[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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[3764] | 12 | !! 3.4 ! 2012-10 (A. Weaver and K. Mogensen) Fix for direct initialization |
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[6140] | 13 | !! ! 2014-09 (D. Lea) Local calc_date removed use routine from OBS |
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| 14 | !! ! 2015-11 (D. Lea) Handle non-zero initial time of day |
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[2392] | 15 | !!---------------------------------------------------------------------- |
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[2128] | 16 | |
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| 17 | !!---------------------------------------------------------------------- |
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[3785] | 18 | !! asm_inc_init : Initialize the increment arrays and IAU weights |
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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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[9023] | 22 | !! ssh_asm_div : Apply divergence associated with SSH increment |
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[3785] | 23 | !! seaice_asm_inc : Apply the seaice increment |
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[2128] | 24 | !!---------------------------------------------------------------------- |
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[9019] | 25 | USE oce ! Dynamics and active tracers defined in memory |
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| 26 | USE par_oce ! Ocean space and time domain variables |
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| 27 | USE dom_oce ! Ocean space and time domain |
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| 28 | USE domvvl ! domain: variable volume level |
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| 29 | USE ldfdyn ! lateral diffusion: eddy viscosity coefficients |
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| 30 | USE eosbn2 ! Equation of state - in situ and potential density |
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| 31 | USE zpshde ! Partial step : Horizontal Derivative |
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| 32 | USE asmpar ! Parameters for the assmilation interface |
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[9254] | 33 | USE asmbkg ! |
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[9019] | 34 | USE c1d ! 1D initialization |
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| 35 | USE sbc_oce ! Surface boundary condition variables. |
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| 36 | USE diaobs , ONLY : calc_date ! Compute the calendar date on a given step |
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[9570] | 37 | #if defined key_si3 |
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[9019] | 38 | USE ice , ONLY : hm_i, at_i, at_i_b |
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[3764] | 39 | #endif |
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[9019] | 40 | ! |
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| 41 | USE in_out_manager ! I/O manager |
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| 42 | USE iom ! Library to read input files |
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| 43 | USE lib_mpp ! MPP library |
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[2128] | 44 | |
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| 45 | IMPLICIT NONE |
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| 46 | PRIVATE |
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[2392] | 47 | |
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| 48 | PUBLIC asm_inc_init !: Initialize the increment arrays and IAU weights |
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| 49 | PUBLIC tra_asm_inc !: Apply the tracer (T and S) increments |
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| 50 | PUBLIC dyn_asm_inc !: Apply the dynamic (u and v) increments |
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| 51 | PUBLIC ssh_asm_inc !: Apply the SSH increment |
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[9023] | 52 | PUBLIC ssh_asm_div !: Apply the SSH divergence |
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[3764] | 53 | PUBLIC seaice_asm_inc !: Apply the seaice increment |
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[2128] | 54 | |
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| 55 | #if defined key_asminc |
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[2392] | 56 | LOGICAL, PUBLIC, PARAMETER :: lk_asminc = .TRUE. !: Logical switch for assimilation increment interface |
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[2128] | 57 | #else |
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[2392] | 58 | LOGICAL, PUBLIC, PARAMETER :: lk_asminc = .FALSE. !: No assimilation increments |
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[2128] | 59 | #endif |
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[5836] | 60 | LOGICAL, PUBLIC :: ln_bkgwri !: No output of the background state fields |
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| 61 | LOGICAL, PUBLIC :: ln_asmiau !: No applying forcing with an assimilation increment |
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| 62 | LOGICAL, PUBLIC :: ln_asmdin !: No direct initialization |
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| 63 | LOGICAL, PUBLIC :: ln_trainc !: No tracer (T and S) assimilation increments |
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| 64 | LOGICAL, PUBLIC :: ln_dyninc !: No dynamics (u and v) assimilation increments |
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| 65 | LOGICAL, PUBLIC :: ln_sshinc !: No sea surface height assimilation increment |
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| 66 | LOGICAL, PUBLIC :: ln_seaiceinc !: No sea ice concentration increment |
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| 67 | LOGICAL, PUBLIC :: ln_salfix !: Apply minimum salinity check |
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[3764] | 68 | LOGICAL, PUBLIC :: ln_temnofreeze = .FALSE. !: Don't allow the temperature to drop below freezing |
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[5836] | 69 | INTEGER, PUBLIC :: nn_divdmp !: Apply divergence damping filter nn_divdmp times |
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[2128] | 70 | |
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[2392] | 71 | REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE :: t_bkg , s_bkg !: Background temperature and salinity |
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| 72 | REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE :: u_bkg , v_bkg !: Background u- & v- velocity components |
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| 73 | REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE :: t_bkginc, s_bkginc !: Increment to the background T & S |
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| 74 | REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE :: u_bkginc, v_bkginc !: Increment to the u- & v-components |
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| 75 | REAL(wp), PUBLIC, DIMENSION(:) , ALLOCATABLE :: wgtiau !: IAU weights for each time step |
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[2128] | 76 | #if defined key_asminc |
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[9213] | 77 | REAL(wp), PUBLIC, DIMENSION(:,:) , ALLOCATABLE :: ssh_iau !: IAU-weighted sea surface height increment |
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[2128] | 78 | #endif |
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[2392] | 79 | ! !!! time steps relative to the cycle interval [0,nitend-nit000-1] |
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| 80 | INTEGER , PUBLIC :: nitbkg !: Time step of the background state used in the Jb term |
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| 81 | INTEGER , PUBLIC :: nitdin !: Time step of the background state for direct initialization |
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| 82 | INTEGER , PUBLIC :: nitiaustr !: Time step of the start of the IAU interval |
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| 83 | INTEGER , PUBLIC :: nitiaufin !: Time step of the end of the IAU interval |
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| 84 | ! |
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| 85 | INTEGER , PUBLIC :: niaufn !: Type of IAU weighing function: = 0 Constant weighting |
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| 86 | ! !: = 1 Linear hat-like, centred in middle of IAU interval |
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| 87 | REAL(wp), PUBLIC :: salfixmin !: Ensure that the salinity is larger than this value if (ln_salfix) |
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[2128] | 88 | |
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[2392] | 89 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: ssh_bkg, ssh_bkginc ! Background sea surface height and its increment |
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[3764] | 90 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: seaice_bkginc ! Increment to the background sea ice conc |
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[8030] | 91 | #if defined key_cice && defined key_asminc |
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| 92 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: ndaice_da ! ice increment tendency into CICE |
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| 93 | #endif |
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[2128] | 94 | |
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[3294] | 95 | !! * Substitutions |
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| 96 | # include "vectopt_loop_substitute.h90" |
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[2287] | 97 | !!---------------------------------------------------------------------- |
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[9598] | 98 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
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[2287] | 99 | !! $Id$ |
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[10068] | 100 | !! Software governed by the CeCILL license (see ./LICENSE) |
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[2287] | 101 | !!---------------------------------------------------------------------- |
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[2128] | 102 | CONTAINS |
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| 103 | |
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| 104 | SUBROUTINE asm_inc_init |
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| 105 | !!---------------------------------------------------------------------- |
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| 106 | !! *** ROUTINE asm_inc_init *** |
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| 107 | !! |
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| 108 | !! ** Purpose : Initialize the assimilation increment and IAU weights. |
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| 109 | !! |
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| 110 | !! ** Method : Initialize the assimilation increment and IAU weights. |
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| 111 | !! |
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| 112 | !! ** Action : |
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| 113 | !!---------------------------------------------------------------------- |
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[4990] | 114 | INTEGER :: ji, jj, jk, jt ! dummy loop indices |
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| 115 | INTEGER :: imid, inum ! local integers |
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| 116 | INTEGER :: ios ! Local integer output status for namelist read |
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[2128] | 117 | INTEGER :: iiauper ! Number of time steps in the IAU period |
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| 118 | INTEGER :: icycper ! Number of time steps in the cycle |
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[6140] | 119 | REAL(KIND=dp) :: ditend_date ! Date YYYYMMDD.HHMMSS of final time step |
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| 120 | REAL(KIND=dp) :: ditbkg_date ! Date YYYYMMDD.HHMMSS of background time step for Jb term |
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| 121 | REAL(KIND=dp) :: ditdin_date ! Date YYYYMMDD.HHMMSS of background time step for DI |
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| 122 | REAL(KIND=dp) :: ditiaustr_date ! Date YYYYMMDD.HHMMSS of IAU interval start time step |
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| 123 | REAL(KIND=dp) :: ditiaufin_date ! Date YYYYMMDD.HHMMSS of IAU interval final time step |
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| 124 | |
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[2128] | 125 | REAL(wp) :: znorm ! Normalization factor for IAU weights |
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[4990] | 126 | REAL(wp) :: ztotwgt ! Value of time-integrated IAU weights (should be equal to one) |
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[2128] | 127 | REAL(wp) :: z_inc_dateb ! Start date of interval on which increment is valid |
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| 128 | REAL(wp) :: z_inc_datef ! End date of interval on which increment is valid |
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| 129 | REAL(wp) :: zdate_bkg ! Date in background state file for DI |
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| 130 | REAL(wp) :: zdate_inc ! Time axis in increments file |
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[4990] | 131 | ! |
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[9019] | 132 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zhdiv ! 2D workspace |
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[2392] | 133 | !! |
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[3764] | 134 | NAMELIST/nam_asminc/ ln_bkgwri, & |
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[2392] | 135 | & ln_trainc, ln_dyninc, ln_sshinc, & |
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| 136 | & ln_asmdin, ln_asmiau, & |
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| 137 | & nitbkg, nitdin, nitiaustr, nitiaufin, niaufn, & |
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[4990] | 138 | & ln_salfix, salfixmin, nn_divdmp |
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[2392] | 139 | !!---------------------------------------------------------------------- |
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[2128] | 140 | |
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| 141 | !----------------------------------------------------------------------- |
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| 142 | ! Read Namelist nam_asminc : assimilation increment interface |
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| 143 | !----------------------------------------------------------------------- |
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[5836] | 144 | ln_seaiceinc = .FALSE. |
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[3764] | 145 | ln_temnofreeze = .FALSE. |
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[2128] | 146 | |
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[4147] | 147 | REWIND( numnam_ref ) ! Namelist nam_asminc in reference namelist : Assimilation increment |
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| 148 | READ ( numnam_ref, nam_asminc, IOSTAT = ios, ERR = 901) |
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[11536] | 149 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nam_asminc in reference namelist' ) |
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[4147] | 150 | REWIND( numnam_cfg ) ! Namelist nam_asminc in configuration namelist : Assimilation increment |
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| 151 | READ ( numnam_cfg, nam_asminc, IOSTAT = ios, ERR = 902 ) |
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[11536] | 152 | 902 IF( ios > 0 ) CALL ctl_nam ( ios , 'nam_asminc in configuration namelist' ) |
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[4624] | 153 | IF(lwm) WRITE ( numond, nam_asminc ) |
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[4147] | 154 | |
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[2128] | 155 | ! Control print |
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| 156 | IF(lwp) THEN |
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| 157 | WRITE(numout,*) |
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| 158 | WRITE(numout,*) 'asm_inc_init : Assimilation increment initialization :' |
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| 159 | WRITE(numout,*) '~~~~~~~~~~~~' |
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[2392] | 160 | WRITE(numout,*) ' Namelist namasm : set assimilation increment parameters' |
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| 161 | WRITE(numout,*) ' Logical switch for writing out background state ln_bkgwri = ', ln_bkgwri |
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| 162 | WRITE(numout,*) ' Logical switch for applying tracer increments ln_trainc = ', ln_trainc |
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| 163 | WRITE(numout,*) ' Logical switch for applying velocity increments ln_dyninc = ', ln_dyninc |
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| 164 | WRITE(numout,*) ' Logical switch for applying SSH increments ln_sshinc = ', ln_sshinc |
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| 165 | WRITE(numout,*) ' Logical switch for Direct Initialization (DI) ln_asmdin = ', ln_asmdin |
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[3764] | 166 | WRITE(numout,*) ' Logical switch for applying sea ice increments ln_seaiceinc = ', ln_seaiceinc |
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[2392] | 167 | WRITE(numout,*) ' Logical switch for Incremental Analysis Updating (IAU) ln_asmiau = ', ln_asmiau |
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| 168 | WRITE(numout,*) ' Timestep of background in [0,nitend-nit000-1] nitbkg = ', nitbkg |
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| 169 | WRITE(numout,*) ' Timestep of background for DI in [0,nitend-nit000-1] nitdin = ', nitdin |
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| 170 | WRITE(numout,*) ' Timestep of start of IAU interval in [0,nitend-nit000-1] nitiaustr = ', nitiaustr |
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| 171 | WRITE(numout,*) ' Timestep of end of IAU interval in [0,nitend-nit000-1] nitiaufin = ', nitiaufin |
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| 172 | WRITE(numout,*) ' Type of IAU weighting function niaufn = ', niaufn |
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| 173 | WRITE(numout,*) ' Logical switch for ensuring that the sa > salfixmin ln_salfix = ', ln_salfix |
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| 174 | WRITE(numout,*) ' Minimum salinity after applying the increments salfixmin = ', salfixmin |
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[2128] | 175 | ENDIF |
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| 176 | |
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[9019] | 177 | nitbkg_r = nitbkg + nit000 - 1 ! Background time referenced to nit000 |
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| 178 | nitdin_r = nitdin + nit000 - 1 ! Background time for DI referenced to nit000 |
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| 179 | nitiaustr_r = nitiaustr + nit000 - 1 ! Start of IAU interval referenced to nit000 |
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| 180 | nitiaufin_r = nitiaufin + nit000 - 1 ! End of IAU interval referenced to nit000 |
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[2128] | 181 | |
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[9019] | 182 | iiauper = nitiaufin_r - nitiaustr_r + 1 ! IAU interval length |
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| 183 | icycper = nitend - nit000 + 1 ! Cycle interval length |
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[2128] | 184 | |
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[9019] | 185 | CALL calc_date( nitend , ditend_date ) ! Date of final time step |
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| 186 | CALL calc_date( nitbkg_r , ditbkg_date ) ! Background time for Jb referenced to ndate0 |
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| 187 | CALL calc_date( nitdin_r , ditdin_date ) ! Background time for DI referenced to ndate0 |
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| 188 | CALL calc_date( nitiaustr_r, ditiaustr_date ) ! IAU start time referenced to ndate0 |
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| 189 | CALL calc_date( nitiaufin_r, ditiaufin_date ) ! IAU end time referenced to ndate0 |
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[6140] | 190 | |
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[2128] | 191 | IF(lwp) THEN |
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| 192 | WRITE(numout,*) |
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| 193 | WRITE(numout,*) ' Time steps referenced to current cycle:' |
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| 194 | WRITE(numout,*) ' iitrst = ', nit000 - 1 |
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| 195 | WRITE(numout,*) ' nit000 = ', nit000 |
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| 196 | WRITE(numout,*) ' nitend = ', nitend |
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| 197 | WRITE(numout,*) ' nitbkg_r = ', nitbkg_r |
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| 198 | WRITE(numout,*) ' nitdin_r = ', nitdin_r |
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| 199 | WRITE(numout,*) ' nitiaustr_r = ', nitiaustr_r |
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| 200 | WRITE(numout,*) ' nitiaufin_r = ', nitiaufin_r |
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| 201 | WRITE(numout,*) |
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| 202 | WRITE(numout,*) ' Dates referenced to current cycle:' |
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| 203 | WRITE(numout,*) ' ndastp = ', ndastp |
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| 204 | WRITE(numout,*) ' ndate0 = ', ndate0 |
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[6140] | 205 | WRITE(numout,*) ' nn_time0 = ', nn_time0 |
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| 206 | WRITE(numout,*) ' ditend_date = ', ditend_date |
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| 207 | WRITE(numout,*) ' ditbkg_date = ', ditbkg_date |
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| 208 | WRITE(numout,*) ' ditdin_date = ', ditdin_date |
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| 209 | WRITE(numout,*) ' ditiaustr_date = ', ditiaustr_date |
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| 210 | WRITE(numout,*) ' ditiaufin_date = ', ditiaufin_date |
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[2128] | 211 | ENDIF |
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| 212 | |
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| 213 | |
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| 214 | IF ( ( ln_asmdin ).AND.( ln_asmiau ) ) & |
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| 215 | & CALL ctl_stop( ' ln_asmdin and ln_asmiau :', & |
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| 216 | & ' Choose Direct Initialization OR Incremental Analysis Updating') |
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| 217 | |
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| 218 | IF ( ( ( .NOT. ln_asmdin ).AND.( .NOT. ln_asmiau ) ) & |
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[3764] | 219 | .AND.( ( ln_trainc ).OR.( ln_dyninc ).OR.( ln_sshinc ) .OR. ( ln_seaiceinc) )) & |
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| 220 | & CALL ctl_stop( ' One or more of ln_trainc, ln_dyninc, ln_sshinc and ln_seaiceinc is set to .true.', & |
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[2128] | 221 | & ' but ln_asmdin and ln_asmiau are both set to .false. :', & |
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| 222 | & ' Inconsistent options') |
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| 223 | |
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| 224 | IF ( ( niaufn /= 0 ).AND.( niaufn /= 1 ) ) & |
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| 225 | & CALL ctl_stop( ' niaufn /= 0 or niaufn /=1 :', & |
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| 226 | & ' Type IAU weighting function is invalid') |
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| 227 | |
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[3764] | 228 | IF ( ( .NOT. ln_trainc ).AND.( .NOT. ln_dyninc ).AND.( .NOT. ln_sshinc ).AND.( .NOT. ln_seaiceinc ) & |
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[2128] | 229 | & ) & |
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[3764] | 230 | & CALL ctl_warn( ' ln_trainc, ln_dyninc, ln_sshinc and ln_seaiceinc are set to .false. :', & |
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[2128] | 231 | & ' The assimilation increments are not applied') |
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| 232 | |
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| 233 | IF ( ( ln_asmiau ).AND.( nitiaustr == nitiaufin ) ) & |
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| 234 | & CALL ctl_stop( ' nitiaustr = nitiaufin :', & |
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| 235 | & ' IAU interval is of zero length') |
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| 236 | |
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| 237 | IF ( ( ln_asmiau ).AND.( ( nitiaustr_r < nit000 ).OR.( nitiaufin_r > nitend ) ) ) & |
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| 238 | & CALL ctl_stop( ' nitiaustr or nitiaufin :', & |
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| 239 | & ' IAU starting or final time step is outside the cycle interval', & |
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| 240 | & ' Valid range nit000 to nitend') |
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| 241 | |
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| 242 | IF ( ( nitbkg_r < nit000 - 1 ).OR.( nitbkg_r > nitend ) ) & |
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| 243 | & CALL ctl_stop( ' nitbkg :', & |
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| 244 | & ' Background time step is outside the cycle interval') |
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| 245 | |
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| 246 | IF ( ( nitdin_r < nit000 - 1 ).OR.( nitdin_r > nitend ) ) & |
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| 247 | & CALL ctl_stop( ' nitdin :', & |
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| 248 | & ' Background time step for Direct Initialization is outside', & |
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| 249 | & ' the cycle interval') |
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| 250 | |
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| 251 | IF ( nstop > 0 ) RETURN ! if there are any errors then go no further |
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| 252 | |
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| 253 | !-------------------------------------------------------------------- |
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| 254 | ! Initialize the Incremental Analysis Updating weighting function |
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| 255 | !-------------------------------------------------------------------- |
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| 256 | |
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[9213] | 257 | IF( ln_asmiau ) THEN |
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| 258 | ! |
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[2128] | 259 | ALLOCATE( wgtiau( icycper ) ) |
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[9213] | 260 | ! |
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[9019] | 261 | wgtiau(:) = 0._wp |
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[9213] | 262 | ! |
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| 263 | ! !--------------------------------------------------------- |
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| 264 | IF( niaufn == 0 ) THEN ! Constant IAU forcing |
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| 265 | ! !--------------------------------------------------------- |
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[2128] | 266 | DO jt = 1, iiauper |
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| 267 | wgtiau(jt+nitiaustr-1) = 1.0 / REAL( iiauper ) |
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| 268 | END DO |
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[9213] | 269 | ! !--------------------------------------------------------- |
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| 270 | ELSEIF ( niaufn == 1 ) THEN ! Linear hat-like, centred in middle of IAU interval |
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| 271 | ! !--------------------------------------------------------- |
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[2128] | 272 | ! Compute the normalization factor |
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[9213] | 273 | znorm = 0._wp |
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| 274 | IF( MOD( iiauper, 2 ) == 0 ) THEN ! Even number of time steps in IAU interval |
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[2128] | 275 | imid = iiauper / 2 |
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| 276 | DO jt = 1, imid |
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| 277 | znorm = znorm + REAL( jt ) |
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| 278 | END DO |
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| 279 | znorm = 2.0 * znorm |
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[9213] | 280 | ELSE ! Odd number of time steps in IAU interval |
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[2128] | 281 | imid = ( iiauper + 1 ) / 2 |
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| 282 | DO jt = 1, imid - 1 |
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| 283 | znorm = znorm + REAL( jt ) |
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| 284 | END DO |
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| 285 | znorm = 2.0 * znorm + REAL( imid ) |
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| 286 | ENDIF |
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| 287 | znorm = 1.0 / znorm |
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[9213] | 288 | ! |
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[2128] | 289 | DO jt = 1, imid - 1 |
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| 290 | wgtiau(jt+nitiaustr-1) = REAL( jt ) * znorm |
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| 291 | END DO |
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| 292 | DO jt = imid, iiauper |
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| 293 | wgtiau(jt+nitiaustr-1) = REAL( iiauper - jt + 1 ) * znorm |
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| 294 | END DO |
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[9213] | 295 | ! |
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[2128] | 296 | ENDIF |
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| 297 | |
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| 298 | ! Test that the integral of the weights over the weighting interval equals 1 |
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| 299 | IF(lwp) THEN |
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| 300 | WRITE(numout,*) |
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| 301 | WRITE(numout,*) 'asm_inc_init : IAU weights' |
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| 302 | WRITE(numout,*) '~~~~~~~~~~~~' |
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| 303 | WRITE(numout,*) ' time step IAU weight' |
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| 304 | WRITE(numout,*) ' ========= =====================' |
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| 305 | ztotwgt = 0.0 |
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| 306 | DO jt = 1, icycper |
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| 307 | ztotwgt = ztotwgt + wgtiau(jt) |
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| 308 | WRITE(numout,*) ' ', jt, ' ', wgtiau(jt) |
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| 309 | END DO |
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| 310 | WRITE(numout,*) ' ===================================' |
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| 311 | WRITE(numout,*) ' Time-integrated weight = ', ztotwgt |
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| 312 | WRITE(numout,*) ' ===================================' |
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| 313 | ENDIF |
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| 314 | |
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| 315 | ENDIF |
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| 316 | |
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| 317 | !-------------------------------------------------------------------- |
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| 318 | ! Allocate and initialize the increment arrays |
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| 319 | !-------------------------------------------------------------------- |
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| 320 | |
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[9213] | 321 | ALLOCATE( t_bkginc (jpi,jpj,jpk) ) ; t_bkginc (:,:,:) = 0._wp |
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| 322 | ALLOCATE( s_bkginc (jpi,jpj,jpk) ) ; s_bkginc (:,:,:) = 0._wp |
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| 323 | ALLOCATE( u_bkginc (jpi,jpj,jpk) ) ; u_bkginc (:,:,:) = 0._wp |
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| 324 | ALLOCATE( v_bkginc (jpi,jpj,jpk) ) ; v_bkginc (:,:,:) = 0._wp |
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| 325 | ALLOCATE( ssh_bkginc (jpi,jpj) ) ; ssh_bkginc (:,:) = 0._wp |
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| 326 | ALLOCATE( seaice_bkginc(jpi,jpj) ) ; seaice_bkginc(:,:) = 0._wp |
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[2128] | 327 | #if defined key_asminc |
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[9213] | 328 | ALLOCATE( ssh_iau (jpi,jpj) ) ; ssh_iau (:,:) = 0._wp |
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[2128] | 329 | #endif |
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[8030] | 330 | #if defined key_cice && defined key_asminc |
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[9213] | 331 | ALLOCATE( ndaice_da (jpi,jpj) ) ; ndaice_da (:,:) = 0._wp |
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[8030] | 332 | #endif |
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[9213] | 333 | ! |
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| 334 | IF ( ln_trainc .OR. ln_dyninc .OR. & !-------------------------------------- |
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| 335 | & ln_sshinc .OR. ln_seaiceinc ) THEN ! Read the increments from file |
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| 336 | ! !-------------------------------------- |
---|
[2128] | 337 | CALL iom_open( c_asminc, inum ) |
---|
[9213] | 338 | ! |
---|
| 339 | CALL iom_get( inum, 'time' , zdate_inc ) |
---|
[2128] | 340 | CALL iom_get( inum, 'z_inc_dateb', z_inc_dateb ) |
---|
| 341 | CALL iom_get( inum, 'z_inc_datef', z_inc_datef ) |
---|
| 342 | z_inc_dateb = zdate_inc |
---|
| 343 | z_inc_datef = zdate_inc |
---|
[9213] | 344 | ! |
---|
[2128] | 345 | IF(lwp) THEN |
---|
| 346 | WRITE(numout,*) |
---|
[9213] | 347 | WRITE(numout,*) 'asm_inc_init : Assimilation increments valid between dates ', z_inc_dateb,' and ', z_inc_datef |
---|
[2128] | 348 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
| 349 | ENDIF |
---|
[9213] | 350 | ! |
---|
| 351 | IF ( ( z_inc_dateb < ndastp + nn_time0*0.0001_wp ) .OR. & |
---|
| 352 | & ( z_inc_datef > ditend_date ) ) & |
---|
| 353 | & CALL ctl_warn( ' Validity time of assimilation increments is ', & |
---|
| 354 | & ' outside the assimilation interval' ) |
---|
[2128] | 355 | |
---|
[6140] | 356 | IF ( ( ln_asmdin ).AND.( zdate_inc /= ditdin_date ) ) & |
---|
[2128] | 357 | & CALL ctl_warn( ' Validity time of assimilation increments does ', & |
---|
| 358 | & ' not agree with Direct Initialization time' ) |
---|
| 359 | |
---|
| 360 | IF ( ln_trainc ) THEN |
---|
| 361 | CALL iom_get( inum, jpdom_autoglo, 'bckint', t_bkginc, 1 ) |
---|
| 362 | CALL iom_get( inum, jpdom_autoglo, 'bckins', s_bkginc, 1 ) |
---|
| 363 | ! Apply the masks |
---|
| 364 | t_bkginc(:,:,:) = t_bkginc(:,:,:) * tmask(:,:,:) |
---|
| 365 | s_bkginc(:,:,:) = s_bkginc(:,:,:) * tmask(:,:,:) |
---|
| 366 | ! Set missing increments to 0.0 rather than 1e+20 |
---|
| 367 | ! to allow for differences in masks |
---|
| 368 | WHERE( ABS( t_bkginc(:,:,:) ) > 1.0e+10 ) t_bkginc(:,:,:) = 0.0 |
---|
| 369 | WHERE( ABS( s_bkginc(:,:,:) ) > 1.0e+10 ) s_bkginc(:,:,:) = 0.0 |
---|
| 370 | ENDIF |
---|
| 371 | |
---|
| 372 | IF ( ln_dyninc ) THEN |
---|
| 373 | CALL iom_get( inum, jpdom_autoglo, 'bckinu', u_bkginc, 1 ) |
---|
| 374 | CALL iom_get( inum, jpdom_autoglo, 'bckinv', v_bkginc, 1 ) |
---|
| 375 | ! Apply the masks |
---|
| 376 | u_bkginc(:,:,:) = u_bkginc(:,:,:) * umask(:,:,:) |
---|
| 377 | v_bkginc(:,:,:) = v_bkginc(:,:,:) * vmask(:,:,:) |
---|
| 378 | ! Set missing increments to 0.0 rather than 1e+20 |
---|
| 379 | ! to allow for differences in masks |
---|
| 380 | WHERE( ABS( u_bkginc(:,:,:) ) > 1.0e+10 ) u_bkginc(:,:,:) = 0.0 |
---|
| 381 | WHERE( ABS( v_bkginc(:,:,:) ) > 1.0e+10 ) v_bkginc(:,:,:) = 0.0 |
---|
| 382 | ENDIF |
---|
| 383 | |
---|
| 384 | IF ( ln_sshinc ) THEN |
---|
| 385 | CALL iom_get( inum, jpdom_autoglo, 'bckineta', ssh_bkginc, 1 ) |
---|
| 386 | ! Apply the masks |
---|
| 387 | ssh_bkginc(:,:) = ssh_bkginc(:,:) * tmask(:,:,1) |
---|
| 388 | ! Set missing increments to 0.0 rather than 1e+20 |
---|
| 389 | ! to allow for differences in masks |
---|
| 390 | WHERE( ABS( ssh_bkginc(:,:) ) > 1.0e+10 ) ssh_bkginc(:,:) = 0.0 |
---|
| 391 | ENDIF |
---|
| 392 | |
---|
[3764] | 393 | IF ( ln_seaiceinc ) THEN |
---|
| 394 | CALL iom_get( inum, jpdom_autoglo, 'bckinseaice', seaice_bkginc, 1 ) |
---|
| 395 | ! Apply the masks |
---|
| 396 | seaice_bkginc(:,:) = seaice_bkginc(:,:) * tmask(:,:,1) |
---|
| 397 | ! Set missing increments to 0.0 rather than 1e+20 |
---|
| 398 | ! to allow for differences in masks |
---|
| 399 | WHERE( ABS( seaice_bkginc(:,:) ) > 1.0e+10 ) seaice_bkginc(:,:) = 0.0 |
---|
| 400 | ENDIF |
---|
[9213] | 401 | ! |
---|
[2128] | 402 | CALL iom_close( inum ) |
---|
[9213] | 403 | ! |
---|
[2128] | 404 | ENDIF |
---|
[9213] | 405 | ! |
---|
| 406 | ! !-------------------------------------- |
---|
| 407 | IF ( ln_dyninc .AND. nn_divdmp > 0 ) THEN ! Apply divergence damping filter |
---|
| 408 | ! !-------------------------------------- |
---|
[9019] | 409 | ALLOCATE( zhdiv(jpi,jpj) ) |
---|
[5836] | 410 | ! |
---|
| 411 | DO jt = 1, nn_divdmp |
---|
| 412 | ! |
---|
[9019] | 413 | DO jk = 1, jpkm1 ! zhdiv = e1e1 * div |
---|
| 414 | zhdiv(:,:) = 0._wp |
---|
[3764] | 415 | DO jj = 2, jpjm1 |
---|
| 416 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
[9019] | 417 | zhdiv(ji,jj) = ( e2u(ji ,jj) * e3u_n(ji ,jj,jk) * u_bkginc(ji ,jj,jk) & |
---|
| 418 | & - e2u(ji-1,jj) * e3u_n(ji-1,jj,jk) * u_bkginc(ji-1,jj,jk) & |
---|
| 419 | & + e1v(ji,jj ) * e3v_n(ji,jj ,jk) * v_bkginc(ji,jj ,jk) & |
---|
| 420 | & - e1v(ji,jj-1) * e3v_n(ji,jj-1,jk) * v_bkginc(ji,jj-1,jk) ) / e3t_n(ji,jj,jk) |
---|
[3764] | 421 | END DO |
---|
[3294] | 422 | END DO |
---|
[10425] | 423 | CALL lbc_lnk( 'asminc', zhdiv, 'T', 1. ) ! lateral boundary cond. (no sign change) |
---|
[5836] | 424 | ! |
---|
[3764] | 425 | DO jj = 2, jpjm1 |
---|
| 426 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
[6140] | 427 | u_bkginc(ji,jj,jk) = u_bkginc(ji,jj,jk) & |
---|
[9019] | 428 | & + 0.2_wp * ( zhdiv(ji+1,jj) - zhdiv(ji ,jj) ) * r1_e1u(ji,jj) * umask(ji,jj,jk) |
---|
[6140] | 429 | v_bkginc(ji,jj,jk) = v_bkginc(ji,jj,jk) & |
---|
[9019] | 430 | & + 0.2_wp * ( zhdiv(ji,jj+1) - zhdiv(ji,jj ) ) * r1_e2v(ji,jj) * vmask(ji,jj,jk) |
---|
[3764] | 431 | END DO |
---|
[3294] | 432 | END DO |
---|
| 433 | END DO |
---|
[5836] | 434 | ! |
---|
[3764] | 435 | END DO |
---|
[5836] | 436 | ! |
---|
[9019] | 437 | DEALLOCATE( zhdiv ) |
---|
[5836] | 438 | ! |
---|
[3294] | 439 | ENDIF |
---|
[9213] | 440 | ! |
---|
| 441 | ! !----------------------------------------------------- |
---|
| 442 | IF ( ln_asmdin ) THEN ! Allocate and initialize the background state arrays |
---|
| 443 | ! !----------------------------------------------------- |
---|
[5836] | 444 | ! |
---|
[9213] | 445 | ALLOCATE( t_bkg (jpi,jpj,jpk) ) ; t_bkg (:,:,:) = 0._wp |
---|
| 446 | ALLOCATE( s_bkg (jpi,jpj,jpk) ) ; s_bkg (:,:,:) = 0._wp |
---|
| 447 | ALLOCATE( u_bkg (jpi,jpj,jpk) ) ; u_bkg (:,:,:) = 0._wp |
---|
| 448 | ALLOCATE( v_bkg (jpi,jpj,jpk) ) ; v_bkg (:,:,:) = 0._wp |
---|
| 449 | ALLOCATE( ssh_bkg(jpi,jpj) ) ; ssh_bkg(:,:) = 0._wp |
---|
[5836] | 450 | ! |
---|
| 451 | ! |
---|
[2128] | 452 | !-------------------------------------------------------------------- |
---|
| 453 | ! Read from file the background state at analysis time |
---|
| 454 | !-------------------------------------------------------------------- |
---|
[5836] | 455 | ! |
---|
[2128] | 456 | CALL iom_open( c_asmdin, inum ) |
---|
[5836] | 457 | ! |
---|
[3764] | 458 | CALL iom_get( inum, 'rdastp', zdate_bkg ) |
---|
[5836] | 459 | ! |
---|
[2128] | 460 | IF(lwp) THEN |
---|
| 461 | WRITE(numout,*) |
---|
[9213] | 462 | WRITE(numout,*) ' ==>>> Assimilation background state valid at : ', zdate_bkg |
---|
| 463 | WRITE(numout,*) |
---|
[2128] | 464 | ENDIF |
---|
[5836] | 465 | ! |
---|
[9213] | 466 | IF ( zdate_bkg /= ditdin_date ) & |
---|
[2128] | 467 | & CALL ctl_warn( ' Validity time of assimilation background state does', & |
---|
| 468 | & ' not agree with Direct Initialization time' ) |
---|
[5836] | 469 | ! |
---|
[2128] | 470 | IF ( ln_trainc ) THEN |
---|
| 471 | CALL iom_get( inum, jpdom_autoglo, 'tn', t_bkg ) |
---|
| 472 | CALL iom_get( inum, jpdom_autoglo, 'sn', s_bkg ) |
---|
| 473 | t_bkg(:,:,:) = t_bkg(:,:,:) * tmask(:,:,:) |
---|
| 474 | s_bkg(:,:,:) = s_bkg(:,:,:) * tmask(:,:,:) |
---|
| 475 | ENDIF |
---|
[5836] | 476 | ! |
---|
[2128] | 477 | IF ( ln_dyninc ) THEN |
---|
| 478 | CALL iom_get( inum, jpdom_autoglo, 'un', u_bkg ) |
---|
| 479 | CALL iom_get( inum, jpdom_autoglo, 'vn', v_bkg ) |
---|
| 480 | u_bkg(:,:,:) = u_bkg(:,:,:) * umask(:,:,:) |
---|
| 481 | v_bkg(:,:,:) = v_bkg(:,:,:) * vmask(:,:,:) |
---|
| 482 | ENDIF |
---|
[5836] | 483 | ! |
---|
[2128] | 484 | IF ( ln_sshinc ) THEN |
---|
| 485 | CALL iom_get( inum, jpdom_autoglo, 'sshn', ssh_bkg ) |
---|
| 486 | ssh_bkg(:,:) = ssh_bkg(:,:) * tmask(:,:,1) |
---|
| 487 | ENDIF |
---|
[5836] | 488 | ! |
---|
[2128] | 489 | CALL iom_close( inum ) |
---|
[5836] | 490 | ! |
---|
[2128] | 491 | ENDIF |
---|
[2392] | 492 | ! |
---|
[9213] | 493 | IF(lwp) WRITE(numout,*) ' ==>>> Euler time step switch is ', neuler |
---|
| 494 | ! |
---|
| 495 | IF( lk_asminc ) THEN !== data assimilation ==! |
---|
| 496 | IF( ln_bkgwri ) CALL asm_bkg_wri( nit000 - 1 ) ! Output background fields |
---|
| 497 | IF( ln_asmdin ) THEN ! Direct initialization |
---|
| 498 | IF( ln_trainc ) CALL tra_asm_inc( nit000 - 1 ) ! Tracers |
---|
| 499 | IF( ln_dyninc ) CALL dyn_asm_inc( nit000 - 1 ) ! Dynamics |
---|
| 500 | IF( ln_sshinc ) CALL ssh_asm_inc( nit000 - 1 ) ! SSH |
---|
| 501 | ENDIF |
---|
| 502 | ENDIF |
---|
| 503 | ! |
---|
[2128] | 504 | END SUBROUTINE asm_inc_init |
---|
[9213] | 505 | |
---|
| 506 | |
---|
[2128] | 507 | SUBROUTINE tra_asm_inc( kt ) |
---|
| 508 | !!---------------------------------------------------------------------- |
---|
| 509 | !! *** ROUTINE tra_asm_inc *** |
---|
| 510 | !! |
---|
| 511 | !! ** Purpose : Apply the tracer (T and S) assimilation increments |
---|
| 512 | !! |
---|
| 513 | !! ** Method : Direct initialization or Incremental Analysis Updating |
---|
| 514 | !! |
---|
| 515 | !! ** Action : |
---|
| 516 | !!---------------------------------------------------------------------- |
---|
[5836] | 517 | INTEGER, INTENT(IN) :: kt ! Current time step |
---|
[2392] | 518 | ! |
---|
[5836] | 519 | INTEGER :: ji, jj, jk |
---|
| 520 | INTEGER :: it |
---|
[2128] | 521 | REAL(wp) :: zincwgt ! IAU weight for current time step |
---|
[3764] | 522 | REAL (wp), DIMENSION(jpi,jpj,jpk) :: fzptnz ! 3d freezing point values |
---|
[2392] | 523 | !!---------------------------------------------------------------------- |
---|
[5836] | 524 | ! |
---|
[3764] | 525 | ! freezing point calculation taken from oc_fz_pt (but calculated for all depths) |
---|
| 526 | ! used to prevent the applied increments taking the temperature below the local freezing point |
---|
[4990] | 527 | DO jk = 1, jpkm1 |
---|
[6140] | 528 | CALL eos_fzp( tsn(:,:,jk,jp_sal), fzptnz(:,:,jk), gdept_n(:,:,jk) ) |
---|
[4990] | 529 | END DO |
---|
[5836] | 530 | ! |
---|
| 531 | ! !-------------------------------------- |
---|
| 532 | IF ( ln_asmiau ) THEN ! Incremental Analysis Updating |
---|
| 533 | ! !-------------------------------------- |
---|
| 534 | ! |
---|
[2128] | 535 | IF ( ( kt >= nitiaustr_r ).AND.( kt <= nitiaufin_r ) ) THEN |
---|
[5836] | 536 | ! |
---|
[2128] | 537 | it = kt - nit000 + 1 |
---|
| 538 | zincwgt = wgtiau(it) / rdt ! IAU weight for the current time step |
---|
[5836] | 539 | ! |
---|
[2128] | 540 | IF(lwp) THEN |
---|
| 541 | WRITE(numout,*) |
---|
[4990] | 542 | WRITE(numout,*) 'tra_asm_inc : Tracer IAU at time step = ', kt,' with IAU weight = ', wgtiau(it) |
---|
[2128] | 543 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
| 544 | ENDIF |
---|
[5836] | 545 | ! |
---|
[2128] | 546 | ! Update the tracer tendencies |
---|
| 547 | DO jk = 1, jpkm1 |
---|
[3764] | 548 | IF (ln_temnofreeze) THEN |
---|
| 549 | ! Do not apply negative increments if the temperature will fall below freezing |
---|
| 550 | WHERE(t_bkginc(:,:,jk) > 0.0_wp .OR. & |
---|
| 551 | & tsn(:,:,jk,jp_tem) + tsa(:,:,jk,jp_tem) + t_bkginc(:,:,jk) * wgtiau(it) > fzptnz(:,:,jk) ) |
---|
| 552 | tsa(:,:,jk,jp_tem) = tsa(:,:,jk,jp_tem) + t_bkginc(:,:,jk) * zincwgt |
---|
| 553 | END WHERE |
---|
| 554 | ELSE |
---|
| 555 | tsa(:,:,jk,jp_tem) = tsa(:,:,jk,jp_tem) + t_bkginc(:,:,jk) * zincwgt |
---|
| 556 | ENDIF |
---|
| 557 | IF (ln_salfix) THEN |
---|
| 558 | ! Do not apply negative increments if the salinity will fall below a specified |
---|
| 559 | ! minimum value salfixmin |
---|
| 560 | WHERE(s_bkginc(:,:,jk) > 0.0_wp .OR. & |
---|
| 561 | & tsn(:,:,jk,jp_sal) + tsa(:,:,jk,jp_sal) + s_bkginc(:,:,jk) * wgtiau(it) > salfixmin ) |
---|
| 562 | tsa(:,:,jk,jp_sal) = tsa(:,:,jk,jp_sal) + s_bkginc(:,:,jk) * zincwgt |
---|
| 563 | END WHERE |
---|
| 564 | ELSE |
---|
| 565 | tsa(:,:,jk,jp_sal) = tsa(:,:,jk,jp_sal) + s_bkginc(:,:,jk) * zincwgt |
---|
| 566 | ENDIF |
---|
[2128] | 567 | END DO |
---|
[5836] | 568 | ! |
---|
[2128] | 569 | ENDIF |
---|
[5836] | 570 | ! |
---|
[2128] | 571 | IF ( kt == nitiaufin_r + 1 ) THEN ! For bias crcn to work |
---|
| 572 | DEALLOCATE( t_bkginc ) |
---|
| 573 | DEALLOCATE( s_bkginc ) |
---|
| 574 | ENDIF |
---|
[5836] | 575 | ! !-------------------------------------- |
---|
| 576 | ELSEIF ( ln_asmdin ) THEN ! Direct Initialization |
---|
| 577 | ! !-------------------------------------- |
---|
| 578 | ! |
---|
[2128] | 579 | IF ( kt == nitdin_r ) THEN |
---|
[5836] | 580 | ! |
---|
[2128] | 581 | neuler = 0 ! Force Euler forward step |
---|
[5836] | 582 | ! |
---|
[2128] | 583 | ! Initialize the now fields with the background + increment |
---|
[3764] | 584 | IF (ln_temnofreeze) THEN |
---|
| 585 | ! Do not apply negative increments if the temperature will fall below freezing |
---|
[4990] | 586 | WHERE( t_bkginc(:,:,:) > 0.0_wp .OR. tsn(:,:,:,jp_tem) + t_bkginc(:,:,:) > fzptnz(:,:,:) ) |
---|
[3764] | 587 | tsn(:,:,:,jp_tem) = t_bkg(:,:,:) + t_bkginc(:,:,:) |
---|
| 588 | END WHERE |
---|
| 589 | ELSE |
---|
| 590 | tsn(:,:,:,jp_tem) = t_bkg(:,:,:) + t_bkginc(:,:,:) |
---|
| 591 | ENDIF |
---|
[2128] | 592 | IF (ln_salfix) THEN |
---|
[3764] | 593 | ! Do not apply negative increments if the salinity will fall below a specified |
---|
| 594 | ! minimum value salfixmin |
---|
[4990] | 595 | WHERE( s_bkginc(:,:,:) > 0.0_wp .OR. tsn(:,:,:,jp_sal) + s_bkginc(:,:,:) > salfixmin ) |
---|
[3764] | 596 | tsn(:,:,:,jp_sal) = s_bkg(:,:,:) + s_bkginc(:,:,:) |
---|
| 597 | END WHERE |
---|
| 598 | ELSE |
---|
| 599 | tsn(:,:,:,jp_sal) = s_bkg(:,:,:) + s_bkginc(:,:,:) |
---|
[2128] | 600 | ENDIF |
---|
| 601 | |
---|
[4990] | 602 | tsb(:,:,:,:) = tsn(:,:,:,:) ! Update before fields |
---|
[2128] | 603 | |
---|
[4990] | 604 | CALL eos( tsb, rhd, rhop, gdept_0(:,:,:) ) ! Before potential and in situ densities |
---|
| 605 | !!gm fabien |
---|
| 606 | ! CALL eos( tsb, rhd, rhop ) ! Before potential and in situ densities |
---|
| 607 | !!gm |
---|
| 608 | |
---|
[6140] | 609 | IF( ln_zps .AND. .NOT. lk_c1d .AND. .NOT. ln_isfcav) & |
---|
| 610 | & CALL zps_hde ( kt, jpts, tsb, gtsu, gtsv, & ! Partial steps: before horizontal gradient |
---|
| 611 | & rhd, gru , grv ) ! of t, s, rd at the last ocean level |
---|
| 612 | IF( ln_zps .AND. .NOT. lk_c1d .AND. ln_isfcav) & |
---|
| 613 | & CALL zps_hde_isf( nit000, jpts, tsb, gtsu, gtsv, gtui, gtvi, & ! Partial steps for top cell (ISF) |
---|
| 614 | & rhd, gru , grv , grui, grvi ) ! of t, s, rd at the last ocean level |
---|
| 615 | |
---|
[2128] | 616 | DEALLOCATE( t_bkginc ) |
---|
| 617 | DEALLOCATE( s_bkginc ) |
---|
| 618 | DEALLOCATE( t_bkg ) |
---|
| 619 | DEALLOCATE( s_bkg ) |
---|
| 620 | ENDIF |
---|
[2392] | 621 | ! |
---|
[2128] | 622 | ENDIF |
---|
[3764] | 623 | ! Perhaps the following call should be in step |
---|
[5836] | 624 | IF ( ln_seaiceinc ) CALL seaice_asm_inc ( kt ) ! apply sea ice concentration increment |
---|
[2392] | 625 | ! |
---|
[2128] | 626 | END SUBROUTINE tra_asm_inc |
---|
| 627 | |
---|
[2392] | 628 | |
---|
[2128] | 629 | SUBROUTINE dyn_asm_inc( kt ) |
---|
| 630 | !!---------------------------------------------------------------------- |
---|
| 631 | !! *** ROUTINE dyn_asm_inc *** |
---|
| 632 | !! |
---|
| 633 | !! ** Purpose : Apply the dynamics (u and v) assimilation increments. |
---|
| 634 | !! |
---|
| 635 | !! ** Method : Direct initialization or Incremental Analysis Updating. |
---|
| 636 | !! |
---|
| 637 | !! ** Action : |
---|
| 638 | !!---------------------------------------------------------------------- |
---|
| 639 | INTEGER, INTENT(IN) :: kt ! Current time step |
---|
[2392] | 640 | ! |
---|
[2128] | 641 | INTEGER :: jk |
---|
| 642 | INTEGER :: it |
---|
| 643 | REAL(wp) :: zincwgt ! IAU weight for current time step |
---|
[2392] | 644 | !!---------------------------------------------------------------------- |
---|
[5836] | 645 | ! |
---|
| 646 | ! !-------------------------------------------- |
---|
| 647 | IF ( ln_asmiau ) THEN ! Incremental Analysis Updating |
---|
| 648 | ! !-------------------------------------------- |
---|
| 649 | ! |
---|
[2128] | 650 | IF ( ( kt >= nitiaustr_r ).AND.( kt <= nitiaufin_r ) ) THEN |
---|
[5836] | 651 | ! |
---|
[2128] | 652 | it = kt - nit000 + 1 |
---|
| 653 | zincwgt = wgtiau(it) / rdt ! IAU weight for the current time step |
---|
[5836] | 654 | ! |
---|
[2128] | 655 | IF(lwp) THEN |
---|
| 656 | WRITE(numout,*) |
---|
[5836] | 657 | WRITE(numout,*) 'dyn_asm_inc : Dynamics IAU at time step = ', kt,' with IAU weight = ', wgtiau(it) |
---|
[2128] | 658 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
| 659 | ENDIF |
---|
[5836] | 660 | ! |
---|
[2128] | 661 | ! Update the dynamic tendencies |
---|
| 662 | DO jk = 1, jpkm1 |
---|
| 663 | ua(:,:,jk) = ua(:,:,jk) + u_bkginc(:,:,jk) * zincwgt |
---|
| 664 | va(:,:,jk) = va(:,:,jk) + v_bkginc(:,:,jk) * zincwgt |
---|
| 665 | END DO |
---|
[5836] | 666 | ! |
---|
[2128] | 667 | IF ( kt == nitiaufin_r ) THEN |
---|
| 668 | DEALLOCATE( u_bkginc ) |
---|
| 669 | DEALLOCATE( v_bkginc ) |
---|
| 670 | ENDIF |
---|
[5836] | 671 | ! |
---|
[2128] | 672 | ENDIF |
---|
[5836] | 673 | ! !----------------------------------------- |
---|
| 674 | ELSEIF ( ln_asmdin ) THEN ! Direct Initialization |
---|
| 675 | ! !----------------------------------------- |
---|
| 676 | ! |
---|
[2128] | 677 | IF ( kt == nitdin_r ) THEN |
---|
[5836] | 678 | ! |
---|
[2128] | 679 | neuler = 0 ! Force Euler forward step |
---|
[5836] | 680 | ! |
---|
[2128] | 681 | ! Initialize the now fields with the background + increment |
---|
| 682 | un(:,:,:) = u_bkg(:,:,:) + u_bkginc(:,:,:) |
---|
| 683 | vn(:,:,:) = v_bkg(:,:,:) + v_bkginc(:,:,:) |
---|
[5836] | 684 | ! |
---|
[2128] | 685 | ub(:,:,:) = un(:,:,:) ! Update before fields |
---|
| 686 | vb(:,:,:) = vn(:,:,:) |
---|
[5836] | 687 | ! |
---|
[2128] | 688 | DEALLOCATE( u_bkg ) |
---|
| 689 | DEALLOCATE( v_bkg ) |
---|
| 690 | DEALLOCATE( u_bkginc ) |
---|
| 691 | DEALLOCATE( v_bkginc ) |
---|
| 692 | ENDIF |
---|
[2392] | 693 | ! |
---|
[2128] | 694 | ENDIF |
---|
[2392] | 695 | ! |
---|
[2128] | 696 | END SUBROUTINE dyn_asm_inc |
---|
| 697 | |
---|
[2392] | 698 | |
---|
[2128] | 699 | SUBROUTINE ssh_asm_inc( kt ) |
---|
| 700 | !!---------------------------------------------------------------------- |
---|
| 701 | !! *** ROUTINE ssh_asm_inc *** |
---|
| 702 | !! |
---|
| 703 | !! ** Purpose : Apply the sea surface height assimilation increment. |
---|
| 704 | !! |
---|
| 705 | !! ** Method : Direct initialization or Incremental Analysis Updating. |
---|
| 706 | !! |
---|
| 707 | !! ** Action : |
---|
| 708 | !!---------------------------------------------------------------------- |
---|
| 709 | INTEGER, INTENT(IN) :: kt ! Current time step |
---|
[2392] | 710 | ! |
---|
[2128] | 711 | INTEGER :: it |
---|
[3764] | 712 | INTEGER :: jk |
---|
[2128] | 713 | REAL(wp) :: zincwgt ! IAU weight for current time step |
---|
[2392] | 714 | !!---------------------------------------------------------------------- |
---|
[5836] | 715 | ! |
---|
| 716 | ! !----------------------------------------- |
---|
| 717 | IF ( ln_asmiau ) THEN ! Incremental Analysis Updating |
---|
| 718 | ! !----------------------------------------- |
---|
| 719 | ! |
---|
[2128] | 720 | IF ( ( kt >= nitiaustr_r ).AND.( kt <= nitiaufin_r ) ) THEN |
---|
[5836] | 721 | ! |
---|
[2128] | 722 | it = kt - nit000 + 1 |
---|
| 723 | zincwgt = wgtiau(it) / rdt ! IAU weight for the current time step |
---|
[5836] | 724 | ! |
---|
[2128] | 725 | IF(lwp) THEN |
---|
| 726 | WRITE(numout,*) |
---|
| 727 | WRITE(numout,*) 'ssh_asm_inc : SSH IAU at time step = ', & |
---|
| 728 | & kt,' with IAU weight = ', wgtiau(it) |
---|
| 729 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
| 730 | ENDIF |
---|
[5836] | 731 | ! |
---|
[2128] | 732 | ! Save the tendency associated with the IAU weighted SSH increment |
---|
| 733 | ! (applied in dynspg.*) |
---|
| 734 | #if defined key_asminc |
---|
| 735 | ssh_iau(:,:) = ssh_bkginc(:,:) * zincwgt |
---|
| 736 | #endif |
---|
[5836] | 737 | ! |
---|
[8547] | 738 | ELSE IF( kt == nitiaufin_r+1 ) THEN |
---|
[8546] | 739 | ! |
---|
[9465] | 740 | ! test on ssh_bkginc needed as ssh_asm_inc is called twice by time step |
---|
| 741 | IF (ALLOCATED(ssh_bkginc)) DEALLOCATE( ssh_bkginc ) |
---|
| 742 | ! |
---|
| 743 | #if defined key_asminc |
---|
[8546] | 744 | ssh_iau(:,:) = 0._wp |
---|
[9465] | 745 | #endif |
---|
[8546] | 746 | ! |
---|
[2128] | 747 | ENDIF |
---|
[5836] | 748 | ! !----------------------------------------- |
---|
| 749 | ELSEIF ( ln_asmdin ) THEN ! Direct Initialization |
---|
| 750 | ! !----------------------------------------- |
---|
| 751 | ! |
---|
[2128] | 752 | IF ( kt == nitdin_r ) THEN |
---|
[5836] | 753 | ! |
---|
| 754 | neuler = 0 ! Force Euler forward step |
---|
| 755 | ! |
---|
| 756 | sshn(:,:) = ssh_bkg(:,:) + ssh_bkginc(:,:) ! Initialize the now fields the background + increment |
---|
| 757 | ! |
---|
| 758 | sshb(:,:) = sshn(:,:) ! Update before fields |
---|
[6140] | 759 | e3t_b(:,:,:) = e3t_n(:,:,:) |
---|
| 760 | !!gm why not e3u_b, e3v_b, gdept_b ???? |
---|
[5836] | 761 | ! |
---|
[2128] | 762 | DEALLOCATE( ssh_bkg ) |
---|
| 763 | DEALLOCATE( ssh_bkginc ) |
---|
[5836] | 764 | ! |
---|
[2128] | 765 | ENDIF |
---|
[2392] | 766 | ! |
---|
[2128] | 767 | ENDIF |
---|
[2392] | 768 | ! |
---|
[2128] | 769 | END SUBROUTINE ssh_asm_inc |
---|
| 770 | |
---|
[9213] | 771 | |
---|
[9023] | 772 | SUBROUTINE ssh_asm_div( kt, phdivn ) |
---|
| 773 | !!---------------------------------------------------------------------- |
---|
| 774 | !! *** ROUTINE ssh_asm_div *** |
---|
| 775 | !! |
---|
| 776 | !! ** Purpose : ssh increment with z* is incorporated via a correction of the local divergence |
---|
| 777 | !! across all the water column |
---|
| 778 | !! |
---|
| 779 | !! ** Method : |
---|
| 780 | !! CAUTION : sshiau is positive (inflow) decreasing the |
---|
| 781 | !! divergence and expressed in m/s |
---|
| 782 | !! |
---|
| 783 | !! ** Action : phdivn decreased by the ssh increment |
---|
| 784 | !!---------------------------------------------------------------------- |
---|
| 785 | INTEGER, INTENT(IN) :: kt ! ocean time-step index |
---|
| 786 | REAL(wp), DIMENSION(:,:,:), INTENT(inout) :: phdivn ! horizontal divergence |
---|
| 787 | !! |
---|
| 788 | INTEGER :: jk ! dummy loop index |
---|
| 789 | REAL(wp), DIMENSION(:,:) , POINTER :: ztim ! local array |
---|
| 790 | !!---------------------------------------------------------------------- |
---|
| 791 | ! |
---|
| 792 | #if defined key_asminc |
---|
| 793 | CALL ssh_asm_inc( kt ) !== (calculate increments) |
---|
| 794 | ! |
---|
| 795 | IF( ln_linssh ) THEN |
---|
| 796 | phdivn(:,:,1) = phdivn(:,:,1) - ssh_iau(:,:) / e3t_n(:,:,1) * tmask(:,:,1) |
---|
| 797 | ELSE |
---|
[9044] | 798 | ALLOCATE( ztim(jpi,jpj) ) |
---|
[9023] | 799 | ztim(:,:) = ssh_iau(:,:) / ( ht_n(:,:) + 1.0 - ssmask(:,:) ) |
---|
| 800 | DO jk = 1, jpkm1 |
---|
| 801 | phdivn(:,:,jk) = phdivn(:,:,jk) - ztim(:,:) * tmask(:,:,jk) |
---|
| 802 | END DO |
---|
| 803 | ! |
---|
[9044] | 804 | DEALLOCATE(ztim) |
---|
[9023] | 805 | ENDIF |
---|
| 806 | #endif |
---|
| 807 | ! |
---|
| 808 | END SUBROUTINE ssh_asm_div |
---|
[3785] | 809 | |
---|
[9213] | 810 | |
---|
[3764] | 811 | SUBROUTINE seaice_asm_inc( kt, kindic ) |
---|
| 812 | !!---------------------------------------------------------------------- |
---|
| 813 | !! *** ROUTINE seaice_asm_inc *** |
---|
| 814 | !! |
---|
| 815 | !! ** Purpose : Apply the sea ice assimilation increment. |
---|
| 816 | !! |
---|
| 817 | !! ** Method : Direct initialization or Incremental Analysis Updating. |
---|
| 818 | !! |
---|
| 819 | !! ** Action : |
---|
| 820 | !! |
---|
| 821 | !!---------------------------------------------------------------------- |
---|
[5836] | 822 | INTEGER, INTENT(in) :: kt ! Current time step |
---|
[3785] | 823 | INTEGER, INTENT(in), OPTIONAL :: kindic ! flag for disabling the deallocation |
---|
| 824 | ! |
---|
| 825 | INTEGER :: it |
---|
| 826 | REAL(wp) :: zincwgt ! IAU weight for current time step |
---|
[9570] | 827 | #if defined key_si3 |
---|
[9656] | 828 | REAL(wp), DIMENSION(jpi,jpj) :: zofrld, zohicif, zseaicendg, zhicifinc |
---|
[3785] | 829 | REAL(wp) :: zhicifmin = 0.5_wp ! ice minimum depth in metres |
---|
[3764] | 830 | #endif |
---|
[3785] | 831 | !!---------------------------------------------------------------------- |
---|
[5836] | 832 | ! |
---|
| 833 | ! !----------------------------------------- |
---|
| 834 | IF ( ln_asmiau ) THEN ! Incremental Analysis Updating |
---|
| 835 | ! !----------------------------------------- |
---|
| 836 | ! |
---|
[3764] | 837 | IF ( ( kt >= nitiaustr_r ).AND.( kt <= nitiaufin_r ) ) THEN |
---|
[5836] | 838 | ! |
---|
[3764] | 839 | it = kt - nit000 + 1 |
---|
| 840 | zincwgt = wgtiau(it) ! IAU weight for the current time step |
---|
| 841 | ! note this is not a tendency so should not be divided by rdt (as with the tracer and other increments) |
---|
[5836] | 842 | ! |
---|
[3764] | 843 | IF(lwp) THEN |
---|
| 844 | WRITE(numout,*) |
---|
[5836] | 845 | WRITE(numout,*) 'seaice_asm_inc : sea ice conc IAU at time step = ', kt,' with IAU weight = ', wgtiau(it) |
---|
[3764] | 846 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
| 847 | ENDIF |
---|
[5836] | 848 | ! |
---|
[9656] | 849 | ! Sea-ice : SI3 case |
---|
[5836] | 850 | ! |
---|
[9570] | 851 | #if defined key_si3 |
---|
[9019] | 852 | zofrld (:,:) = 1._wp - at_i(:,:) |
---|
| 853 | zohicif(:,:) = hm_i(:,:) |
---|
[3785] | 854 | ! |
---|
[9019] | 855 | at_i (:,:) = 1. - MIN( MAX( 1.-at_i (:,:) - seaice_bkginc(:,:) * zincwgt, 0.0_wp), 1.0_wp) |
---|
| 856 | at_i_b(:,:) = 1. - MIN( MAX( 1.-at_i_b(:,:) - seaice_bkginc(:,:) * zincwgt, 0.0_wp), 1.0_wp) |
---|
| 857 | fr_i(:,:) = at_i(:,:) ! adjust ice fraction |
---|
[3785] | 858 | ! |
---|
[9019] | 859 | zseaicendg(:,:) = zofrld(:,:) - (1. - at_i(:,:)) ! find out actual sea ice nudge applied |
---|
[3785] | 860 | ! |
---|
[3764] | 861 | ! Nudge sea ice depth to bring it up to a required minimum depth |
---|
[9019] | 862 | WHERE( zseaicendg(:,:) > 0.0_wp .AND. hm_i(:,:) < zhicifmin ) |
---|
| 863 | zhicifinc(:,:) = (zhicifmin - hm_i(:,:)) * zincwgt |
---|
[3764] | 864 | ELSEWHERE |
---|
| 865 | zhicifinc(:,:) = 0.0_wp |
---|
| 866 | END WHERE |
---|
[3785] | 867 | ! |
---|
| 868 | ! nudge ice depth |
---|
[9019] | 869 | hm_i (:,:) = hm_i (:,:) + zhicifinc(:,:) |
---|
[3785] | 870 | ! |
---|
| 871 | ! seaice salinity balancing (to add) |
---|
[3764] | 872 | #endif |
---|
[9213] | 873 | ! |
---|
[4245] | 874 | #if defined key_cice && defined key_asminc |
---|
[3785] | 875 | ! Sea-ice : CICE case. Pass ice increment tendency into CICE |
---|
[3764] | 876 | ndaice_da(:,:) = seaice_bkginc(:,:) * zincwgt / rdt |
---|
| 877 | #endif |
---|
[9213] | 878 | ! |
---|
[3764] | 879 | IF ( kt == nitiaufin_r ) THEN |
---|
| 880 | DEALLOCATE( seaice_bkginc ) |
---|
| 881 | ENDIF |
---|
[9213] | 882 | ! |
---|
[3764] | 883 | ELSE |
---|
[9213] | 884 | ! |
---|
[4245] | 885 | #if defined key_cice && defined key_asminc |
---|
[5836] | 886 | ndaice_da(:,:) = 0._wp ! Sea-ice : CICE case. Zero ice increment tendency into CICE |
---|
[3764] | 887 | #endif |
---|
[9213] | 888 | ! |
---|
[3764] | 889 | ENDIF |
---|
[5836] | 890 | ! !----------------------------------------- |
---|
| 891 | ELSEIF ( ln_asmdin ) THEN ! Direct Initialization |
---|
| 892 | ! !----------------------------------------- |
---|
| 893 | ! |
---|
[3764] | 894 | IF ( kt == nitdin_r ) THEN |
---|
[5836] | 895 | ! |
---|
[3764] | 896 | neuler = 0 ! Force Euler forward step |
---|
[5836] | 897 | ! |
---|
[9656] | 898 | ! Sea-ice : SI3 case |
---|
[5836] | 899 | ! |
---|
[9570] | 900 | #if defined key_si3 |
---|
[9019] | 901 | zofrld (:,:) = 1._wp - at_i(:,:) |
---|
| 902 | zohicif(:,:) = hm_i(:,:) |
---|
[3785] | 903 | ! |
---|
[3764] | 904 | ! Initialize the now fields the background + increment |
---|
[9019] | 905 | at_i(:,:) = 1. - MIN( MAX( 1.-at_i(:,:) - seaice_bkginc(:,:), 0.0_wp), 1.0_wp) |
---|
| 906 | at_i_b(:,:) = at_i(:,:) |
---|
| 907 | fr_i(:,:) = at_i(:,:) ! adjust ice fraction |
---|
[3785] | 908 | ! |
---|
[9019] | 909 | zseaicendg(:,:) = zofrld(:,:) - (1. - at_i(:,:)) ! find out actual sea ice nudge applied |
---|
| 910 | ! |
---|
[3764] | 911 | ! Nudge sea ice depth to bring it up to a required minimum depth |
---|
[9019] | 912 | WHERE( zseaicendg(:,:) > 0.0_wp .AND. hm_i(:,:) < zhicifmin ) |
---|
[10355] | 913 | zhicifinc(:,:) = zhicifmin - hm_i(:,:) |
---|
[3764] | 914 | ELSEWHERE |
---|
[9019] | 915 | zhicifinc(:,:) = 0.0_wp |
---|
[3764] | 916 | END WHERE |
---|
[3785] | 917 | ! |
---|
| 918 | ! nudge ice depth |
---|
[9019] | 919 | hm_i (:,:) = hm_i (:,:) + zhicifinc(:,:) |
---|
[3785] | 920 | ! |
---|
| 921 | ! seaice salinity balancing (to add) |
---|
[3764] | 922 | #endif |
---|
[5836] | 923 | ! |
---|
[4245] | 924 | #if defined key_cice && defined key_asminc |
---|
| 925 | ! Sea-ice : CICE case. Pass ice increment tendency into CICE |
---|
[3764] | 926 | ndaice_da(:,:) = seaice_bkginc(:,:) / rdt |
---|
| 927 | #endif |
---|
[5836] | 928 | IF ( .NOT. PRESENT(kindic) ) THEN |
---|
| 929 | DEALLOCATE( seaice_bkginc ) |
---|
| 930 | END IF |
---|
| 931 | ! |
---|
[3764] | 932 | ELSE |
---|
[5836] | 933 | ! |
---|
| 934 | #if defined key_cice && defined key_asminc |
---|
| 935 | ndaice_da(:,:) = 0._wp ! Sea-ice : CICE case. Zero ice increment tendency into CICE |
---|
[3764] | 936 | #endif |
---|
[5836] | 937 | ! |
---|
[3764] | 938 | ENDIF |
---|
| 939 | |
---|
[9570] | 940 | !#if defined defined key_si3 || defined key_cice |
---|
[3764] | 941 | ! |
---|
| 942 | ! IF (ln_seaicebal ) THEN |
---|
| 943 | ! !! balancing salinity increments |
---|
| 944 | ! !! simple case from limflx.F90 (doesn't include a mass flux) |
---|
| 945 | ! !! assumption is that as ice concentration is reduced or increased |
---|
| 946 | ! !! the snow and ice depths remain constant |
---|
| 947 | ! !! note that snow is being created where ice concentration is being increased |
---|
| 948 | ! !! - could be more sophisticated and |
---|
| 949 | ! !! not do this (but would need to alter h_snow) |
---|
| 950 | ! |
---|
| 951 | ! usave(:,:,:)=sb(:,:,:) ! use array as a temporary store |
---|
| 952 | ! |
---|
| 953 | ! DO jj = 1, jpj |
---|
| 954 | ! DO ji = 1, jpi |
---|
| 955 | ! ! calculate change in ice and snow mass per unit area |
---|
| 956 | ! ! positive values imply adding salt to the ocean (results from ice formation) |
---|
| 957 | ! ! fwf : ice formation and melting |
---|
| 958 | ! |
---|
| 959 | ! zfons = ( -nfresh_da(ji,jj)*soce + nfsalt_da(ji,jj) )*rdt |
---|
| 960 | ! |
---|
| 961 | ! ! change salinity down to mixed layer depth |
---|
| 962 | ! mld=hmld_kara(ji,jj) |
---|
| 963 | ! |
---|
| 964 | ! ! prevent small mld |
---|
| 965 | ! ! less than 10m can cause salinity instability |
---|
| 966 | ! IF (mld < 10) mld=10 |
---|
| 967 | ! |
---|
| 968 | ! ! set to bottom of a level |
---|
| 969 | ! DO jk = jpk-1, 2, -1 |
---|
| 970 | ! IF ((mld > gdepw(ji,jj,jk)) .and. (mld < gdepw(ji,jj,jk+1))) THEN |
---|
| 971 | ! mld=gdepw(ji,jj,jk+1) |
---|
| 972 | ! jkmax=jk |
---|
| 973 | ! ENDIF |
---|
| 974 | ! ENDDO |
---|
| 975 | ! |
---|
| 976 | ! ! avoid applying salinity balancing in shallow water or on land |
---|
| 977 | ! ! |
---|
| 978 | ! |
---|
| 979 | ! ! dsal_ocn (psu kg m^-2) / (kg m^-3 * m) |
---|
| 980 | ! |
---|
| 981 | ! dsal_ocn=0.0_wp |
---|
| 982 | ! sal_thresh=5.0_wp ! minimum salinity threshold for salinity balancing |
---|
| 983 | ! |
---|
| 984 | ! if (tmask(ji,jj,1) > 0 .AND. tmask(ji,jj,jkmax) > 0 ) & |
---|
| 985 | ! dsal_ocn = zfons / (rhop(ji,jj,1) * mld) |
---|
| 986 | ! |
---|
| 987 | ! ! put increments in for levels in the mixed layer |
---|
| 988 | ! ! but prevent salinity below a threshold value |
---|
| 989 | ! |
---|
| 990 | ! DO jk = 1, jkmax |
---|
| 991 | ! |
---|
| 992 | ! IF (dsal_ocn > 0.0_wp .or. sb(ji,jj,jk)+dsal_ocn > sal_thresh) THEN |
---|
| 993 | ! sb(ji,jj,jk) = sb(ji,jj,jk) + dsal_ocn |
---|
| 994 | ! sn(ji,jj,jk) = sn(ji,jj,jk) + dsal_ocn |
---|
| 995 | ! ENDIF |
---|
| 996 | ! |
---|
| 997 | ! ENDDO |
---|
| 998 | ! |
---|
| 999 | ! ! ! salt exchanges at the ice/ocean interface |
---|
| 1000 | ! ! zpmess = zfons / rdt_ice ! rdt_ice is ice timestep |
---|
| 1001 | ! ! |
---|
| 1002 | ! !! Adjust fsalt. A +ve fsalt means adding salt to ocean |
---|
| 1003 | ! !! fsalt(ji,jj) = fsalt(ji,jj) + zpmess ! adjust fsalt |
---|
| 1004 | ! !! |
---|
| 1005 | ! !! emps(ji,jj) = emps(ji,jj) + zpmess ! or adjust emps (see icestp1d) |
---|
| 1006 | ! !! ! E-P (kg m-2 s-2) |
---|
| 1007 | ! ! emp(ji,jj) = emp(ji,jj) + zpmess ! E-P (kg m-2 s-2) |
---|
| 1008 | ! ENDDO !ji |
---|
| 1009 | ! ENDDO !jj! |
---|
| 1010 | ! |
---|
| 1011 | ! ENDIF !ln_seaicebal |
---|
| 1012 | ! |
---|
| 1013 | !#endif |
---|
[5836] | 1014 | ! |
---|
[3764] | 1015 | ENDIF |
---|
[5836] | 1016 | ! |
---|
[3764] | 1017 | END SUBROUTINE seaice_asm_inc |
---|
[3785] | 1018 | |
---|
[2392] | 1019 | !!====================================================================== |
---|
[2128] | 1020 | END MODULE asminc |
---|