[2128] | 1 | MODULE asminc |
---|
| 2 | !!====================================================================== |
---|
| 3 | !! *** MODULE asminc *** |
---|
| 4 | !! Assimilation increment : Apply an increment generated by data |
---|
| 5 | !! assimilation |
---|
| 6 | !!====================================================================== |
---|
[2392] | 7 | !! History : ! 2007-03 (M. Martin) Met Office version |
---|
| 8 | !! ! 2007-04 (A. Weaver) calc_date original code |
---|
| 9 | !! ! 2007-04 (A. Weaver) Merge with OPAVAR/NEMOVAR |
---|
| 10 | !! NEMO 3.3 ! 2010-05 (D. Lea) Update to work with NEMO v3.2 |
---|
| 11 | !! - ! 2010-05 (D. Lea) add calc_month_len routine based on day_init |
---|
[3764] | 12 | !! 3.4 ! 2012-10 (A. Weaver and K. Mogensen) Fix for direct initialization |
---|
[6140] | 13 | !! ! 2014-09 (D. Lea) Local calc_date removed use routine from OBS |
---|
| 14 | !! ! 2015-11 (D. Lea) Handle non-zero initial time of day |
---|
[2392] | 15 | !!---------------------------------------------------------------------- |
---|
[2128] | 16 | |
---|
| 17 | !!---------------------------------------------------------------------- |
---|
[3785] | 18 | !! asm_inc_init : Initialize the increment arrays and IAU weights |
---|
| 19 | !! tra_asm_inc : Apply the tracer (T and S) increments |
---|
| 20 | !! dyn_asm_inc : Apply the dynamic (u and v) increments |
---|
| 21 | !! ssh_asm_inc : Apply the SSH increment |
---|
[9023] | 22 | !! ssh_asm_div : Apply divergence associated with SSH increment |
---|
[3785] | 23 | !! seaice_asm_inc : Apply the seaice increment |
---|
[2128] | 24 | !!---------------------------------------------------------------------- |
---|
[9019] | 25 | USE oce ! Dynamics and active tracers defined in memory |
---|
| 26 | USE par_oce ! Ocean space and time domain variables |
---|
| 27 | USE dom_oce ! Ocean space and time domain |
---|
| 28 | USE domvvl ! domain: variable volume level |
---|
| 29 | USE ldfdyn ! lateral diffusion: eddy viscosity coefficients |
---|
| 30 | USE eosbn2 ! Equation of state - in situ and potential density |
---|
| 31 | USE zpshde ! Partial step : Horizontal Derivative |
---|
| 32 | USE asmpar ! Parameters for the assmilation interface |
---|
[9254] | 33 | USE asmbkg ! |
---|
[9019] | 34 | USE c1d ! 1D initialization |
---|
| 35 | USE sbc_oce ! Surface boundary condition variables. |
---|
| 36 | USE diaobs , ONLY : calc_date ! Compute the calendar date on a given step |
---|
[9570] | 37 | #if defined key_si3 |
---|
[9019] | 38 | USE ice , ONLY : hm_i, at_i, at_i_b |
---|
[3764] | 39 | #endif |
---|
[9019] | 40 | ! |
---|
| 41 | USE in_out_manager ! I/O manager |
---|
| 42 | USE iom ! Library to read input files |
---|
| 43 | USE lib_mpp ! MPP library |
---|
[2128] | 44 | |
---|
| 45 | IMPLICIT NONE |
---|
| 46 | PRIVATE |
---|
[2392] | 47 | |
---|
| 48 | PUBLIC asm_inc_init !: Initialize the increment arrays and IAU weights |
---|
| 49 | PUBLIC tra_asm_inc !: Apply the tracer (T and S) increments |
---|
| 50 | PUBLIC dyn_asm_inc !: Apply the dynamic (u and v) increments |
---|
| 51 | PUBLIC ssh_asm_inc !: Apply the SSH increment |
---|
[9023] | 52 | PUBLIC ssh_asm_div !: Apply the SSH divergence |
---|
[3764] | 53 | PUBLIC seaice_asm_inc !: Apply the seaice increment |
---|
[2128] | 54 | |
---|
| 55 | #if defined key_asminc |
---|
[2392] | 56 | LOGICAL, PUBLIC, PARAMETER :: lk_asminc = .TRUE. !: Logical switch for assimilation increment interface |
---|
[2128] | 57 | #else |
---|
[2392] | 58 | LOGICAL, PUBLIC, PARAMETER :: lk_asminc = .FALSE. !: No assimilation increments |
---|
[2128] | 59 | #endif |
---|
[5836] | 60 | LOGICAL, PUBLIC :: ln_bkgwri !: No output of the background state fields |
---|
| 61 | LOGICAL, PUBLIC :: ln_asmiau !: No applying forcing with an assimilation increment |
---|
| 62 | LOGICAL, PUBLIC :: ln_asmdin !: No direct initialization |
---|
| 63 | LOGICAL, PUBLIC :: ln_trainc !: No tracer (T and S) assimilation increments |
---|
| 64 | LOGICAL, PUBLIC :: ln_dyninc !: No dynamics (u and v) assimilation increments |
---|
| 65 | LOGICAL, PUBLIC :: ln_sshinc !: No sea surface height assimilation increment |
---|
| 66 | LOGICAL, PUBLIC :: ln_seaiceinc !: No sea ice concentration increment |
---|
| 67 | LOGICAL, PUBLIC :: ln_salfix !: Apply minimum salinity check |
---|
[3764] | 68 | LOGICAL, PUBLIC :: ln_temnofreeze = .FALSE. !: Don't allow the temperature to drop below freezing |
---|
[5836] | 69 | INTEGER, PUBLIC :: nn_divdmp !: Apply divergence damping filter nn_divdmp times |
---|
[2128] | 70 | |
---|
[2392] | 71 | REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE :: t_bkg , s_bkg !: Background temperature and salinity |
---|
| 72 | REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE :: u_bkg , v_bkg !: Background u- & v- velocity components |
---|
| 73 | REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE :: t_bkginc, s_bkginc !: Increment to the background T & S |
---|
| 74 | REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE :: u_bkginc, v_bkginc !: Increment to the u- & v-components |
---|
| 75 | REAL(wp), PUBLIC, DIMENSION(:) , ALLOCATABLE :: wgtiau !: IAU weights for each time step |
---|
[2128] | 76 | #if defined key_asminc |
---|
[9213] | 77 | REAL(wp), PUBLIC, DIMENSION(:,:) , ALLOCATABLE :: ssh_iau !: IAU-weighted sea surface height increment |
---|
[2128] | 78 | #endif |
---|
[2392] | 79 | ! !!! time steps relative to the cycle interval [0,nitend-nit000-1] |
---|
| 80 | INTEGER , PUBLIC :: nitbkg !: Time step of the background state used in the Jb term |
---|
| 81 | INTEGER , PUBLIC :: nitdin !: Time step of the background state for direct initialization |
---|
| 82 | INTEGER , PUBLIC :: nitiaustr !: Time step of the start of the IAU interval |
---|
| 83 | INTEGER , PUBLIC :: nitiaufin !: Time step of the end of the IAU interval |
---|
| 84 | ! |
---|
| 85 | INTEGER , PUBLIC :: niaufn !: Type of IAU weighing function: = 0 Constant weighting |
---|
| 86 | ! !: = 1 Linear hat-like, centred in middle of IAU interval |
---|
| 87 | REAL(wp), PUBLIC :: salfixmin !: Ensure that the salinity is larger than this value if (ln_salfix) |
---|
[2128] | 88 | |
---|
[2392] | 89 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: ssh_bkg, ssh_bkginc ! Background sea surface height and its increment |
---|
[3764] | 90 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: seaice_bkginc ! Increment to the background sea ice conc |
---|
[8030] | 91 | #if defined key_cice && defined key_asminc |
---|
| 92 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: ndaice_da ! ice increment tendency into CICE |
---|
| 93 | #endif |
---|
[2128] | 94 | |
---|
[3294] | 95 | !! * Substitutions |
---|
[12377] | 96 | # include "do_loop_substitute.h90" |
---|
[13237] | 97 | # include "domzgr_substitute.h90" |
---|
[2287] | 98 | !!---------------------------------------------------------------------- |
---|
[9598] | 99 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
---|
[2287] | 100 | !! $Id$ |
---|
[10068] | 101 | !! Software governed by the CeCILL license (see ./LICENSE) |
---|
[2287] | 102 | !!---------------------------------------------------------------------- |
---|
[2128] | 103 | CONTAINS |
---|
| 104 | |
---|
[12377] | 105 | SUBROUTINE asm_inc_init( Kbb, Kmm, Krhs ) |
---|
[2128] | 106 | !!---------------------------------------------------------------------- |
---|
| 107 | !! *** ROUTINE asm_inc_init *** |
---|
| 108 | !! |
---|
| 109 | !! ** Purpose : Initialize the assimilation increment and IAU weights. |
---|
| 110 | !! |
---|
| 111 | !! ** Method : Initialize the assimilation increment and IAU weights. |
---|
| 112 | !! |
---|
| 113 | !! ** Action : |
---|
| 114 | !!---------------------------------------------------------------------- |
---|
[12377] | 115 | INTEGER, INTENT(in) :: Kbb, Kmm, Krhs ! time level indices |
---|
| 116 | ! |
---|
[4990] | 117 | INTEGER :: ji, jj, jk, jt ! dummy loop indices |
---|
| 118 | INTEGER :: imid, inum ! local integers |
---|
| 119 | INTEGER :: ios ! Local integer output status for namelist read |
---|
[2128] | 120 | INTEGER :: iiauper ! Number of time steps in the IAU period |
---|
| 121 | INTEGER :: icycper ! Number of time steps in the cycle |
---|
[6140] | 122 | REAL(KIND=dp) :: ditend_date ! Date YYYYMMDD.HHMMSS of final time step |
---|
| 123 | REAL(KIND=dp) :: ditbkg_date ! Date YYYYMMDD.HHMMSS of background time step for Jb term |
---|
| 124 | REAL(KIND=dp) :: ditdin_date ! Date YYYYMMDD.HHMMSS of background time step for DI |
---|
| 125 | REAL(KIND=dp) :: ditiaustr_date ! Date YYYYMMDD.HHMMSS of IAU interval start time step |
---|
| 126 | REAL(KIND=dp) :: ditiaufin_date ! Date YYYYMMDD.HHMMSS of IAU interval final time step |
---|
| 127 | |
---|
[2128] | 128 | REAL(wp) :: znorm ! Normalization factor for IAU weights |
---|
[4990] | 129 | REAL(wp) :: ztotwgt ! Value of time-integrated IAU weights (should be equal to one) |
---|
[2128] | 130 | REAL(wp) :: z_inc_dateb ! Start date of interval on which increment is valid |
---|
| 131 | REAL(wp) :: z_inc_datef ! End date of interval on which increment is valid |
---|
| 132 | REAL(wp) :: zdate_bkg ! Date in background state file for DI |
---|
| 133 | REAL(wp) :: zdate_inc ! Time axis in increments file |
---|
[4990] | 134 | ! |
---|
[9019] | 135 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zhdiv ! 2D workspace |
---|
[2392] | 136 | !! |
---|
[3764] | 137 | NAMELIST/nam_asminc/ ln_bkgwri, & |
---|
[2392] | 138 | & ln_trainc, ln_dyninc, ln_sshinc, & |
---|
| 139 | & ln_asmdin, ln_asmiau, & |
---|
| 140 | & nitbkg, nitdin, nitiaustr, nitiaufin, niaufn, & |
---|
[4990] | 141 | & ln_salfix, salfixmin, nn_divdmp |
---|
[2392] | 142 | !!---------------------------------------------------------------------- |
---|
[2128] | 143 | |
---|
| 144 | !----------------------------------------------------------------------- |
---|
| 145 | ! Read Namelist nam_asminc : assimilation increment interface |
---|
| 146 | !----------------------------------------------------------------------- |
---|
[5836] | 147 | ln_seaiceinc = .FALSE. |
---|
[3764] | 148 | ln_temnofreeze = .FALSE. |
---|
[2128] | 149 | |
---|
[4147] | 150 | READ ( numnam_ref, nam_asminc, IOSTAT = ios, ERR = 901) |
---|
[11536] | 151 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nam_asminc in reference namelist' ) |
---|
[4147] | 152 | READ ( numnam_cfg, nam_asminc, IOSTAT = ios, ERR = 902 ) |
---|
[11536] | 153 | 902 IF( ios > 0 ) CALL ctl_nam ( ios , 'nam_asminc in configuration namelist' ) |
---|
[4624] | 154 | IF(lwm) WRITE ( numond, nam_asminc ) |
---|
[4147] | 155 | |
---|
[2128] | 156 | ! Control print |
---|
| 157 | IF(lwp) THEN |
---|
| 158 | WRITE(numout,*) |
---|
| 159 | WRITE(numout,*) 'asm_inc_init : Assimilation increment initialization :' |
---|
| 160 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
[2392] | 161 | WRITE(numout,*) ' Namelist namasm : set assimilation increment parameters' |
---|
| 162 | WRITE(numout,*) ' Logical switch for writing out background state ln_bkgwri = ', ln_bkgwri |
---|
| 163 | WRITE(numout,*) ' Logical switch for applying tracer increments ln_trainc = ', ln_trainc |
---|
| 164 | WRITE(numout,*) ' Logical switch for applying velocity increments ln_dyninc = ', ln_dyninc |
---|
| 165 | WRITE(numout,*) ' Logical switch for applying SSH increments ln_sshinc = ', ln_sshinc |
---|
| 166 | WRITE(numout,*) ' Logical switch for Direct Initialization (DI) ln_asmdin = ', ln_asmdin |
---|
[3764] | 167 | WRITE(numout,*) ' Logical switch for applying sea ice increments ln_seaiceinc = ', ln_seaiceinc |
---|
[2392] | 168 | WRITE(numout,*) ' Logical switch for Incremental Analysis Updating (IAU) ln_asmiau = ', ln_asmiau |
---|
| 169 | WRITE(numout,*) ' Timestep of background in [0,nitend-nit000-1] nitbkg = ', nitbkg |
---|
| 170 | WRITE(numout,*) ' Timestep of background for DI in [0,nitend-nit000-1] nitdin = ', nitdin |
---|
| 171 | WRITE(numout,*) ' Timestep of start of IAU interval in [0,nitend-nit000-1] nitiaustr = ', nitiaustr |
---|
| 172 | WRITE(numout,*) ' Timestep of end of IAU interval in [0,nitend-nit000-1] nitiaufin = ', nitiaufin |
---|
| 173 | WRITE(numout,*) ' Type of IAU weighting function niaufn = ', niaufn |
---|
| 174 | WRITE(numout,*) ' Logical switch for ensuring that the sa > salfixmin ln_salfix = ', ln_salfix |
---|
| 175 | WRITE(numout,*) ' Minimum salinity after applying the increments salfixmin = ', salfixmin |
---|
[2128] | 176 | ENDIF |
---|
| 177 | |
---|
[9019] | 178 | nitbkg_r = nitbkg + nit000 - 1 ! Background time referenced to nit000 |
---|
| 179 | nitdin_r = nitdin + nit000 - 1 ! Background time for DI referenced to nit000 |
---|
| 180 | nitiaustr_r = nitiaustr + nit000 - 1 ! Start of IAU interval referenced to nit000 |
---|
| 181 | nitiaufin_r = nitiaufin + nit000 - 1 ! End of IAU interval referenced to nit000 |
---|
[2128] | 182 | |
---|
[9019] | 183 | iiauper = nitiaufin_r - nitiaustr_r + 1 ! IAU interval length |
---|
| 184 | icycper = nitend - nit000 + 1 ! Cycle interval length |
---|
[2128] | 185 | |
---|
[9019] | 186 | CALL calc_date( nitend , ditend_date ) ! Date of final time step |
---|
| 187 | CALL calc_date( nitbkg_r , ditbkg_date ) ! Background time for Jb referenced to ndate0 |
---|
| 188 | CALL calc_date( nitdin_r , ditdin_date ) ! Background time for DI referenced to ndate0 |
---|
| 189 | CALL calc_date( nitiaustr_r, ditiaustr_date ) ! IAU start time referenced to ndate0 |
---|
| 190 | CALL calc_date( nitiaufin_r, ditiaufin_date ) ! IAU end time referenced to ndate0 |
---|
[6140] | 191 | |
---|
[2128] | 192 | IF(lwp) THEN |
---|
| 193 | WRITE(numout,*) |
---|
| 194 | WRITE(numout,*) ' Time steps referenced to current cycle:' |
---|
| 195 | WRITE(numout,*) ' iitrst = ', nit000 - 1 |
---|
| 196 | WRITE(numout,*) ' nit000 = ', nit000 |
---|
| 197 | WRITE(numout,*) ' nitend = ', nitend |
---|
| 198 | WRITE(numout,*) ' nitbkg_r = ', nitbkg_r |
---|
| 199 | WRITE(numout,*) ' nitdin_r = ', nitdin_r |
---|
| 200 | WRITE(numout,*) ' nitiaustr_r = ', nitiaustr_r |
---|
| 201 | WRITE(numout,*) ' nitiaufin_r = ', nitiaufin_r |
---|
| 202 | WRITE(numout,*) |
---|
| 203 | WRITE(numout,*) ' Dates referenced to current cycle:' |
---|
| 204 | WRITE(numout,*) ' ndastp = ', ndastp |
---|
| 205 | WRITE(numout,*) ' ndate0 = ', ndate0 |
---|
[6140] | 206 | WRITE(numout,*) ' nn_time0 = ', nn_time0 |
---|
| 207 | WRITE(numout,*) ' ditend_date = ', ditend_date |
---|
| 208 | WRITE(numout,*) ' ditbkg_date = ', ditbkg_date |
---|
| 209 | WRITE(numout,*) ' ditdin_date = ', ditdin_date |
---|
| 210 | WRITE(numout,*) ' ditiaustr_date = ', ditiaustr_date |
---|
| 211 | WRITE(numout,*) ' ditiaufin_date = ', ditiaufin_date |
---|
[2128] | 212 | ENDIF |
---|
| 213 | |
---|
| 214 | |
---|
| 215 | IF ( ( ln_asmdin ).AND.( ln_asmiau ) ) & |
---|
| 216 | & CALL ctl_stop( ' ln_asmdin and ln_asmiau :', & |
---|
| 217 | & ' Choose Direct Initialization OR Incremental Analysis Updating') |
---|
| 218 | |
---|
| 219 | IF ( ( ( .NOT. ln_asmdin ).AND.( .NOT. ln_asmiau ) ) & |
---|
[3764] | 220 | .AND.( ( ln_trainc ).OR.( ln_dyninc ).OR.( ln_sshinc ) .OR. ( ln_seaiceinc) )) & |
---|
| 221 | & CALL ctl_stop( ' One or more of ln_trainc, ln_dyninc, ln_sshinc and ln_seaiceinc is set to .true.', & |
---|
[2128] | 222 | & ' but ln_asmdin and ln_asmiau are both set to .false. :', & |
---|
| 223 | & ' Inconsistent options') |
---|
| 224 | |
---|
| 225 | IF ( ( niaufn /= 0 ).AND.( niaufn /= 1 ) ) & |
---|
| 226 | & CALL ctl_stop( ' niaufn /= 0 or niaufn /=1 :', & |
---|
| 227 | & ' Type IAU weighting function is invalid') |
---|
| 228 | |
---|
[3764] | 229 | IF ( ( .NOT. ln_trainc ).AND.( .NOT. ln_dyninc ).AND.( .NOT. ln_sshinc ).AND.( .NOT. ln_seaiceinc ) & |
---|
[2128] | 230 | & ) & |
---|
[3764] | 231 | & CALL ctl_warn( ' ln_trainc, ln_dyninc, ln_sshinc and ln_seaiceinc are set to .false. :', & |
---|
[2128] | 232 | & ' The assimilation increments are not applied') |
---|
| 233 | |
---|
| 234 | IF ( ( ln_asmiau ).AND.( nitiaustr == nitiaufin ) ) & |
---|
| 235 | & CALL ctl_stop( ' nitiaustr = nitiaufin :', & |
---|
| 236 | & ' IAU interval is of zero length') |
---|
| 237 | |
---|
| 238 | IF ( ( ln_asmiau ).AND.( ( nitiaustr_r < nit000 ).OR.( nitiaufin_r > nitend ) ) ) & |
---|
| 239 | & CALL ctl_stop( ' nitiaustr or nitiaufin :', & |
---|
| 240 | & ' IAU starting or final time step is outside the cycle interval', & |
---|
| 241 | & ' Valid range nit000 to nitend') |
---|
| 242 | |
---|
| 243 | IF ( ( nitbkg_r < nit000 - 1 ).OR.( nitbkg_r > nitend ) ) & |
---|
| 244 | & CALL ctl_stop( ' nitbkg :', & |
---|
| 245 | & ' Background time step is outside the cycle interval') |
---|
| 246 | |
---|
| 247 | IF ( ( nitdin_r < nit000 - 1 ).OR.( nitdin_r > nitend ) ) & |
---|
| 248 | & CALL ctl_stop( ' nitdin :', & |
---|
| 249 | & ' Background time step for Direct Initialization is outside', & |
---|
| 250 | & ' the cycle interval') |
---|
| 251 | |
---|
| 252 | IF ( nstop > 0 ) RETURN ! if there are any errors then go no further |
---|
| 253 | |
---|
| 254 | !-------------------------------------------------------------------- |
---|
| 255 | ! Initialize the Incremental Analysis Updating weighting function |
---|
| 256 | !-------------------------------------------------------------------- |
---|
| 257 | |
---|
[9213] | 258 | IF( ln_asmiau ) THEN |
---|
| 259 | ! |
---|
[2128] | 260 | ALLOCATE( wgtiau( icycper ) ) |
---|
[9213] | 261 | ! |
---|
[9019] | 262 | wgtiau(:) = 0._wp |
---|
[9213] | 263 | ! |
---|
| 264 | ! !--------------------------------------------------------- |
---|
| 265 | IF( niaufn == 0 ) THEN ! Constant IAU forcing |
---|
| 266 | ! !--------------------------------------------------------- |
---|
[2128] | 267 | DO jt = 1, iiauper |
---|
| 268 | wgtiau(jt+nitiaustr-1) = 1.0 / REAL( iiauper ) |
---|
| 269 | END DO |
---|
[9213] | 270 | ! !--------------------------------------------------------- |
---|
| 271 | ELSEIF ( niaufn == 1 ) THEN ! Linear hat-like, centred in middle of IAU interval |
---|
| 272 | ! !--------------------------------------------------------- |
---|
[2128] | 273 | ! Compute the normalization factor |
---|
[9213] | 274 | znorm = 0._wp |
---|
| 275 | IF( MOD( iiauper, 2 ) == 0 ) THEN ! Even number of time steps in IAU interval |
---|
[2128] | 276 | imid = iiauper / 2 |
---|
| 277 | DO jt = 1, imid |
---|
| 278 | znorm = znorm + REAL( jt ) |
---|
| 279 | END DO |
---|
| 280 | znorm = 2.0 * znorm |
---|
[9213] | 281 | ELSE ! Odd number of time steps in IAU interval |
---|
[2128] | 282 | imid = ( iiauper + 1 ) / 2 |
---|
| 283 | DO jt = 1, imid - 1 |
---|
| 284 | znorm = znorm + REAL( jt ) |
---|
| 285 | END DO |
---|
| 286 | znorm = 2.0 * znorm + REAL( imid ) |
---|
| 287 | ENDIF |
---|
| 288 | znorm = 1.0 / znorm |
---|
[9213] | 289 | ! |
---|
[2128] | 290 | DO jt = 1, imid - 1 |
---|
| 291 | wgtiau(jt+nitiaustr-1) = REAL( jt ) * znorm |
---|
| 292 | END DO |
---|
| 293 | DO jt = imid, iiauper |
---|
| 294 | wgtiau(jt+nitiaustr-1) = REAL( iiauper - jt + 1 ) * znorm |
---|
| 295 | END DO |
---|
[9213] | 296 | ! |
---|
[2128] | 297 | ENDIF |
---|
| 298 | |
---|
| 299 | ! Test that the integral of the weights over the weighting interval equals 1 |
---|
| 300 | IF(lwp) THEN |
---|
| 301 | WRITE(numout,*) |
---|
| 302 | WRITE(numout,*) 'asm_inc_init : IAU weights' |
---|
| 303 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
| 304 | WRITE(numout,*) ' time step IAU weight' |
---|
| 305 | WRITE(numout,*) ' ========= =====================' |
---|
| 306 | ztotwgt = 0.0 |
---|
| 307 | DO jt = 1, icycper |
---|
| 308 | ztotwgt = ztotwgt + wgtiau(jt) |
---|
| 309 | WRITE(numout,*) ' ', jt, ' ', wgtiau(jt) |
---|
| 310 | END DO |
---|
| 311 | WRITE(numout,*) ' ===================================' |
---|
| 312 | WRITE(numout,*) ' Time-integrated weight = ', ztotwgt |
---|
| 313 | WRITE(numout,*) ' ===================================' |
---|
| 314 | ENDIF |
---|
| 315 | |
---|
| 316 | ENDIF |
---|
| 317 | |
---|
| 318 | !-------------------------------------------------------------------- |
---|
| 319 | ! Allocate and initialize the increment arrays |
---|
| 320 | !-------------------------------------------------------------------- |
---|
| 321 | |
---|
[9213] | 322 | ALLOCATE( t_bkginc (jpi,jpj,jpk) ) ; t_bkginc (:,:,:) = 0._wp |
---|
| 323 | ALLOCATE( s_bkginc (jpi,jpj,jpk) ) ; s_bkginc (:,:,:) = 0._wp |
---|
| 324 | ALLOCATE( u_bkginc (jpi,jpj,jpk) ) ; u_bkginc (:,:,:) = 0._wp |
---|
| 325 | ALLOCATE( v_bkginc (jpi,jpj,jpk) ) ; v_bkginc (:,:,:) = 0._wp |
---|
| 326 | ALLOCATE( ssh_bkginc (jpi,jpj) ) ; ssh_bkginc (:,:) = 0._wp |
---|
| 327 | ALLOCATE( seaice_bkginc(jpi,jpj) ) ; seaice_bkginc(:,:) = 0._wp |
---|
[2128] | 328 | #if defined key_asminc |
---|
[9213] | 329 | ALLOCATE( ssh_iau (jpi,jpj) ) ; ssh_iau (:,:) = 0._wp |
---|
[2128] | 330 | #endif |
---|
[8030] | 331 | #if defined key_cice && defined key_asminc |
---|
[9213] | 332 | ALLOCATE( ndaice_da (jpi,jpj) ) ; ndaice_da (:,:) = 0._wp |
---|
[8030] | 333 | #endif |
---|
[9213] | 334 | ! |
---|
| 335 | IF ( ln_trainc .OR. ln_dyninc .OR. & !-------------------------------------- |
---|
| 336 | & ln_sshinc .OR. ln_seaiceinc ) THEN ! Read the increments from file |
---|
| 337 | ! !-------------------------------------- |
---|
[2128] | 338 | CALL iom_open( c_asminc, inum ) |
---|
[9213] | 339 | ! |
---|
| 340 | CALL iom_get( inum, 'time' , zdate_inc ) |
---|
[2128] | 341 | CALL iom_get( inum, 'z_inc_dateb', z_inc_dateb ) |
---|
| 342 | CALL iom_get( inum, 'z_inc_datef', z_inc_datef ) |
---|
| 343 | z_inc_dateb = zdate_inc |
---|
| 344 | z_inc_datef = zdate_inc |
---|
[9213] | 345 | ! |
---|
[2128] | 346 | IF(lwp) THEN |
---|
| 347 | WRITE(numout,*) |
---|
[9213] | 348 | WRITE(numout,*) 'asm_inc_init : Assimilation increments valid between dates ', z_inc_dateb,' and ', z_inc_datef |
---|
[2128] | 349 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
| 350 | ENDIF |
---|
[9213] | 351 | ! |
---|
| 352 | IF ( ( z_inc_dateb < ndastp + nn_time0*0.0001_wp ) .OR. & |
---|
| 353 | & ( z_inc_datef > ditend_date ) ) & |
---|
| 354 | & CALL ctl_warn( ' Validity time of assimilation increments is ', & |
---|
| 355 | & ' outside the assimilation interval' ) |
---|
[2128] | 356 | |
---|
[6140] | 357 | IF ( ( ln_asmdin ).AND.( zdate_inc /= ditdin_date ) ) & |
---|
[2128] | 358 | & CALL ctl_warn( ' Validity time of assimilation increments does ', & |
---|
| 359 | & ' not agree with Direct Initialization time' ) |
---|
| 360 | |
---|
| 361 | IF ( ln_trainc ) THEN |
---|
[13286] | 362 | CALL iom_get( inum, jpdom_auto, 'bckint', t_bkginc, 1 ) |
---|
| 363 | CALL iom_get( inum, jpdom_auto, 'bckins', s_bkginc, 1 ) |
---|
[2128] | 364 | ! Apply the masks |
---|
| 365 | t_bkginc(:,:,:) = t_bkginc(:,:,:) * tmask(:,:,:) |
---|
| 366 | s_bkginc(:,:,:) = s_bkginc(:,:,:) * tmask(:,:,:) |
---|
| 367 | ! Set missing increments to 0.0 rather than 1e+20 |
---|
| 368 | ! to allow for differences in masks |
---|
| 369 | WHERE( ABS( t_bkginc(:,:,:) ) > 1.0e+10 ) t_bkginc(:,:,:) = 0.0 |
---|
| 370 | WHERE( ABS( s_bkginc(:,:,:) ) > 1.0e+10 ) s_bkginc(:,:,:) = 0.0 |
---|
| 371 | ENDIF |
---|
| 372 | |
---|
| 373 | IF ( ln_dyninc ) THEN |
---|
[13286] | 374 | CALL iom_get( inum, jpdom_auto, 'bckinu', u_bkginc, 1 ) |
---|
| 375 | CALL iom_get( inum, jpdom_auto, 'bckinv', v_bkginc, 1 ) |
---|
[2128] | 376 | ! Apply the masks |
---|
| 377 | u_bkginc(:,:,:) = u_bkginc(:,:,:) * umask(:,:,:) |
---|
| 378 | v_bkginc(:,:,:) = v_bkginc(:,:,:) * vmask(:,:,:) |
---|
| 379 | ! Set missing increments to 0.0 rather than 1e+20 |
---|
| 380 | ! to allow for differences in masks |
---|
| 381 | WHERE( ABS( u_bkginc(:,:,:) ) > 1.0e+10 ) u_bkginc(:,:,:) = 0.0 |
---|
| 382 | WHERE( ABS( v_bkginc(:,:,:) ) > 1.0e+10 ) v_bkginc(:,:,:) = 0.0 |
---|
| 383 | ENDIF |
---|
| 384 | |
---|
| 385 | IF ( ln_sshinc ) THEN |
---|
[13286] | 386 | CALL iom_get( inum, jpdom_auto, 'bckineta', ssh_bkginc, 1 ) |
---|
[2128] | 387 | ! Apply the masks |
---|
| 388 | ssh_bkginc(:,:) = ssh_bkginc(:,:) * tmask(:,:,1) |
---|
| 389 | ! Set missing increments to 0.0 rather than 1e+20 |
---|
| 390 | ! to allow for differences in masks |
---|
| 391 | WHERE( ABS( ssh_bkginc(:,:) ) > 1.0e+10 ) ssh_bkginc(:,:) = 0.0 |
---|
| 392 | ENDIF |
---|
| 393 | |
---|
[3764] | 394 | IF ( ln_seaiceinc ) THEN |
---|
[13286] | 395 | CALL iom_get( inum, jpdom_auto, 'bckinseaice', seaice_bkginc, 1 ) |
---|
[3764] | 396 | ! Apply the masks |
---|
| 397 | seaice_bkginc(:,:) = seaice_bkginc(:,:) * tmask(:,:,1) |
---|
| 398 | ! Set missing increments to 0.0 rather than 1e+20 |
---|
| 399 | ! to allow for differences in masks |
---|
| 400 | WHERE( ABS( seaice_bkginc(:,:) ) > 1.0e+10 ) seaice_bkginc(:,:) = 0.0 |
---|
| 401 | ENDIF |
---|
[9213] | 402 | ! |
---|
[2128] | 403 | CALL iom_close( inum ) |
---|
[9213] | 404 | ! |
---|
[2128] | 405 | ENDIF |
---|
[9213] | 406 | ! |
---|
| 407 | ! !-------------------------------------- |
---|
| 408 | IF ( ln_dyninc .AND. nn_divdmp > 0 ) THEN ! Apply divergence damping filter |
---|
| 409 | ! !-------------------------------------- |
---|
[9019] | 410 | ALLOCATE( zhdiv(jpi,jpj) ) |
---|
[5836] | 411 | ! |
---|
| 412 | DO jt = 1, nn_divdmp |
---|
| 413 | ! |
---|
[9019] | 414 | DO jk = 1, jpkm1 ! zhdiv = e1e1 * div |
---|
| 415 | zhdiv(:,:) = 0._wp |
---|
[12377] | 416 | DO_2D_00_00 |
---|
| 417 | zhdiv(ji,jj) = ( e2u(ji ,jj) * e3u(ji ,jj,jk,Kmm) * u_bkginc(ji ,jj,jk) & |
---|
| 418 | & - e2u(ji-1,jj) * e3u(ji-1,jj,jk,Kmm) * u_bkginc(ji-1,jj,jk) & |
---|
| 419 | & + e1v(ji,jj ) * e3v(ji,jj ,jk,Kmm) * v_bkginc(ji,jj ,jk) & |
---|
[13237] | 420 | & - e1v(ji,jj-1) * e3v(ji,jj-1,jk,Kmm) * v_bkginc(ji,jj-1,jk) ) & |
---|
| 421 | & / e3t(ji,jj,jk,Kmm) |
---|
[12377] | 422 | END_2D |
---|
[13226] | 423 | CALL lbc_lnk( 'asminc', zhdiv, 'T', 1.0_wp ) ! lateral boundary cond. (no sign change) |
---|
[5836] | 424 | ! |
---|
[12377] | 425 | DO_2D_00_00 |
---|
| 426 | u_bkginc(ji,jj,jk) = u_bkginc(ji,jj,jk) & |
---|
| 427 | & + 0.2_wp * ( zhdiv(ji+1,jj) - zhdiv(ji ,jj) ) * r1_e1u(ji,jj) * umask(ji,jj,jk) |
---|
| 428 | v_bkginc(ji,jj,jk) = v_bkginc(ji,jj,jk) & |
---|
| 429 | & + 0.2_wp * ( zhdiv(ji,jj+1) - zhdiv(ji,jj ) ) * r1_e2v(ji,jj) * vmask(ji,jj,jk) |
---|
| 430 | END_2D |
---|
[3294] | 431 | END DO |
---|
[5836] | 432 | ! |
---|
[3764] | 433 | END DO |
---|
[5836] | 434 | ! |
---|
[9019] | 435 | DEALLOCATE( zhdiv ) |
---|
[5836] | 436 | ! |
---|
[3294] | 437 | ENDIF |
---|
[9213] | 438 | ! |
---|
| 439 | ! !----------------------------------------------------- |
---|
| 440 | IF ( ln_asmdin ) THEN ! Allocate and initialize the background state arrays |
---|
| 441 | ! !----------------------------------------------------- |
---|
[5836] | 442 | ! |
---|
[9213] | 443 | ALLOCATE( t_bkg (jpi,jpj,jpk) ) ; t_bkg (:,:,:) = 0._wp |
---|
| 444 | ALLOCATE( s_bkg (jpi,jpj,jpk) ) ; s_bkg (:,:,:) = 0._wp |
---|
| 445 | ALLOCATE( u_bkg (jpi,jpj,jpk) ) ; u_bkg (:,:,:) = 0._wp |
---|
| 446 | ALLOCATE( v_bkg (jpi,jpj,jpk) ) ; v_bkg (:,:,:) = 0._wp |
---|
| 447 | ALLOCATE( ssh_bkg(jpi,jpj) ) ; ssh_bkg(:,:) = 0._wp |
---|
[5836] | 448 | ! |
---|
| 449 | ! |
---|
[2128] | 450 | !-------------------------------------------------------------------- |
---|
| 451 | ! Read from file the background state at analysis time |
---|
| 452 | !-------------------------------------------------------------------- |
---|
[5836] | 453 | ! |
---|
[2128] | 454 | CALL iom_open( c_asmdin, inum ) |
---|
[5836] | 455 | ! |
---|
[3764] | 456 | CALL iom_get( inum, 'rdastp', zdate_bkg ) |
---|
[5836] | 457 | ! |
---|
[2128] | 458 | IF(lwp) THEN |
---|
| 459 | WRITE(numout,*) |
---|
[9213] | 460 | WRITE(numout,*) ' ==>>> Assimilation background state valid at : ', zdate_bkg |
---|
| 461 | WRITE(numout,*) |
---|
[2128] | 462 | ENDIF |
---|
[5836] | 463 | ! |
---|
[9213] | 464 | IF ( zdate_bkg /= ditdin_date ) & |
---|
[2128] | 465 | & CALL ctl_warn( ' Validity time of assimilation background state does', & |
---|
| 466 | & ' not agree with Direct Initialization time' ) |
---|
[5836] | 467 | ! |
---|
[2128] | 468 | IF ( ln_trainc ) THEN |
---|
[13286] | 469 | CALL iom_get( inum, jpdom_auto, 'tn', t_bkg ) |
---|
| 470 | CALL iom_get( inum, jpdom_auto, 'sn', s_bkg ) |
---|
[2128] | 471 | t_bkg(:,:,:) = t_bkg(:,:,:) * tmask(:,:,:) |
---|
| 472 | s_bkg(:,:,:) = s_bkg(:,:,:) * tmask(:,:,:) |
---|
| 473 | ENDIF |
---|
[5836] | 474 | ! |
---|
[2128] | 475 | IF ( ln_dyninc ) THEN |
---|
[13286] | 476 | CALL iom_get( inum, jpdom_auto, 'un', u_bkg, cd_type = 'U', psgn = 1._wp ) |
---|
| 477 | CALL iom_get( inum, jpdom_auto, 'vn', v_bkg, cd_type = 'V', psgn = 1._wp ) |
---|
[2128] | 478 | u_bkg(:,:,:) = u_bkg(:,:,:) * umask(:,:,:) |
---|
| 479 | v_bkg(:,:,:) = v_bkg(:,:,:) * vmask(:,:,:) |
---|
| 480 | ENDIF |
---|
[5836] | 481 | ! |
---|
[2128] | 482 | IF ( ln_sshinc ) THEN |
---|
[13286] | 483 | CALL iom_get( inum, jpdom_auto, 'sshn', ssh_bkg ) |
---|
[2128] | 484 | ssh_bkg(:,:) = ssh_bkg(:,:) * tmask(:,:,1) |
---|
| 485 | ENDIF |
---|
[5836] | 486 | ! |
---|
[2128] | 487 | CALL iom_close( inum ) |
---|
[5836] | 488 | ! |
---|
[2128] | 489 | ENDIF |
---|
[2392] | 490 | ! |
---|
[12489] | 491 | IF(lwp) WRITE(numout,*) ' ==>>> Euler time step switch is ', l_1st_euler |
---|
[9213] | 492 | ! |
---|
| 493 | IF( lk_asminc ) THEN !== data assimilation ==! |
---|
[12377] | 494 | IF( ln_bkgwri ) CALL asm_bkg_wri( nit000 - 1, Kmm ) ! Output background fields |
---|
[9213] | 495 | IF( ln_asmdin ) THEN ! Direct initialization |
---|
[12377] | 496 | IF( ln_trainc ) CALL tra_asm_inc( nit000 - 1, Kbb, Kmm, ts , Krhs ) ! Tracers |
---|
| 497 | IF( ln_dyninc ) CALL dyn_asm_inc( nit000 - 1, Kbb, Kmm, uu, vv, Krhs ) ! Dynamics |
---|
| 498 | IF( ln_sshinc ) CALL ssh_asm_inc( nit000 - 1, Kbb, Kmm ) ! SSH |
---|
[9213] | 499 | ENDIF |
---|
| 500 | ENDIF |
---|
| 501 | ! |
---|
[2128] | 502 | END SUBROUTINE asm_inc_init |
---|
[9213] | 503 | |
---|
| 504 | |
---|
[12377] | 505 | SUBROUTINE tra_asm_inc( kt, Kbb, Kmm, pts, Krhs ) |
---|
[2128] | 506 | !!---------------------------------------------------------------------- |
---|
| 507 | !! *** ROUTINE tra_asm_inc *** |
---|
| 508 | !! |
---|
| 509 | !! ** Purpose : Apply the tracer (T and S) assimilation increments |
---|
| 510 | !! |
---|
| 511 | !! ** Method : Direct initialization or Incremental Analysis Updating |
---|
| 512 | !! |
---|
| 513 | !! ** Action : |
---|
| 514 | !!---------------------------------------------------------------------- |
---|
[12377] | 515 | INTEGER , INTENT(in ) :: kt ! Current time step |
---|
| 516 | INTEGER , INTENT(in ) :: Kbb, Kmm, Krhs ! Time level indices |
---|
| 517 | REAL(wp), DIMENSION(jpi,jpj,jpk,jpts,jpt), INTENT(inout) :: pts ! active tracers and RHS of tracer equation |
---|
[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 |
---|
[12377] | 528 | CALL eos_fzp( pts(:,:,jk,jp_sal,Kmm), fzptnz(:,:,jk), gdept(:,:,jk,Kmm) ) |
---|
[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 |
---|
[12489] | 538 | zincwgt = wgtiau(it) / rn_Dt ! 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. & |
---|
[12377] | 551 | & pts(:,:,jk,jp_tem,Kmm) + pts(:,:,jk,jp_tem,Krhs) + t_bkginc(:,:,jk) * wgtiau(it) > fzptnz(:,:,jk) ) |
---|
| 552 | pts(:,:,jk,jp_tem,Krhs) = pts(:,:,jk,jp_tem,Krhs) + t_bkginc(:,:,jk) * zincwgt |
---|
[3764] | 553 | END WHERE |
---|
| 554 | ELSE |
---|
[12377] | 555 | pts(:,:,jk,jp_tem,Krhs) = pts(:,:,jk,jp_tem,Krhs) + t_bkginc(:,:,jk) * zincwgt |
---|
[3764] | 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. & |
---|
[12377] | 561 | & pts(:,:,jk,jp_sal,Kmm) + pts(:,:,jk,jp_sal,Krhs) + s_bkginc(:,:,jk) * wgtiau(it) > salfixmin ) |
---|
| 562 | pts(:,:,jk,jp_sal,Krhs) = pts(:,:,jk,jp_sal,Krhs) + s_bkginc(:,:,jk) * zincwgt |
---|
[3764] | 563 | END WHERE |
---|
| 564 | ELSE |
---|
[12377] | 565 | pts(:,:,jk,jp_sal,Krhs) = pts(:,:,jk,jp_sal,Krhs) + s_bkginc(:,:,jk) * zincwgt |
---|
[3764] | 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 | ! |
---|
[12489] | 581 | l_1st_euler = .TRUE. ! 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 |
---|
[12377] | 586 | WHERE( t_bkginc(:,:,:) > 0.0_wp .OR. pts(:,:,:,jp_tem,Kmm) + t_bkginc(:,:,:) > fzptnz(:,:,:) ) |
---|
| 587 | pts(:,:,:,jp_tem,Kmm) = t_bkg(:,:,:) + t_bkginc(:,:,:) |
---|
[3764] | 588 | END WHERE |
---|
| 589 | ELSE |
---|
[12377] | 590 | pts(:,:,:,jp_tem,Kmm) = t_bkg(:,:,:) + t_bkginc(:,:,:) |
---|
[3764] | 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 |
---|
[12377] | 595 | WHERE( s_bkginc(:,:,:) > 0.0_wp .OR. pts(:,:,:,jp_sal,Kmm) + s_bkginc(:,:,:) > salfixmin ) |
---|
| 596 | pts(:,:,:,jp_sal,Kmm) = s_bkg(:,:,:) + s_bkginc(:,:,:) |
---|
[3764] | 597 | END WHERE |
---|
| 598 | ELSE |
---|
[12377] | 599 | pts(:,:,:,jp_sal,Kmm) = s_bkg(:,:,:) + s_bkginc(:,:,:) |
---|
[2128] | 600 | ENDIF |
---|
| 601 | |
---|
[12377] | 602 | pts(:,:,:,:,Kbb) = pts(:,:,:,:,Kmm) ! Update before fields |
---|
[2128] | 603 | |
---|
[12377] | 604 | CALL eos( pts(:,:,:,:,Kbb), rhd, rhop, gdept_0(:,:,:) ) ! Before potential and in situ densities |
---|
[4990] | 605 | !!gm fabien |
---|
[12377] | 606 | ! CALL eos( pts(:,:,:,:,Kbb), rhd, rhop ) ! Before potential and in situ densities |
---|
[4990] | 607 | !!gm |
---|
| 608 | |
---|
[12377] | 609 | IF( ln_zps .AND. .NOT. lk_c1d .AND. .NOT. ln_isfcav) & |
---|
| 610 | & CALL zps_hde ( kt, Kmm, jpts, pts(:,:,:,:,Kbb), 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, Kmm, jpts, pts(:,:,:,:,Kbb), 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 |
---|
[6140] | 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 | |
---|
[12377] | 629 | SUBROUTINE dyn_asm_inc( kt, Kbb, Kmm, puu, pvv, Krhs ) |
---|
[2128] | 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 | !!---------------------------------------------------------------------- |
---|
[12377] | 639 | INTEGER , INTENT( in ) :: kt ! ocean time-step index |
---|
| 640 | INTEGER , INTENT( in ) :: Kbb, Kmm, Krhs ! ocean time level indices |
---|
| 641 | REAL(wp), DIMENSION(jpi,jpj,jpk,jpt), INTENT(inout) :: puu, pvv ! ocean velocities and RHS of momentum equation |
---|
[2392] | 642 | ! |
---|
[2128] | 643 | INTEGER :: jk |
---|
| 644 | INTEGER :: it |
---|
| 645 | REAL(wp) :: zincwgt ! IAU weight for current time step |
---|
[2392] | 646 | !!---------------------------------------------------------------------- |
---|
[5836] | 647 | ! |
---|
| 648 | ! !-------------------------------------------- |
---|
| 649 | IF ( ln_asmiau ) THEN ! Incremental Analysis Updating |
---|
| 650 | ! !-------------------------------------------- |
---|
| 651 | ! |
---|
[2128] | 652 | IF ( ( kt >= nitiaustr_r ).AND.( kt <= nitiaufin_r ) ) THEN |
---|
[5836] | 653 | ! |
---|
[2128] | 654 | it = kt - nit000 + 1 |
---|
[12489] | 655 | zincwgt = wgtiau(it) / rn_Dt ! IAU weight for the current time step |
---|
[5836] | 656 | ! |
---|
[2128] | 657 | IF(lwp) THEN |
---|
| 658 | WRITE(numout,*) |
---|
[5836] | 659 | WRITE(numout,*) 'dyn_asm_inc : Dynamics IAU at time step = ', kt,' with IAU weight = ', wgtiau(it) |
---|
[2128] | 660 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
| 661 | ENDIF |
---|
[5836] | 662 | ! |
---|
[2128] | 663 | ! Update the dynamic tendencies |
---|
| 664 | DO jk = 1, jpkm1 |
---|
[12377] | 665 | puu(:,:,jk,Krhs) = puu(:,:,jk,Krhs) + u_bkginc(:,:,jk) * zincwgt |
---|
| 666 | pvv(:,:,jk,Krhs) = pvv(:,:,jk,Krhs) + v_bkginc(:,:,jk) * zincwgt |
---|
[2128] | 667 | END DO |
---|
[5836] | 668 | ! |
---|
[2128] | 669 | IF ( kt == nitiaufin_r ) THEN |
---|
| 670 | DEALLOCATE( u_bkginc ) |
---|
| 671 | DEALLOCATE( v_bkginc ) |
---|
| 672 | ENDIF |
---|
[5836] | 673 | ! |
---|
[2128] | 674 | ENDIF |
---|
[5836] | 675 | ! !----------------------------------------- |
---|
| 676 | ELSEIF ( ln_asmdin ) THEN ! Direct Initialization |
---|
| 677 | ! !----------------------------------------- |
---|
| 678 | ! |
---|
[2128] | 679 | IF ( kt == nitdin_r ) THEN |
---|
[5836] | 680 | ! |
---|
[12489] | 681 | l_1st_euler = .TRUE. ! Force Euler forward step |
---|
[5836] | 682 | ! |
---|
[2128] | 683 | ! Initialize the now fields with the background + increment |
---|
[12377] | 684 | puu(:,:,:,Kmm) = u_bkg(:,:,:) + u_bkginc(:,:,:) |
---|
| 685 | pvv(:,:,:,Kmm) = v_bkg(:,:,:) + v_bkginc(:,:,:) |
---|
[5836] | 686 | ! |
---|
[12377] | 687 | puu(:,:,:,Kbb) = puu(:,:,:,Kmm) ! Update before fields |
---|
| 688 | pvv(:,:,:,Kbb) = pvv(:,:,:,Kmm) |
---|
[5836] | 689 | ! |
---|
[2128] | 690 | DEALLOCATE( u_bkg ) |
---|
| 691 | DEALLOCATE( v_bkg ) |
---|
| 692 | DEALLOCATE( u_bkginc ) |
---|
| 693 | DEALLOCATE( v_bkginc ) |
---|
| 694 | ENDIF |
---|
[2392] | 695 | ! |
---|
[2128] | 696 | ENDIF |
---|
[2392] | 697 | ! |
---|
[2128] | 698 | END SUBROUTINE dyn_asm_inc |
---|
| 699 | |
---|
[2392] | 700 | |
---|
[12377] | 701 | SUBROUTINE ssh_asm_inc( kt, Kbb, Kmm ) |
---|
[2128] | 702 | !!---------------------------------------------------------------------- |
---|
| 703 | !! *** ROUTINE ssh_asm_inc *** |
---|
| 704 | !! |
---|
| 705 | !! ** Purpose : Apply the sea surface height assimilation increment. |
---|
| 706 | !! |
---|
| 707 | !! ** Method : Direct initialization or Incremental Analysis Updating. |
---|
| 708 | !! |
---|
| 709 | !! ** Action : |
---|
| 710 | !!---------------------------------------------------------------------- |
---|
[12377] | 711 | INTEGER, INTENT(IN) :: kt ! Current time step |
---|
| 712 | INTEGER, INTENT(IN) :: Kbb, Kmm ! Current time step |
---|
[2392] | 713 | ! |
---|
[2128] | 714 | INTEGER :: it |
---|
[3764] | 715 | INTEGER :: jk |
---|
[2128] | 716 | REAL(wp) :: zincwgt ! IAU weight for current time step |
---|
[2392] | 717 | !!---------------------------------------------------------------------- |
---|
[5836] | 718 | ! |
---|
| 719 | ! !----------------------------------------- |
---|
| 720 | IF ( ln_asmiau ) THEN ! Incremental Analysis Updating |
---|
| 721 | ! !----------------------------------------- |
---|
| 722 | ! |
---|
[2128] | 723 | IF ( ( kt >= nitiaustr_r ).AND.( kt <= nitiaufin_r ) ) THEN |
---|
[5836] | 724 | ! |
---|
[2128] | 725 | it = kt - nit000 + 1 |
---|
[12489] | 726 | zincwgt = wgtiau(it) / rn_Dt ! IAU weight for the current time step |
---|
[5836] | 727 | ! |
---|
[2128] | 728 | IF(lwp) THEN |
---|
| 729 | WRITE(numout,*) |
---|
| 730 | WRITE(numout,*) 'ssh_asm_inc : SSH IAU at time step = ', & |
---|
| 731 | & kt,' with IAU weight = ', wgtiau(it) |
---|
| 732 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
| 733 | ENDIF |
---|
[5836] | 734 | ! |
---|
[2128] | 735 | ! Save the tendency associated with the IAU weighted SSH increment |
---|
| 736 | ! (applied in dynspg.*) |
---|
| 737 | #if defined key_asminc |
---|
| 738 | ssh_iau(:,:) = ssh_bkginc(:,:) * zincwgt |
---|
| 739 | #endif |
---|
[5836] | 740 | ! |
---|
[8547] | 741 | ELSE IF( kt == nitiaufin_r+1 ) THEN |
---|
[8546] | 742 | ! |
---|
[9465] | 743 | ! test on ssh_bkginc needed as ssh_asm_inc is called twice by time step |
---|
| 744 | IF (ALLOCATED(ssh_bkginc)) DEALLOCATE( ssh_bkginc ) |
---|
| 745 | ! |
---|
| 746 | #if defined key_asminc |
---|
[8546] | 747 | ssh_iau(:,:) = 0._wp |
---|
[9465] | 748 | #endif |
---|
[8546] | 749 | ! |
---|
[2128] | 750 | ENDIF |
---|
[5836] | 751 | ! !----------------------------------------- |
---|
| 752 | ELSEIF ( ln_asmdin ) THEN ! Direct Initialization |
---|
| 753 | ! !----------------------------------------- |
---|
| 754 | ! |
---|
[2128] | 755 | IF ( kt == nitdin_r ) THEN |
---|
[5836] | 756 | ! |
---|
[12489] | 757 | l_1st_euler = .TRUE. ! Force Euler forward step |
---|
[5836] | 758 | ! |
---|
[12377] | 759 | ssh(:,:,Kmm) = ssh_bkg(:,:) + ssh_bkginc(:,:) ! Initialize the now fields the background + increment |
---|
[5836] | 760 | ! |
---|
[12377] | 761 | ssh(:,:,Kbb) = ssh(:,:,Kmm) ! Update before fields |
---|
[13237] | 762 | #if ! defined key_qco |
---|
[12377] | 763 | e3t(:,:,:,Kbb) = e3t(:,:,:,Kmm) |
---|
[13237] | 764 | #endif |
---|
[12377] | 765 | !!gm why not e3u(:,:,:,Kbb), e3v(:,:,:,Kbb), gdept(:,:,:,Kbb) ???? |
---|
[5836] | 766 | ! |
---|
[2128] | 767 | DEALLOCATE( ssh_bkg ) |
---|
| 768 | DEALLOCATE( ssh_bkginc ) |
---|
[5836] | 769 | ! |
---|
[2128] | 770 | ENDIF |
---|
[2392] | 771 | ! |
---|
[2128] | 772 | ENDIF |
---|
[2392] | 773 | ! |
---|
[2128] | 774 | END SUBROUTINE ssh_asm_inc |
---|
| 775 | |
---|
[9213] | 776 | |
---|
[12377] | 777 | SUBROUTINE ssh_asm_div( kt, Kbb, Kmm, phdivn ) |
---|
[9023] | 778 | !!---------------------------------------------------------------------- |
---|
| 779 | !! *** ROUTINE ssh_asm_div *** |
---|
| 780 | !! |
---|
| 781 | !! ** Purpose : ssh increment with z* is incorporated via a correction of the local divergence |
---|
| 782 | !! across all the water column |
---|
| 783 | !! |
---|
| 784 | !! ** Method : |
---|
| 785 | !! CAUTION : sshiau is positive (inflow) decreasing the |
---|
| 786 | !! divergence and expressed in m/s |
---|
| 787 | !! |
---|
| 788 | !! ** Action : phdivn decreased by the ssh increment |
---|
| 789 | !!---------------------------------------------------------------------- |
---|
| 790 | INTEGER, INTENT(IN) :: kt ! ocean time-step index |
---|
[12377] | 791 | INTEGER, INTENT(IN) :: Kbb, Kmm ! time level indices |
---|
[9023] | 792 | REAL(wp), DIMENSION(:,:,:), INTENT(inout) :: phdivn ! horizontal divergence |
---|
| 793 | !! |
---|
| 794 | INTEGER :: jk ! dummy loop index |
---|
| 795 | REAL(wp), DIMENSION(:,:) , POINTER :: ztim ! local array |
---|
| 796 | !!---------------------------------------------------------------------- |
---|
| 797 | ! |
---|
| 798 | #if defined key_asminc |
---|
[12377] | 799 | CALL ssh_asm_inc( kt, Kbb, Kmm ) !== (calculate increments) |
---|
[9023] | 800 | ! |
---|
| 801 | IF( ln_linssh ) THEN |
---|
[12377] | 802 | phdivn(:,:,1) = phdivn(:,:,1) - ssh_iau(:,:) / e3t(:,:,1,Kmm) * tmask(:,:,1) |
---|
[9023] | 803 | ELSE |
---|
[9044] | 804 | ALLOCATE( ztim(jpi,jpj) ) |
---|
[12377] | 805 | ztim(:,:) = ssh_iau(:,:) / ( ht(:,:) + 1.0 - ssmask(:,:) ) |
---|
[9023] | 806 | DO jk = 1, jpkm1 |
---|
| 807 | phdivn(:,:,jk) = phdivn(:,:,jk) - ztim(:,:) * tmask(:,:,jk) |
---|
| 808 | END DO |
---|
| 809 | ! |
---|
[9044] | 810 | DEALLOCATE(ztim) |
---|
[9023] | 811 | ENDIF |
---|
| 812 | #endif |
---|
| 813 | ! |
---|
| 814 | END SUBROUTINE ssh_asm_div |
---|
[3785] | 815 | |
---|
[9213] | 816 | |
---|
[3764] | 817 | SUBROUTINE seaice_asm_inc( kt, kindic ) |
---|
| 818 | !!---------------------------------------------------------------------- |
---|
| 819 | !! *** ROUTINE seaice_asm_inc *** |
---|
| 820 | !! |
---|
| 821 | !! ** Purpose : Apply the sea ice assimilation increment. |
---|
| 822 | !! |
---|
| 823 | !! ** Method : Direct initialization or Incremental Analysis Updating. |
---|
| 824 | !! |
---|
| 825 | !! ** Action : |
---|
| 826 | !! |
---|
| 827 | !!---------------------------------------------------------------------- |
---|
[5836] | 828 | INTEGER, INTENT(in) :: kt ! Current time step |
---|
[3785] | 829 | INTEGER, INTENT(in), OPTIONAL :: kindic ! flag for disabling the deallocation |
---|
| 830 | ! |
---|
| 831 | INTEGER :: it |
---|
| 832 | REAL(wp) :: zincwgt ! IAU weight for current time step |
---|
[9570] | 833 | #if defined key_si3 |
---|
[9656] | 834 | REAL(wp), DIMENSION(jpi,jpj) :: zofrld, zohicif, zseaicendg, zhicifinc |
---|
[3785] | 835 | REAL(wp) :: zhicifmin = 0.5_wp ! ice minimum depth in metres |
---|
[3764] | 836 | #endif |
---|
[3785] | 837 | !!---------------------------------------------------------------------- |
---|
[5836] | 838 | ! |
---|
| 839 | ! !----------------------------------------- |
---|
| 840 | IF ( ln_asmiau ) THEN ! Incremental Analysis Updating |
---|
| 841 | ! !----------------------------------------- |
---|
| 842 | ! |
---|
[3764] | 843 | IF ( ( kt >= nitiaustr_r ).AND.( kt <= nitiaufin_r ) ) THEN |
---|
[5836] | 844 | ! |
---|
[3764] | 845 | it = kt - nit000 + 1 |
---|
| 846 | zincwgt = wgtiau(it) ! IAU weight for the current time step |
---|
[12489] | 847 | ! note this is not a tendency so should not be divided by rn_Dt (as with the tracer and other increments) |
---|
[5836] | 848 | ! |
---|
[3764] | 849 | IF(lwp) THEN |
---|
| 850 | WRITE(numout,*) |
---|
[5836] | 851 | WRITE(numout,*) 'seaice_asm_inc : sea ice conc IAU at time step = ', kt,' with IAU weight = ', wgtiau(it) |
---|
[3764] | 852 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
| 853 | ENDIF |
---|
[5836] | 854 | ! |
---|
[9656] | 855 | ! Sea-ice : SI3 case |
---|
[5836] | 856 | ! |
---|
[9570] | 857 | #if defined key_si3 |
---|
[9019] | 858 | zofrld (:,:) = 1._wp - at_i(:,:) |
---|
| 859 | zohicif(:,:) = hm_i(:,:) |
---|
[3785] | 860 | ! |
---|
[9019] | 861 | at_i (:,:) = 1. - MIN( MAX( 1.-at_i (:,:) - seaice_bkginc(:,:) * zincwgt, 0.0_wp), 1.0_wp) |
---|
| 862 | at_i_b(:,:) = 1. - MIN( MAX( 1.-at_i_b(:,:) - seaice_bkginc(:,:) * zincwgt, 0.0_wp), 1.0_wp) |
---|
| 863 | fr_i(:,:) = at_i(:,:) ! adjust ice fraction |
---|
[3785] | 864 | ! |
---|
[9019] | 865 | zseaicendg(:,:) = zofrld(:,:) - (1. - at_i(:,:)) ! find out actual sea ice nudge applied |
---|
[3785] | 866 | ! |
---|
[3764] | 867 | ! Nudge sea ice depth to bring it up to a required minimum depth |
---|
[9019] | 868 | WHERE( zseaicendg(:,:) > 0.0_wp .AND. hm_i(:,:) < zhicifmin ) |
---|
| 869 | zhicifinc(:,:) = (zhicifmin - hm_i(:,:)) * zincwgt |
---|
[3764] | 870 | ELSEWHERE |
---|
| 871 | zhicifinc(:,:) = 0.0_wp |
---|
| 872 | END WHERE |
---|
[3785] | 873 | ! |
---|
| 874 | ! nudge ice depth |
---|
[9019] | 875 | hm_i (:,:) = hm_i (:,:) + zhicifinc(:,:) |
---|
[3785] | 876 | ! |
---|
| 877 | ! seaice salinity balancing (to add) |
---|
[3764] | 878 | #endif |
---|
[9213] | 879 | ! |
---|
[4245] | 880 | #if defined key_cice && defined key_asminc |
---|
[3785] | 881 | ! Sea-ice : CICE case. Pass ice increment tendency into CICE |
---|
[12489] | 882 | ndaice_da(:,:) = seaice_bkginc(:,:) * zincwgt / rn_Dt |
---|
[3764] | 883 | #endif |
---|
[9213] | 884 | ! |
---|
[3764] | 885 | IF ( kt == nitiaufin_r ) THEN |
---|
| 886 | DEALLOCATE( seaice_bkginc ) |
---|
| 887 | ENDIF |
---|
[9213] | 888 | ! |
---|
[3764] | 889 | ELSE |
---|
[9213] | 890 | ! |
---|
[4245] | 891 | #if defined key_cice && defined key_asminc |
---|
[5836] | 892 | ndaice_da(:,:) = 0._wp ! Sea-ice : CICE case. Zero ice increment tendency into CICE |
---|
[3764] | 893 | #endif |
---|
[9213] | 894 | ! |
---|
[3764] | 895 | ENDIF |
---|
[5836] | 896 | ! !----------------------------------------- |
---|
| 897 | ELSEIF ( ln_asmdin ) THEN ! Direct Initialization |
---|
| 898 | ! !----------------------------------------- |
---|
| 899 | ! |
---|
[3764] | 900 | IF ( kt == nitdin_r ) THEN |
---|
[5836] | 901 | ! |
---|
[12713] | 902 | l_1st_euler = .TRUE. ! Force Euler forward step |
---|
[5836] | 903 | ! |
---|
[9656] | 904 | ! Sea-ice : SI3 case |
---|
[5836] | 905 | ! |
---|
[9570] | 906 | #if defined key_si3 |
---|
[9019] | 907 | zofrld (:,:) = 1._wp - at_i(:,:) |
---|
| 908 | zohicif(:,:) = hm_i(:,:) |
---|
[3785] | 909 | ! |
---|
[3764] | 910 | ! Initialize the now fields the background + increment |
---|
[9019] | 911 | at_i(:,:) = 1. - MIN( MAX( 1.-at_i(:,:) - seaice_bkginc(:,:), 0.0_wp), 1.0_wp) |
---|
| 912 | at_i_b(:,:) = at_i(:,:) |
---|
| 913 | fr_i(:,:) = at_i(:,:) ! adjust ice fraction |
---|
[3785] | 914 | ! |
---|
[9019] | 915 | zseaicendg(:,:) = zofrld(:,:) - (1. - at_i(:,:)) ! find out actual sea ice nudge applied |
---|
| 916 | ! |
---|
[3764] | 917 | ! Nudge sea ice depth to bring it up to a required minimum depth |
---|
[9019] | 918 | WHERE( zseaicendg(:,:) > 0.0_wp .AND. hm_i(:,:) < zhicifmin ) |
---|
[10355] | 919 | zhicifinc(:,:) = zhicifmin - hm_i(:,:) |
---|
[3764] | 920 | ELSEWHERE |
---|
[9019] | 921 | zhicifinc(:,:) = 0.0_wp |
---|
[3764] | 922 | END WHERE |
---|
[3785] | 923 | ! |
---|
| 924 | ! nudge ice depth |
---|
[9019] | 925 | hm_i (:,:) = hm_i (:,:) + zhicifinc(:,:) |
---|
[3785] | 926 | ! |
---|
| 927 | ! seaice salinity balancing (to add) |
---|
[3764] | 928 | #endif |
---|
[5836] | 929 | ! |
---|
[4245] | 930 | #if defined key_cice && defined key_asminc |
---|
| 931 | ! Sea-ice : CICE case. Pass ice increment tendency into CICE |
---|
[12489] | 932 | ndaice_da(:,:) = seaice_bkginc(:,:) / rn_Dt |
---|
[3764] | 933 | #endif |
---|
[5836] | 934 | IF ( .NOT. PRESENT(kindic) ) THEN |
---|
| 935 | DEALLOCATE( seaice_bkginc ) |
---|
| 936 | END IF |
---|
| 937 | ! |
---|
[3764] | 938 | ELSE |
---|
[5836] | 939 | ! |
---|
| 940 | #if defined key_cice && defined key_asminc |
---|
| 941 | ndaice_da(:,:) = 0._wp ! Sea-ice : CICE case. Zero ice increment tendency into CICE |
---|
[3764] | 942 | #endif |
---|
[5836] | 943 | ! |
---|
[3764] | 944 | ENDIF |
---|
| 945 | |
---|
[9570] | 946 | !#if defined defined key_si3 || defined key_cice |
---|
[3764] | 947 | ! |
---|
| 948 | ! IF (ln_seaicebal ) THEN |
---|
| 949 | ! !! balancing salinity increments |
---|
| 950 | ! !! simple case from limflx.F90 (doesn't include a mass flux) |
---|
| 951 | ! !! assumption is that as ice concentration is reduced or increased |
---|
| 952 | ! !! the snow and ice depths remain constant |
---|
| 953 | ! !! note that snow is being created where ice concentration is being increased |
---|
| 954 | ! !! - could be more sophisticated and |
---|
| 955 | ! !! not do this (but would need to alter h_snow) |
---|
| 956 | ! |
---|
| 957 | ! usave(:,:,:)=sb(:,:,:) ! use array as a temporary store |
---|
| 958 | ! |
---|
| 959 | ! DO jj = 1, jpj |
---|
| 960 | ! DO ji = 1, jpi |
---|
| 961 | ! ! calculate change in ice and snow mass per unit area |
---|
| 962 | ! ! positive values imply adding salt to the ocean (results from ice formation) |
---|
| 963 | ! ! fwf : ice formation and melting |
---|
| 964 | ! |
---|
[12489] | 965 | ! zfons = ( -nfresh_da(ji,jj)*soce + nfsalt_da(ji,jj) )*rn_Dt |
---|
[3764] | 966 | ! |
---|
| 967 | ! ! change salinity down to mixed layer depth |
---|
| 968 | ! mld=hmld_kara(ji,jj) |
---|
| 969 | ! |
---|
| 970 | ! ! prevent small mld |
---|
| 971 | ! ! less than 10m can cause salinity instability |
---|
| 972 | ! IF (mld < 10) mld=10 |
---|
| 973 | ! |
---|
| 974 | ! ! set to bottom of a level |
---|
| 975 | ! DO jk = jpk-1, 2, -1 |
---|
[13237] | 976 | ! IF ((mld > gdepw(ji,jj,jk,Kmm)) .and. (mld < gdepw(ji,jj,jk+1,Kmm))) THEN |
---|
| 977 | ! mld=gdepw(ji,jj,jk+1,Kmm) |
---|
[3764] | 978 | ! jkmax=jk |
---|
| 979 | ! ENDIF |
---|
| 980 | ! ENDDO |
---|
| 981 | ! |
---|
| 982 | ! ! avoid applying salinity balancing in shallow water or on land |
---|
| 983 | ! ! |
---|
| 984 | ! |
---|
| 985 | ! ! dsal_ocn (psu kg m^-2) / (kg m^-3 * m) |
---|
| 986 | ! |
---|
| 987 | ! dsal_ocn=0.0_wp |
---|
| 988 | ! sal_thresh=5.0_wp ! minimum salinity threshold for salinity balancing |
---|
| 989 | ! |
---|
| 990 | ! if (tmask(ji,jj,1) > 0 .AND. tmask(ji,jj,jkmax) > 0 ) & |
---|
| 991 | ! dsal_ocn = zfons / (rhop(ji,jj,1) * mld) |
---|
| 992 | ! |
---|
| 993 | ! ! put increments in for levels in the mixed layer |
---|
| 994 | ! ! but prevent salinity below a threshold value |
---|
| 995 | ! |
---|
| 996 | ! DO jk = 1, jkmax |
---|
| 997 | ! |
---|
| 998 | ! IF (dsal_ocn > 0.0_wp .or. sb(ji,jj,jk)+dsal_ocn > sal_thresh) THEN |
---|
| 999 | ! sb(ji,jj,jk) = sb(ji,jj,jk) + dsal_ocn |
---|
| 1000 | ! sn(ji,jj,jk) = sn(ji,jj,jk) + dsal_ocn |
---|
| 1001 | ! ENDIF |
---|
| 1002 | ! |
---|
| 1003 | ! ENDDO |
---|
| 1004 | ! |
---|
| 1005 | ! ! ! salt exchanges at the ice/ocean interface |
---|
[12489] | 1006 | ! ! zpmess = zfons / rDt_ice ! rDt_ice is ice timestep |
---|
[3764] | 1007 | ! ! |
---|
| 1008 | ! !! Adjust fsalt. A +ve fsalt means adding salt to ocean |
---|
| 1009 | ! !! fsalt(ji,jj) = fsalt(ji,jj) + zpmess ! adjust fsalt |
---|
| 1010 | ! !! |
---|
| 1011 | ! !! emps(ji,jj) = emps(ji,jj) + zpmess ! or adjust emps (see icestp1d) |
---|
| 1012 | ! !! ! E-P (kg m-2 s-2) |
---|
| 1013 | ! ! emp(ji,jj) = emp(ji,jj) + zpmess ! E-P (kg m-2 s-2) |
---|
| 1014 | ! ENDDO !ji |
---|
| 1015 | ! ENDDO !jj! |
---|
| 1016 | ! |
---|
| 1017 | ! ENDIF !ln_seaicebal |
---|
| 1018 | ! |
---|
| 1019 | !#endif |
---|
[5836] | 1020 | ! |
---|
[3764] | 1021 | ENDIF |
---|
[5836] | 1022 | ! |
---|
[3764] | 1023 | END SUBROUTINE seaice_asm_inc |
---|
[3785] | 1024 | |
---|
[2392] | 1025 | !!====================================================================== |
---|
[2128] | 1026 | END MODULE asminc |
---|