATE( ssh_bkg ) |
---|
| 900 | DEALLOCATE( ssh_bkginc ) |
---|
| 901 | |
---|
| 902 | ENDIF |
---|
[2392] | 903 | ! |
---|
[2128] | 904 | ENDIF |
---|
[2392] | 905 | ! |
---|
[2128] | 906 | END SUBROUTINE ssh_asm_inc |
---|
| 907 | |
---|
[2392] | 908 | !!====================================================================== |
---|
[2128] | 909 | END MODULE asminc |
---|