[3] | 1 | MODULE ldfeiv |
---|
| 2 | !!====================================================================== |
---|
| 3 | !! *** MODULE ldfeiv *** |
---|
| 4 | !! Ocean physics: variable eddy induced velocity coefficients |
---|
| 5 | !!====================================================================== |
---|
| 6 | #if defined key_traldf_eiv && defined key_traldf_c2d |
---|
| 7 | !!---------------------------------------------------------------------- |
---|
| 8 | !! 'key_traldf_eiv' and eddy induced velocity |
---|
| 9 | !! 'key_traldf_c2d' 2D tracer lateral mixing coef. |
---|
| 10 | !!---------------------------------------------------------------------- |
---|
| 11 | !! ldf_eiv : compute the eddy induced velocity coefficients |
---|
| 12 | !!---------------------------------------------------------------------- |
---|
| 13 | !! * Modules used |
---|
| 14 | USE oce ! ocean dynamics and tracers |
---|
| 15 | USE dom_oce ! ocean space and time domain |
---|
[888] | 16 | USE sbc_oce ! surface boundary condition: ocean |
---|
| 17 | USE sbcrnf ! river runoffs |
---|
[3] | 18 | USE ldftra_oce ! ocean tracer lateral physics |
---|
| 19 | USE phycst ! physical constants |
---|
| 20 | USE ldfslp ! iso-neutral slopes |
---|
| 21 | USE in_out_manager ! I/O manager |
---|
| 22 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
---|
[258] | 23 | USE prtctl ! Print control |
---|
[3] | 24 | |
---|
| 25 | IMPLICIT NONE |
---|
| 26 | PRIVATE |
---|
| 27 | |
---|
| 28 | !! * Routine accessibility |
---|
| 29 | PUBLIC ldf_eiv ! routine called by step.F90 |
---|
[247] | 30 | !!---------------------------------------------------------------------- |
---|
| 31 | !! OPA 9.0 , LOCEAN-IPSL (2005) |
---|
[888] | 32 | !! $Id$ |
---|
[247] | 33 | !! This software is governed by the CeCILL licence see modipsl/doc/NEMO_CeCILL.txt |
---|
| 34 | !!---------------------------------------------------------------------- |
---|
[3] | 35 | !! * Substitutions |
---|
| 36 | # include "domzgr_substitute.h90" |
---|
| 37 | # include "vectopt_loop_substitute.h90" |
---|
| 38 | !!---------------------------------------------------------------------- |
---|
| 39 | |
---|
| 40 | CONTAINS |
---|
| 41 | |
---|
| 42 | SUBROUTINE ldf_eiv( kt ) |
---|
| 43 | !!---------------------------------------------------------------------- |
---|
| 44 | !! *** ROUTINE ldf_eiv *** |
---|
| 45 | !! |
---|
| 46 | !! ** Purpose : Compute the eddy induced velocity coefficient from the |
---|
| 47 | !! growth rate of baroclinic instability. |
---|
| 48 | !! |
---|
| 49 | !! ** Method : |
---|
| 50 | !! |
---|
| 51 | !! ** Action : - uslp(), : i- and j-slopes of neutral surfaces |
---|
| 52 | !! - vslp() at u- and v-points, resp. |
---|
| 53 | !! - wslpi(), : i- and j-slopes of neutral surfaces |
---|
| 54 | !! - wslpj() at w-points. |
---|
| 55 | !! |
---|
| 56 | !! History : |
---|
| 57 | !! 8.1 ! 99-03 (G. Madec, A. Jouzeau) Original code |
---|
| 58 | !! 8.5 ! 02-06 (G. Madec) Free form, F90 |
---|
| 59 | !!---------------------------------------------------------------------- |
---|
| 60 | !! * Arguments |
---|
| 61 | INTEGER, INTENT( in ) :: kt ! ocean time-step inedx |
---|
| 62 | |
---|
| 63 | !! * Local declarations |
---|
| 64 | INTEGER :: ji, jj, jk ! dummy loop indices |
---|
| 65 | REAL(wp) :: & |
---|
| 66 | zfw, ze3w, zn2, zf20, & ! temporary scalars |
---|
| 67 | zaht, zaht_min |
---|
| 68 | REAL(wp), DIMENSION(jpi,jpj) :: & |
---|
| 69 | zn, zah, zhw, zross ! workspace |
---|
| 70 | !!---------------------------------------------------------------------- |
---|
| 71 | |
---|
| 72 | IF( kt == nit000 ) THEN |
---|
| 73 | IF(lwp) WRITE(numout,*) |
---|
| 74 | IF(lwp) WRITE(numout,*) 'ldf_eiv : eddy induced velocity coefficients' |
---|
| 75 | IF(lwp) WRITE(numout,*) '~~~~~~~' |
---|
| 76 | ENDIF |
---|
| 77 | |
---|
| 78 | ! 0. Local initialization |
---|
| 79 | ! ----------------------- |
---|
| 80 | zn (:,:) = 0.e0 |
---|
| 81 | zhw (:,:) = 5.e0 |
---|
| 82 | zah (:,:) = 0.e0 |
---|
| 83 | zross(:,:) = 0.e0 |
---|
| 84 | |
---|
| 85 | |
---|
| 86 | ! 1. Compute lateral diffusive coefficient |
---|
| 87 | ! ---------------------------------------- |
---|
| 88 | |
---|
| 89 | DO jk = 1, jpk |
---|
[789] | 90 | # if defined key_vectopt_loop |
---|
[3] | 91 | !CDIR NOVERRCHK |
---|
| 92 | DO ji = 1, jpij ! vector opt. |
---|
| 93 | ! Take the max of N^2 and zero then take the vertical sum |
---|
| 94 | ! of the square root of the resulting N^2 ( required to compute |
---|
| 95 | ! internal Rossby radius Ro = .5 * sum_jpk(N) / f |
---|
| 96 | zn2 = MAX( rn2(ji,1,jk), 0.e0 ) |
---|
| 97 | zn(ji,1) = zn(ji,1) + SQRT( zn2 ) * fse3w(ji,1,jk) |
---|
| 98 | ! Compute elements required for the inverse time scale of baroclinic |
---|
| 99 | ! eddies using the isopycnal slopes calculated in ldfslp.F : |
---|
| 100 | ! T^-1 = sqrt(m_jpk(N^2*(r1^2+r2^2)*e3w)) |
---|
| 101 | ze3w = fse3w(ji,1,jk) * tmask(ji,1,jk) |
---|
| 102 | zah(ji,1) = zah(ji,1) + zn2 & |
---|
| 103 | * ( wslpi(ji,1,jk) * wslpi(ji,1,jk) & |
---|
| 104 | + wslpj(ji,1,jk) * wslpj(ji,1,jk) ) & |
---|
| 105 | * ze3w |
---|
| 106 | zhw(ji,1) = zhw(ji,1) + ze3w |
---|
| 107 | END DO |
---|
[80] | 108 | # else |
---|
[3] | 109 | DO jj = 2, jpjm1 |
---|
| 110 | !CDIR NOVERRCHK |
---|
| 111 | DO ji = 2, jpim1 |
---|
| 112 | ! Take the max of N^2 and zero then take the vertical sum |
---|
| 113 | ! of the square root of the resulting N^2 ( required to compute |
---|
| 114 | ! internal Rossby radius Ro = .5 * sum_jpk(N) / f |
---|
| 115 | zn2 = MAX( rn2(ji,jj,jk), 0.e0 ) |
---|
| 116 | zn(ji,jj) = zn(ji,jj) + SQRT( zn2 ) * fse3w(ji,jj,jk) |
---|
| 117 | ! Compute elements required for the inverse time scale of baroclinic |
---|
| 118 | ! eddies using the isopycnal slopes calculated in ldfslp.F : |
---|
| 119 | ! T^-1 = sqrt(m_jpk(N^2*(r1^2+r2^2)*e3w)) |
---|
| 120 | ze3w = fse3w(ji,jj,jk) * tmask(ji,jj,jk) |
---|
| 121 | zah(ji,jj) = zah(ji,jj) + zn2 & |
---|
| 122 | * ( wslpi(ji,jj,jk) * wslpi(ji,jj,jk) & |
---|
| 123 | + wslpj(ji,jj,jk) * wslpj(ji,jj,jk) ) & |
---|
| 124 | * ze3w |
---|
| 125 | zhw(ji,jj) = zhw(ji,jj) + ze3w |
---|
| 126 | END DO |
---|
| 127 | END DO |
---|
[80] | 128 | # endif |
---|
[3] | 129 | END DO |
---|
| 130 | |
---|
| 131 | DO jj = 2, jpjm1 |
---|
| 132 | !CDIR NOVERRCHK |
---|
| 133 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
| 134 | zfw = MAX( ABS( 2. * omega * SIN( rad * gphit(ji,jj) ) ) , 1.e-10 ) |
---|
| 135 | ! Rossby radius at w-point taken < 40km and > 2km |
---|
| 136 | zross(ji,jj) = MAX( MIN( .4 * zn(ji,jj) / zfw, 40.e3 ), 2.e3 ) |
---|
| 137 | ! Compute aeiw by multiplying Ro^2 and T^-1 |
---|
| 138 | aeiw(ji,jj) = zross(ji,jj) * zross(ji,jj) * SQRT( zah(ji,jj) / zhw(ji,jj) ) * tmask(ji,jj,1) |
---|
[895] | 139 | END DO |
---|
| 140 | END DO |
---|
| 141 | |
---|
| 142 | IF( cp_cfg == "orca" .AND. jp_cfg == 2 ) THEN ! ORCA R02 |
---|
| 143 | DO jj = 2, jpjm1 |
---|
| 144 | !CDIR NOVERRCHK |
---|
| 145 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
[605] | 146 | ! Take the minimum between aeiw and aeiv0 for depth levels |
---|
| 147 | ! lower than 20 (21 in w- point) |
---|
| 148 | IF( mbathy(ji,jj) <= 21. ) aeiw(ji,jj) = MIN( aeiw(ji,jj), 1000. ) |
---|
[895] | 149 | END DO |
---|
[3] | 150 | END DO |
---|
[895] | 151 | ENDIF |
---|
[3] | 152 | |
---|
| 153 | ! Decrease the coefficient in the tropics (20N-20S) |
---|
[605] | 154 | zf20 = 2. * omega * sin( rad * 20. ) |
---|
[3] | 155 | DO jj = 2, jpjm1 |
---|
| 156 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
| 157 | aeiw(ji,jj) = MIN( 1., ABS( ff(ji,jj) / zf20 ) ) * aeiw(ji,jj) |
---|
| 158 | END DO |
---|
| 159 | END DO |
---|
| 160 | |
---|
[605] | 161 | ! ORCA R05: Take the minimum between aeiw and aeiv0 |
---|
[3] | 162 | IF( cp_cfg == "orca" .AND. jp_cfg == 05 ) THEN |
---|
| 163 | DO jj = 2, jpjm1 |
---|
| 164 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
[28] | 165 | aeiw(ji,jj) = MIN( aeiw(ji,jj), aeiv0 ) |
---|
[3] | 166 | END DO |
---|
| 167 | END DO |
---|
| 168 | ENDIF |
---|
| 169 | |
---|
| 170 | ! lateral boundary condition on aeiw |
---|
| 171 | CALL lbc_lnk( aeiw, 'W', 1. ) |
---|
| 172 | |
---|
| 173 | ! Average the diffusive coefficient at u- v- points |
---|
| 174 | DO jj = 2, jpjm1 |
---|
| 175 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
| 176 | aeiu(ji,jj) = .5 * ( aeiw(ji,jj) + aeiw(ji+1,jj ) ) |
---|
| 177 | aeiv(ji,jj) = .5 * ( aeiw(ji,jj) + aeiw(ji ,jj+1) ) |
---|
| 178 | END DO |
---|
| 179 | END DO |
---|
| 180 | |
---|
| 181 | ! lateral boundary condition on aeiu, aeiv |
---|
| 182 | CALL lbc_lnk( aeiu, 'U', 1. ) |
---|
| 183 | CALL lbc_lnk( aeiv, 'V', 1. ) |
---|
| 184 | |
---|
[258] | 185 | IF(ln_ctl) THEN |
---|
| 186 | CALL prt_ctl(tab2d_1=aeiu, clinfo1=' eiv - u: ', ovlap=1) |
---|
| 187 | CALL prt_ctl(tab2d_1=aeiv, clinfo1=' eiv - v: ', ovlap=1) |
---|
| 188 | ENDIF |
---|
[80] | 189 | |
---|
[3] | 190 | ! ORCA R05: add a space variation on aht (=aeiv except at the equator and river mouth) |
---|
| 191 | IF( cp_cfg == "orca" .AND. jp_cfg == 05 ) THEN |
---|
| 192 | zf20 = 2. * omega * SIN( rad * 20. ) |
---|
| 193 | zaht_min = 100. ! minimum value for aht |
---|
| 194 | DO jj = 1, jpj |
---|
| 195 | DO ji = 1, jpi |
---|
| 196 | zaht = ( 1. - MIN( 1., ABS( ff(ji,jj) / zf20 ) ) ) * ( aht0 - zaht_min ) & |
---|
[888] | 197 | & + aht0 * rnfmsk(ji,jj) ! enhanced near river mouths |
---|
[80] | 198 | ahtu(ji,jj) = MAX( MAX( zaht_min, aeiu(ji,jj) ) + zaht, aht0 ) |
---|
| 199 | ahtv(ji,jj) = MAX( MAX( zaht_min, aeiv(ji,jj) ) + zaht, aht0 ) |
---|
| 200 | ahtw(ji,jj) = MAX( MAX( zaht_min, aeiw(ji,jj) ) + zaht, aht0 ) |
---|
[3] | 201 | END DO |
---|
| 202 | END DO |
---|
[258] | 203 | IF(ln_ctl) THEN |
---|
| 204 | CALL prt_ctl(tab2d_1=ahtu, clinfo1=' aht - u: ', ovlap=1) |
---|
| 205 | CALL prt_ctl(tab2d_1=ahtv, clinfo1=' aht - v: ', ovlap=1) |
---|
| 206 | CALL prt_ctl(tab2d_1=ahtw, clinfo1=' aht - w: ', ovlap=1) |
---|
[106] | 207 | ENDIF |
---|
[3] | 208 | ENDIF |
---|
[461] | 209 | |
---|
[450] | 210 | IF( aeiv0 == 0.e0 ) THEN |
---|
| 211 | aeiu(:,:) = 0.e0 |
---|
| 212 | aeiv(:,:) = 0.e0 |
---|
| 213 | aeiw(:,:) = 0.e0 |
---|
| 214 | ENDIF |
---|
[3] | 215 | |
---|
| 216 | END SUBROUTINE ldf_eiv |
---|
| 217 | |
---|
| 218 | #else |
---|
| 219 | !!---------------------------------------------------------------------- |
---|
[28] | 220 | !! Default option Dummy module |
---|
[3] | 221 | !!---------------------------------------------------------------------- |
---|
| 222 | CONTAINS |
---|
[28] | 223 | SUBROUTINE ldf_eiv( kt ) ! Empty routine |
---|
| 224 | WRITE(*,*) 'ldf_eiv: You should not have seen this print! error?', kt |
---|
[3] | 225 | END SUBROUTINE ldf_eiv |
---|
| 226 | #endif |
---|
| 227 | |
---|
| 228 | !!====================================================================== |
---|
| 229 | END MODULE ldfeiv |
---|