| 1 | MODULE usrdef_zgr |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE usrdef_zgr *** |
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| 4 | !! |
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| 5 | !! === OVERFLOW case === |
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| 6 | !! |
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| 7 | !! user defined : vertical coordinate system of a user configuration |
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| 8 | !!====================================================================== |
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| 9 | !! History : 4.0 ! 2016-08 (G. Madec, S. Flavoni) Original code |
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| 10 | !!---------------------------------------------------------------------- |
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| 11 | |
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| 12 | !!---------------------------------------------------------------------- |
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| 13 | !! usr_def_zgr : user defined vertical coordinate system (required) |
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| 14 | !! zgr_z1d : reference 1D z-coordinate |
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| 15 | !!--------------------------------------------------------------------- |
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| 16 | USE oce ! ocean variables |
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| 17 | USE dom_oce , ONLY: mi0, mi1 ! ocean space and time domain |
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| 18 | USE dom_oce , ONLY: glamt ! ocean space and time domain |
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| 19 | USE usrdef_nam ! User defined : namelist variables |
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| 20 | ! |
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| 21 | USE in_out_manager ! I/O manager |
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| 22 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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| 23 | USE lib_mpp ! distributed memory computing library |
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| 24 | USE timing ! Timing |
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| 25 | |
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| 26 | IMPLICIT NONE |
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| 27 | PRIVATE |
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| 28 | |
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| 29 | PUBLIC usr_def_zgr ! called by domzgr.F90 |
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| 30 | |
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| 31 | !! * Substitutions |
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| 32 | # include "do_loop_substitute.h90" |
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| 33 | !!---------------------------------------------------------------------- |
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| 34 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
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| 35 | !! $Id$ |
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| 36 | !! Software governed by the CeCILL license (see ./LICENSE) |
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| 37 | !!---------------------------------------------------------------------- |
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| 38 | CONTAINS |
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| 39 | |
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| 40 | SUBROUTINE usr_def_zgr( ld_zco , ld_zps , ld_sco , ld_isfcav, & ! type of vertical coordinate |
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| 41 | & pdept_1d, pdepw_1d, pe3t_1d , pe3w_1d , & ! 1D reference vertical coordinate |
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| 42 | & pdept , pdepw , & ! 3D t & w-points depth |
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| 43 | & pe3t , pe3u , pe3v , pe3f , & ! vertical scale factors |
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| 44 | & pe3w , pe3uw , pe3vw, & ! - - - |
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| 45 | & k_top , k_bot ) ! top & bottom ocean level |
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| 46 | !!--------------------------------------------------------------------- |
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| 47 | !! *** ROUTINE usr_def_zgr *** |
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| 48 | !! |
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| 49 | !! ** Purpose : User defined the vertical coordinates |
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| 50 | !! |
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| 51 | !!---------------------------------------------------------------------- |
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| 52 | LOGICAL , INTENT(in ) :: ld_zco, ld_zps, ld_sco ! vertical coordinate flags ( read in namusr_def ) |
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| 53 | LOGICAL , INTENT( out) :: ld_isfcav ! under iceshelf cavity flag |
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| 54 | REAL(wp), DIMENSION(:) , INTENT( out) :: pdept_1d, pdepw_1d ! 1D grid-point depth [m] |
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| 55 | REAL(wp), DIMENSION(:) , INTENT( out) :: pe3t_1d , pe3w_1d ! 1D grid-point depth [m] |
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| 56 | REAL(wp), DIMENSION(:,:,:), INTENT( out) :: pdept, pdepw ! grid-point depth [m] |
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| 57 | REAL(wp), DIMENSION(:,:,:), INTENT( out) :: pe3t , pe3u , pe3v , pe3f ! vertical scale factors [m] |
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| 58 | REAL(wp), DIMENSION(:,:,:), INTENT( out) :: pe3w , pe3uw, pe3vw ! i-scale factors |
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| 59 | INTEGER , DIMENSION(:,:) , INTENT( out) :: k_top, k_bot ! first & last ocean level |
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| 60 | ! |
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| 61 | INTEGER :: ji, jj, jk ! dummy indices |
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| 62 | INTEGER :: ik ! local integers |
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| 63 | REAL(wp) :: zfact, z1_jpkm1 ! local scalar |
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| 64 | REAL(wp) :: ze3min ! local scalar |
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| 65 | REAL(wp), DIMENSION(jpi,jpj) :: zht, zhu, z2d ! 2D workspace |
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| 66 | !!---------------------------------------------------------------------- |
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| 67 | ! |
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| 68 | IF(lwp) WRITE(numout,*) |
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| 69 | IF(lwp) WRITE(numout,*) 'usr_def_zgr : OVERFLOW configuration (z(ps)- or s-coordinate closed box ocean without cavities)' |
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| 70 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~' |
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| 71 | ! |
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| 72 | ! |
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| 73 | ! type of vertical coordinate |
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| 74 | ! --------------------------- |
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| 75 | ! already set in usrdef_nam.F90 by reading the namusr_def namelist except for ISF |
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| 76 | ld_isfcav = .FALSE. |
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| 77 | ! |
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| 78 | ! |
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| 79 | ! Build the vertical coordinate system |
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| 80 | ! ------------------------------------ |
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| 81 | ! |
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| 82 | ! !== UNmasked meter bathymetry ==! |
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| 83 | ! |
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| 84 | ! western continental shelf (500m deep) and eastern deep ocean (2000m deep) |
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| 85 | ! (set through the jpk and jpi (see userdef_nam.F90)) |
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| 86 | ! with a hyperbolic tangent transition centered at 40km |
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| 87 | ! NB: here glamt is in kilometers |
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| 88 | ! |
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| 89 | zht(:,:) = + ( 500. + 0.5 * 1500. * ( 1.0 + tanh( (glamt(:,:) - 40.) / 7. ) ) ) |
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| 90 | ! |
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| 91 | ! at u-point: averaging zht |
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| 92 | DO ji = 1, jpim1 |
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| 93 | zhu(ji,:) = 0.5_wp * ( zht(ji,:) + zht(ji+1,:) ) |
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| 94 | END DO |
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| 95 | #if defined key_mpi3 |
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| 96 | CALL lbc_lnk_nc_multi( 'usrdef_zgr', zhu, 'U', 1. ) ! boundary condition: this mask the surrouding grid-points |
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| 97 | #else |
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| 98 | CALL lbc_lnk( 'usrdef_zgr', zhu, 'U', 1. ) ! boundary condition: this mask the surrouding grid-points |
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| 99 | #endif |
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| 100 | ! ! ==>>> set by hand non-zero value on first/last columns & rows |
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| 101 | DO ji = mi0(1), mi1(1) ! first row of global domain only |
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| 102 | zhu(ji,2) = zht(ji,2) |
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| 103 | END DO |
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| 104 | DO ji = mi0(jpiglo), mi1(jpiglo) ! last row of global domain only |
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| 105 | zhu(ji,2) = zht(ji,2) |
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| 106 | END DO |
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| 107 | zhu(:,1) = zhu(:,2) |
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| 108 | zhu(:,3) = zhu(:,2) |
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| 109 | ! |
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| 110 | CALL zgr_z1d( pdept_1d, pdepw_1d, pe3t_1d , pe3w_1d ) ! Reference z-coordinate system |
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| 111 | ! |
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| 112 | ! |
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| 113 | ! !== top masked level bathymetry ==! (all coordinates) |
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| 114 | ! |
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| 115 | ! no ocean cavities : top ocean level is ONE, except over land |
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| 116 | ! the ocean basin surrounded by land (1 grid-point) set through lbc_lnk call as jperio=0 |
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| 117 | z2d(:,:) = 1._wp ! surface ocean is the 1st level |
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| 118 | #if defined key_mpi3 |
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| 119 | CALL lbc_lnk_nc_multi( 'usrdef_zgr', z2d, 'T', 1. ) ! closed basin since jperio = 0 (see userdef_nam.F90) |
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| 120 | #else |
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| 121 | CALL lbc_lnk( 'usrdef_zgr', z2d, 'T', 1. ) ! closed basin since jperio = 0 (see userdef_nam.F90) |
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| 122 | #endif |
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| 123 | k_top(:,:) = NINT( z2d(:,:) ) |
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| 124 | ! |
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| 125 | ! |
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| 126 | ! |
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| 127 | IF ( ld_sco ) THEN !== s-coordinate ==! (terrain-following coordinate) |
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| 128 | ! |
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| 129 | k_bot(:,:) = jpkm1 * k_top(:,:) !* bottom ocean = jpk-1 (here use k_top as a land mask) |
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| 130 | ! |
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| 131 | ! !* terrain-following coordinate with e3.(k)=cst) |
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| 132 | ! ! OVERFLOW case : identical with j-index (T=V, U=F) |
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| 133 | z1_jpkm1 = 1._wp / REAL( jpkm1 , wp) |
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| 134 | DO jk = 1, jpk |
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| 135 | pdept(:,:,jk) = zht(:,:) * z1_jpkm1 * ( REAL( jk , wp ) - 0.5_wp ) |
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| 136 | pdepw(:,:,jk) = zht(:,:) * z1_jpkm1 * ( REAL( jk-1 , wp ) ) |
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| 137 | pe3t (:,:,jk) = zht(:,:) * z1_jpkm1 |
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| 138 | pe3u (:,:,jk) = zhu(:,:) * z1_jpkm1 |
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| 139 | pe3v (:,:,jk) = zht(:,:) * z1_jpkm1 |
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| 140 | pe3f (:,:,jk) = zhu(:,:) * z1_jpkm1 |
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| 141 | pe3w (:,:,jk) = zht(:,:) * z1_jpkm1 |
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| 142 | pe3uw(:,:,jk) = zhu(:,:) * z1_jpkm1 |
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| 143 | pe3vw(:,:,jk) = zht(:,:) * z1_jpkm1 |
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| 144 | END DO |
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| 145 | ENDIF |
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| 146 | ! |
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| 147 | ! |
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| 148 | IF ( ld_zco ) THEN !== z-coordinate ==! (step-like topography) |
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| 149 | ! |
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| 150 | ! !* bottom ocean compute from the depth of grid-points |
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| 151 | k_bot(:,:) = jpkm1 * k_top(:,:) ! here use k_top as a land mask |
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| 152 | DO jk = 1, jpkm1 |
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| 153 | WHERE( pdept_1d(jk) < zht(:,:) .AND. zht(:,:) <= pdept_1d(jk+1) ) k_bot(:,:) = jk * k_top(:,:) |
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| 154 | END DO |
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| 155 | ! !* horizontally uniform coordinate (reference z-co everywhere) |
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| 156 | DO jk = 1, jpk |
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| 157 | pdept(:,:,jk) = pdept_1d(jk) |
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| 158 | pdepw(:,:,jk) = pdepw_1d(jk) |
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| 159 | pe3t (:,:,jk) = pe3t_1d (jk) |
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| 160 | pe3u (:,:,jk) = pe3t_1d (jk) |
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| 161 | pe3v (:,:,jk) = pe3t_1d (jk) |
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| 162 | pe3f (:,:,jk) = pe3t_1d (jk) |
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| 163 | pe3w (:,:,jk) = pe3w_1d (jk) |
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| 164 | pe3uw(:,:,jk) = pe3w_1d (jk) |
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| 165 | pe3vw(:,:,jk) = pe3w_1d (jk) |
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| 166 | END DO |
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| 167 | ENDIF |
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| 168 | ! |
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| 169 | ! |
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| 170 | IF ( ld_zps ) THEN !== zps-coordinate ==! (partial bottom-steps) |
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| 171 | ! |
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| 172 | ze3min = 0.1_wp * rn_dz |
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| 173 | IF(lwp) WRITE(numout,*) ' minimum thickness of the partial cells = 10 % of e3 = ', ze3min |
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| 174 | ! |
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| 175 | ! |
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| 176 | ! !* bottom ocean compute from the depth of grid-points |
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| 177 | k_bot(:,:) = jpkm1 |
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| 178 | DO jk = jpkm1, 1, -1 |
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| 179 | WHERE( zht(:,:) < pdepw_1d(jk) + ze3min ) k_bot(:,:) = jk-1 |
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| 180 | END DO |
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| 181 | ! |
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| 182 | ! !* vertical coordinate system |
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| 183 | DO jk = 1, jpk ! initialization to the reference z-coordinate |
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| 184 | pdept(:,:,jk) = pdept_1d(jk) |
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| 185 | pdepw(:,:,jk) = pdepw_1d(jk) |
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| 186 | pe3t (:,:,jk) = pe3t_1d (jk) |
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| 187 | pe3u (:,:,jk) = pe3t_1d (jk) |
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| 188 | pe3v (:,:,jk) = pe3t_1d (jk) |
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| 189 | pe3f (:,:,jk) = pe3t_1d (jk) |
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| 190 | pe3w (:,:,jk) = pe3w_1d (jk) |
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| 191 | pe3uw(:,:,jk) = pe3w_1d (jk) |
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| 192 | pe3vw(:,:,jk) = pe3w_1d (jk) |
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| 193 | END DO |
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| 194 | DO_2D( 1, 1, 1, 1 ) |
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| 195 | ik = k_bot(ji,jj) |
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| 196 | pdepw(ji,jj,ik+1) = MIN( zht(ji,jj) , pdepw_1d(ik+1) ) |
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| 197 | pe3t (ji,jj,ik ) = pdepw(ji,jj,ik+1) - pdepw(ji,jj,ik) |
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| 198 | pe3t (ji,jj,ik+1) = pe3t (ji,jj,ik ) |
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| 199 | ! |
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| 200 | pdept(ji,jj,ik ) = pdepw(ji,jj,ik ) + pe3t (ji,jj,ik ) * 0.5_wp |
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| 201 | pdept(ji,jj,ik+1) = pdepw(ji,jj,ik+1) + pe3t (ji,jj,ik+1) * 0.5_wp |
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| 202 | pe3w (ji,jj,ik+1) = pdept(ji,jj,ik+1) - pdept(ji,jj,ik) ! = pe3t (ji,jj,ik ) |
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| 203 | END_2D |
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| 204 | ! ! bottom scale factors and depth at U-, V-, UW and VW-points |
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| 205 | ! ! usually Computed as the minimum of neighbooring scale factors |
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| 206 | pe3u (:,:,:) = pe3t(:,:,:) ! HERE OVERFLOW configuration : |
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| 207 | pe3v (:,:,:) = pe3t(:,:,:) ! e3 increases with i-index and identical with j-index |
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| 208 | pe3f (:,:,:) = pe3t(:,:,:) ! so e3 minimum of (i,i+1) points is (i) point |
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| 209 | pe3uw(:,:,:) = pe3w(:,:,:) ! in j-direction e3v=e3t and e3f=e3v |
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| 210 | pe3vw(:,:,:) = pe3w(:,:,:) ! ==>> no need of lbc_lnk calls |
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| 211 | ! |
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| 212 | ENDIF |
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| 213 | ! |
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| 214 | END SUBROUTINE usr_def_zgr |
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| 215 | |
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| 216 | |
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| 217 | SUBROUTINE zgr_z1d( pdept_1d, pdepw_1d, pe3t_1d , pe3w_1d ) ! 1D reference vertical coordinate |
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| 218 | !!---------------------------------------------------------------------- |
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| 219 | !! *** ROUTINE zgr_z1d *** |
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| 220 | !! |
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| 221 | !! ** Purpose : set the depth of model levels and the resulting |
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| 222 | !! vertical scale factors. |
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| 223 | !! |
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| 224 | !! ** Method : 1D z-coordinate system (use in all type of coordinate) |
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| 225 | !! The depth of model levels is set from dep(k), an analytical function: |
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| 226 | !! w-level: depw_1d = dep(k) |
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| 227 | !! t-level: dept_1d = dep(k+0.5) |
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| 228 | !! The scale factors are the discrete derivative of the depth: |
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| 229 | !! e3w_1d(jk) = dk[ dept_1d ] |
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| 230 | !! e3t_1d(jk) = dk[ depw_1d ] |
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| 231 | !! |
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| 232 | !! === Here constant vertical resolution === |
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| 233 | !! |
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| 234 | !! ** Action : - pdept_1d, pdepw_1d : depth of T- and W-point (m) |
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| 235 | !! - pe3t_1d , pe3w_1d : scale factors at T- and W-levels (m) |
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| 236 | !!---------------------------------------------------------------------- |
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| 237 | REAL(wp), DIMENSION(:), INTENT(out) :: pdept_1d, pdepw_1d ! 1D grid-point depth [m] |
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| 238 | REAL(wp), DIMENSION(:), INTENT(out) :: pe3t_1d , pe3w_1d ! 1D vertical scale factors [m] |
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| 239 | ! |
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| 240 | INTEGER :: jk ! dummy loop indices |
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| 241 | REAL(wp) :: zt, zw ! local scalar |
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| 242 | !!---------------------------------------------------------------------- |
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| 243 | ! |
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| 244 | IF(lwp) THEN ! Parameter print |
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| 245 | WRITE(numout,*) |
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| 246 | WRITE(numout,*) ' zgr_z1d : Reference vertical z-coordinates: uniform dz = ', rn_dz |
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| 247 | WRITE(numout,*) ' ~~~~~~~' |
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| 248 | ENDIF |
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| 249 | ! |
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| 250 | ! Reference z-coordinate (depth - scale factor at T- and W-points) ! Madec & Imbard 1996 function |
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| 251 | ! ---------------------- |
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| 252 | DO jk = 1, jpk |
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| 253 | zw = REAL( jk , wp ) |
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| 254 | zt = REAL( jk , wp ) + 0.5_wp |
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| 255 | pdepw_1d(jk) = rn_dz * REAL( jk-1 , wp ) |
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| 256 | pdept_1d(jk) = rn_dz * ( REAL( jk-1 , wp ) + 0.5_wp ) |
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| 257 | pe3w_1d (jk) = rn_dz |
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| 258 | pe3t_1d (jk) = rn_dz |
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| 259 | END DO |
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| 260 | ! |
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| 261 | IF(lwp) THEN ! control print |
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| 262 | WRITE(numout,*) |
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| 263 | WRITE(numout,*) ' Reference 1D z-coordinate depth and scale factors:' |
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| 264 | WRITE(numout, "(9x,' level gdept_1d gdepw_1d e3t_1d e3w_1d ')" ) |
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| 265 | WRITE(numout, "(10x, i4, 4f9.2)" ) ( jk, pdept_1d(jk), pdepw_1d(jk), pe3t_1d(jk), pe3w_1d(jk), jk = 1, jpk ) |
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| 266 | ENDIF |
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| 267 | ! |
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| 268 | END SUBROUTINE zgr_z1d |
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| 269 | |
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| 270 | !!====================================================================== |
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| 271 | END MODULE usrdef_zgr |
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