| 1 | MODULE gridrandom |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE gridrandom *** |
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| 4 | !! |
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| 5 | !! NEMOVAR: Construct gridded random noise fields |
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| 6 | !!====================================================================== |
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| 7 | !!---------------------------------------------------------------------- |
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| 8 | !! grid_2d_ran : Fill a 2D array with uncorrelated Gaussian noise |
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| 9 | !! using a constant seed |
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| 10 | !! grid_3d_ran : Fill a 3D array with uncorrelated Gaussian noise |
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| 11 | !! using a constant seed |
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| 12 | !! grid_2d_ran_2d : Fill a 2D array with uncorrelated Gaussian noise |
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| 13 | !! using a 2D seed array (for MPP) |
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| 14 | !! grid_3d_ran_2d : Fill a 3D array with uncorrelated Gaussian noise |
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| 15 | !! using a 2D seed array (for MPP) |
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| 16 | !! grid_write_seed : Write out the 2D seed array for the random number |
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| 17 | !! generator |
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| 18 | !!---------------------------------------------------------------------- |
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| 19 | !! * Modules used |
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| 20 | USE par_kind ! Kind variables |
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| 21 | USE dom_oce ! Domain variables |
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| 22 | USE in_out_manager ! I/O stuff |
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| 23 | USE iom ! I/O manager |
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| 24 | USE ran_num ! Random number routines |
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| 25 | USE lbclnk ! Boundary conditions and halos |
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| 26 | |
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| 27 | IMPLICIT NONE |
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| 28 | |
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| 29 | INTERFACE grid_random |
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| 30 | MODULE PROCEDURE grid_2d_ran, grid_3d_ran, & |
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| 31 | & grid_2d_ran_2d, grid_3d_ran_2d |
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| 32 | END INTERFACE |
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| 33 | |
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| 34 | INTERFACE grid_rd_sd |
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| 35 | MODULE PROCEDURE grid_2d_rd_sd_loc, & |
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| 36 | & grid_3d_rd_sd_loc |
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| 37 | END INTERFACE |
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| 38 | |
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| 39 | !! * Routine accessibility |
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| 40 | PRIVATE |
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| 41 | |
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| 42 | PUBLIC & |
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| 43 | & grid_random, & |
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| 44 | & grid_write_seed, & |
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| 45 | & grid_rd_sd |
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| 46 | |
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| 47 | CONTAINS |
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| 48 | |
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| 49 | SUBROUTINE grid_2d_ran( kseed, pt2d, cd_type, pmean, pstd ) |
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| 50 | !!---------------------------------------------------------------------- |
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| 51 | !! *** ROUTINE grid_2d_ran *** |
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| 52 | !! |
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| 53 | !! ** Purpose : Fill a 2D (surface) array with uncorrelated Gaussian |
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| 54 | !! noise. |
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| 55 | !! |
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| 56 | !! ** Method : The value of kseed is the seed for the random number |
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| 57 | !! generator. On the first call to "grid_2d_ran" it should |
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| 58 | !! be set to a large negative number. |
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| 59 | !! |
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| 60 | !! Apply the appropriate grid-point mask and lateral |
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| 61 | !! boundary conditions before exiting. |
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| 62 | !! |
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| 63 | !! ** Action : |
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| 64 | !! |
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| 65 | !! References : |
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| 66 | !! |
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| 67 | !! History : |
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| 68 | !! ! 07-11 (A. Weaver) |
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| 69 | !!---------------------------------------------------------------------- |
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| 70 | !! * Modules used |
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| 71 | |
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| 72 | !! * Arguments |
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| 73 | INTEGER, INTENT(INOUT) :: & |
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| 74 | & kseed ! Seed for random number generator |
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| 75 | REAL, INTENT(INOUT), DIMENSION(jpi,jpj) :: & |
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| 76 | & pt2d ! 2D field |
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| 77 | REAL(wp), INTENT(IN) :: & |
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| 78 | & pmean, & ! Mean of noise |
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| 79 | & pstd ! Standard deviation of noise |
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| 80 | |
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| 81 | !! * Local declarations |
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| 82 | CHARACTER(LEN=1), INTENT(IN) :: & |
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| 83 | & cd_type ! Nature of pt2d grid-point |
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| 84 | ! = T , U or V grid-point |
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| 85 | INTEGER :: & |
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| 86 | & ji, & |
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| 87 | & jj |
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| 88 | |
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| 89 | !-------------------------------------------------------------------- |
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| 90 | ! Fill in the 2D field with Gaussian noise |
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| 91 | !-------------------------------------------------------------------- |
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| 92 | |
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| 93 | DO jj = 1, jpj |
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| 94 | DO ji = 1, jpi |
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| 95 | pt2d(ji,jj) = gaustb( kseed, pstd, pmean ) |
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| 96 | END DO |
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| 97 | END DO |
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| 98 | |
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| 99 | !-------------------------------------------------------------------- |
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| 100 | ! Apply masks and lateral boundary conditions |
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| 101 | !-------------------------------------------------------------------- |
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| 102 | |
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| 103 | IF ( cd_type == 'T' ) THEN |
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| 104 | |
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| 105 | pt2d(:,:) = pt2d(:,:) * tmask(:,:,1) |
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| 106 | CALL lbc_lnk( pt2d, 'T', 1.0 ) |
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| 107 | |
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| 108 | ELSEIF ( cd_type == 'U' ) THEN |
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| 109 | |
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| 110 | pt2d(:,:) = pt2d(:,:) * umask(:,:,1) |
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| 111 | CALL lbc_lnk( pt2d, 'U', -1.0 ) |
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| 112 | |
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| 113 | ELSEIF ( cd_type == 'V' ) THEN |
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| 114 | |
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| 115 | pt2d(:,:) = pt2d(:,:) * vmask(:,:,1) |
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| 116 | CALL lbc_lnk( pt2d, 'V', -1.0 ) |
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| 117 | |
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| 118 | ENDIF |
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| 119 | |
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| 120 | END SUBROUTINE grid_2d_ran |
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| 121 | |
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| 122 | SUBROUTINE grid_3d_ran( kseed, pt3d, cd_type, pmean, pstd ) |
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| 123 | !!---------------------------------------------------------------------- |
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| 124 | !! *** ROUTINE grid_3d_ran *** |
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| 125 | !! |
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| 126 | !! ** Purpose : Fill a 3D array with uncorrelated Gaussian noise. |
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| 127 | !! |
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| 128 | !! ** Method : The value of kseed is the seed for the random number |
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| 129 | !! generator. On the first call to "grid_3d_ran" it should |
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| 130 | !! be set to a large negative number. |
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| 131 | !! |
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| 132 | !! Apply the appropriate grid-point mask and lateral |
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| 133 | !! boundary conditions before exiting. |
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| 134 | !! |
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| 135 | !! ** Action : |
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| 136 | !! |
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| 137 | !! References : |
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| 138 | !! |
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| 139 | !! History : |
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| 140 | !! ! 07-11 (A. Weaver) |
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| 141 | !!---------------------------------------------------------------------- |
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| 142 | !! * Modules used |
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| 143 | |
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| 144 | !! * Arguments |
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| 145 | INTEGER, INTENT(INOUT) :: & |
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| 146 | & kseed ! Seed for random number generator |
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| 147 | REAL, INTENT(INOUT), DIMENSION(jpi,jpj,jpk) :: & |
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| 148 | & pt3d ! 3D field |
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| 149 | REAL(wp), INTENT(IN) :: & |
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| 150 | & pmean, & ! Mean of noise |
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| 151 | & pstd ! Standard deviation of noise |
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| 152 | |
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| 153 | !! * Local declarations |
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| 154 | CHARACTER(LEN=1), INTENT(IN) :: & |
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| 155 | & cd_type ! Nature of pt3d grid-point |
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| 156 | ! = T , U or V grid-point |
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| 157 | INTEGER :: & |
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| 158 | & ji, & |
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| 159 | & jj, & |
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| 160 | & jk |
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| 161 | |
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| 162 | !-------------------------------------------------------------------- |
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| 163 | ! Fill in the 3D field with Gaussian noise |
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| 164 | !-------------------------------------------------------------------- |
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| 165 | |
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| 166 | DO jk = 1, jpk |
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| 167 | DO jj = 1, jpj |
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| 168 | DO ji = 1, jpi |
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| 169 | pt3d(ji,jj,jk) = gaustb( kseed, pstd, pmean ) |
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| 170 | END DO |
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| 171 | END DO |
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| 172 | END DO |
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| 173 | |
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| 174 | !-------------------------------------------------------------------- |
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| 175 | ! Apply masks and lateral boundary conditions |
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| 176 | !-------------------------------------------------------------------- |
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| 177 | |
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| 178 | IF ( cd_type == 'T' ) THEN |
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| 179 | |
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| 180 | pt3d(:,:,:) = pt3d(:,:,:) * tmask(:,:,:) |
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| 181 | CALL lbc_lnk( pt3d, 'T', 1.0 ) |
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| 182 | |
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| 183 | ELSEIF ( cd_type == 'U' ) THEN |
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| 184 | |
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| 185 | pt3d(:,:,:) = pt3d(:,:,:) * umask(:,:,:) |
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| 186 | CALL lbc_lnk( pt3d, 'U', -1.0 ) |
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| 187 | |
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| 188 | ELSEIF ( cd_type == 'V' ) THEN |
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| 189 | |
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| 190 | pt3d(:,:,:) = pt3d(:,:,:) * vmask(:,:,:) |
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| 191 | CALL lbc_lnk( pt3d, 'V', -1.0 ) |
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| 192 | |
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| 193 | ENDIF |
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| 194 | |
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| 195 | END SUBROUTINE grid_3d_ran |
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| 196 | |
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| 197 | SUBROUTINE grid_2d_ran_2d( kseed, pt2d, cd_type, pmean, pstd ) |
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| 198 | !!---------------------------------------------------------------------- |
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| 199 | !! *** ROUTINE grid_2d_ran_2d *** |
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| 200 | !! |
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| 201 | !! ** Purpose : Fill a 2D (surface) array with uncorrelated Gaussian |
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| 202 | !! noise. |
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| 203 | !! |
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| 204 | !! ** Method : The value of kseed is the seed for the random number |
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| 205 | !! generator. On the first call to "grid_2d_ran_2d" it |
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| 206 | !! should be set to a large negative number. |
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| 207 | !! |
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| 208 | !! This version has a 2D seed array to allow reproducible |
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| 209 | !! results for parallel execution. |
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| 210 | !! |
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| 211 | !! The kseed array should be be initialized with a MPP |
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| 212 | !! independent way. The mig, mjg values of each grid point |
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| 213 | !! can be used. |
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| 214 | !! |
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| 215 | !! Apply the appropriate grid-point mask and lateral |
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| 216 | !! boundary conditions before exiting. |
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| 217 | !! |
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| 218 | !! ** Action : |
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| 219 | !! |
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| 220 | !! References : |
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| 221 | !! |
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| 222 | !! History : |
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| 223 | !! ! 07-07 (K. Mogensen) NEMOVAR version |
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| 224 | !! ! 07-11 (A. Weaver) Treat one array only |
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| 225 | !!---------------------------------------------------------------------- |
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| 226 | !! * Modules used |
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| 227 | |
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| 228 | !! * Arguments |
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| 229 | INTEGER, INTENT(INOUT), DIMENSION(jpi,jpj) :: & |
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| 230 | & kseed ! Seed for random number generator |
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| 231 | REAL, INTENT(INOUT), DIMENSION(jpi,jpj) :: & |
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| 232 | & pt2d ! 2D field |
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| 233 | REAL(wp), INTENT(IN) :: & |
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| 234 | & pmean, & ! Mean of noise |
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| 235 | & pstd ! Standard deviation of noise |
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| 236 | |
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| 237 | !! * Local declarations |
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| 238 | CHARACTER(LEN=1), INTENT(IN) :: & |
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| 239 | & cd_type ! Nature of pt2d grid-point |
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| 240 | ! = T , U or V grid-point |
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| 241 | INTEGER :: & |
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| 242 | & ji, & |
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| 243 | & jj |
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| 244 | |
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| 245 | !-------------------------------------------------------------------- |
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| 246 | ! Fill in the 2D field with Gaussian noise |
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| 247 | !-------------------------------------------------------------------- |
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| 248 | |
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| 249 | DO jj = 1, jpj |
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| 250 | DO ji = 1, jpi |
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| 251 | pt2d(ji,jj) = gaustb_2d( ji, jj, kseed, pstd, pmean ) |
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| 252 | END DO |
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| 253 | END DO |
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| 254 | |
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| 255 | !-------------------------------------------------------------------- |
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| 256 | ! Apply masks and lateral boundary conditions |
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| 257 | !-------------------------------------------------------------------- |
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| 258 | |
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| 259 | IF ( cd_type == 'T' ) THEN |
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| 260 | |
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| 261 | pt2d(:,:) = pt2d(:,:) * tmask(:,:,1) |
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| 262 | CALL lbc_lnk( pt2d, 'T', 1.0 ) |
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| 263 | |
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| 264 | ELSEIF ( cd_type == 'U' ) THEN |
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| 265 | |
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| 266 | pt2d(:,:) = pt2d(:,:) * umask(:,:,1) |
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| 267 | CALL lbc_lnk( pt2d, 'U', -1.0 ) |
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| 268 | |
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| 269 | ELSEIF ( cd_type == 'V' ) THEN |
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| 270 | |
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| 271 | pt2d(:,:) = pt2d(:,:) * vmask(:,:,1) |
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| 272 | CALL lbc_lnk( pt2d, 'V', -1.0 ) |
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| 273 | |
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| 274 | ENDIF |
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| 275 | |
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| 276 | END SUBROUTINE grid_2d_ran_2d |
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| 277 | |
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| 278 | SUBROUTINE grid_3d_ran_2d( kseed, pt3d, cd_type, pmean, pstd ) |
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| 279 | !!---------------------------------------------------------------------- |
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| 280 | !! *** ROUTINE grid_3d_ran_2d *** |
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| 281 | !! |
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| 282 | !! ** Purpose : Fill a 3D array with uncorrelated Gaussian noise. |
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| 283 | !! |
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| 284 | !! ** Method : The value of kseed is the seed for the random number |
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| 285 | !! generator. On the first call to "grid_3d_ran_2d" it |
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| 286 | !! should be set to a large negative number. |
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| 287 | !! |
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| 288 | !! This version has a 2D seed array to allow reproducible |
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| 289 | !! results for parallel execution. |
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| 290 | !! |
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| 291 | !! The kseed array should be be initialized with a MPP |
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| 292 | !! independent way. The mig, mjg values of each grid point |
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| 293 | !! can be used. |
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| 294 | !! |
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| 295 | !! Apply the appropriate grid-point mask and lateral |
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| 296 | !! boundary conditions before exiting. |
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| 297 | !! |
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| 298 | !! ** Action : |
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| 299 | !! |
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| 300 | !! References : |
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| 301 | !! |
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| 302 | !! History : |
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| 303 | !! ! 07-07 (K. Mogensen) NEMOVAR version |
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| 304 | !! ! 07-11 (A. Weaver) Treat one array only |
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| 305 | !!---------------------------------------------------------------------- |
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| 306 | !! * Modules used |
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| 307 | |
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| 308 | !! * Arguments |
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| 309 | INTEGER, INTENT(INOUT), DIMENSION(jpi,jpj) :: & |
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| 310 | & kseed ! Seed for random number generator |
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| 311 | REAL, INTENT(INOUT), DIMENSION(jpi,jpj,jpk) :: & |
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| 312 | & pt3d ! 3D field |
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| 313 | REAL(wp), INTENT(IN) :: & |
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| 314 | & pmean, & ! Mean of noise |
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| 315 | & pstd ! Standard deviation of noise |
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| 316 | |
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| 317 | !! * Local declarations |
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| 318 | CHARACTER(LEN=1), INTENT(IN) :: & |
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| 319 | & cd_type ! Nature of pt3d grid-point |
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| 320 | ! = T , U or V grid-point |
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| 321 | INTEGER :: & |
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| 322 | & ji, & |
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| 323 | & jj, & |
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| 324 | & jk |
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| 325 | |
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| 326 | !-------------------------------------------------------------------- |
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| 327 | ! Fill in the 3D field with Gaussian noise |
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| 328 | !-------------------------------------------------------------------- |
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| 329 | |
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| 330 | DO jk = 1, jpk |
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| 331 | DO jj = 1, jpj |
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| 332 | DO ji = 1, jpi |
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| 333 | pt3d(ji,jj,jk) = gaustb_2d( ji, jj, kseed, pstd, pmean ) |
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| 334 | END DO |
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| 335 | END DO |
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| 336 | END DO |
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| 337 | |
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| 338 | !-------------------------------------------------------------------- |
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| 339 | ! Apply masks and lateral boundary conditions |
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| 340 | !-------------------------------------------------------------------- |
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| 341 | |
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| 342 | IF ( cd_type == 'T' ) THEN |
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| 343 | |
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| 344 | pt3d(:,:,:) = pt3d(:,:,:) * tmask(:,:,:) |
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| 345 | CALL lbc_lnk( pt3d, 'T', 1.0 ) |
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| 346 | |
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| 347 | ELSEIF ( cd_type == 'U' ) THEN |
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| 348 | |
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| 349 | pt3d(:,:,:) = pt3d(:,:,:) * umask(:,:,:) |
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| 350 | CALL lbc_lnk( pt3d, 'U', -1.0 ) |
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| 351 | |
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| 352 | ELSEIF ( cd_type == 'V' ) THEN |
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| 353 | |
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| 354 | pt3d(:,:,:) = pt3d(:,:,:) * vmask(:,:,:) |
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| 355 | CALL lbc_lnk( pt3d, 'V', -1.0 ) |
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| 356 | |
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| 357 | ENDIF |
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| 358 | |
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| 359 | END SUBROUTINE grid_3d_ran_2d |
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| 360 | |
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| 361 | SUBROUTINE grid_write_seed( cdfilename, kseed ) |
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| 362 | !!---------------------------------------------------------------------- |
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| 363 | !! *** ROUTINE grid_write_seed *** |
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| 364 | !! |
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| 365 | !! ** Purpose : Write output 2d seed array |
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| 366 | !! |
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| 367 | !! ** Method : IOM |
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| 368 | !! |
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| 369 | !! ** Action : |
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| 370 | !! |
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| 371 | !! References : |
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| 372 | !! |
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| 373 | !! History : |
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| 374 | !! ! 07-07 (K. Mogensen) Original code based on iniwrk.F |
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| 375 | !!---------------------------------------------------------------------- |
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| 376 | !! * Modules used |
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| 377 | !! * Arguments |
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| 378 | CHARACTER(LEN=*), INTENT(IN) :: & |
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| 379 | & cdfilename ! File to be written |
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| 380 | INTEGER, INTENT(IN), DIMENSION(jpi,jpj) :: & |
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| 381 | & kseed ! Seed array |
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| 382 | !! * Local declarations |
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| 383 | INTEGER :: & |
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| 384 | & inum |
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| 385 | |
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| 386 | ! Open the file |
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| 387 | |
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| 388 | CALL iom_open( TRIM(cdfilename), inum, ldwrt = .TRUE., kiolib = jprstlib) |
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| 389 | |
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| 390 | ! Write the seed |
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| 391 | |
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| 392 | CALL iom_rstput( 0, 0, inum, 'seed' , REAL(kseed) ) |
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| 393 | |
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| 394 | ! Close the file |
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| 395 | |
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| 396 | CALL iom_close( inum ) |
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| 397 | |
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| 398 | END SUBROUTINE grid_write_seed |
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| 399 | |
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| 400 | SUBROUTINE grid_2d_rd_sd_loc( kseed, pt2d, cd_type, pmean, pstd ) |
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| 401 | !!---------------------------------------------------------------------- |
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| 402 | !! *** ROUTINE grid_2d_rd_sd *** |
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| 403 | !! |
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| 404 | !! ** Purpose : Fill a 2D (surface) array with uncorrelated Gaussian |
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| 405 | !! noise. |
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| 406 | !! |
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| 407 | !! ** Method : The value of kseed is an integer from which a seed is |
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| 408 | !! generated for the random number |
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| 409 | !! and then call grid_random routine |
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| 410 | !! |
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| 411 | !! Apply the appropriate grid-point mask and lateral |
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| 412 | !! boundary conditions before exiting. |
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| 413 | !! |
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| 414 | !! ** Action : |
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| 415 | !! |
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| 416 | !! References : |
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| 417 | !! |
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| 418 | !! History : |
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| 419 | !! ! 09-07 (F. Vigilant) |
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| 420 | !!---------------------------------------------------------------------- |
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| 421 | !! * Modules used |
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| 422 | USE par_oce , ONLY: & ! Ocean space and time domain variables |
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| 423 | & jpiglo |
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| 424 | !! * Arguments |
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| 425 | INTEGER, INTENT(IN) :: & |
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| 426 | & kseed ! Seed for random number generator |
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| 427 | REAL, INTENT(INOUT), DIMENSION(jpi,jpj) :: & |
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| 428 | & pt2d ! 2D field |
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| 429 | REAL(wp), INTENT(IN) :: & |
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| 430 | & pmean, & ! Mean of noise |
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| 431 | & pstd ! Standard deviation of noise |
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| 432 | |
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| 433 | !! * Local declarations |
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| 434 | CHARACTER(LEN=1), INTENT(IN) :: & |
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| 435 | & cd_type ! Nature of pt2d grid-point |
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| 436 | ! = T , U or V grid-point |
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| 437 | INTEGER, DIMENSION(jpi,jpj) :: & |
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| 438 | & iseed_2d ! 2D seed for the random number generator |
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| 439 | INTEGER :: & |
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| 440 | & ji, & |
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| 441 | & jj |
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| 442 | |
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| 443 | !-------------------------------------------------------------------- |
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| 444 | ! Generate the seed |
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| 445 | !-------------------------------------------------------------------- |
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| 446 | DO jj = 1, jpj |
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| 447 | DO ji = 1, jpi |
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| 448 | iseed_2d(ji,jj) = - ( kseed + & |
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| 449 | & mig(ji) + ( mjg(jj) - 1 ) * jpiglo ) |
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| 450 | END DO |
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| 451 | END DO |
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| 452 | |
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| 453 | !-------------------------------------------------------------------- |
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| 454 | ! Generate the noise |
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| 455 | !-------------------------------------------------------------------- |
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| 456 | CALL grid_random( iseed_2d, pt2d, cd_type, pmean, pstd ) |
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| 457 | |
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| 458 | END SUBROUTINE grid_2d_rd_sd_loc |
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| 459 | |
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| 460 | SUBROUTINE grid_3d_rd_sd_loc( kseed, pt3d, cd_type, pmean, pstd ) |
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| 461 | !!---------------------------------------------------------------------- |
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| 462 | !! *** ROUTINE grid_3d_rd_sd *** |
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| 463 | !! |
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| 464 | !! ** Purpose : Fill a 3D array with uncorrelated Gaussian |
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| 465 | !! noise. |
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| 466 | !! |
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| 467 | !! ** Method : The value of kseed is an integer from which a seed is |
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| 468 | !! generated for the random number |
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| 469 | !! and then call grid_random routine |
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| 470 | !! |
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| 471 | !! Apply the appropriate grid-point mask and lateral |
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| 472 | !! boundary conditions before exiting. |
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| 473 | !! |
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| 474 | !! ** Action : |
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| 475 | !! |
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| 476 | !! References : |
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| 477 | !! |
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| 478 | !! History : |
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| 479 | !! ! 09-07 (F. Vigilant) |
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| 480 | !!---------------------------------------------------------------------- |
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| 481 | !! * Modules used |
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| 482 | USE par_oce , ONLY: & ! Ocean space and time domain variables |
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| 483 | & jpiglo |
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| 484 | !! * Arguments |
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| 485 | INTEGER, INTENT(IN) :: & |
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| 486 | & kseed ! Seed for random number generator |
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| 487 | REAL, INTENT(INOUT), DIMENSION(jpi,jpj,jpk) :: & |
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| 488 | & pt3d ! 3D field |
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| 489 | REAL(wp), INTENT(IN) :: & |
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| 490 | & pmean, & ! Mean of noise |
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| 491 | & pstd ! Standard deviation of noise |
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| 492 | |
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| 493 | !! * Local declarations |
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| 494 | CHARACTER(LEN=1), INTENT(IN) :: & |
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| 495 | & cd_type ! Nature of pt2d grid-point |
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| 496 | ! = T , U or V grid-point |
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| 497 | INTEGER, DIMENSION(jpi,jpj) :: & |
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| 498 | & iseed_2d ! 2D seed for the random number generator |
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| 499 | INTEGER :: & |
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| 500 | & ji, & |
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| 501 | & jj |
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| 502 | |
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| 503 | !-------------------------------------------------------------------- |
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| 504 | ! Generate the seed |
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| 505 | !-------------------------------------------------------------------- |
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| 506 | DO jj = 1, jpj |
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| 507 | DO ji = 1, jpi |
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| 508 | iseed_2d(ji,jj) = - ( kseed + & |
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| 509 | & mig(ji) + ( mjg(jj) - 1 ) * jpiglo ) |
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| 510 | END DO |
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| 511 | END DO |
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| 512 | |
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| 513 | !-------------------------------------------------------------------- |
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| 514 | ! Generate the noise |
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| 515 | !-------------------------------------------------------------------- |
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| 516 | CALL grid_random( iseed_2d, pt3d, cd_type, pmean, pstd ) |
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| 517 | |
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| 518 | END SUBROUTINE grid_3d_rd_sd_loc |
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| 519 | |
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| 520 | |
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| 521 | END MODULE gridrandom |
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