[13562] | 1 | MODULE usrdef_hgr |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE usrdef_hgr *** |
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| 4 | !! |
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| 5 | !! === AM98 configuration === |
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| 6 | !! |
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| 7 | !! User defined : mesh and Coriolis parameter of a user configuration |
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| 8 | !!====================================================================== |
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| 9 | !! History : 4.0 ! 2016-03 (S. Flavoni) |
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| 10 | !!---------------------------------------------------------------------- |
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| 11 | |
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| 12 | !!---------------------------------------------------------------------- |
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| 13 | !! usr_def_hgr : initialize the horizontal mesh |
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| 14 | !!---------------------------------------------------------------------- |
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| 15 | USE dom_oce , ONLY: nimpp, njmpp ! ocean space and time domain |
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| 16 | USE par_oce ! ocean space and time domain |
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| 17 | USE phycst ! physical constants |
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| 18 | USE usrdef_nam ! |
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| 19 | ! |
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| 20 | USE in_out_manager ! I/O manager |
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| 21 | USE lib_mpp ! MPP library |
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| 22 | |
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| 23 | IMPLICIT NONE |
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| 24 | PRIVATE |
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| 25 | |
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| 26 | PUBLIC usr_def_hgr ! called in domhgr.F90 |
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| 27 | |
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| 28 | !!---------------------------------------------------------------------- |
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| 29 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
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| 30 | !! $Id: usrdef_hgr.F90 10069 2018-08-28 14:12:24Z nicolasmartin $ |
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| 31 | !! Software governed by the CeCILL license (see ./LICENSE) |
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| 32 | !!---------------------------------------------------------------------- |
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| 33 | CONTAINS |
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| 34 | |
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| 35 | SUBROUTINE usr_def_hgr( plamt , plamu , plamv , plamf , & ! geographic position (required) |
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| 36 | & pphit , pphiu , pphiv , pphif , & ! |
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| 37 | & kff , pff_f , pff_t , & ! Coriolis parameter (if domain not on the sphere) |
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| 38 | & pe1t , pe1u , pe1v , pe1f , & ! scale factors (required) |
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| 39 | & pe2t , pe2u , pe2v , pe2f , & ! |
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| 40 | & ke1e2u_v , pe1e2u , pe1e2v ) ! u- & v-surfaces (if gridsize reduction is used in strait(s)) |
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| 41 | !!---------------------------------------------------------------------- |
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| 42 | !! *** ROUTINE usr_def_hgr *** |
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| 43 | !! |
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| 44 | !! ** Purpose : user defined mesh and Coriolis parameter |
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| 45 | !! |
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| 46 | !! ** Method : set all intent(out) argument to a proper value |
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| 47 | !! |
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| 48 | !! Here AM98 configuration : |
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| 49 | !! Rectangular mid-latitude domain |
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| 50 | !! - with axes rotated by 45 degrees |
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| 51 | !! - a constant horizontal resolution of 106 km |
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| 52 | !! - on a beta-plane |
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| 53 | !! |
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| 54 | !! ** Action : - define longitude & latitude of t-, u-, v- and f-points (in degrees) |
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| 55 | !! - define coriolis parameter at f-point if the domain in not on the sphere (on beta-plane) |
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| 56 | !! - define i- & j-scale factors at t-, u-, v- and f-points (in meters) |
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| 57 | !! - define u- & v-surfaces (if gridsize reduction is used in some straits) (in m2) |
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| 58 | !!---------------------------------------------------------------------- |
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| 59 | REAL(wp), DIMENSION(:,:), INTENT(out) :: plamt, plamu, plamv, plamf ! longitude outputs [degrees] |
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| 60 | REAL(wp), DIMENSION(:,:), INTENT(out) :: pphit, pphiu, pphiv, pphif ! latitude outputs [degrees] |
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| 61 | INTEGER , INTENT(out) :: kff ! =1 Coriolis parameter computed here, =0 otherwise |
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| 62 | REAL(wp), DIMENSION(:,:), INTENT(out) :: pff_f, pff_t ! Coriolis factor at f-point [1/s] |
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| 63 | REAL(wp), DIMENSION(:,:), INTENT(out) :: pe1t, pe1u, pe1v, pe1f ! i-scale factors [m] |
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| 64 | REAL(wp), DIMENSION(:,:), INTENT(out) :: pe2t, pe2u, pe2v, pe2f ! j-scale factors [m] |
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| 65 | INTEGER , INTENT(out) :: ke1e2u_v ! =1 u- & v-surfaces computed here, =0 otherwise |
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| 66 | REAL(wp), DIMENSION(:,:), INTENT(out) :: pe1e2u, pe1e2v ! u- & v-surfaces (if reduction in strait) [m2] |
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| 67 | ! |
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| 68 | INTEGER :: ji, jj ! dummy loop indices |
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| 69 | REAL(wp) :: zlam1, zlam0, zcos_theta, zim1 , zjm1 , ze1 , ze1deg ! local scalars |
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| 70 | REAL(wp) :: zphi1, zphi0, zsin_theta, zim05, zjm05, znorme ! - - |
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| 71 | REAL(wp) :: zgl, zbl, z1d ! - - |
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| 72 | |
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| 73 | !!------------------------------------------------------------------------------- |
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| 74 | ! |
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| 75 | ! !== beta-plane with regular grid-spacing and rotated domain ==! (AM98 configuration) |
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| 76 | ! |
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| 77 | IF(lwp) WRITE(numout,*) |
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| 78 | IF(lwp) WRITE(numout,*) 'usr_def_hgr : AM98 configuration (beta-plane with rotated regular grid-spacing)' |
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| 79 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~' |
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| 80 | ! |
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| 81 | ! |
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| 82 | ! !== grid point position ==! |
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| 83 | ! |
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| 84 | ze1 = rn_dx / REAL(nn_AM98, wp) ! [m] gridspacing used |
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| 85 | zgl = rn_domsiz + 2._wp * REAL(nn_gc, wp) * ze1 ! [m] length of the square with ghostcells |
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| 86 | ! fit the best square around the square + ghost cells |
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| 87 | zbl = zgl * ( COS( rn_theta * rad ) + SIN( rn_theta * rad ) ) ! length side bigger domain [m] |
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| 88 | ! |
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| 89 | zcos_theta = COS( rn_theta * rad) |
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| 90 | zsin_theta = SIN( rn_theta * rad) |
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| 91 | ! Translation vers le coin bas-gauche du carré tourné |
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| 92 | zlam1 = zbl * COS((rn_theta + 45. )* rad ) / SQRT( 2._wp ) - rn_domsiz/2._wp |
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| 93 | zphi1 = zbl * SIN((rn_theta + 45. )* rad ) / SQRT( 2._wp ) - rn_domsiz/2._wp |
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| 94 | ! select the nearest integer coordonate point |
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| 95 | zlam0 = REAL( anint( zlam1 / (ze1 * zcos_theta) ), wp ) * ze1 * zcos_theta |
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| 96 | zphi0 = REAl( anint( zphi1 / (ze1 * zcos_theta) ), wp ) * ze1 * zcos_theta |
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| 97 | ! |
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| 98 | ! zlam0 = REAL( anint( zlam1 / ze1 ), wp ) * ze1 |
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| 99 | ! zphi0 = REAl( anint( zphi1 / ze1 ), wp ) * ze1 |
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| 100 | ! |
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| 101 | IF(lwp) WRITE(numout,*) ' origin position zlam0 = ', zlam0/1000, ' km' |
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| 102 | IF(lwp) WRITE(numout,*) ' origin position zphi0 = ', zphi0/1000, ' km' |
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| 103 | ! O1M = OM x rotation_theta - OO1 |
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| 104 | ! zim1, zim05, zjm1, zjm05 fit for 2 ghost cells on each side |
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| 105 | DO jj = 1, jpj |
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| 106 | DO ji = 1, jpi |
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| 107 | zim1 = REAL( ji + nimpp - 1 ) ; zim05 = REAL( ji + nimpp - 1 ) - 0.5 |
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| 108 | zjm1 = REAL( jj + njmpp - 1 ) ; zjm05 = REAL( jj + njmpp - 1 ) - 0.5 |
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| 109 | ! |
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| 110 | !glamt(i,j) position (meters) at T-point |
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| 111 | !gphit(i,j) position (meters) at T-point |
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| 112 | plamt(ji,jj) = zim05 * ze1 * zcos_theta - zjm05 * ze1 * zsin_theta - zlam0 |
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| 113 | pphit(ji,jj) = + zim05 * ze1 * zsin_theta + zjm05 * ze1 * zcos_theta - zphi0 |
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| 114 | ! |
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| 115 | !glamu(i,j) position (meters) at U-point |
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| 116 | !gphiu(i,j) position (meters) at U-point |
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| 117 | plamu(ji,jj) = zim1 * ze1 * zcos_theta - zjm05 * ze1 * zsin_theta - zlam0 |
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| 118 | pphiu(ji,jj) = + zim1 * ze1 * zsin_theta + zjm05 * ze1 * zcos_theta - zphi0 |
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| 119 | ! |
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| 120 | !glamv(i,j) position (meters) at V-point |
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| 121 | !gphiv(i,j) position (meters) at V-point |
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| 122 | plamv(ji,jj) = zim05 * ze1 * zcos_theta - zjm1 * ze1 * zsin_theta - zlam0 |
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| 123 | pphiv(ji,jj) = + zim05 * ze1 * zsin_theta + zjm1 * ze1 * zcos_theta - zphi0 |
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| 124 | ! |
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| 125 | !glamf(i,j) position (meters) at F-point |
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| 126 | !gphif(i,j) position (meters) at F-point |
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| 127 | plamf(ji,jj) = zim1 * ze1 * zcos_theta - zjm1 * ze1 * zsin_theta - zlam0 |
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| 128 | pphif(ji,jj) = + zim1 * ze1 * zsin_theta + zjm1 * ze1 * zcos_theta - zphi0 |
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| 129 | END DO |
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| 130 | END DO |
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| 131 | ! |
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| 132 | ! !== Horizontal scale factors ==! (in meters) |
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| 133 | ! |
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| 134 | ! ! constant grid spacing |
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| 135 | pe1t(:,:) = ze1 ; pe2t(:,:) = ze1 |
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| 136 | pe1u(:,:) = ze1 ; pe2u(:,:) = ze1 |
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| 137 | pe1v(:,:) = ze1 ; pe2v(:,:) = ze1 |
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| 138 | pe1f(:,:) = ze1 ; pe2f(:,:) = ze1 |
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| 139 | ! |
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| 140 | ! ! NO reduction of grid size in some straits |
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| 141 | ke1e2u_v = 0 ! ==>> u_ & v_surfaces will be computed in dom_ghr routine |
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| 142 | pe1e2u(:,:) = 0._wp ! CAUTION: set to zero to avoid error with some compilers that |
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| 143 | pe1e2v(:,:) = 0._wp ! require an initialization of INTENT(out) arguments |
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| 144 | ! |
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| 145 | ! |
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| 146 | ! !== Coriolis parameter ==! |
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| 147 | kff = 1 ! indicate not to compute ff afterward |
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| 148 | ! |
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| 149 | pff_f(:,:) = REAL( rn_f0, wp ) + REAL( rn_beta, wp ) * ABS( pphif(:,:) ) ! f = f0 +beta* y |
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| 150 | pff_t(:,:) = REAL( rn_f0, wp ) + REAL( rn_beta, wp ) * ABS( pphit(:,:) ) ! f = f0 +beta* y |
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| 151 | ! |
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| 152 | IF(lwp) WRITE(numout,*) ' beta-plane used. f0 = ', rn_f0 , ' 1/s' |
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| 153 | IF(lwp) WRITE(numout,*) ' beta-plane used. beta = ', rn_beta, ' 1/(s.m)' |
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| 154 | ! |
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| 155 | END SUBROUTINE usr_def_hgr |
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| 156 | |
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| 157 | !!====================================================================== |
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| 158 | END MODULE usrdef_hgr |
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