[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 |
---|
[2392] | 13 | !!---------------------------------------------------------------------- |
---|
[2128] | 14 | |
---|
| 15 | !!---------------------------------------------------------------------- |
---|
[3785] | 16 | !! 'key_asminc' : Switch on the assimilation increment interface |
---|
[2128] | 17 | !!---------------------------------------------------------------------- |
---|
[3785] | 18 | !! asm_inc_init : Initialize the increment arrays and IAU weights |
---|
| 19 | !! calc_date : Compute the calendar date YYYYMMDD on a given step |
---|
| 20 | !! tra_asm_inc : Apply the tracer (T and S) increments |
---|
| 21 | !! dyn_asm_inc : Apply the dynamic (u and v) increments |
---|
| 22 | !! ssh_asm_inc : Apply the SSH increment |
---|
| 23 | !! seaice_asm_inc : Apply the seaice increment |
---|
[2128] | 24 | !!---------------------------------------------------------------------- |
---|
[3294] | 25 | USE wrk_nemo ! Memory Allocation |
---|
[2392] | 26 | USE par_oce ! Ocean space and time domain variables |
---|
| 27 | USE dom_oce ! Ocean space and time domain |
---|
[3785] | 28 | USE domvvl ! domain: variable volume level |
---|
[2392] | 29 | USE oce ! Dynamics and active tracers defined in memory |
---|
[3294] | 30 | USE ldfdyn_oce ! ocean dynamics: lateral physics |
---|
[2392] | 31 | USE eosbn2 ! Equation of state - in situ and potential density |
---|
| 32 | USE zpshde ! Partial step : Horizontal Derivative |
---|
| 33 | USE iom ! Library to read input files |
---|
| 34 | USE asmpar ! Parameters for the assmilation interface |
---|
[2435] | 35 | USE c1d ! 1D initialization |
---|
[2715] | 36 | USE in_out_manager ! I/O manager |
---|
[3764] | 37 | USE lib_mpp ! MPP library |
---|
| 38 | #if defined key_lim2 |
---|
| 39 | USE ice_2 ! LIM2 |
---|
| 40 | #endif |
---|
| 41 | USE sbc_oce ! Surface boundary condition variables. |
---|
[2128] | 42 | |
---|
| 43 | IMPLICIT NONE |
---|
| 44 | PRIVATE |
---|
[2392] | 45 | |
---|
| 46 | PUBLIC asm_inc_init !: Initialize the increment arrays and IAU weights |
---|
| 47 | PUBLIC calc_date !: Compute the calendar date YYYYMMDD on a given step |
---|
| 48 | PUBLIC tra_asm_inc !: Apply the tracer (T and S) increments |
---|
| 49 | PUBLIC dyn_asm_inc !: Apply the dynamic (u and v) increments |
---|
| 50 | PUBLIC ssh_asm_inc !: Apply the SSH increment |
---|
[3764] | 51 | PUBLIC seaice_asm_inc !: Apply the seaice increment |
---|
[2128] | 52 | |
---|
| 53 | #if defined key_asminc |
---|
[2392] | 54 | LOGICAL, PUBLIC, PARAMETER :: lk_asminc = .TRUE. !: Logical switch for assimilation increment interface |
---|
[2128] | 55 | #else |
---|
[2392] | 56 | LOGICAL, PUBLIC, PARAMETER :: lk_asminc = .FALSE. !: No assimilation increments |
---|
[2128] | 57 | #endif |
---|
[4998] | 58 | LOGICAL, PUBLIC :: ln_bkgwri = .FALSE. !: No output of the background state fields |
---|
| 59 | LOGICAL, PUBLIC :: ln_asmiau = .FALSE. !: No applying forcing with an assimilation increment |
---|
| 60 | LOGICAL, PUBLIC :: ln_asmdin = .FALSE. !: No direct initialization |
---|
| 61 | LOGICAL, PUBLIC :: ln_trainc = .FALSE. !: No tracer (T and S) assimilation increments |
---|
| 62 | LOGICAL, PUBLIC :: ln_dyninc = .FALSE. !: No dynamics (u and v) assimilation increments |
---|
| 63 | LOGICAL, PUBLIC :: ln_sshinc = .FALSE. !: No sea surface height assimilation increment |
---|
| 64 | LOGICAL, PUBLIC :: ln_seaiceinc !: No sea ice concentration increment |
---|
| 65 | LOGICAL, PUBLIC :: ln_salfix = .FALSE. !: Apply minimum salinity check |
---|
[3764] | 66 | LOGICAL, PUBLIC :: ln_temnofreeze = .FALSE. !: Don't allow the temperature to drop below freezing |
---|
[4998] | 67 | INTEGER, PUBLIC :: nn_divdmp !: Apply divergence damping filter nn_divdmp times |
---|
[2128] | 68 | |
---|
[2392] | 69 | REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE :: t_bkg , s_bkg !: Background temperature and salinity |
---|
| 70 | REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE :: u_bkg , v_bkg !: Background u- & v- velocity components |
---|
| 71 | REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE :: t_bkginc, s_bkginc !: Increment to the background T & S |
---|
| 72 | REAL(wp), PUBLIC, DIMENSION(:,:,:), ALLOCATABLE :: u_bkginc, v_bkginc !: Increment to the u- & v-components |
---|
| 73 | REAL(wp), PUBLIC, DIMENSION(:) , ALLOCATABLE :: wgtiau !: IAU weights for each time step |
---|
[2128] | 74 | #if defined key_asminc |
---|
[2392] | 75 | REAL(wp), PUBLIC, DIMENSION(:,:), ALLOCATABLE :: ssh_iau !: IAU-weighted sea surface height increment |
---|
[2128] | 76 | #endif |
---|
[2392] | 77 | ! !!! time steps relative to the cycle interval [0,nitend-nit000-1] |
---|
| 78 | INTEGER , PUBLIC :: nitbkg !: Time step of the background state used in the Jb term |
---|
| 79 | INTEGER , PUBLIC :: nitdin !: Time step of the background state for direct initialization |
---|
| 80 | INTEGER , PUBLIC :: nitiaustr !: Time step of the start of the IAU interval |
---|
| 81 | INTEGER , PUBLIC :: nitiaufin !: Time step of the end of the IAU interval |
---|
| 82 | ! |
---|
| 83 | INTEGER , PUBLIC :: niaufn !: Type of IAU weighing function: = 0 Constant weighting |
---|
| 84 | ! !: = 1 Linear hat-like, centred in middle of IAU interval |
---|
| 85 | REAL(wp), PUBLIC :: salfixmin !: Ensure that the salinity is larger than this value if (ln_salfix) |
---|
[2128] | 86 | |
---|
[2392] | 87 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: ssh_bkg, ssh_bkginc ! Background sea surface height and its increment |
---|
[3764] | 88 | REAL(wp), DIMENSION(:,:), ALLOCATABLE :: seaice_bkginc ! Increment to the background sea ice conc |
---|
[2128] | 89 | |
---|
[3294] | 90 | !! * Substitutions |
---|
| 91 | # include "domzgr_substitute.h90" |
---|
| 92 | # include "ldfdyn_substitute.h90" |
---|
| 93 | # include "vectopt_loop_substitute.h90" |
---|
[2287] | 94 | !!---------------------------------------------------------------------- |
---|
| 95 | !! NEMO/OPA 3.3 , NEMO Consortium (2010) |
---|
| 96 | !! $Id$ |
---|
[2392] | 97 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
---|
[2287] | 98 | !!---------------------------------------------------------------------- |
---|
[2128] | 99 | CONTAINS |
---|
| 100 | |
---|
| 101 | SUBROUTINE asm_inc_init |
---|
| 102 | !!---------------------------------------------------------------------- |
---|
| 103 | !! *** ROUTINE asm_inc_init *** |
---|
| 104 | !! |
---|
| 105 | !! ** Purpose : Initialize the assimilation increment and IAU weights. |
---|
| 106 | !! |
---|
| 107 | !! ** Method : Initialize the assimilation increment and IAU weights. |
---|
| 108 | !! |
---|
| 109 | !! ** Action : |
---|
| 110 | !!---------------------------------------------------------------------- |
---|
[4990] | 111 | INTEGER :: ji, jj, jk, jt ! dummy loop indices |
---|
| 112 | INTEGER :: imid, inum ! local integers |
---|
| 113 | INTEGER :: ios ! Local integer output status for namelist read |
---|
[2128] | 114 | INTEGER :: iiauper ! Number of time steps in the IAU period |
---|
| 115 | INTEGER :: icycper ! Number of time steps in the cycle |
---|
| 116 | INTEGER :: iitend_date ! Date YYYYMMDD of final time step |
---|
| 117 | INTEGER :: iitbkg_date ! Date YYYYMMDD of background time step for Jb term |
---|
| 118 | INTEGER :: iitdin_date ! Date YYYYMMDD of background time step for DI |
---|
| 119 | INTEGER :: iitiaustr_date ! Date YYYYMMDD of IAU interval start time step |
---|
| 120 | INTEGER :: iitiaufin_date ! Date YYYYMMDD of IAU interval final time step |
---|
[4990] | 121 | ! |
---|
[2128] | 122 | REAL(wp) :: znorm ! Normalization factor for IAU weights |
---|
[4990] | 123 | REAL(wp) :: ztotwgt ! Value of time-integrated IAU weights (should be equal to one) |
---|
[2128] | 124 | REAL(wp) :: z_inc_dateb ! Start date of interval on which increment is valid |
---|
| 125 | REAL(wp) :: z_inc_datef ! End date of interval on which increment is valid |
---|
| 126 | REAL(wp) :: zdate_bkg ! Date in background state file for DI |
---|
| 127 | REAL(wp) :: zdate_inc ! Time axis in increments file |
---|
[4990] | 128 | ! |
---|
| 129 | REAL(wp), POINTER, DIMENSION(:,:) :: hdiv ! 2D workspace |
---|
[2392] | 130 | !! |
---|
[3764] | 131 | NAMELIST/nam_asminc/ ln_bkgwri, & |
---|
[2392] | 132 | & ln_trainc, ln_dyninc, ln_sshinc, & |
---|
| 133 | & ln_asmdin, ln_asmiau, & |
---|
| 134 | & nitbkg, nitdin, nitiaustr, nitiaufin, niaufn, & |
---|
[4990] | 135 | & ln_salfix, salfixmin, nn_divdmp |
---|
[2392] | 136 | !!---------------------------------------------------------------------- |
---|
[2128] | 137 | |
---|
| 138 | !----------------------------------------------------------------------- |
---|
| 139 | ! Read Namelist nam_asminc : assimilation increment interface |
---|
| 140 | !----------------------------------------------------------------------- |
---|
[3764] | 141 | ln_seaiceinc = .FALSE. |
---|
| 142 | ln_temnofreeze = .FALSE. |
---|
[2128] | 143 | |
---|
[4147] | 144 | REWIND( numnam_ref ) ! Namelist nam_asminc in reference namelist : Assimilation increment |
---|
| 145 | READ ( numnam_ref, nam_asminc, IOSTAT = ios, ERR = 901) |
---|
| 146 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nam_asminc in reference namelist', lwp ) |
---|
[2128] | 147 | |
---|
[4147] | 148 | REWIND( numnam_cfg ) ! Namelist nam_asminc in configuration namelist : Assimilation increment |
---|
| 149 | READ ( numnam_cfg, nam_asminc, IOSTAT = ios, ERR = 902 ) |
---|
| 150 | 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nam_asminc in configuration namelist', lwp ) |
---|
[4624] | 151 | IF(lwm) WRITE ( numond, nam_asminc ) |
---|
[4147] | 152 | |
---|
[2128] | 153 | ! Control print |
---|
| 154 | IF(lwp) THEN |
---|
| 155 | WRITE(numout,*) |
---|
| 156 | WRITE(numout,*) 'asm_inc_init : Assimilation increment initialization :' |
---|
| 157 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
[2392] | 158 | WRITE(numout,*) ' Namelist namasm : set assimilation increment parameters' |
---|
| 159 | WRITE(numout,*) ' Logical switch for writing out background state ln_bkgwri = ', ln_bkgwri |
---|
| 160 | WRITE(numout,*) ' Logical switch for applying tracer increments ln_trainc = ', ln_trainc |
---|
| 161 | WRITE(numout,*) ' Logical switch for applying velocity increments ln_dyninc = ', ln_dyninc |
---|
| 162 | WRITE(numout,*) ' Logical switch for applying SSH increments ln_sshinc = ', ln_sshinc |
---|
| 163 | WRITE(numout,*) ' Logical switch for Direct Initialization (DI) ln_asmdin = ', ln_asmdin |
---|
[3764] | 164 | WRITE(numout,*) ' Logical switch for applying sea ice increments ln_seaiceinc = ', ln_seaiceinc |
---|
[2392] | 165 | WRITE(numout,*) ' Logical switch for Incremental Analysis Updating (IAU) ln_asmiau = ', ln_asmiau |
---|
| 166 | WRITE(numout,*) ' Timestep of background in [0,nitend-nit000-1] nitbkg = ', nitbkg |
---|
| 167 | WRITE(numout,*) ' Timestep of background for DI in [0,nitend-nit000-1] nitdin = ', nitdin |
---|
| 168 | WRITE(numout,*) ' Timestep of start of IAU interval in [0,nitend-nit000-1] nitiaustr = ', nitiaustr |
---|
| 169 | WRITE(numout,*) ' Timestep of end of IAU interval in [0,nitend-nit000-1] nitiaufin = ', nitiaufin |
---|
| 170 | WRITE(numout,*) ' Type of IAU weighting function niaufn = ', niaufn |
---|
| 171 | WRITE(numout,*) ' Logical switch for ensuring that the sa > salfixmin ln_salfix = ', ln_salfix |
---|
| 172 | WRITE(numout,*) ' Minimum salinity after applying the increments salfixmin = ', salfixmin |
---|
[2128] | 173 | ENDIF |
---|
| 174 | |
---|
| 175 | nitbkg_r = nitbkg + nit000 - 1 ! Background time referenced to nit000 |
---|
| 176 | nitdin_r = nitdin + nit000 - 1 ! Background time for DI referenced to nit000 |
---|
| 177 | nitiaustr_r = nitiaustr + nit000 - 1 ! Start of IAU interval referenced to nit000 |
---|
| 178 | nitiaufin_r = nitiaufin + nit000 - 1 ! End of IAU interval referenced to nit000 |
---|
| 179 | |
---|
| 180 | iiauper = nitiaufin_r - nitiaustr_r + 1 ! IAU interval length |
---|
| 181 | icycper = nitend - nit000 + 1 ! Cycle interval length |
---|
| 182 | |
---|
[4990] | 183 | CALL calc_date( nit000, nitend , ndate0, iitend_date ) ! Date of final time step |
---|
| 184 | CALL calc_date( nit000, nitbkg_r , ndate0, iitbkg_date ) ! Background time for Jb referenced to ndate0 |
---|
| 185 | CALL calc_date( nit000, nitdin_r , ndate0, iitdin_date ) ! Background time for DI referenced to ndate0 |
---|
| 186 | CALL calc_date( nit000, nitiaustr_r, ndate0, iitiaustr_date ) ! IAU start time referenced to ndate0 |
---|
| 187 | CALL calc_date( nit000, nitiaufin_r, ndate0, iitiaufin_date ) ! IAU end time referenced to ndate0 |
---|
| 188 | ! |
---|
[2128] | 189 | IF(lwp) THEN |
---|
| 190 | WRITE(numout,*) |
---|
| 191 | WRITE(numout,*) ' Time steps referenced to current cycle:' |
---|
| 192 | WRITE(numout,*) ' iitrst = ', nit000 - 1 |
---|
| 193 | WRITE(numout,*) ' nit000 = ', nit000 |
---|
| 194 | WRITE(numout,*) ' nitend = ', nitend |
---|
| 195 | WRITE(numout,*) ' nitbkg_r = ', nitbkg_r |
---|
| 196 | WRITE(numout,*) ' nitdin_r = ', nitdin_r |
---|
| 197 | WRITE(numout,*) ' nitiaustr_r = ', nitiaustr_r |
---|
| 198 | WRITE(numout,*) ' nitiaufin_r = ', nitiaufin_r |
---|
| 199 | WRITE(numout,*) |
---|
| 200 | WRITE(numout,*) ' Dates referenced to current cycle:' |
---|
| 201 | WRITE(numout,*) ' ndastp = ', ndastp |
---|
| 202 | WRITE(numout,*) ' ndate0 = ', ndate0 |
---|
| 203 | WRITE(numout,*) ' iitend_date = ', iitend_date |
---|
| 204 | WRITE(numout,*) ' iitbkg_date = ', iitbkg_date |
---|
| 205 | WRITE(numout,*) ' iitdin_date = ', iitdin_date |
---|
| 206 | WRITE(numout,*) ' iitiaustr_date = ', iitiaustr_date |
---|
| 207 | WRITE(numout,*) ' iitiaufin_date = ', iitiaufin_date |
---|
| 208 | ENDIF |
---|
| 209 | |
---|
| 210 | IF ( nacc /= 0 ) & |
---|
| 211 | & CALL ctl_stop( ' nacc /= 0 and key_asminc :', & |
---|
| 212 | & ' Assimilation increments have only been implemented', & |
---|
| 213 | & ' for synchronous time stepping' ) |
---|
| 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 | |
---|
| 258 | IF ( ln_asmiau ) THEN |
---|
| 259 | |
---|
| 260 | ALLOCATE( wgtiau( icycper ) ) |
---|
| 261 | |
---|
| 262 | wgtiau(:) = 0.0 |
---|
| 263 | |
---|
| 264 | IF ( niaufn == 0 ) THEN |
---|
| 265 | |
---|
| 266 | !--------------------------------------------------------- |
---|
| 267 | ! Constant IAU forcing |
---|
| 268 | !--------------------------------------------------------- |
---|
| 269 | |
---|
| 270 | DO jt = 1, iiauper |
---|
| 271 | wgtiau(jt+nitiaustr-1) = 1.0 / REAL( iiauper ) |
---|
| 272 | END DO |
---|
| 273 | |
---|
| 274 | ELSEIF ( niaufn == 1 ) THEN |
---|
| 275 | |
---|
| 276 | !--------------------------------------------------------- |
---|
| 277 | ! Linear hat-like, centred in middle of IAU interval |
---|
| 278 | !--------------------------------------------------------- |
---|
| 279 | |
---|
| 280 | ! Compute the normalization factor |
---|
| 281 | znorm = 0.0 |
---|
| 282 | IF ( MOD( iiauper, 2 ) == 0 ) THEN ! Even number of time steps in IAU interval |
---|
| 283 | imid = iiauper / 2 |
---|
| 284 | DO jt = 1, imid |
---|
| 285 | znorm = znorm + REAL( jt ) |
---|
| 286 | END DO |
---|
| 287 | znorm = 2.0 * znorm |
---|
| 288 | ELSE ! Odd number of time steps in IAU interval |
---|
| 289 | imid = ( iiauper + 1 ) / 2 |
---|
| 290 | DO jt = 1, imid - 1 |
---|
| 291 | znorm = znorm + REAL( jt ) |
---|
| 292 | END DO |
---|
| 293 | znorm = 2.0 * znorm + REAL( imid ) |
---|
| 294 | ENDIF |
---|
| 295 | znorm = 1.0 / znorm |
---|
| 296 | |
---|
| 297 | DO jt = 1, imid - 1 |
---|
| 298 | wgtiau(jt+nitiaustr-1) = REAL( jt ) * znorm |
---|
| 299 | END DO |
---|
| 300 | DO jt = imid, iiauper |
---|
| 301 | wgtiau(jt+nitiaustr-1) = REAL( iiauper - jt + 1 ) * znorm |
---|
| 302 | END DO |
---|
| 303 | |
---|
| 304 | ENDIF |
---|
| 305 | |
---|
| 306 | ! Test that the integral of the weights over the weighting interval equals 1 |
---|
| 307 | IF(lwp) THEN |
---|
| 308 | WRITE(numout,*) |
---|
| 309 | WRITE(numout,*) 'asm_inc_init : IAU weights' |
---|
| 310 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
| 311 | WRITE(numout,*) ' time step IAU weight' |
---|
| 312 | WRITE(numout,*) ' ========= =====================' |
---|
| 313 | ztotwgt = 0.0 |
---|
| 314 | DO jt = 1, icycper |
---|
| 315 | ztotwgt = ztotwgt + wgtiau(jt) |
---|
| 316 | WRITE(numout,*) ' ', jt, ' ', wgtiau(jt) |
---|
| 317 | END DO |
---|
| 318 | WRITE(numout,*) ' ===================================' |
---|
| 319 | WRITE(numout,*) ' Time-integrated weight = ', ztotwgt |
---|
| 320 | WRITE(numout,*) ' ===================================' |
---|
| 321 | ENDIF |
---|
| 322 | |
---|
| 323 | ENDIF |
---|
| 324 | |
---|
| 325 | !-------------------------------------------------------------------- |
---|
| 326 | ! Allocate and initialize the increment arrays |
---|
| 327 | !-------------------------------------------------------------------- |
---|
| 328 | |
---|
| 329 | ALLOCATE( t_bkginc(jpi,jpj,jpk) ) |
---|
| 330 | ALLOCATE( s_bkginc(jpi,jpj,jpk) ) |
---|
| 331 | ALLOCATE( u_bkginc(jpi,jpj,jpk) ) |
---|
| 332 | ALLOCATE( v_bkginc(jpi,jpj,jpk) ) |
---|
| 333 | ALLOCATE( ssh_bkginc(jpi,jpj) ) |
---|
[3764] | 334 | ALLOCATE( seaice_bkginc(jpi,jpj)) |
---|
[2128] | 335 | #if defined key_asminc |
---|
| 336 | ALLOCATE( ssh_iau(jpi,jpj) ) |
---|
| 337 | #endif |
---|
| 338 | t_bkginc(:,:,:) = 0.0 |
---|
| 339 | s_bkginc(:,:,:) = 0.0 |
---|
| 340 | u_bkginc(:,:,:) = 0.0 |
---|
| 341 | v_bkginc(:,:,:) = 0.0 |
---|
| 342 | ssh_bkginc(:,:) = 0.0 |
---|
[3764] | 343 | seaice_bkginc(:,:) = 0.0 |
---|
[2128] | 344 | #if defined key_asminc |
---|
| 345 | ssh_iau(:,:) = 0.0 |
---|
| 346 | #endif |
---|
[3764] | 347 | IF ( ( ln_trainc ).OR.( ln_dyninc ).OR.( ln_sshinc ).OR.( ln_seaiceinc ) ) THEN |
---|
[2128] | 348 | |
---|
| 349 | !-------------------------------------------------------------------- |
---|
| 350 | ! Read the increments from file |
---|
| 351 | !-------------------------------------------------------------------- |
---|
| 352 | |
---|
| 353 | CALL iom_open( c_asminc, inum ) |
---|
| 354 | |
---|
| 355 | CALL iom_get( inum, 'time', zdate_inc ) |
---|
| 356 | |
---|
| 357 | CALL iom_get( inum, 'z_inc_dateb', z_inc_dateb ) |
---|
| 358 | CALL iom_get( inum, 'z_inc_datef', z_inc_datef ) |
---|
| 359 | z_inc_dateb = zdate_inc |
---|
| 360 | z_inc_datef = zdate_inc |
---|
| 361 | |
---|
| 362 | IF(lwp) THEN |
---|
| 363 | WRITE(numout,*) |
---|
| 364 | WRITE(numout,*) 'asm_inc_init : Assimilation increments valid ', & |
---|
| 365 | & ' between dates ', NINT( z_inc_dateb ),' and ', & |
---|
| 366 | & NINT( z_inc_datef ) |
---|
| 367 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
| 368 | ENDIF |
---|
| 369 | |
---|
| 370 | IF ( ( NINT( z_inc_dateb ) < ndastp ) & |
---|
| 371 | & .OR.( NINT( z_inc_datef ) > iitend_date ) ) & |
---|
| 372 | & CALL ctl_warn( ' Validity time of assimilation increments is ', & |
---|
| 373 | & ' outside the assimilation interval' ) |
---|
| 374 | |
---|
| 375 | IF ( ( ln_asmdin ).AND.( NINT( zdate_inc ) /= iitdin_date ) ) & |
---|
| 376 | & CALL ctl_warn( ' Validity time of assimilation increments does ', & |
---|
| 377 | & ' not agree with Direct Initialization time' ) |
---|
| 378 | |
---|
| 379 | IF ( ln_trainc ) THEN |
---|
| 380 | CALL iom_get( inum, jpdom_autoglo, 'bckint', t_bkginc, 1 ) |
---|
| 381 | CALL iom_get( inum, jpdom_autoglo, 'bckins', s_bkginc, 1 ) |
---|
| 382 | ! Apply the masks |
---|
| 383 | t_bkginc(:,:,:) = t_bkginc(:,:,:) * tmask(:,:,:) |
---|
| 384 | s_bkginc(:,:,:) = s_bkginc(:,:,:) * tmask(:,:,:) |
---|
| 385 | ! Set missing increments to 0.0 rather than 1e+20 |
---|
| 386 | ! to allow for differences in masks |
---|
| 387 | WHERE( ABS( t_bkginc(:,:,:) ) > 1.0e+10 ) t_bkginc(:,:,:) = 0.0 |
---|
| 388 | WHERE( ABS( s_bkginc(:,:,:) ) > 1.0e+10 ) s_bkginc(:,:,:) = 0.0 |
---|
| 389 | ENDIF |
---|
| 390 | |
---|
| 391 | IF ( ln_dyninc ) THEN |
---|
| 392 | CALL iom_get( inum, jpdom_autoglo, 'bckinu', u_bkginc, 1 ) |
---|
| 393 | CALL iom_get( inum, jpdom_autoglo, 'bckinv', v_bkginc, 1 ) |
---|
| 394 | ! Apply the masks |
---|
| 395 | u_bkginc(:,:,:) = u_bkginc(:,:,:) * umask(:,:,:) |
---|
| 396 | v_bkginc(:,:,:) = v_bkginc(:,:,:) * vmask(:,:,:) |
---|
| 397 | ! Set missing increments to 0.0 rather than 1e+20 |
---|
| 398 | ! to allow for differences in masks |
---|
| 399 | WHERE( ABS( u_bkginc(:,:,:) ) > 1.0e+10 ) u_bkginc(:,:,:) = 0.0 |
---|
| 400 | WHERE( ABS( v_bkginc(:,:,:) ) > 1.0e+10 ) v_bkginc(:,:,:) = 0.0 |
---|
| 401 | ENDIF |
---|
| 402 | |
---|
| 403 | IF ( ln_sshinc ) THEN |
---|
| 404 | CALL iom_get( inum, jpdom_autoglo, 'bckineta', ssh_bkginc, 1 ) |
---|
| 405 | ! Apply the masks |
---|
| 406 | ssh_bkginc(:,:) = ssh_bkginc(:,:) * tmask(:,:,1) |
---|
| 407 | ! Set missing increments to 0.0 rather than 1e+20 |
---|
| 408 | ! to allow for differences in masks |
---|
| 409 | WHERE( ABS( ssh_bkginc(:,:) ) > 1.0e+10 ) ssh_bkginc(:,:) = 0.0 |
---|
| 410 | ENDIF |
---|
| 411 | |
---|
[3764] | 412 | IF ( ln_seaiceinc ) THEN |
---|
| 413 | CALL iom_get( inum, jpdom_autoglo, 'bckinseaice', seaice_bkginc, 1 ) |
---|
| 414 | ! Apply the masks |
---|
| 415 | seaice_bkginc(:,:) = seaice_bkginc(:,:) * tmask(:,:,1) |
---|
| 416 | ! Set missing increments to 0.0 rather than 1e+20 |
---|
| 417 | ! to allow for differences in masks |
---|
| 418 | WHERE( ABS( seaice_bkginc(:,:) ) > 1.0e+10 ) seaice_bkginc(:,:) = 0.0 |
---|
| 419 | ENDIF |
---|
| 420 | |
---|
[2128] | 421 | CALL iom_close( inum ) |
---|
| 422 | |
---|
| 423 | ENDIF |
---|
| 424 | |
---|
| 425 | !----------------------------------------------------------------------- |
---|
[3294] | 426 | ! Apply divergence damping filter |
---|
| 427 | !----------------------------------------------------------------------- |
---|
| 428 | |
---|
| 429 | IF ( ln_dyninc .AND. nn_divdmp > 0 ) THEN |
---|
| 430 | |
---|
[3764] | 431 | CALL wrk_alloc(jpi,jpj,hdiv) |
---|
[3294] | 432 | |
---|
[3764] | 433 | DO jt = 1, nn_divdmp |
---|
[3294] | 434 | |
---|
[3764] | 435 | DO jk = 1, jpkm1 |
---|
[3294] | 436 | |
---|
[3764] | 437 | hdiv(:,:) = 0._wp |
---|
[3294] | 438 | |
---|
[3764] | 439 | DO jj = 2, jpjm1 |
---|
| 440 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
| 441 | hdiv(ji,jj) = & |
---|
| 442 | ( e2u(ji ,jj ) * fse3u(ji ,jj ,jk) * u_bkginc(ji ,jj ,jk) & |
---|
| 443 | - e2u(ji-1,jj ) * fse3u(ji-1,jj ,jk) * u_bkginc(ji-1,jj ,jk) & |
---|
| 444 | + e1v(ji ,jj ) * fse3v(ji ,jj ,jk) * v_bkginc(ji ,jj ,jk) & |
---|
| 445 | - e1v(ji ,jj-1) * fse3v(ji ,jj-1,jk) * v_bkginc(ji ,jj-1,jk) ) & |
---|
| 446 | / ( e1t(ji,jj) * e2t(ji,jj) * fse3t(ji,jj,jk) ) |
---|
| 447 | END DO |
---|
[3294] | 448 | END DO |
---|
| 449 | |
---|
[3764] | 450 | CALL lbc_lnk( hdiv, 'T', 1. ) ! lateral boundary cond. (no sign change) |
---|
[3294] | 451 | |
---|
[3764] | 452 | DO jj = 2, jpjm1 |
---|
| 453 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
| 454 | u_bkginc(ji,jj,jk) = u_bkginc(ji,jj,jk) + 0.2_wp * ( e1t(ji+1,jj)*e2t(ji+1,jj) * hdiv(ji+1,jj) & |
---|
| 455 | - e1t(ji ,jj)*e2t(ji ,jj) * hdiv(ji ,jj) ) & |
---|
| 456 | / e1u(ji,jj) * umask(ji,jj,jk) |
---|
| 457 | v_bkginc(ji,jj,jk) = v_bkginc(ji,jj,jk) + 0.2_wp * ( e1t(ji,jj+1)*e2t(ji,jj+1) * hdiv(ji,jj+1) & |
---|
| 458 | - e1t(ji,jj )*e2t(ji,jj ) * hdiv(ji,jj ) ) & |
---|
| 459 | / e2v(ji,jj) * vmask(ji,jj,jk) |
---|
| 460 | END DO |
---|
[3294] | 461 | END DO |
---|
[3764] | 462 | |
---|
[3294] | 463 | END DO |
---|
| 464 | |
---|
[3764] | 465 | END DO |
---|
[3294] | 466 | |
---|
[3764] | 467 | CALL wrk_dealloc(jpi,jpj,hdiv) |
---|
[3294] | 468 | |
---|
| 469 | ENDIF |
---|
| 470 | |
---|
| 471 | |
---|
| 472 | |
---|
| 473 | !----------------------------------------------------------------------- |
---|
[2128] | 474 | ! Allocate and initialize the background state arrays |
---|
| 475 | !----------------------------------------------------------------------- |
---|
| 476 | |
---|
| 477 | IF ( ln_asmdin ) THEN |
---|
| 478 | |
---|
| 479 | ALLOCATE( t_bkg(jpi,jpj,jpk) ) |
---|
| 480 | ALLOCATE( s_bkg(jpi,jpj,jpk) ) |
---|
| 481 | ALLOCATE( u_bkg(jpi,jpj,jpk) ) |
---|
| 482 | ALLOCATE( v_bkg(jpi,jpj,jpk) ) |
---|
| 483 | ALLOCATE( ssh_bkg(jpi,jpj) ) |
---|
| 484 | |
---|
| 485 | t_bkg(:,:,:) = 0.0 |
---|
| 486 | s_bkg(:,:,:) = 0.0 |
---|
| 487 | u_bkg(:,:,:) = 0.0 |
---|
| 488 | v_bkg(:,:,:) = 0.0 |
---|
| 489 | ssh_bkg(:,:) = 0.0 |
---|
| 490 | |
---|
| 491 | !-------------------------------------------------------------------- |
---|
| 492 | ! Read from file the background state at analysis time |
---|
| 493 | !-------------------------------------------------------------------- |
---|
| 494 | |
---|
| 495 | CALL iom_open( c_asmdin, inum ) |
---|
| 496 | |
---|
[3764] | 497 | CALL iom_get( inum, 'rdastp', zdate_bkg ) |
---|
[2128] | 498 | |
---|
| 499 | IF(lwp) THEN |
---|
| 500 | WRITE(numout,*) |
---|
| 501 | WRITE(numout,*) 'asm_inc_init : Assimilation background state valid at : ', & |
---|
| 502 | & NINT( zdate_bkg ) |
---|
| 503 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
| 504 | ENDIF |
---|
| 505 | |
---|
| 506 | IF ( NINT( zdate_bkg ) /= iitdin_date ) & |
---|
| 507 | & CALL ctl_warn( ' Validity time of assimilation background state does', & |
---|
| 508 | & ' not agree with Direct Initialization time' ) |
---|
| 509 | |
---|
| 510 | IF ( ln_trainc ) THEN |
---|
| 511 | CALL iom_get( inum, jpdom_autoglo, 'tn', t_bkg ) |
---|
| 512 | CALL iom_get( inum, jpdom_autoglo, 'sn', s_bkg ) |
---|
| 513 | t_bkg(:,:,:) = t_bkg(:,:,:) * tmask(:,:,:) |
---|
| 514 | s_bkg(:,:,:) = s_bkg(:,:,:) * tmask(:,:,:) |
---|
| 515 | ENDIF |
---|
| 516 | |
---|
| 517 | IF ( ln_dyninc ) THEN |
---|
| 518 | CALL iom_get( inum, jpdom_autoglo, 'un', u_bkg ) |
---|
| 519 | CALL iom_get( inum, jpdom_autoglo, 'vn', v_bkg ) |
---|
| 520 | u_bkg(:,:,:) = u_bkg(:,:,:) * umask(:,:,:) |
---|
| 521 | v_bkg(:,:,:) = v_bkg(:,:,:) * vmask(:,:,:) |
---|
| 522 | ENDIF |
---|
| 523 | |
---|
| 524 | IF ( ln_sshinc ) THEN |
---|
| 525 | CALL iom_get( inum, jpdom_autoglo, 'sshn', ssh_bkg ) |
---|
| 526 | ssh_bkg(:,:) = ssh_bkg(:,:) * tmask(:,:,1) |
---|
| 527 | ENDIF |
---|
| 528 | |
---|
| 529 | CALL iom_close( inum ) |
---|
| 530 | |
---|
| 531 | ENDIF |
---|
[2392] | 532 | ! |
---|
[2128] | 533 | END SUBROUTINE asm_inc_init |
---|
| 534 | |
---|
[2392] | 535 | |
---|
[2128] | 536 | SUBROUTINE calc_date( kit000, kt, kdate0, kdate ) |
---|
| 537 | !!---------------------------------------------------------------------- |
---|
| 538 | !! *** ROUTINE calc_date *** |
---|
| 539 | !! |
---|
| 540 | !! ** Purpose : Compute the calendar date YYYYMMDD at a given time step. |
---|
| 541 | !! |
---|
| 542 | !! ** Method : Compute the calendar date YYYYMMDD at a given time step. |
---|
| 543 | !! |
---|
| 544 | !! ** Action : |
---|
| 545 | !!---------------------------------------------------------------------- |
---|
| 546 | INTEGER, INTENT(IN) :: kit000 ! Initial time step |
---|
| 547 | INTEGER, INTENT(IN) :: kt ! Current time step referenced to kit000 |
---|
| 548 | INTEGER, INTENT(IN) :: kdate0 ! Initial date |
---|
| 549 | INTEGER, INTENT(OUT) :: kdate ! Current date reference to kdate0 |
---|
[2392] | 550 | ! |
---|
[2128] | 551 | INTEGER :: iyea0 ! Initial year |
---|
| 552 | INTEGER :: imon0 ! Initial month |
---|
| 553 | INTEGER :: iday0 ! Initial day |
---|
| 554 | INTEGER :: iyea ! Current year |
---|
| 555 | INTEGER :: imon ! Current month |
---|
| 556 | INTEGER :: iday ! Current day |
---|
| 557 | INTEGER :: idaystp ! Number of days between initial and current date |
---|
| 558 | INTEGER :: idaycnt ! Day counter |
---|
| 559 | |
---|
| 560 | INTEGER, DIMENSION(12) :: imonth_len !: length in days of the months of the current year |
---|
| 561 | |
---|
| 562 | !----------------------------------------------------------------------- |
---|
| 563 | ! Compute the calendar date YYYYMMDD |
---|
| 564 | !----------------------------------------------------------------------- |
---|
| 565 | |
---|
| 566 | ! Initial date |
---|
| 567 | iyea0 = kdate0 / 10000 |
---|
| 568 | imon0 = ( kdate0 - ( iyea0 * 10000 ) ) / 100 |
---|
| 569 | iday0 = kdate0 - ( iyea0 * 10000 ) - ( imon0 * 100 ) |
---|
| 570 | |
---|
| 571 | ! Check that kt >= kit000 - 1 |
---|
| 572 | IF ( kt < kit000 - 1 ) CALL ctl_stop( ' kt must be >= kit000 - 1') |
---|
| 573 | |
---|
| 574 | ! If kt = kit000 - 1 then set the date to the restart date |
---|
| 575 | IF ( kt == kit000 - 1 ) THEN |
---|
| 576 | |
---|
| 577 | kdate = ndastp |
---|
| 578 | RETURN |
---|
| 579 | |
---|
| 580 | ENDIF |
---|
| 581 | |
---|
| 582 | ! Compute the number of days from the initial date |
---|
| 583 | idaystp = INT( REAL( kt - kit000 ) * rdt / 86400. ) |
---|
| 584 | |
---|
| 585 | iday = iday0 |
---|
| 586 | imon = imon0 |
---|
| 587 | iyea = iyea0 |
---|
| 588 | idaycnt = 0 |
---|
| 589 | |
---|
| 590 | CALL calc_month_len( iyea, imonth_len ) |
---|
| 591 | |
---|
| 592 | DO WHILE ( idaycnt < idaystp ) |
---|
| 593 | iday = iday + 1 |
---|
| 594 | IF ( iday > imonth_len(imon) ) THEN |
---|
| 595 | iday = 1 |
---|
| 596 | imon = imon + 1 |
---|
| 597 | ENDIF |
---|
| 598 | IF ( imon > 12 ) THEN |
---|
| 599 | imon = 1 |
---|
| 600 | iyea = iyea + 1 |
---|
| 601 | CALL calc_month_len( iyea, imonth_len ) ! update month lengths |
---|
| 602 | ENDIF |
---|
| 603 | idaycnt = idaycnt + 1 |
---|
| 604 | END DO |
---|
[2392] | 605 | ! |
---|
[2128] | 606 | kdate = iyea * 10000 + imon * 100 + iday |
---|
[2392] | 607 | ! |
---|
[2128] | 608 | END SUBROUTINE |
---|
| 609 | |
---|
[2392] | 610 | |
---|
[2128] | 611 | SUBROUTINE calc_month_len( iyear, imonth_len ) |
---|
| 612 | !!---------------------------------------------------------------------- |
---|
| 613 | !! *** ROUTINE calc_month_len *** |
---|
| 614 | !! |
---|
| 615 | !! ** Purpose : Compute the number of days in a months given a year. |
---|
| 616 | !! |
---|
| 617 | !! ** Method : |
---|
| 618 | !!---------------------------------------------------------------------- |
---|
| 619 | INTEGER, DIMENSION(12) :: imonth_len !: length in days of the months of the current year |
---|
| 620 | INTEGER :: iyear !: year |
---|
[2392] | 621 | !!---------------------------------------------------------------------- |
---|
| 622 | ! |
---|
[2128] | 623 | ! length of the month of the current year (from nleapy, read in namelist) |
---|
| 624 | IF ( nleapy < 2 ) THEN |
---|
| 625 | imonth_len(:) = (/ 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 /) |
---|
| 626 | IF ( nleapy == 1 ) THEN ! we are using calendar with leap years |
---|
| 627 | IF ( MOD(iyear, 4) == 0 .AND. ( MOD(iyear, 400) == 0 .OR. MOD(iyear, 100) /= 0 ) ) THEN |
---|
| 628 | imonth_len(2) = 29 |
---|
| 629 | ENDIF |
---|
| 630 | ENDIF |
---|
| 631 | ELSE |
---|
| 632 | imonth_len(:) = nleapy ! all months with nleapy days per year |
---|
| 633 | ENDIF |
---|
[2392] | 634 | ! |
---|
[2128] | 635 | END SUBROUTINE |
---|
| 636 | |
---|
[2392] | 637 | |
---|
[2128] | 638 | SUBROUTINE tra_asm_inc( kt ) |
---|
| 639 | !!---------------------------------------------------------------------- |
---|
| 640 | !! *** ROUTINE tra_asm_inc *** |
---|
| 641 | !! |
---|
| 642 | !! ** Purpose : Apply the tracer (T and S) assimilation increments |
---|
| 643 | !! |
---|
| 644 | !! ** Method : Direct initialization or Incremental Analysis Updating |
---|
| 645 | !! |
---|
| 646 | !! ** Action : |
---|
| 647 | !!---------------------------------------------------------------------- |
---|
| 648 | INTEGER, INTENT(IN) :: kt ! Current time step |
---|
[2392] | 649 | ! |
---|
[2128] | 650 | INTEGER :: ji,jj,jk |
---|
| 651 | INTEGER :: it |
---|
| 652 | REAL(wp) :: zincwgt ! IAU weight for current time step |
---|
[3764] | 653 | REAL (wp), DIMENSION(jpi,jpj,jpk) :: fzptnz ! 3d freezing point values |
---|
[2392] | 654 | !!---------------------------------------------------------------------- |
---|
[2128] | 655 | |
---|
[3764] | 656 | ! freezing point calculation taken from oc_fz_pt (but calculated for all depths) |
---|
| 657 | ! used to prevent the applied increments taking the temperature below the local freezing point |
---|
| 658 | |
---|
[4990] | 659 | DO jk = 1, jpkm1 |
---|
[5541] | 660 | CALL eos_fzp( tsn(:,:,jk,jp_sal), fzptnz(:,:,jk), fsdept(:,:,jk) ) |
---|
[4990] | 661 | END DO |
---|
[3764] | 662 | |
---|
[2128] | 663 | IF ( ln_asmiau ) THEN |
---|
| 664 | |
---|
| 665 | !-------------------------------------------------------------------- |
---|
| 666 | ! Incremental Analysis Updating |
---|
| 667 | !-------------------------------------------------------------------- |
---|
| 668 | |
---|
| 669 | IF ( ( kt >= nitiaustr_r ).AND.( kt <= nitiaufin_r ) ) THEN |
---|
| 670 | |
---|
| 671 | it = kt - nit000 + 1 |
---|
| 672 | zincwgt = wgtiau(it) / rdt ! IAU weight for the current time step |
---|
| 673 | |
---|
| 674 | IF(lwp) THEN |
---|
| 675 | WRITE(numout,*) |
---|
[4990] | 676 | WRITE(numout,*) 'tra_asm_inc : Tracer IAU at time step = ', kt,' with IAU weight = ', wgtiau(it) |
---|
[2128] | 677 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
| 678 | ENDIF |
---|
| 679 | |
---|
| 680 | ! Update the tracer tendencies |
---|
| 681 | DO jk = 1, jpkm1 |
---|
[3764] | 682 | IF (ln_temnofreeze) THEN |
---|
| 683 | ! Do not apply negative increments if the temperature will fall below freezing |
---|
| 684 | WHERE(t_bkginc(:,:,jk) > 0.0_wp .OR. & |
---|
| 685 | & tsn(:,:,jk,jp_tem) + tsa(:,:,jk,jp_tem) + t_bkginc(:,:,jk) * wgtiau(it) > fzptnz(:,:,jk) ) |
---|
| 686 | tsa(:,:,jk,jp_tem) = tsa(:,:,jk,jp_tem) + t_bkginc(:,:,jk) * zincwgt |
---|
| 687 | END WHERE |
---|
| 688 | ELSE |
---|
| 689 | tsa(:,:,jk,jp_tem) = tsa(:,:,jk,jp_tem) + t_bkginc(:,:,jk) * zincwgt |
---|
| 690 | ENDIF |
---|
| 691 | IF (ln_salfix) THEN |
---|
| 692 | ! Do not apply negative increments if the salinity will fall below a specified |
---|
| 693 | ! minimum value salfixmin |
---|
| 694 | WHERE(s_bkginc(:,:,jk) > 0.0_wp .OR. & |
---|
| 695 | & tsn(:,:,jk,jp_sal) + tsa(:,:,jk,jp_sal) + s_bkginc(:,:,jk) * wgtiau(it) > salfixmin ) |
---|
| 696 | tsa(:,:,jk,jp_sal) = tsa(:,:,jk,jp_sal) + s_bkginc(:,:,jk) * zincwgt |
---|
| 697 | END WHERE |
---|
| 698 | ELSE |
---|
| 699 | tsa(:,:,jk,jp_sal) = tsa(:,:,jk,jp_sal) + s_bkginc(:,:,jk) * zincwgt |
---|
| 700 | ENDIF |
---|
[2128] | 701 | END DO |
---|
| 702 | |
---|
| 703 | ENDIF |
---|
| 704 | |
---|
| 705 | IF ( kt == nitiaufin_r + 1 ) THEN ! For bias crcn to work |
---|
| 706 | DEALLOCATE( t_bkginc ) |
---|
| 707 | DEALLOCATE( s_bkginc ) |
---|
| 708 | ENDIF |
---|
| 709 | |
---|
| 710 | |
---|
| 711 | ELSEIF ( ln_asmdin ) THEN |
---|
| 712 | |
---|
| 713 | !-------------------------------------------------------------------- |
---|
| 714 | ! Direct Initialization |
---|
| 715 | !-------------------------------------------------------------------- |
---|
| 716 | |
---|
| 717 | IF ( kt == nitdin_r ) THEN |
---|
| 718 | |
---|
| 719 | neuler = 0 ! Force Euler forward step |
---|
| 720 | |
---|
| 721 | ! Initialize the now fields with the background + increment |
---|
[3764] | 722 | IF (ln_temnofreeze) THEN |
---|
| 723 | ! Do not apply negative increments if the temperature will fall below freezing |
---|
[4990] | 724 | WHERE( t_bkginc(:,:,:) > 0.0_wp .OR. tsn(:,:,:,jp_tem) + t_bkginc(:,:,:) > fzptnz(:,:,:) ) |
---|
[3764] | 725 | tsn(:,:,:,jp_tem) = t_bkg(:,:,:) + t_bkginc(:,:,:) |
---|
| 726 | END WHERE |
---|
| 727 | ELSE |
---|
| 728 | tsn(:,:,:,jp_tem) = t_bkg(:,:,:) + t_bkginc(:,:,:) |
---|
| 729 | ENDIF |
---|
[2128] | 730 | IF (ln_salfix) THEN |
---|
[3764] | 731 | ! Do not apply negative increments if the salinity will fall below a specified |
---|
| 732 | ! minimum value salfixmin |
---|
[4990] | 733 | WHERE( s_bkginc(:,:,:) > 0.0_wp .OR. tsn(:,:,:,jp_sal) + s_bkginc(:,:,:) > salfixmin ) |
---|
[3764] | 734 | tsn(:,:,:,jp_sal) = s_bkg(:,:,:) + s_bkginc(:,:,:) |
---|
| 735 | END WHERE |
---|
| 736 | ELSE |
---|
| 737 | tsn(:,:,:,jp_sal) = s_bkg(:,:,:) + s_bkginc(:,:,:) |
---|
[2128] | 738 | ENDIF |
---|
| 739 | |
---|
[4990] | 740 | tsb(:,:,:,:) = tsn(:,:,:,:) ! Update before fields |
---|
[2128] | 741 | |
---|
[4990] | 742 | CALL eos( tsb, rhd, rhop, gdept_0(:,:,:) ) ! Before potential and in situ densities |
---|
| 743 | !!gm fabien |
---|
| 744 | ! CALL eos( tsb, rhd, rhop ) ! Before potential and in situ densities |
---|
| 745 | !!gm |
---|
| 746 | |
---|
| 747 | |
---|
[5120] | 748 | IF( ln_zps .AND. .NOT. lk_c1d .AND. .NOT. ln_isfcav) & |
---|
| 749 | & CALL zps_hde ( kt, jpts, tsb, gtsu, gtsv, & ! Partial steps: before horizontal gradient |
---|
| 750 | & rhd, gru , grv ) ! of t, s, rd at the last ocean level |
---|
| 751 | IF( ln_zps .AND. .NOT. lk_c1d .AND. ln_isfcav) & |
---|
| 752 | & CALL zps_hde_isf( nit000, jpts, tsb, gtsu, gtsv, & ! Partial steps for top cell (ISF) |
---|
| 753 | & rhd, gru , grv , aru , arv , gzu , gzv , ge3ru , ge3rv , & |
---|
| 754 | & gtui, gtvi, grui, grvi, arui, arvi, gzui, gzvi, ge3rui, ge3rvi ) ! of t, s, rd at the last ocean level |
---|
[2128] | 755 | |
---|
[3764] | 756 | #if defined key_zdfkpp |
---|
[4313] | 757 | CALL eos( tsn, rhd, fsdept_n(:,:,:) ) ! Compute rhd |
---|
[4990] | 758 | !!gm fabien CALL eos( tsn, rhd ) ! Compute rhd |
---|
[3764] | 759 | #endif |
---|
| 760 | |
---|
[2128] | 761 | DEALLOCATE( t_bkginc ) |
---|
| 762 | DEALLOCATE( s_bkginc ) |
---|
| 763 | DEALLOCATE( t_bkg ) |
---|
| 764 | DEALLOCATE( s_bkg ) |
---|
| 765 | ENDIF |
---|
[2392] | 766 | ! |
---|
[2128] | 767 | ENDIF |
---|
[3764] | 768 | ! Perhaps the following call should be in step |
---|
| 769 | IF ( ln_seaiceinc ) CALL seaice_asm_inc ( kt ) ! apply sea ice concentration increment |
---|
[2392] | 770 | ! |
---|
[2128] | 771 | END SUBROUTINE tra_asm_inc |
---|
| 772 | |
---|
[2392] | 773 | |
---|
[2128] | 774 | SUBROUTINE dyn_asm_inc( kt ) |
---|
| 775 | !!---------------------------------------------------------------------- |
---|
| 776 | !! *** ROUTINE dyn_asm_inc *** |
---|
| 777 | !! |
---|
| 778 | !! ** Purpose : Apply the dynamics (u and v) assimilation increments. |
---|
| 779 | !! |
---|
| 780 | !! ** Method : Direct initialization or Incremental Analysis Updating. |
---|
| 781 | !! |
---|
| 782 | !! ** Action : |
---|
| 783 | !!---------------------------------------------------------------------- |
---|
| 784 | INTEGER, INTENT(IN) :: kt ! Current time step |
---|
[2392] | 785 | ! |
---|
[2128] | 786 | INTEGER :: jk |
---|
| 787 | INTEGER :: it |
---|
| 788 | REAL(wp) :: zincwgt ! IAU weight for current time step |
---|
[2392] | 789 | !!---------------------------------------------------------------------- |
---|
[2128] | 790 | |
---|
| 791 | IF ( ln_asmiau ) THEN |
---|
| 792 | |
---|
| 793 | !-------------------------------------------------------------------- |
---|
| 794 | ! Incremental Analysis Updating |
---|
| 795 | !-------------------------------------------------------------------- |
---|
| 796 | |
---|
| 797 | IF ( ( kt >= nitiaustr_r ).AND.( kt <= nitiaufin_r ) ) THEN |
---|
| 798 | |
---|
| 799 | it = kt - nit000 + 1 |
---|
| 800 | zincwgt = wgtiau(it) / rdt ! IAU weight for the current time step |
---|
| 801 | |
---|
| 802 | IF(lwp) THEN |
---|
| 803 | WRITE(numout,*) |
---|
| 804 | WRITE(numout,*) 'dyn_asm_inc : Dynamics IAU at time step = ', & |
---|
| 805 | & kt,' with IAU weight = ', wgtiau(it) |
---|
| 806 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
| 807 | ENDIF |
---|
| 808 | |
---|
| 809 | ! Update the dynamic tendencies |
---|
| 810 | DO jk = 1, jpkm1 |
---|
| 811 | ua(:,:,jk) = ua(:,:,jk) + u_bkginc(:,:,jk) * zincwgt |
---|
| 812 | va(:,:,jk) = va(:,:,jk) + v_bkginc(:,:,jk) * zincwgt |
---|
| 813 | END DO |
---|
| 814 | |
---|
| 815 | IF ( kt == nitiaufin_r ) THEN |
---|
| 816 | DEALLOCATE( u_bkginc ) |
---|
| 817 | DEALLOCATE( v_bkginc ) |
---|
| 818 | ENDIF |
---|
| 819 | |
---|
| 820 | ENDIF |
---|
| 821 | |
---|
| 822 | ELSEIF ( ln_asmdin ) THEN |
---|
| 823 | |
---|
| 824 | !-------------------------------------------------------------------- |
---|
| 825 | ! Direct Initialization |
---|
| 826 | !-------------------------------------------------------------------- |
---|
| 827 | |
---|
| 828 | IF ( kt == nitdin_r ) THEN |
---|
| 829 | |
---|
| 830 | neuler = 0 ! Force Euler forward step |
---|
| 831 | |
---|
| 832 | ! Initialize the now fields with the background + increment |
---|
| 833 | un(:,:,:) = u_bkg(:,:,:) + u_bkginc(:,:,:) |
---|
| 834 | vn(:,:,:) = v_bkg(:,:,:) + v_bkginc(:,:,:) |
---|
| 835 | |
---|
| 836 | ub(:,:,:) = un(:,:,:) ! Update before fields |
---|
| 837 | vb(:,:,:) = vn(:,:,:) |
---|
| 838 | |
---|
| 839 | DEALLOCATE( u_bkg ) |
---|
| 840 | DEALLOCATE( v_bkg ) |
---|
| 841 | DEALLOCATE( u_bkginc ) |
---|
| 842 | DEALLOCATE( v_bkginc ) |
---|
| 843 | ENDIF |
---|
[2392] | 844 | ! |
---|
[2128] | 845 | ENDIF |
---|
[2392] | 846 | ! |
---|
[2128] | 847 | END SUBROUTINE dyn_asm_inc |
---|
| 848 | |
---|
[2392] | 849 | |
---|
[2128] | 850 | SUBROUTINE ssh_asm_inc( kt ) |
---|
| 851 | !!---------------------------------------------------------------------- |
---|
| 852 | !! *** ROUTINE ssh_asm_inc *** |
---|
| 853 | !! |
---|
| 854 | !! ** Purpose : Apply the sea surface height assimilation increment. |
---|
| 855 | !! |
---|
| 856 | !! ** Method : Direct initialization or Incremental Analysis Updating. |
---|
| 857 | !! |
---|
| 858 | !! ** Action : |
---|
| 859 | !!---------------------------------------------------------------------- |
---|
| 860 | INTEGER, INTENT(IN) :: kt ! Current time step |
---|
[2392] | 861 | ! |
---|
[2128] | 862 | INTEGER :: it |
---|
[3764] | 863 | INTEGER :: jk |
---|
[2128] | 864 | REAL(wp) :: zincwgt ! IAU weight for current time step |
---|
[2392] | 865 | !!---------------------------------------------------------------------- |
---|
[2128] | 866 | |
---|
| 867 | IF ( ln_asmiau ) THEN |
---|
| 868 | |
---|
| 869 | !-------------------------------------------------------------------- |
---|
| 870 | ! Incremental Analysis Updating |
---|
| 871 | !-------------------------------------------------------------------- |
---|
| 872 | |
---|
| 873 | IF ( ( kt >= nitiaustr_r ).AND.( kt <= nitiaufin_r ) ) THEN |
---|
| 874 | |
---|
| 875 | it = kt - nit000 + 1 |
---|
| 876 | zincwgt = wgtiau(it) / rdt ! IAU weight for the current time step |
---|
| 877 | |
---|
| 878 | IF(lwp) THEN |
---|
| 879 | WRITE(numout,*) |
---|
| 880 | WRITE(numout,*) 'ssh_asm_inc : SSH IAU at time step = ', & |
---|
| 881 | & kt,' with IAU weight = ', wgtiau(it) |
---|
| 882 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
| 883 | ENDIF |
---|
| 884 | |
---|
| 885 | ! Save the tendency associated with the IAU weighted SSH increment |
---|
| 886 | ! (applied in dynspg.*) |
---|
| 887 | #if defined key_asminc |
---|
| 888 | ssh_iau(:,:) = ssh_bkginc(:,:) * zincwgt |
---|
| 889 | #endif |
---|
| 890 | IF ( kt == nitiaufin_r ) THEN |
---|
| 891 | DEALLOCATE( ssh_bkginc ) |
---|
| 892 | ENDIF |
---|
| 893 | |
---|
| 894 | ENDIF |
---|
| 895 | |
---|
| 896 | ELSEIF ( ln_asmdin ) THEN |
---|
| 897 | |
---|
| 898 | !-------------------------------------------------------------------- |
---|
| 899 | ! Direct Initialization |
---|
| 900 | !-------------------------------------------------------------------- |
---|
| 901 | |
---|
| 902 | IF ( kt == nitdin_r ) THEN |
---|
| 903 | |
---|
| 904 | neuler = 0 ! Force Euler forward step |
---|
| 905 | |
---|
| 906 | ! Initialize the now fields the background + increment |
---|
| 907 | sshn(:,:) = ssh_bkg(:,:) + ssh_bkginc(:,:) |
---|
| 908 | |
---|
[3764] | 909 | ! Update before fields |
---|
| 910 | sshb(:,:) = sshn(:,:) |
---|
[2128] | 911 | |
---|
[3764] | 912 | IF( lk_vvl ) THEN |
---|
| 913 | DO jk = 1, jpk |
---|
| 914 | fse3t_b(:,:,jk) = fse3t_n(:,:,jk) |
---|
| 915 | END DO |
---|
| 916 | ENDIF |
---|
| 917 | |
---|
[2128] | 918 | DEALLOCATE( ssh_bkg ) |
---|
| 919 | DEALLOCATE( ssh_bkginc ) |
---|
| 920 | |
---|
| 921 | ENDIF |
---|
[2392] | 922 | ! |
---|
[2128] | 923 | ENDIF |
---|
[2392] | 924 | ! |
---|
[2128] | 925 | END SUBROUTINE ssh_asm_inc |
---|
| 926 | |
---|
[3785] | 927 | |
---|
[3764] | 928 | SUBROUTINE seaice_asm_inc( kt, kindic ) |
---|
| 929 | !!---------------------------------------------------------------------- |
---|
| 930 | !! *** ROUTINE seaice_asm_inc *** |
---|
| 931 | !! |
---|
| 932 | !! ** Purpose : Apply the sea ice assimilation increment. |
---|
| 933 | !! |
---|
| 934 | !! ** Method : Direct initialization or Incremental Analysis Updating. |
---|
| 935 | !! |
---|
| 936 | !! ** Action : |
---|
| 937 | !! |
---|
| 938 | !!---------------------------------------------------------------------- |
---|
| 939 | IMPLICIT NONE |
---|
[3785] | 940 | ! |
---|
| 941 | INTEGER, INTENT(in) :: kt ! Current time step |
---|
| 942 | INTEGER, INTENT(in), OPTIONAL :: kindic ! flag for disabling the deallocation |
---|
| 943 | ! |
---|
| 944 | INTEGER :: it |
---|
| 945 | REAL(wp) :: zincwgt ! IAU weight for current time step |
---|
| 946 | #if defined key_lim2 |
---|
| 947 | REAL(wp), DIMENSION(jpi,jpj) :: zofrld, zohicif, zseaicendg, zhicifinc ! LIM |
---|
| 948 | REAL(wp) :: zhicifmin = 0.5_wp ! ice minimum depth in metres |
---|
[3764] | 949 | #endif |
---|
[3785] | 950 | !!---------------------------------------------------------------------- |
---|
[3764] | 951 | |
---|
| 952 | IF ( ln_asmiau ) THEN |
---|
| 953 | |
---|
| 954 | !-------------------------------------------------------------------- |
---|
| 955 | ! Incremental Analysis Updating |
---|
| 956 | !-------------------------------------------------------------------- |
---|
| 957 | |
---|
| 958 | IF ( ( kt >= nitiaustr_r ).AND.( kt <= nitiaufin_r ) ) THEN |
---|
| 959 | |
---|
| 960 | it = kt - nit000 + 1 |
---|
| 961 | zincwgt = wgtiau(it) ! IAU weight for the current time step |
---|
| 962 | ! note this is not a tendency so should not be divided by rdt (as with the tracer and other increments) |
---|
| 963 | |
---|
| 964 | IF(lwp) THEN |
---|
| 965 | WRITE(numout,*) |
---|
| 966 | WRITE(numout,*) 'seaice_asm_inc : sea ice conc IAU at time step = ', & |
---|
| 967 | & kt,' with IAU weight = ', wgtiau(it) |
---|
| 968 | WRITE(numout,*) '~~~~~~~~~~~~' |
---|
| 969 | ENDIF |
---|
| 970 | |
---|
[3785] | 971 | ! Sea-ice : LIM-3 case (to add) |
---|
[3764] | 972 | |
---|
[3785] | 973 | #if defined key_lim2 |
---|
| 974 | ! Sea-ice : LIM-2 case |
---|
| 975 | zofrld (:,:) = frld(:,:) |
---|
| 976 | zohicif(:,:) = hicif(:,:) |
---|
| 977 | ! |
---|
| 978 | frld = MIN( MAX( frld (:,:) - seaice_bkginc(:,:) * zincwgt, 0.0_wp), 1.0_wp) |
---|
[3764] | 979 | pfrld = MIN( MAX( pfrld(:,:) - seaice_bkginc(:,:) * zincwgt, 0.0_wp), 1.0_wp) |
---|
| 980 | fr_i(:,:) = 1.0_wp - frld(:,:) ! adjust ice fraction |
---|
[3785] | 981 | ! |
---|
| 982 | zseaicendg(:,:) = zofrld(:,:) - frld(:,:) ! find out actual sea ice nudge applied |
---|
| 983 | ! |
---|
[3764] | 984 | ! Nudge sea ice depth to bring it up to a required minimum depth |
---|
| 985 | WHERE( zseaicendg(:,:) > 0.0_wp .AND. hicif(:,:) < zhicifmin ) |
---|
| 986 | zhicifinc(:,:) = (zhicifmin - hicif(:,:)) * zincwgt |
---|
| 987 | ELSEWHERE |
---|
| 988 | zhicifinc(:,:) = 0.0_wp |
---|
| 989 | END WHERE |
---|
[3785] | 990 | ! |
---|
| 991 | ! nudge ice depth |
---|
| 992 | hicif (:,:) = hicif (:,:) + zhicifinc(:,:) |
---|
| 993 | phicif(:,:) = phicif(:,:) + zhicifinc(:,:) |
---|
| 994 | ! |
---|
| 995 | ! seaice salinity balancing (to add) |
---|
[3764] | 996 | #endif |
---|
| 997 | |
---|
[4245] | 998 | #if defined key_cice && defined key_asminc |
---|
[3785] | 999 | ! Sea-ice : CICE case. Pass ice increment tendency into CICE |
---|
[3764] | 1000 | ndaice_da(:,:) = seaice_bkginc(:,:) * zincwgt / rdt |
---|
| 1001 | #endif |
---|
| 1002 | |
---|
| 1003 | IF ( kt == nitiaufin_r ) THEN |
---|
| 1004 | DEALLOCATE( seaice_bkginc ) |
---|
| 1005 | ENDIF |
---|
| 1006 | |
---|
| 1007 | ELSE |
---|
| 1008 | |
---|
[4245] | 1009 | #if defined key_cice && defined key_asminc |
---|
[3785] | 1010 | ! Sea-ice : CICE case. Zero ice increment tendency into CICE |
---|
[3764] | 1011 | ndaice_da(:,:) = 0.0_wp |
---|
| 1012 | #endif |
---|
| 1013 | |
---|
| 1014 | ENDIF |
---|
| 1015 | |
---|
| 1016 | ELSEIF ( ln_asmdin ) THEN |
---|
| 1017 | |
---|
| 1018 | !-------------------------------------------------------------------- |
---|
| 1019 | ! Direct Initialization |
---|
| 1020 | !-------------------------------------------------------------------- |
---|
| 1021 | |
---|
| 1022 | IF ( kt == nitdin_r ) THEN |
---|
| 1023 | |
---|
| 1024 | neuler = 0 ! Force Euler forward step |
---|
| 1025 | |
---|
[3785] | 1026 | ! Sea-ice : LIM-3 case (to add) |
---|
[3764] | 1027 | |
---|
[3785] | 1028 | #if defined key_lim2 |
---|
| 1029 | ! Sea-ice : LIM-2 case. |
---|
[3764] | 1030 | zofrld(:,:)=frld(:,:) |
---|
| 1031 | zohicif(:,:)=hicif(:,:) |
---|
[3785] | 1032 | ! |
---|
[3764] | 1033 | ! Initialize the now fields the background + increment |
---|
[3785] | 1034 | frld (:,:) = MIN( MAX( frld(:,:) - seaice_bkginc(:,:), 0.0_wp), 1.0_wp) |
---|
[3764] | 1035 | pfrld(:,:) = frld(:,:) |
---|
[3785] | 1036 | fr_i (:,:) = 1.0_wp - frld(:,:) ! adjust ice fraction |
---|
| 1037 | zseaicendg(:,:) = zofrld(:,:) - frld(:,:) ! find out actual sea ice nudge applied |
---|
| 1038 | ! |
---|
[3764] | 1039 | ! Nudge sea ice depth to bring it up to a required minimum depth |
---|
| 1040 | WHERE( zseaicendg(:,:) > 0.0_wp .AND. hicif(:,:) < zhicifmin ) |
---|
| 1041 | zhicifinc(:,:) = (zhicifmin - hicif(:,:)) * zincwgt |
---|
| 1042 | ELSEWHERE |
---|
| 1043 | zhicifinc(:,:) = 0.0_wp |
---|
| 1044 | END WHERE |
---|
[3785] | 1045 | ! |
---|
| 1046 | ! nudge ice depth |
---|
| 1047 | hicif (:,:) = hicif (:,:) + zhicifinc(:,:) |
---|
| 1048 | phicif(:,:) = phicif(:,:) |
---|
| 1049 | ! |
---|
| 1050 | ! seaice salinity balancing (to add) |
---|
[3764] | 1051 | #endif |
---|
| 1052 | |
---|
[4245] | 1053 | #if defined key_cice && defined key_asminc |
---|
| 1054 | ! Sea-ice : CICE case. Pass ice increment tendency into CICE |
---|
[3764] | 1055 | ndaice_da(:,:) = seaice_bkginc(:,:) / rdt |
---|
| 1056 | #endif |
---|
| 1057 | IF ( .NOT. PRESENT(kindic) ) THEN |
---|
| 1058 | DEALLOCATE( seaice_bkginc ) |
---|
| 1059 | END IF |
---|
| 1060 | |
---|
| 1061 | ELSE |
---|
| 1062 | |
---|
[4245] | 1063 | #if defined key_cice && defined key_asminc |
---|
[3785] | 1064 | ! Sea-ice : CICE case. Zero ice increment tendency into CICE |
---|
[3764] | 1065 | ndaice_da(:,:) = 0.0_wp |
---|
| 1066 | #endif |
---|
| 1067 | |
---|
| 1068 | ENDIF |
---|
| 1069 | |
---|
[3785] | 1070 | !#if defined defined key_lim2 || defined key_cice |
---|
[3764] | 1071 | ! |
---|
| 1072 | ! IF (ln_seaicebal ) THEN |
---|
| 1073 | ! !! balancing salinity increments |
---|
| 1074 | ! !! simple case from limflx.F90 (doesn't include a mass flux) |
---|
| 1075 | ! !! assumption is that as ice concentration is reduced or increased |
---|
| 1076 | ! !! the snow and ice depths remain constant |
---|
| 1077 | ! !! note that snow is being created where ice concentration is being increased |
---|
| 1078 | ! !! - could be more sophisticated and |
---|
| 1079 | ! !! not do this (but would need to alter h_snow) |
---|
| 1080 | ! |
---|
| 1081 | ! usave(:,:,:)=sb(:,:,:) ! use array as a temporary store |
---|
| 1082 | ! |
---|
| 1083 | ! DO jj = 1, jpj |
---|
| 1084 | ! DO ji = 1, jpi |
---|
| 1085 | ! ! calculate change in ice and snow mass per unit area |
---|
| 1086 | ! ! positive values imply adding salt to the ocean (results from ice formation) |
---|
| 1087 | ! ! fwf : ice formation and melting |
---|
| 1088 | ! |
---|
| 1089 | ! zfons = ( -nfresh_da(ji,jj)*soce + nfsalt_da(ji,jj) )*rdt |
---|
| 1090 | ! |
---|
| 1091 | ! ! change salinity down to mixed layer depth |
---|
| 1092 | ! mld=hmld_kara(ji,jj) |
---|
| 1093 | ! |
---|
| 1094 | ! ! prevent small mld |
---|
| 1095 | ! ! less than 10m can cause salinity instability |
---|
| 1096 | ! IF (mld < 10) mld=10 |
---|
| 1097 | ! |
---|
| 1098 | ! ! set to bottom of a level |
---|
| 1099 | ! DO jk = jpk-1, 2, -1 |
---|
| 1100 | ! IF ((mld > gdepw(ji,jj,jk)) .and. (mld < gdepw(ji,jj,jk+1))) THEN |
---|
| 1101 | ! mld=gdepw(ji,jj,jk+1) |
---|
| 1102 | ! jkmax=jk |
---|
| 1103 | ! ENDIF |
---|
| 1104 | ! ENDDO |
---|
| 1105 | ! |
---|
| 1106 | ! ! avoid applying salinity balancing in shallow water or on land |
---|
| 1107 | ! ! |
---|
| 1108 | ! |
---|
| 1109 | ! ! dsal_ocn (psu kg m^-2) / (kg m^-3 * m) |
---|
| 1110 | ! |
---|
| 1111 | ! dsal_ocn=0.0_wp |
---|
| 1112 | ! sal_thresh=5.0_wp ! minimum salinity threshold for salinity balancing |
---|
| 1113 | ! |
---|
| 1114 | ! if (tmask(ji,jj,1) > 0 .AND. tmask(ji,jj,jkmax) > 0 ) & |
---|
| 1115 | ! dsal_ocn = zfons / (rhop(ji,jj,1) * mld) |
---|
| 1116 | ! |
---|
| 1117 | ! ! put increments in for levels in the mixed layer |
---|
| 1118 | ! ! but prevent salinity below a threshold value |
---|
| 1119 | ! |
---|
| 1120 | ! DO jk = 1, jkmax |
---|
| 1121 | ! |
---|
| 1122 | ! IF (dsal_ocn > 0.0_wp .or. sb(ji,jj,jk)+dsal_ocn > sal_thresh) THEN |
---|
| 1123 | ! sb(ji,jj,jk) = sb(ji,jj,jk) + dsal_ocn |
---|
| 1124 | ! sn(ji,jj,jk) = sn(ji,jj,jk) + dsal_ocn |
---|
| 1125 | ! ENDIF |
---|
| 1126 | ! |
---|
| 1127 | ! ENDDO |
---|
| 1128 | ! |
---|
| 1129 | ! ! ! salt exchanges at the ice/ocean interface |
---|
| 1130 | ! ! zpmess = zfons / rdt_ice ! rdt_ice is ice timestep |
---|
| 1131 | ! ! |
---|
| 1132 | ! !! Adjust fsalt. A +ve fsalt means adding salt to ocean |
---|
| 1133 | ! !! fsalt(ji,jj) = fsalt(ji,jj) + zpmess ! adjust fsalt |
---|
| 1134 | ! !! |
---|
| 1135 | ! !! emps(ji,jj) = emps(ji,jj) + zpmess ! or adjust emps (see icestp1d) |
---|
| 1136 | ! !! ! E-P (kg m-2 s-2) |
---|
| 1137 | ! ! emp(ji,jj) = emp(ji,jj) + zpmess ! E-P (kg m-2 s-2) |
---|
| 1138 | ! ENDDO !ji |
---|
| 1139 | ! ENDDO !jj! |
---|
| 1140 | ! |
---|
| 1141 | ! ENDIF !ln_seaicebal |
---|
| 1142 | ! |
---|
| 1143 | !#endif |
---|
| 1144 | |
---|
| 1145 | ENDIF |
---|
| 1146 | |
---|
| 1147 | END SUBROUTINE seaice_asm_inc |
---|
[3785] | 1148 | |
---|
[2392] | 1149 | !!====================================================================== |
---|
[2128] | 1150 | END MODULE asminc |
---|