Changeset 6043 for branches/2014/dev_r4650_UKMO14.12_STAND_ALONE_OBSOPER/NEMOGCM/NEMO/OPA_SRC/DYN/dynnxt.F90
- Timestamp:
- 2015-12-14T10:27:28+01:00 (8 years ago)
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branches/2014/dev_r4650_UKMO14.12_STAND_ALONE_OBSOPER/NEMOGCM/NEMO/OPA_SRC/DYN/dynnxt.F90
r5600 r6043 19 19 !! 3.5 ! 2013-07 (J. Chanut) Compliant with time splitting changes 20 20 !! 3.7 ! 2014-04 (G. Madec) add the diagnostic of the time filter trends 21 !! 3.7 ! 2015-11 (J. Chanut) Free surface simplification 21 22 !!------------------------------------------------------------------------- 22 23 … … 28 29 USE sbc_oce ! Surface boundary condition: ocean fields 29 30 USE phycst ! physical constants 30 USE dynspg_oce ! type of surface pressure gradient31 31 USE dynadv ! dynamics: vector invariant versus flux form 32 32 USE domvvl ! variable volume … … 68 68 !! *** ROUTINE dyn_nxt *** 69 69 !! 70 !! ** Purpose : Compute the after horizontal velocity. Apply the boundary71 !! condition on the after velocity, achieve dthe time stepping70 !! ** Purpose : Finalize after horizontal velocity. Apply the boundary 71 !! condition on the after velocity, achieve the time stepping 72 72 !! by applying the Asselin filter on now fields and swapping 73 73 !! the fields. 74 74 !! 75 !! ** Method : * After velocity is compute using a leap-frog scheme: 76 !! (ua,va) = (ub,vb) + 2 rdt (ua,va) 77 !! Note that with flux form advection and variable volume layer 78 !! (lk_vvl=T), the leap-frog is applied on thickness weighted 79 !! velocity. 80 !! Note also that in filtered free surface (lk_dynspg_flt=T), 81 !! the time stepping has already been done in dynspg module 75 !! ** Method : * Ensure after velocities transport matches time splitting 76 !! estimate (ln_dynspg_ts=T) 82 77 !! 83 78 !! * Apply lateral boundary conditions on after velocity … … 101 96 INTEGER :: ji, jj, jk ! dummy loop indices 102 97 INTEGER :: iku, ikv ! local integers 103 #if ! defined key_dynspg_flt 104 REAL(wp) :: z2dt ! temporary scalar 105 #endif 106 REAL(wp) :: zue3a, zue3n, zue3b, zuf, zec ! local scalars 98 REAL(wp) :: zue3a, zue3n, zue3b, zuf ! local scalars 107 99 REAL(wp) :: zve3a, zve3n, zve3b, zvf, z1_2dt ! - - 108 100 REAL(wp), POINTER, DIMENSION(:,:) :: zue, zve … … 112 104 IF( nn_timing == 1 ) CALL timing_start('dyn_nxt') 113 105 ! 114 CALL wrk_alloc( jpi,jpj,jpk, ze3u_f, ze3v_f, zua, zva ) 115 IF( lk_dynspg_ts ) CALL wrk_alloc( jpi,jpj, zue, zve ) 106 IF( ln_dynspg_ts ) CALL wrk_alloc( jpi,jpj, zue, zve ) 107 IF( lk_vvl.AND.(.NOT.ln_dynadv_vec ) ) CALL wrk_alloc( jpi,jpj,jpk, ze3u_f, ze3v_f ) 108 IF( l_trddyn ) CALL wrk_alloc( jpi,jpj,jpk, zua, zva ) 116 109 ! 117 110 IF( kt == nit000 ) THEN … … 121 114 ENDIF 122 115 123 #if defined key_dynspg_flt 124 ! 125 ! Next velocity : Leap-frog time stepping already done in dynspg_flt.F routine 126 ! ------------- 127 128 ! Update after velocity on domain lateral boundaries (only local domain required) 129 ! -------------------------------------------------- 130 CALL lbc_lnk( ua, 'U', -1. ) ! local domain boundaries 131 CALL lbc_lnk( va, 'V', -1. ) 132 ! 133 #else 134 135 # if defined key_dynspg_exp 136 ! Next velocity : Leap-frog time stepping 137 ! ------------- 138 z2dt = 2. * rdt ! Euler or leap-frog time step 139 IF( neuler == 0 .AND. kt == nit000 ) z2dt = rdt 140 ! 141 IF( ln_dynadv_vec .OR. .NOT. lk_vvl ) THEN ! applied on velocity 116 IF ( ln_dynspg_ts ) THEN 117 ! Ensure below that barotropic velocities match time splitting estimate 118 ! Compute actual transport and replace it with ts estimate at "after" time step 119 zue(:,:) = fse3u_a(:,:,1) * ua(:,:,1) * umask(:,:,1) 120 zve(:,:) = fse3v_a(:,:,1) * va(:,:,1) * vmask(:,:,1) 121 DO jk = 2, jpkm1 122 zue(:,:) = zue(:,:) + fse3u_a(:,:,jk) * ua(:,:,jk) * umask(:,:,jk) 123 zve(:,:) = zve(:,:) + fse3v_a(:,:,jk) * va(:,:,jk) * vmask(:,:,jk) 124 END DO 142 125 DO jk = 1, jpkm1 143 ua(:,:,jk) = ( ub(:,:,jk) + z2dt * ua(:,:,jk) ) * umask(:,:,jk) 144 va(:,:,jk) = ( vb(:,:,jk) + z2dt * va(:,:,jk) ) * vmask(:,:,jk) 145 END DO 146 ELSE ! applied on thickness weighted velocity 147 DO jk = 1, jpkm1 148 ua(:,:,jk) = ( ub(:,:,jk) * fse3u_b(:,:,jk) & 149 & + z2dt * ua(:,:,jk) * fse3u_n(:,:,jk) ) & 150 & / fse3u_a(:,:,jk) * umask(:,:,jk) 151 va(:,:,jk) = ( vb(:,:,jk) * fse3v_b(:,:,jk) & 152 & + z2dt * va(:,:,jk) * fse3v_n(:,:,jk) ) & 153 & / fse3v_a(:,:,jk) * vmask(:,:,jk) 154 END DO 155 ENDIF 156 # endif 157 158 # if defined key_dynspg_ts 159 !!gm IF ( lk_dynspg_ts ) THEN .... 160 ! Ensure below that barotropic velocities match time splitting estimate 161 ! Compute actual transport and replace it with ts estimate at "after" time step 162 zue(:,:) = fse3u_a(:,:,1) * ua(:,:,1) * umask(:,:,1) 163 zve(:,:) = fse3v_a(:,:,1) * va(:,:,1) * vmask(:,:,1) 164 DO jk = 2, jpkm1 165 zue(:,:) = zue(:,:) + fse3u_a(:,:,jk) * ua(:,:,jk) * umask(:,:,jk) 166 zve(:,:) = zve(:,:) + fse3v_a(:,:,jk) * va(:,:,jk) * vmask(:,:,jk) 167 END DO 168 DO jk = 1, jpkm1 169 ua(:,:,jk) = ( ua(:,:,jk) - zue(:,:) * hur_a(:,:) + ua_b(:,:) ) * umask(:,:,jk) 170 va(:,:,jk) = ( va(:,:,jk) - zve(:,:) * hvr_a(:,:) + va_b(:,:) ) * vmask(:,:,jk) 171 END DO 172 173 IF (lk_dynspg_ts.AND.(.NOT.ln_bt_fw)) THEN 174 ! Remove advective velocity from "now velocities" 175 ! prior to asselin filtering 176 ! In the forward case, this is done below after asselin filtering 177 ! so that asselin contribution is removed at the same time 178 DO jk = 1, jpkm1 179 un(:,:,jk) = ( un(:,:,jk) - un_adv(:,:) + un_b(:,:) )*umask(:,:,jk) 180 vn(:,:,jk) = ( vn(:,:,jk) - vn_adv(:,:) + vn_b(:,:) )*vmask(:,:,jk) 181 END DO 182 ENDIF 183 !!gm ENDIF 184 # endif 126 ua(:,:,jk) = ( ua(:,:,jk) - zue(:,:) * hur_a(:,:) + ua_b(:,:) ) * umask(:,:,jk) 127 va(:,:,jk) = ( va(:,:,jk) - zve(:,:) * hvr_a(:,:) + va_b(:,:) ) * vmask(:,:,jk) 128 END DO 129 130 IF ( .NOT.ln_bt_fw ) THEN 131 ! Remove advective velocity from "now velocities" 132 ! prior to asselin filtering 133 ! In the forward case, this is done below after asselin filtering 134 ! so that asselin contribution is removed at the same time 135 DO jk = 1, jpkm1 136 un(:,:,jk) = ( un(:,:,jk) - un_adv(:,:) + un_b(:,:) )*umask(:,:,jk) 137 vn(:,:,jk) = ( vn(:,:,jk) - vn_adv(:,:) + vn_b(:,:) )*vmask(:,:,jk) 138 END DO 139 ENDIF 140 ENDIF 185 141 186 142 ! Update after velocity on domain lateral boundaries 187 143 ! -------------------------------------------------- 188 CALL lbc_lnk( ua, 'U', -1. ) !* local domain boundaries189 CALL lbc_lnk( va, 'V', -1. )190 !191 # if defined key_bdy192 ! !* BDY open boundaries193 IF( lk_bdy .AND. lk_dynspg_exp ) CALL bdy_dyn( kt )194 IF( lk_bdy .AND. lk_dynspg_ts ) CALL bdy_dyn( kt, dyn3d_only=.true. )195 196 !!$ Do we need a call to bdy_vol here??197 !198 # endif199 !200 144 # if defined key_agrif 201 145 CALL Agrif_dyn( kt ) !* AGRIF zoom boundaries 202 146 # endif 203 #endif 204 147 ! 148 CALL lbc_lnk( ua, 'U', -1. ) !* local domain boundaries 149 CALL lbc_lnk( va, 'V', -1. ) 150 ! 151 # if defined key_bdy 152 ! !* BDY open boundaries 153 IF( lk_bdy .AND. ln_dynspg_exp ) CALL bdy_dyn( kt ) 154 IF( lk_bdy .AND. ln_dynspg_ts ) CALL bdy_dyn( kt, dyn3d_only=.true. ) 155 156 !!$ Do we need a call to bdy_vol here?? 157 ! 158 # endif 159 ! 205 160 IF( l_trddyn ) THEN ! prepare the atf trend computation + some diagnostics 206 161 z1_2dt = 1._wp / (2. * rdt) ! Euler or leap-frog time step … … 259 214 ! (used as a now filtered scale factor until the swap) 260 215 ! ---------------------------------------------------- 261 IF (l k_dynspg_ts.AND.ln_bt_fw) THEN216 IF (ln_dynspg_ts.AND.ln_bt_fw) THEN 262 217 ! No asselin filtering on thicknesses if forward time splitting 263 218 fse3t_b(:,:,:) = fse3t_n(:,:,:) 264 219 ELSE 265 220 fse3t_b(:,:,:) = fse3t_n(:,:,:) + atfp * ( fse3t_b(:,:,:) - 2._wp * fse3t_n(:,:,:) + fse3t_a(:,:,:) ) 266 221 ! Add volume filter correction: compatibility with tracer advection scheme 267 222 ! => time filter + conservation correction (only at the first level) 268 fse3t_b(:,:,1) = fse3t_b(:,:,1) - atfp * rdt * r1_rau0 * ( emp_b(:,:) - emp(:,:) & 269 & -rnf_b(:,:) + rnf(:,:) ) * tmask(:,:,1) 223 IF ( nn_isf == 0) THEN ! if no ice shelf melting 224 fse3t_b(:,:,1) = fse3t_b(:,:,1) - atfp * rdt * r1_rau0 * ( emp_b(:,:) - emp(:,:) & 225 & -rnf_b(:,:) + rnf(:,:) ) * tmask(:,:,1) 226 ELSE ! if ice shelf melting 227 DO jj = 1,jpj 228 DO ji = 1,jpi 229 jk = mikt(ji,jj) 230 fse3t_b(ji,jj,jk) = fse3t_b(ji,jj,jk) - atfp * rdt * r1_rau0 & 231 & * ( (emp_b(ji,jj) - emp(ji,jj) ) & 232 & - (rnf_b(ji,jj) - rnf(ji,jj) ) & 233 & + (fwfisf_b(ji,jj) - fwfisf(ji,jj)) ) * tmask(ji,jj,jk) 234 END DO 235 END DO 236 END IF 270 237 ENDIF 271 238 ! … … 324 291 ENDIF 325 292 ! 326 IF (l k_dynspg_ts.AND.ln_bt_fw) THEN293 IF (ln_dynspg_ts.AND.ln_bt_fw) THEN 327 294 ! Revert "before" velocities to time split estimate 328 295 ! Doing it here also means that asselin filter contribution is removed … … 388 355 IF(ln_ctl) CALL prt_ctl( tab3d_1=un, clinfo1=' nxt - Un: ', mask1=umask, & 389 356 & tab3d_2=vn, clinfo2=' Vn: ' , mask2=vmask ) 390 ! 391 CALL wrk_dealloc( jpi,jpj,jpk, ze3u_f, ze3v_f, zua, zva ) 392 IF( lk_dynspg_ts ) CALL wrk_dealloc( jpi,jpj, zue, zve ) 357 ! 358 IF( ln_dynspg_ts ) CALL wrk_dealloc( jpi,jpj, zue, zve ) 359 IF( lk_vvl.AND.(.NOT.ln_dynadv_vec ) ) CALL wrk_dealloc( jpi,jpj,jpk, ze3u_f, ze3v_f ) 360 IF( l_trddyn ) CALL wrk_dealloc( jpi,jpj,jpk, zua, zva ) 393 361 ! 394 362 IF( nn_timing == 1 ) CALL timing_stop('dyn_nxt')
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