- Timestamp:
- 2011-11-14T14:13:32+01:00 (12 years ago)
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branches/2011/dev_MERCATOR_INGV_2011_MERGE/NEMOGCM/NEMO/OPA_SRC/ZDF/zdfric.F90
r2715 r3085 7 7 !! History : OPA ! 1987-09 (P. Andrich) Original code 8 8 !! 4.0 ! 1991-11 (G. Madec) 9 !! 7.0 ! 1996-01 (G. Madec) complet rewriting of multitasking suppression of common work arrays10 !! 8.0 ! 1997-06 (G. Madec) complete rewriting of zdfmix9 !! 7.0 ! 1996-01 (G. Madec) complete rewriting of multitasking suppression of common work arrays 10 !! 8.0 ! 1997-06 (G. Madec) complete rewriting of zdfmix 11 11 !! NEMO 1.0 ! 2002-06 (G. Madec) F90: Free form and module 12 12 !! 3.3 ! 2010-10 (C. Ethe, G. Madec) reorganisation of initialisation phase 13 !! 3.3.1! 2011-09 (P. Oddo) Mixed layer depth parameterization 13 14 !!---------------------------------------------------------------------- 14 15 #if defined key_zdfric || defined key_esopa … … 20 21 !! zdf_ric_init : initialization, namelist read, & parameters control 21 22 !!---------------------------------------------------------------------- 22 USE oce ! ocean dynamics and tracers variables 23 USE dom_oce ! ocean space and time domain variables 24 USE zdf_oce ! ocean vertical physics 25 USE in_out_manager ! I/O manager 26 USE lbclnk ! ocean lateral boundary condition (or mpp link) 27 USE lib_mpp ! MPP library 23 USE oce ! ocean dynamics and tracers variables 24 USE dom_oce ! ocean space and time domain variables 25 USE zdf_oce ! ocean vertical physics 26 USE in_out_manager ! I/O manager 27 USE lbclnk ! ocean lateral boundary condition (or mpp link) 28 USE lib_mpp ! MPP library 29 USE eosbn2, ONLY : nn_eos 28 30 29 31 IMPLICIT NONE … … 39 41 REAL(wp) :: rn_avmri = 100.e-4_wp ! maximum value of the vertical eddy viscosity 40 42 REAL(wp) :: rn_alp = 5._wp ! coefficient of the parameterization 43 REAL(wp) :: rn_ekmfc = 0.7_wp ! Ekman Factor Coeff 44 REAL(wp) :: rn_mldmin= 1.0_wp ! minimum mixed layer (ML) depth 45 REAL(wp) :: rn_mldmax=1000.0_wp ! maximum mixed layer depth 46 REAL(wp) :: rn_wtmix = 10.0_wp ! Vertical eddy Diff. in the ML 47 REAL(wp) :: rn_wvmix = 10.0_wp ! Vertical eddy Visc. in the ML 48 LOGICAL :: ln_mldw = .TRUE. ! Use or not the MLD parameters 41 49 42 50 REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,:,:) :: tmric !: coef. for the horizontal mean at t-point … … 67 75 !! 68 76 !! ** Purpose : Compute the before eddy viscosity and diffusivity as 69 !! a function of the local richardson number.77 !! a function of the local richardson number. 70 78 !! 71 79 !! ** Method : Local richardson number dependent formulation of the 72 !! vertical eddy viscosity and diffusivity coefficients.80 !! vertical eddy viscosity and diffusivity coefficients. 73 81 !! The eddy coefficients are given by: 74 82 !! avm = avm0 + avmb 75 83 !! avt = avm0 / (1 + rn_alp*ri) 76 !! with ri = N^2 / dz(u)**277 !! = e3w**2 * rn2/[ mi( dk(ub) )+mj( dk(vb) ) ]78 !! avm0= rn_avmri / (1 + rn_alp*ri)**nn_ric84 !! with ri = N^2 / dz(u)**2 85 !! = e3w**2 * rn2/[ mi( dk(ub) )+mj( dk(vb) ) ] 86 !! avm0= rn_avmri / (1 + rn_alp*ri)**nn_ric 79 87 !! Where ri is the before local Richardson number, 80 88 !! rn_avmri is the maximum value reaches by avm and avt … … 84 92 !! avtb=1.e-7 m2/s, rn_alp=5. and nn_ric=2. 85 93 !! a numerical threshold is impose on the vertical shear (1.e-20) 94 !! As second step compute Ekman depth from wind stress forcing 95 !! and apply namelist provided vertical coeff within this depth. 96 !! The Ekman depth is: 97 !! Ustar = SQRT(Taum/rho0) 98 !! ekd= rn_ekmfc * Ustar / f0 99 !! Large et al. (1994, eq.29) suggest rn_ekmfc=0.7; however, the derivation 100 !! of the above equation indicates the value is somewhat arbitrary; therefore 101 !! we allow the freedom to increase or decrease this value, if the 102 !! Ekman depth estimate appears too shallow or too deep, respectively. 103 !! Ekd is then limited by rn_mldmin and rn_mldmax provided in the 104 !! namelist 86 105 !! N.B. the mask are required for implicit scheme, and surface 87 106 !! and bottom value already set in zdfini.F90 88 107 !! 89 108 !! References : Pacanowski & Philander 1981, JPO, 1441-1451. 109 !! PFJ Lermusiaux 2001. 90 110 !!---------------------------------------------------------------------- 91 111 USE wrk_nemo, ONLY: wrk_in_use, wrk_not_released 92 USE wrk_nemo, ONLY: zwx => wrk_2d_1 ! 2D workspace 93 !! 94 INTEGER, INTENT( in ) :: kt ! ocean time-step indexocean time step 95 !! 96 INTEGER :: ji, jj, jk ! dummy loop indices 97 REAL(wp) :: zcoef, zdku, zdkv, zri, z05alp ! temporary scalars 98 !!---------------------------------------------------------------------- 99 100 IF( wrk_in_use(2, 1) ) THEN 112 USE wrk_nemo, ONLY: zwx => wrk_2d_1 ! 2D workspace 113 USE wrk_nemo, ONLY: ekm_dep => wrk_2d_2 ! 2D workspace 114 USE phycst, ONLY: rsmall,rau0 115 USE sbc_oce, ONLY: taum 116 !! 117 INTEGER, INTENT( in ) :: kt ! ocean time-step 118 !! 119 INTEGER :: ji, jj, jk ! dummy loop indices 120 REAL(wp) :: zcoef, zdku, zdkv, zri, z05alp, zflageos ! temporary scalars 121 REAL(wp) :: zrhos, zustar 122 !!---------------------------------------------------------------------- 123 124 IF( wrk_in_use(2, 1,2) ) THEN 101 125 CALL ctl_stop('zdf_ric : requested workspace array unavailable') ; RETURN 102 126 ENDIF … … 145 169 ! ! =============== 146 170 ! 171 IF( ln_mldw ) THEN 172 173 ! Compute Ekman depth from wind stress forcing. 174 ! ------------------------------------------------------- 175 zflageos = ( 0.5 + SIGN( 0.5, nn_eos - 1. ) ) * rau0 176 DO jj = 1, jpj 177 DO ji = 1, jpi 178 zrhos = rhop(ji,jj,1) + zflageos * ( 1. - tmask(ji,jj,1) ) 179 zustar = SQRT( taum(ji,jj) / ( zrhos + rsmall ) ) 180 ekm_dep(ji,jj) = rn_ekmfc * zustar / ( ABS( ff(ji,jj) ) + rsmall ) 181 ekm_dep(ji,jj) = MAX(ekm_dep(ji,jj),rn_mldmin) ! Minimun allowed 182 ekm_dep(ji,jj) = MIN(ekm_dep(ji,jj),rn_mldmax) ! Maximum allowed 183 END DO 184 END DO 185 186 ! In the first model level vertical diff/visc coeff.s 187 ! are always equal to the namelist values rn_wtmix/rn_wvmix 188 ! ------------------------------------------------------- 189 DO jj = 1, jpj 190 DO ji = 1, jpi 191 avmv(ji,jj,1) = MAX( avmv(ji,jj,1), rn_wvmix ) 192 avmu(ji,jj,1) = MAX( avmu(ji,jj,1), rn_wvmix ) 193 avt( ji,jj,1) = MAX( avt(ji,jj,1), rn_wtmix ) 194 END DO 195 END DO 196 197 ! Force the vertical mixing coef within the Ekman depth 198 ! ------------------------------------------------------- 199 DO jk = 2, jpkm1 200 DO jj = 1, jpj 201 DO ji = 1, jpi 202 IF( fsdept(ji,jj,jk) < ekm_dep(ji,jj) ) THEN 203 avmv(ji,jj,jk) = MAX( avmv(ji,jj,jk), rn_wvmix ) 204 avmu(ji,jj,jk) = MAX( avmu(ji,jj,jk), rn_wvmix ) 205 avt( ji,jj,jk) = MAX( avt(ji,jj,jk), rn_wtmix ) 206 ENDIF 207 END DO 208 END DO 209 END DO 210 211 DO jk = 1, jpkm1 212 DO jj = 1, jpj 213 DO ji = 1, jpi 214 avmv(ji,jj,jk) = avmv(ji,jj,jk) * vmask(ji,jj,jk) 215 avmu(ji,jj,jk) = avmu(ji,jj,jk) * umask(ji,jj,jk) 216 avt( ji,jj,jk) = avt( ji,jj,jk) * tmask(ji,jj,jk) 217 END DO 218 END DO 219 END DO 220 221 ENDIF 222 147 223 CALL lbc_lnk( avt , 'W', 1. ) ! Boundary conditions (unchanged sign) 148 224 CALL lbc_lnk( avmu, 'U', 1. ) ; CALL lbc_lnk( avmv, 'V', 1. ) 149 225 ! 150 IF( wrk_not_released(2, 1 ) ) CALL ctl_stop('zdf_ric: failed to release workspace array')226 IF( wrk_not_released(2, 1,2) ) CALL ctl_stop('zdf_ric: failed to release workspace array') 151 227 ! 152 228 END SUBROUTINE zdf_ric … … 168 244 INTEGER :: ji, jj, jk ! dummy loop indices 169 245 !! 170 NAMELIST/namzdf_ric/ rn_avmri, rn_alp, nn_ric 246 NAMELIST/namzdf_ric/ rn_avmri, rn_alp , nn_ric , rn_ekmfc, & 247 & rn_mldmin, rn_mldmax, rn_wtmix, rn_wvmix, ln_mldw 171 248 !!---------------------------------------------------------------------- 172 249 ! … … 179 256 WRITE(numout,*) '~~~~~~~' 180 257 WRITE(numout,*) ' Namelist namzdf_ric : set Kz(Ri) parameters' 181 WRITE(numout,*) ' maximum vertical viscosity rn_avmri = ', rn_avmri 182 WRITE(numout,*) ' coefficient rn_alp = ', rn_alp 183 WRITE(numout,*) ' coefficient nn_ric = ', nn_ric 258 WRITE(numout,*) ' maximum vertical viscosity rn_avmri = ', rn_avmri 259 WRITE(numout,*) ' coefficient rn_alp = ', rn_alp 260 WRITE(numout,*) ' coefficient nn_ric = ', nn_ric 261 WRITE(numout,*) ' Ekman Factor Coeff rn_ekmfc = ', rn_ekmfc 262 WRITE(numout,*) ' minimum mixed layer depth rn_mldmin = ', rn_mldmin 263 WRITE(numout,*) ' maximum mixed layer depth rn_mldmax = ', rn_mldmax 264 WRITE(numout,*) ' Vertical eddy Diff. in the ML rn_wtmix = ', rn_wtmix 265 WRITE(numout,*) ' Vertical eddy Visc. in the ML rn_wvmix = ', rn_wvmix 266 WRITE(numout,*) ' Use the MLD parameterization ln_mldw = ', ln_mldw 184 267 ENDIF 185 268 !
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