Changeset 6443
- Timestamp:
- 2016-04-07T17:24:48+02:00 (8 years ago)
- Location:
- branches/UKMO/dev_r5518_GC3p0_package/NEMOGCM
- Files:
-
- 3 edited
-
CONFIG/SHARED/field_def.xml (modified) (1 diff)
-
CONFIG/SHARED/namelist_ref (modified) (2 diffs)
-
NEMO/OPA_SRC/ZDF/zdfmxl.F90 (modified) (5 diffs)
Legend:
- Unmodified
- Added
- Removed
-
branches/UKMO/dev_r5518_GC3p0_package/NEMOGCM/CONFIG/SHARED/field_def.xml
r6442 r6443 54 54 <field id="mldr10_1max" long_name="Max of Mixed Layer Depth (dsigma = 0.01 wrt 10m)" field_ref="mldr10_1" operation="maximum" /> 55 55 <field id="mldr10_1min" long_name="Min of Mixed Layer Depth (dsigma = 0.01 wrt 10m)" field_ref="mldr10_1" operation="minimum" /> 56 <field id="mldzint" long_name="vertically-interpolated mixing layer depth" unit="m" /> 56 57 <field id="heatc" long_name="Heat content vertically integrated" standard_name="integral_of_sea_water_potential_temperature_wrt_depth_expressed_as_heat_content" unit="J/m2" /> 57 58 <field id="saltc" long_name="Salt content vertically integrated" unit="1e-3*kg/m2" /> -
branches/UKMO/dev_r5518_GC3p0_package/NEMOGCM/CONFIG/SHARED/namelist_ref
r6440 r6443 885 885 !! namzdf_tmx tidal mixing parameterization ("key_zdftmx") 886 886 !! namzdf_tmx_new new tidal mixing parameterization ("key_zdftmx_new") 887 !! namzdf_mldzint vertically-interpolated mixed-layer depth parameters 887 888 !!====================================================================== 888 889 ! … … 998 999 ln_tsdiff = .true. ! account for differential T/S mixing (T) or not (F) 999 1000 / 1001 !------------------------------------------------------------------------------------------ 1002 &namzdf_mldzint ! Parameters for vertically-interpolated mixed-layer depth diagnostic 1003 !------------------------------------------------------------------------------------------ 1004 nn_mld_type = 1 ! mixed layer type 1005 rn_zref = 10.0 ! depth of initial reference temperature 1006 rn_dT_crit = 0.2 ! critical temperature difference 1007 rn_iso_frac = 0.1 ! fraction of critical temperature difference used 1008 / 1009 1000 1010 !!====================================================================== 1001 1011 !! *** Miscellaneous namelists *** -
branches/UKMO/dev_r5518_GC3p0_package/NEMOGCM/NEMO/OPA_SRC/ZDF/zdfmxl.F90
r6440 r6443 18 18 USE phycst ! physical constants 19 19 USE iom ! I/O library 20 USE eosbn2 ! for zdf_mxl_zint 20 21 USE lib_mpp ! MPP library 21 22 USE wrk_nemo ! work arrays … … 33 34 REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: hmlp !: mixed layer depth (rho=rho0+zdcrit) [m] 34 35 REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: hmlpt !: mixed layer depth at t-points [m] 36 REAL(wp), PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: hmld_zint !: vertically-interpolated mixed layer depth [m] 37 LOGICAL, PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:) :: ll_found ! Is T_b to be found by interpolation ? 38 LOGICAL, PUBLIC, ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: ll_belowml ! Flag points below mixed layer when ll_found=F 35 39 36 40 REAL(wp), PUBLIC :: rho_c = 0.01_wp !: density criterion for mixed layer depth 37 41 REAL(wp) :: avt_c = 5.e-4_wp ! Kz criterion for the turbocline depth 42 43 ! Namelist variables for namzdf_mldzint 44 INTEGER :: nn_mld_type ! mixed layer type 45 REAL(wp) :: rn_zref ! depth of initial T_ref 46 REAL(wp) :: rn_dT_crit ! Critical temp diff 47 REAL(wp) :: rn_iso_frac ! Fraction of rn_dT_crit used 38 48 39 49 !! * Substitutions … … 52 62 zdf_mxl_alloc = 0 ! set to zero if no array to be allocated 53 63 IF( .NOT. ALLOCATED( nmln ) ) THEN 54 ALLOCATE( nmln(jpi,jpj), hmld(jpi,jpj), hmlp(jpi,jpj), hmlpt(jpi,jpj), STAT= zdf_mxl_alloc ) 64 ALLOCATE( nmln(jpi,jpj), hmld(jpi,jpj), hmlp(jpi,jpj), hmlpt(jpi,jpj), hmld_zint(jpi,jpj), & 65 & ll_found(jpi,jpj), ll_belowml(jpi,jpj,jpk), STAT= zdf_mxl_alloc ) 55 66 ! 56 67 IF( lk_mpp ) CALL mpp_sum ( zdf_mxl_alloc ) … … 149 160 ENDIF 150 161 162 ! Vertically-interpolated mixed-layer depth diagnostic 163 IF( iom_use( "mldzint" ) ) THEN 164 CALL zdf_mxl_zint( kt ) 165 CALL iom_put( "mldzint" , hmld_zint ) 166 ENDIF 167 151 168 IF(ln_ctl) CALL prt_ctl( tab2d_1=REAL(nmln,wp), clinfo1=' nmln : ', tab2d_2=hmlp, clinfo2=' hmlp : ', ovlap=1 ) 152 169 ! … … 156 173 ! 157 174 END SUBROUTINE zdf_mxl 175 176 SUBROUTINE zdf_mxl_zint( kt ) 177 !!---------------------------------------------------------------------------------- 178 !! *** ROUTINE zdf_mxl_zint *** 179 ! 180 ! Calculate vertically-interpolated mixed layer depth diagnostic. 181 ! 182 ! This routine can calculate the mixed layer depth diagnostic suggested by 183 ! Kara et al, 2000, JGR, 105, 16803, but is more general and can calculate 184 ! vertically-interpolated mixed-layer depth diagnostics with other parameter 185 ! settings set in the namzdf_mldzint namelist. 186 ! 187 ! If mld_type=1 the mixed layer depth is calculated as the depth at which the 188 ! density has increased by an amount equivalent to a temperature difference of 189 ! 0.8C at the surface. 190 ! 191 ! For other values of mld_type the mixed layer is calculated as the depth at 192 ! which the temperature differs by 0.8C from the surface temperature. 193 ! 194 ! David Acreman, Daley Calvert 195 ! 196 !!----------------------------------------------------------------------------------- 197 198 INTEGER, INTENT(in) :: kt ! ocean time-step index 199 ! 200 ! Local variables 201 INTEGER, POINTER, DIMENSION(:,:) :: ikmt ! number of active tracer levels 202 INTEGER, POINTER, DIMENSION(:,:) :: ik_ref ! index of reference level 203 INTEGER, POINTER, DIMENSION(:,:) :: ik_iso ! index of last uniform temp level 204 REAL, POINTER, DIMENSION(:,:,:) :: zT ! Temperature or density 205 REAL, POINTER, DIMENSION(:,:) :: ppzdep ! depth for use in calculating d(rho) 206 REAL, POINTER, DIMENSION(:,:) :: zT_ref ! reference temperature 207 REAL :: zT_b ! base temperature 208 REAL, POINTER, DIMENSION(:,:,:) :: zdTdz ! gradient of zT 209 REAL, POINTER, DIMENSION(:,:,:) :: zmoddT ! Absolute temperature difference 210 REAL :: zdz ! depth difference 211 REAL :: zdT ! temperature difference 212 REAL, POINTER, DIMENSION(:,:) :: zdelta_T ! difference critereon 213 REAL, POINTER, DIMENSION(:,:) :: zRHO1, zRHO2 ! Densities 214 INTEGER :: ji, jj, jk ! loop counter 215 INTEGER :: ios 216 217 NAMELIST/namzdf_mldzint/ nn_mld_type, rn_zref, rn_dT_crit, rn_iso_frac 218 219 !!------------------------------------------------------------------------------------- 220 ! 221 CALL wrk_alloc( jpi, jpj, ikmt, ik_ref, ik_iso) 222 CALL wrk_alloc( jpi, jpj, ppzdep, zT_ref, zdelta_T, zRHO1, zRHO2 ) 223 CALL wrk_alloc( jpi, jpj, jpk, zT, zdTdz, zmoddT ) 224 225 IF( kt == nit000 ) THEN 226 REWIND( numnam_ref ) ! Namelist namzdf_mldzint in reference namelist 227 READ ( numnam_ref, namzdf_mldzint, IOSTAT = ios, ERR = 901) 228 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namzdf_mldzint in reference namelist', lwp ) 229 230 REWIND( numnam_cfg ) ! Namelist namzdf_mldzint in configuration namelist 231 READ ( numnam_cfg, namzdf_mldzint, IOSTAT = ios, ERR = 902 ) 232 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namzdf_mldzint in configuration namelist', lwp ) 233 IF(lwm) WRITE ( numond, namzdf_mldzint ) 234 235 WRITE(numout,*) '===== Vertically-interpolated mixed layer =====' 236 WRITE(numout,*) 'nn_mld_type = ',nn_mld_type 237 WRITE(numout,*) 'rn_zref = ',rn_zref 238 WRITE(numout,*) 'rn_dT_crit = ',rn_dT_crit 239 WRITE(numout,*) 'rn_iso_frac = ',rn_iso_frac 240 WRITE(numout,*) '===============================================' 241 ENDIF 242 243 ! Set the mixed layer depth criterion at each grid point 244 IF (nn_mld_type == 1) THEN 245 ppzdep(:,:)=0.0 246 call eos ( tsn(:,:,1,:), ppzdep(:,:), zRHO1(:,:) ) 247 ! Use zT temporarily as a copy of tsn with rn_dT_crit added to SST 248 ! [assumes number of tracers less than number of vertical levels] 249 zT(:,:,1:jpts)=tsn(:,:,1,1:jpts) 250 zT(:,:,jp_tem)=zT(:,:,1)+rn_dT_crit 251 CALL eos( zT(:,:,1:jpts), ppzdep(:,:), zRHO2(:,:) ) 252 zdelta_T(:,:) = abs( zRHO1(:,:) - zRHO2(:,:) ) * rau0 253 ! RHO from eos (2d version) doesn't calculate north or east halo: 254 CALL lbc_lnk( zdelta_T, 'T', 1. ) 255 zT(:,:,:) = rhop(:,:,:) 256 ELSE 257 zdelta_T(:,:) = rn_dT_crit 258 zT(:,:,:) = tsn(:,:,:,jp_tem) 259 END IF 260 261 ! Calculate the gradient of zT and absolute difference for use later 262 DO jk = 1 ,jpk-2 263 zdTdz(:,:,jk) = ( zT(:,:,jk+1) - zT(:,:,jk) ) / fse3w(:,:,jk+1) 264 zmoddT(:,:,jk) = abs( zT(:,:,jk+1) - zT(:,:,jk) ) 265 END DO 266 267 ! Find density/temperature at the reference level (Kara et al use 10m). 268 ! ik_ref is the index of the box centre immediately above or at the reference level 269 ! Find rn_zref in the array of model level depths and find the ref 270 ! density/temperature by linear interpolation. 271 DO jk = jpkm1, 2, -1 272 WHERE ( fsdept(:,:,jk) > rn_zref ) 273 ik_ref(:,:) = jk - 1 274 zT_ref(:,:) = zT(:,:,jk-1) + zdTdz(:,:,jk-1) * ( rn_zref - fsdept(:,:,jk-1) ) 275 END WHERE 276 END DO 277 278 ! If the first grid box centre is below the reference level then use the 279 ! top model level to get zT_ref 280 WHERE ( fsdept(:,:,1) > rn_zref ) 281 zT_ref = zT(:,:,1) 282 ik_ref = 1 283 END WHERE 284 285 ! The number of active tracer levels is 1 less than the number of active w levels 286 ikmt(:,:) = mbathy(:,:) - 1 287 288 ! Search for a uniform density/temperature region where adjacent levels 289 ! differ by less than rn_iso_frac * deltaT. 290 ! ik_iso is the index of the last level in the uniform layer 291 ! ll_found indicates whether the mixed layer depth can be found by interpolation 292 ik_iso(:,:) = ik_ref(:,:) 293 ll_found(:,:) = .false. 294 DO jj = 1, nlcj 295 DO ji = 1, nlci 296 !CDIR NOVECTOR 297 DO jk = ik_ref(ji,jj), ikmt(ji,jj)-1 298 IF ( zmoddT(ji,jj,jk) > ( rn_iso_frac * zdelta_T(ji,jj) ) ) THEN 299 ik_iso(ji,jj) = jk 300 ll_found(ji,jj) = ( zmoddT(ji,jj,jk) > zdelta_T(ji,jj) ) 301 EXIT 302 END IF 303 END DO 304 END DO 305 END DO 306 307 ! Use linear interpolation to find depth of mixed layer base where possible 308 hmld_zint(:,:) = rn_zref 309 DO jj = 1, jpj 310 DO ji = 1, jpi 311 IF (ll_found(ji,jj) .and. tmask(ji,jj,1) == 1.0) THEN 312 zdz = abs( zdelta_T(ji,jj) / zdTdz(ji,jj,ik_iso(ji,jj)) ) 313 hmld_zint(ji,jj) = fsdept(ji,jj,ik_iso(ji,jj)) + zdz 314 END IF 315 END DO 316 END DO 317 318 ! If ll_found = .false. then calculate MLD using difference of zdelta_T 319 ! from the reference density/temperature 320 321 ! Prevent this section from working on land points 322 WHERE ( tmask(:,:,1) /= 1.0 ) 323 ll_found = .true. 324 END WHERE 325 326 DO jk=1, jpk 327 ll_belowml(:,:,jk) = abs( zT(:,:,jk) - zT_ref(:,:) ) >= zdelta_T(:,:) 328 END DO 329 330 ! Set default value where interpolation cannot be used (ll_found=false) 331 DO jj = 1, jpj 332 DO ji = 1, jpi 333 IF ( .not. ll_found(ji,jj) ) hmld_zint(ji,jj) = fsdept(ji,jj,ikmt(ji,jj)) 334 END DO 335 END DO 336 337 DO jj = 1, jpj 338 DO ji = 1, jpi 339 !CDIR NOVECTOR 340 DO jk = ik_ref(ji,jj)+1, ikmt(ji,jj) 341 IF ( ll_found(ji,jj) ) EXIT 342 IF ( ll_belowml(ji,jj,jk) ) THEN 343 zT_b = zT_ref(ji,jj) + zdelta_T(ji,jj) * SIGN(1.0, zdTdz(ji,jj,jk-1) ) 344 zdT = zT_b - zT(ji,jj,jk-1) 345 zdz = zdT / zdTdz(ji,jj,jk-1) 346 hmld_zint(ji,jj) = fsdept(ji,jj,jk-1) + zdz 347 EXIT 348 END IF 349 END DO 350 END DO 351 END DO 352 353 hmld_zint(:,:) = hmld_zint(:,:)*tmask(:,:,1) 354 ! 355 CALL wrk_dealloc( jpi, jpj, ikmt, ik_ref, ik_iso) 356 CALL wrk_dealloc( jpi, jpj, ppzdep, zT_ref, zdelta_T, zRHO1, zRHO2 ) 357 CALL wrk_dealloc( jpi,jpj, jpk, zT, zdTdz, zmoddT ) 358 ! 359 END SUBROUTINE zdf_mxl_zint 158 360 159 361 !!======================================================================
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