| [3] | 1 | MODULE trasbc |
|---|
| 2 | !!============================================================================== |
|---|
| 3 | !! *** MODULE trasbc *** |
|---|
| 4 | !! Ocean active tracers: surface boundary condition |
|---|
| 5 | !!============================================================================== |
|---|
| [2528] | 6 | !! History : OPA ! 1998-10 (G. Madec, G. Roullet, M. Imbard) Original code |
|---|
| 7 | !! 8.2 ! 2001-02 (D. Ludicone) sea ice and free surface |
|---|
| 8 | !! NEMO 1.0 ! 2002-06 (G. Madec) F90: Free form and module |
|---|
| 9 | !! 3.3 ! 2010-04 (M. Leclair, G. Madec) Forcing averaged over 2 time steps |
|---|
| 10 | !! - ! 2010-09 (C. Ethe, G. Madec) Merge TRA-TRC |
|---|
| [5120] | 11 | !! 3.6 ! 2014-11 (P. Mathiot) isf melting forcing |
|---|
| [3] | 12 | !!---------------------------------------------------------------------- |
|---|
| [503] | 13 | |
|---|
| 14 | !!---------------------------------------------------------------------- |
|---|
| [6140] | 15 | !! tra_sbc : update the tracer trend at ocean surface |
|---|
| [3] | 16 | !!---------------------------------------------------------------------- |
|---|
| [6140] | 17 | USE oce ! ocean dynamics and active tracers |
|---|
| 18 | USE sbc_oce ! surface boundary condition: ocean |
|---|
| 19 | USE dom_oce ! ocean space domain variables |
|---|
| 20 | USE phycst ! physical constant |
|---|
| 21 | USE eosbn2 ! Equation Of State |
|---|
| 22 | USE sbcmod ! ln_rnf |
|---|
| 23 | USE sbcrnf ! River runoff |
|---|
| 24 | USE sbcisf ! Ice shelf |
|---|
| 25 | USE iscplini ! Ice sheet coupling |
|---|
| 26 | USE traqsr ! solar radiation penetration |
|---|
| 27 | USE trd_oce ! trends: ocean variables |
|---|
| 28 | USE trdtra ! trends manager: tracers |
|---|
| [9023] | 29 | #if defined key_asminc |
|---|
| 30 | USE asminc ! Assimilation increment |
|---|
| 31 | #endif |
|---|
| [4990] | 32 | ! |
|---|
| [6140] | 33 | USE in_out_manager ! I/O manager |
|---|
| 34 | USE prtctl ! Print control |
|---|
| 35 | USE iom ! xIOS server |
|---|
| 36 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
|---|
| 37 | USE timing ! Timing |
|---|
| [9023] | 38 | USE wet_dry, ONLY : ll_wd, rn_wdmin1, r_rn_wdmin1 ! Wetting and drying |
|---|
| [3] | 39 | |
|---|
| 40 | IMPLICIT NONE |
|---|
| 41 | PRIVATE |
|---|
| 42 | |
|---|
| [6140] | 43 | PUBLIC tra_sbc ! routine called by step.F90 |
|---|
| [3] | 44 | |
|---|
| 45 | !! * Substitutions |
|---|
| 46 | # include "vectopt_loop_substitute.h90" |
|---|
| 47 | !!---------------------------------------------------------------------- |
|---|
| [4990] | 48 | !! NEMO/OPA 3.7 , NEMO Consortium (2014) |
|---|
| [888] | 49 | !! $Id$ |
|---|
| [2715] | 50 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
|---|
| [3] | 51 | !!---------------------------------------------------------------------- |
|---|
| 52 | CONTAINS |
|---|
| 53 | |
|---|
| 54 | SUBROUTINE tra_sbc ( kt ) |
|---|
| 55 | !!---------------------------------------------------------------------- |
|---|
| 56 | !! *** ROUTINE tra_sbc *** |
|---|
| 57 | !! |
|---|
| 58 | !! ** Purpose : Compute the tracer surface boundary condition trend of |
|---|
| 59 | !! (flux through the interface, concentration/dilution effect) |
|---|
| 60 | !! and add it to the general trend of tracer equations. |
|---|
| 61 | !! |
|---|
| [6140] | 62 | !! ** Method : The (air+ice)-sea flux has two components: |
|---|
| 63 | !! (1) Fext, external forcing (i.e. flux through the (air+ice)-sea interface); |
|---|
| 64 | !! (2) Fwe , tracer carried with the water that is exchanged with air+ice. |
|---|
| 65 | !! The input forcing fields (emp, rnf, sfx, isf) contain Fext+Fwe, |
|---|
| 66 | !! they are simply added to the tracer trend (tsa). |
|---|
| 67 | !! In linear free surface case (ln_linssh=T), the volume of the |
|---|
| 68 | !! ocean does not change with the water exchanges at the (air+ice)-sea |
|---|
| 69 | !! interface. Therefore another term has to be added, to mimic the |
|---|
| 70 | !! concentration/dilution effect associated with water exchanges. |
|---|
| [664] | 71 | !! |
|---|
| [6140] | 72 | !! ** Action : - Update tsa with the surface boundary condition trend |
|---|
| 73 | !! - send trends to trdtra module for further diagnostics(l_trdtra=T) |
|---|
| [503] | 74 | !!---------------------------------------------------------------------- |
|---|
| [2528] | 75 | INTEGER, INTENT(in) :: kt ! ocean time-step index |
|---|
| [6140] | 76 | ! |
|---|
| [9023] | 77 | INTEGER :: ji, jj, jk, jn ! dummy loop indices |
|---|
| 78 | INTEGER :: ikt, ikb ! local integers |
|---|
| 79 | REAL(wp) :: zfact, z1_e3t, zdep, ztim ! local scalar |
|---|
| [9019] | 80 | REAL(wp), ALLOCATABLE, DIMENSION(:,:,:) :: ztrdt, ztrds |
|---|
| [3] | 81 | !!---------------------------------------------------------------------- |
|---|
| [3294] | 82 | ! |
|---|
| [9019] | 83 | IF( ln_timing ) CALL timing_start('tra_sbc') |
|---|
| [3294] | 84 | ! |
|---|
| [3] | 85 | IF( kt == nit000 ) THEN |
|---|
| 86 | IF(lwp) WRITE(numout,*) |
|---|
| 87 | IF(lwp) WRITE(numout,*) 'tra_sbc : TRAcer Surface Boundary Condition' |
|---|
| 88 | IF(lwp) WRITE(numout,*) '~~~~~~~ ' |
|---|
| 89 | ENDIF |
|---|
| [6140] | 90 | ! |
|---|
| [4990] | 91 | IF( l_trdtra ) THEN !* Save ta and sa trends |
|---|
| [9019] | 92 | ALLOCATE( ztrdt(jpi,jpj,jpk) , ztrds(jpi,jpj,jpk) ) |
|---|
| [7753] | 93 | ztrdt(:,:,:) = tsa(:,:,:,jp_tem) |
|---|
| 94 | ztrds(:,:,:) = tsa(:,:,:,jp_sal) |
|---|
| [216] | 95 | ENDIF |
|---|
| [6140] | 96 | ! |
|---|
| 97 | !!gm This should be moved into sbcmod.F90 module ? (especially now that ln_traqsr is read in namsbc namelist) |
|---|
| [2528] | 98 | IF( .NOT.ln_traqsr ) THEN ! no solar radiation penetration |
|---|
| [7753] | 99 | qns(:,:) = qns(:,:) + qsr(:,:) ! total heat flux in qns |
|---|
| 100 | qsr(:,:) = 0._wp ! qsr set to zero |
|---|
| [2528] | 101 | ENDIF |
|---|
| [3] | 102 | |
|---|
| [2528] | 103 | !---------------------------------------- |
|---|
| [4990] | 104 | ! EMP, SFX and QNS effects |
|---|
| [2528] | 105 | !---------------------------------------- |
|---|
| [6140] | 106 | ! !== Set before sbc tracer content fields ==! |
|---|
| 107 | IF( kt == nit000 ) THEN !* 1st time-step |
|---|
| 108 | IF( ln_rstart .AND. & ! Restart: read in restart file |
|---|
| [2528] | 109 | & iom_varid( numror, 'sbc_hc_b', ldstop = .FALSE. ) > 0 ) THEN |
|---|
| [6140] | 110 | IF(lwp) WRITE(numout,*) ' nit000-1 sbc tracer content field read in the restart file' |
|---|
| [4990] | 111 | zfact = 0.5_wp |
|---|
| [7753] | 112 | sbc_tsc(:,:,:) = 0._wp |
|---|
| [2528] | 113 | CALL iom_get( numror, jpdom_autoglo, 'sbc_hc_b', sbc_tsc_b(:,:,jp_tem) ) ! before heat content sbc trend |
|---|
| 114 | CALL iom_get( numror, jpdom_autoglo, 'sbc_sc_b', sbc_tsc_b(:,:,jp_sal) ) ! before salt content sbc trend |
|---|
| [6140] | 115 | ELSE ! No restart or restart not found: Euler forward time stepping |
|---|
| [4990] | 116 | zfact = 1._wp |
|---|
| [7753] | 117 | sbc_tsc(:,:,:) = 0._wp |
|---|
| 118 | sbc_tsc_b(:,:,:) = 0._wp |
|---|
| [2528] | 119 | ENDIF |
|---|
| [6140] | 120 | ELSE !* other time-steps: swap of forcing fields |
|---|
| [4990] | 121 | zfact = 0.5_wp |
|---|
| [7753] | 122 | sbc_tsc_b(:,:,:) = sbc_tsc(:,:,:) |
|---|
| [2528] | 123 | ENDIF |
|---|
| [6140] | 124 | ! !== Now sbc tracer content fields ==! |
|---|
| 125 | DO jj = 2, jpj |
|---|
| 126 | DO ji = fs_2, fs_jpim1 ! vector opt. |
|---|
| [9023] | 127 | IF ( ll_wd ) THEN ! If near WAD point limit the flux for now |
|---|
| 128 | IF ( sshn(ji,jj) + ht_0(ji,jj) > 2._wp * rn_wdmin1 ) THEN |
|---|
| 129 | sbc_tsc(ji,jj,jp_tem) = r1_rau0_rcp * qns(ji,jj) ! non solar heat flux |
|---|
| 130 | ELSE IF ( sshn(ji,jj) + ht_0(ji,jj) > rn_wdmin1 ) THEN |
|---|
| 131 | sbc_tsc(ji,jj,jp_tem) = r1_rau0_rcp * qns(ji,jj) * (tanh(5._wp*( ( sshn(ji,jj) + ht_0(ji,jj) - rn_wdmin1 )*r_rn_wdmin1)) ) |
|---|
| 132 | ELSE |
|---|
| 133 | sbc_tsc(ji,jj,jp_tem) = 0._wp |
|---|
| 134 | ENDIF |
|---|
| 135 | ELSE |
|---|
| 136 | sbc_tsc(ji,jj,jp_tem) = r1_rau0_rcp * qns(ji,jj) ! non solar heat flux |
|---|
| 137 | ENDIF |
|---|
| 138 | |
|---|
| [6140] | 139 | sbc_tsc(ji,jj,jp_sal) = r1_rau0 * sfx(ji,jj) ! salt flux due to freezing/melting |
|---|
| [3] | 140 | END DO |
|---|
| [6140] | 141 | END DO |
|---|
| 142 | IF( ln_linssh ) THEN !* linear free surface |
|---|
| 143 | DO jj = 2, jpj !==>> add concentration/dilution effect due to constant volume cell |
|---|
| [2528] | 144 | DO ji = fs_2, fs_jpim1 ! vector opt. |
|---|
| [6140] | 145 | sbc_tsc(ji,jj,jp_tem) = sbc_tsc(ji,jj,jp_tem) + r1_rau0 * emp(ji,jj) * tsn(ji,jj,1,jp_tem) |
|---|
| 146 | sbc_tsc(ji,jj,jp_sal) = sbc_tsc(ji,jj,jp_sal) + r1_rau0 * emp(ji,jj) * tsn(ji,jj,1,jp_sal) |
|---|
| [2528] | 147 | END DO |
|---|
| [6140] | 148 | END DO !==>> output c./d. term |
|---|
| 149 | IF( iom_use('emp_x_sst') ) CALL iom_put( "emp_x_sst", emp (:,:) * tsn(:,:,1,jp_tem) ) |
|---|
| 150 | IF( iom_use('emp_x_sss') ) CALL iom_put( "emp_x_sss", emp (:,:) * tsn(:,:,1,jp_sal) ) |
|---|
| [2528] | 151 | ENDIF |
|---|
| [6140] | 152 | ! |
|---|
| 153 | DO jn = 1, jpts !== update tracer trend ==! |
|---|
| [2528] | 154 | DO jj = 2, jpj |
|---|
| [6140] | 155 | DO ji = fs_2, fs_jpim1 ! vector opt. |
|---|
| 156 | tsa(ji,jj,1,jn) = tsa(ji,jj,1,jn) + zfact * ( sbc_tsc_b(ji,jj,jn) + sbc_tsc(ji,jj,jn) ) / e3t_n(ji,jj,1) |
|---|
| [2528] | 157 | END DO |
|---|
| 158 | END DO |
|---|
| [3] | 159 | END DO |
|---|
| [6140] | 160 | ! |
|---|
| 161 | IF( lrst_oce ) THEN !== write sbc_tsc in the ocean restart file ==! |
|---|
| [2528] | 162 | CALL iom_rstput( kt, nitrst, numrow, 'sbc_hc_b', sbc_tsc(:,:,jp_tem) ) |
|---|
| 163 | CALL iom_rstput( kt, nitrst, numrow, 'sbc_sc_b', sbc_tsc(:,:,jp_sal) ) |
|---|
| 164 | ENDIF |
|---|
| 165 | ! |
|---|
| 166 | !---------------------------------------- |
|---|
| [4990] | 167 | ! Ice Shelf effects (ISF) |
|---|
| 168 | ! tbl treated as in Losh (2008) JGR |
|---|
| 169 | !---------------------------------------- |
|---|
| 170 | ! |
|---|
| [6140] | 171 | !!gm BUG ? Why no differences between non-linear and linear free surface ? |
|---|
| 172 | !!gm probably taken into account in r1_hisf_tbl : to be verified |
|---|
| 173 | IF( ln_isf ) THEN |
|---|
| 174 | zfact = 0.5_wp |
|---|
| [4990] | 175 | DO jj = 2, jpj |
|---|
| 176 | DO ji = fs_2, fs_jpim1 |
|---|
| [6140] | 177 | ! |
|---|
| [4990] | 178 | ikt = misfkt(ji,jj) |
|---|
| 179 | ikb = misfkb(ji,jj) |
|---|
| [6140] | 180 | ! |
|---|
| [4990] | 181 | ! level fully include in the ice shelf boundary layer |
|---|
| 182 | ! sign - because fwf sign of evapo (rnf sign of precip) |
|---|
| 183 | DO jk = ikt, ikb - 1 |
|---|
| 184 | ! compute trend |
|---|
| [6140] | 185 | tsa(ji,jj,jk,jp_tem) = tsa(ji,jj,jk,jp_tem) & |
|---|
| 186 | & + zfact * ( risf_tsc_b(ji,jj,jp_tem) + risf_tsc(ji,jj,jp_tem) ) & |
|---|
| 187 | & * r1_hisf_tbl(ji,jj) |
|---|
| [4990] | 188 | END DO |
|---|
| 189 | |
|---|
| 190 | ! level partially include in ice shelf boundary layer |
|---|
| 191 | ! compute trend |
|---|
| [6140] | 192 | tsa(ji,jj,ikb,jp_tem) = tsa(ji,jj,ikb,jp_tem) & |
|---|
| 193 | & + zfact * ( risf_tsc_b(ji,jj,jp_tem) + risf_tsc(ji,jj,jp_tem) ) & |
|---|
| 194 | & * r1_hisf_tbl(ji,jj) * ralpha(ji,jj) |
|---|
| 195 | |
|---|
| [4990] | 196 | END DO |
|---|
| 197 | END DO |
|---|
| 198 | END IF |
|---|
| 199 | ! |
|---|
| 200 | !---------------------------------------- |
|---|
| [2528] | 201 | ! River Runoff effects |
|---|
| 202 | !---------------------------------------- |
|---|
| 203 | ! |
|---|
| [3764] | 204 | IF( ln_rnf ) THEN ! input of heat and salt due to river runoff |
|---|
| 205 | zfact = 0.5_wp |
|---|
| [2528] | 206 | DO jj = 2, jpj |
|---|
| 207 | DO ji = fs_2, fs_jpim1 |
|---|
| [3764] | 208 | IF( rnf(ji,jj) /= 0._wp ) THEN |
|---|
| 209 | zdep = zfact / h_rnf(ji,jj) |
|---|
| [2528] | 210 | DO jk = 1, nk_rnf(ji,jj) |
|---|
| [6140] | 211 | tsa(ji,jj,jk,jp_tem) = tsa(ji,jj,jk,jp_tem) & |
|---|
| 212 | & + ( rnf_tsc_b(ji,jj,jp_tem) + rnf_tsc(ji,jj,jp_tem) ) * zdep |
|---|
| 213 | IF( ln_rnf_sal ) tsa(ji,jj,jk,jp_sal) = tsa(ji,jj,jk,jp_sal) & |
|---|
| 214 | & + ( rnf_tsc_b(ji,jj,jp_sal) + rnf_tsc(ji,jj,jp_sal) ) * zdep |
|---|
| [2715] | 215 | END DO |
|---|
| [2528] | 216 | ENDIF |
|---|
| [2715] | 217 | END DO |
|---|
| 218 | END DO |
|---|
| [3764] | 219 | ENDIF |
|---|
| [6472] | 220 | |
|---|
| 221 | IF( iom_use('rnf_x_sst') ) CALL iom_put( "rnf_x_sst", rnf*tsn(:,:,1,jp_tem) ) ! runoff term on sst |
|---|
| 222 | IF( iom_use('rnf_x_sss') ) CALL iom_put( "rnf_x_sss", rnf*tsn(:,:,1,jp_sal) ) ! runoff term on sss |
|---|
| 223 | |
|---|
| [9023] | 224 | #if defined key_asminc |
|---|
| [6140] | 225 | ! |
|---|
| 226 | !---------------------------------------- |
|---|
| [9023] | 227 | ! Assmilation effects |
|---|
| 228 | !---------------------------------------- |
|---|
| 229 | ! |
|---|
| 230 | IF( ln_sshinc ) THEN ! input of heat and salt due to assimilation |
|---|
| 231 | ! |
|---|
| 232 | IF( ln_linssh ) THEN |
|---|
| 233 | DO jj = 2, jpj |
|---|
| 234 | DO ji = fs_2, fs_jpim1 |
|---|
| 235 | ztim = ssh_iau(ji,jj) / e3t_n(ji,jj,1) |
|---|
| 236 | tsa(ji,jj,1,jp_tem) = tsa(ji,jj,1,jp_tem) + tsn(ji,jj,1,jp_tem) * ztim |
|---|
| 237 | tsa(ji,jj,1,jp_sal) = tsa(ji,jj,1,jp_sal) + tsn(ji,jj,1,jp_sal) * ztim |
|---|
| 238 | END DO |
|---|
| 239 | END DO |
|---|
| 240 | ELSE |
|---|
| 241 | DO jj = 2, jpj |
|---|
| 242 | DO ji = fs_2, fs_jpim1 |
|---|
| 243 | ztim = ssh_iau(ji,jj) / ( ht_n(ji,jj) + 1. - ssmask(ji, jj) ) |
|---|
| 244 | tsa(ji,jj,:,jp_tem) = tsa(ji,jj,:,jp_tem) + tsn(ji,jj,:,jp_tem) * ztim |
|---|
| 245 | tsa(ji,jj,:,jp_sal) = tsa(ji,jj,:,jp_sal) + tsn(ji,jj,:,jp_sal) * ztim |
|---|
| 246 | END DO |
|---|
| 247 | END DO |
|---|
| 248 | ENDIF |
|---|
| 249 | ! |
|---|
| 250 | ENDIF |
|---|
| 251 | ! |
|---|
| 252 | #endif |
|---|
| 253 | |
|---|
| 254 | ! |
|---|
| 255 | !---------------------------------------- |
|---|
| [6140] | 256 | ! Ice Sheet coupling imbalance correction to have conservation |
|---|
| 257 | !---------------------------------------- |
|---|
| 258 | ! |
|---|
| 259 | IF( ln_iscpl .AND. ln_hsb) THEN ! input of heat and salt due to river runoff |
|---|
| 260 | DO jk = 1,jpk |
|---|
| 261 | DO jj = 2, jpj |
|---|
| 262 | DO ji = fs_2, fs_jpim1 |
|---|
| 263 | zdep = 1._wp / e3t_n(ji,jj,jk) |
|---|
| 264 | tsa(ji,jj,jk,jp_tem) = tsa(ji,jj,jk,jp_tem) - htsc_iscpl(ji,jj,jk,jp_tem) & |
|---|
| 265 | & * zdep |
|---|
| 266 | tsa(ji,jj,jk,jp_sal) = tsa(ji,jj,jk,jp_sal) - htsc_iscpl(ji,jj,jk,jp_sal) & |
|---|
| 267 | & * zdep |
|---|
| 268 | END DO |
|---|
| 269 | END DO |
|---|
| 270 | END DO |
|---|
| 271 | ENDIF |
|---|
| 272 | |
|---|
| 273 | IF( l_trdtra ) THEN ! save the horizontal diffusive trends for further diagnostics |
|---|
| [7753] | 274 | ztrdt(:,:,:) = tsa(:,:,:,jp_tem) - ztrdt(:,:,:) |
|---|
| 275 | ztrds(:,:,:) = tsa(:,:,:,jp_sal) - ztrds(:,:,:) |
|---|
| [4990] | 276 | CALL trd_tra( kt, 'TRA', jp_tem, jptra_nsr, ztrdt ) |
|---|
| 277 | CALL trd_tra( kt, 'TRA', jp_sal, jptra_nsr, ztrds ) |
|---|
| [9019] | 278 | DEALLOCATE( ztrdt , ztrds ) |
|---|
| [216] | 279 | ENDIF |
|---|
| [503] | 280 | ! |
|---|
| [2528] | 281 | IF(ln_ctl) CALL prt_ctl( tab3d_1=tsa(:,:,:,jp_tem), clinfo1=' sbc - Ta: ', mask1=tmask, & |
|---|
| 282 | & tab3d_2=tsa(:,:,:,jp_sal), clinfo2= ' Sa: ', mask2=tmask, clinfo3='tra' ) |
|---|
| [503] | 283 | ! |
|---|
| [9019] | 284 | IF( ln_timing ) CALL timing_stop('tra_sbc') |
|---|
| [3294] | 285 | ! |
|---|
| [3] | 286 | END SUBROUTINE tra_sbc |
|---|
| 287 | |
|---|
| 288 | !!====================================================================== |
|---|
| 289 | END MODULE trasbc |
|---|
