| 1 | SUBROUTINE surface_coupler |
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| 2 | |
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| 3 | !------------------------------------------------------------------------------! |
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| 4 | ! Current revisions: |
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| 5 | ! ----------------- |
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| 6 | ! |
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| 7 | ! |
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| 8 | ! Former revisions: |
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| 9 | ! ------------------ |
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| 10 | ! $Id: surface_coupler.f90 710 2011-03-30 09:45:27Z helmke $ |
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| 11 | ! |
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| 12 | ! 709 2011-03-30 09:31:40Z raasch |
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| 13 | ! formatting adjustments |
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| 14 | ! |
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| 15 | ! 667 2010-12-23 12:06:00Z suehring/gryschka |
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| 16 | ! Additional case for nonequivalent processor and grid topopolgy in ocean and |
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| 17 | ! atmosphere added (coupling_topology = 1). |
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| 18 | ! Added exchange of u and v from Ocean to Atmosphere |
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| 19 | ! |
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| 20 | ! 291 2009-04-16 12:07:26Z raasch |
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| 21 | ! Coupling with independent precursor runs. |
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| 22 | ! Output of messages replaced by message handling routine. |
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| 23 | ! |
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| 24 | ! 206 2008-10-13 14:59:11Z raasch |
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| 25 | ! Implementation of a MPI-1 Coupling: replaced myid with target_id, |
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| 26 | ! deleted __mpi2 directives |
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| 27 | ! |
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| 28 | ! 109 2007-08-28 15:26:47Z letzel |
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| 29 | ! Initial revision |
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| 30 | ! |
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| 31 | ! Description: |
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| 32 | ! ------------ |
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| 33 | ! Data exchange at the interface between coupled models |
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| 34 | !------------------------------------------------------------------------------! |
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| 35 | |
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| 36 | USE arrays_3d |
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| 37 | USE control_parameters |
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| 38 | USE cpulog |
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| 39 | USE grid_variables |
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| 40 | USE indices |
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| 41 | USE interfaces |
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| 42 | USE pegrid |
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| 43 | |
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| 44 | IMPLICIT NONE |
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| 45 | |
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| 46 | INTEGER :: i, j, k |
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| 47 | |
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| 48 | REAL :: time_since_reference_point_rem |
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| 49 | REAL :: total_2d(-nbgp:ny+nbgp,-nbgp:nx+nbgp) |
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| 50 | |
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| 51 | #if defined( __parallel ) |
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| 52 | |
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| 53 | CALL cpu_log( log_point(39), 'surface_coupler', 'start' ) |
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| 54 | |
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| 55 | |
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| 56 | |
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| 57 | ! |
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| 58 | !-- In case of model termination initiated by the remote model |
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| 59 | !-- (terminate_coupled_remote > 0), initiate termination of the local model. |
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| 60 | !-- The rest of the coupler must then be skipped because it would cause an MPI |
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| 61 | !-- intercomminucation hang. |
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| 62 | !-- If necessary, the coupler will be called at the beginning of the next |
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| 63 | !-- restart run. |
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| 64 | |
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| 65 | IF ( coupling_topology == 0 ) THEN |
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| 66 | CALL MPI_SENDRECV( terminate_coupled, 1, MPI_INTEGER, target_id, & |
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| 67 | 0, & |
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| 68 | terminate_coupled_remote, 1, MPI_INTEGER, target_id, & |
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| 69 | 0, comm_inter, status, ierr ) |
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| 70 | ELSE |
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| 71 | IF ( myid == 0) THEN |
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| 72 | CALL MPI_SENDRECV( terminate_coupled, 1, MPI_INTEGER, & |
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| 73 | target_id, 0, & |
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| 74 | terminate_coupled_remote, 1, MPI_INTEGER, & |
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| 75 | target_id, 0, & |
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| 76 | comm_inter, status, ierr ) |
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| 77 | ENDIF |
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| 78 | CALL MPI_BCAST( terminate_coupled_remote, 1, MPI_INTEGER, 0, comm2d, & |
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| 79 | ierr ) |
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| 80 | |
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| 81 | ALLOCATE( total_2d_a(-nbgp:ny_a+nbgp,-nbgp:nx_a+nbgp), & |
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| 82 | total_2d_o(-nbgp:ny_o+nbgp,-nbgp:nx_o+nbgp) ) |
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| 83 | |
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| 84 | ENDIF |
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| 85 | |
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| 86 | IF ( terminate_coupled_remote > 0 ) THEN |
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| 87 | WRITE( message_string, * ) 'remote model "', & |
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| 88 | TRIM( coupling_mode_remote ), & |
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| 89 | '" terminated', & |
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| 90 | '&with terminate_coupled_remote = ', & |
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| 91 | terminate_coupled_remote, & |
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| 92 | '&local model "', TRIM( coupling_mode ), & |
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| 93 | '" has', & |
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| 94 | '&terminate_coupled = ', & |
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| 95 | terminate_coupled |
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| 96 | CALL message( 'surface_coupler', 'PA0310', 1, 2, 0, 6, 0 ) |
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| 97 | RETURN |
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| 98 | ENDIF |
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| 99 | |
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| 100 | |
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| 101 | ! |
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| 102 | !-- Exchange the current simulated time between the models, |
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| 103 | !-- currently just for total_2ding |
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| 104 | IF ( coupling_topology == 0 ) THEN |
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| 105 | |
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| 106 | CALL MPI_SEND( time_since_reference_point, 1, MPI_REAL, target_id, 11, & |
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| 107 | comm_inter, ierr ) |
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| 108 | CALL MPI_RECV( time_since_reference_point_rem, 1, MPI_REAL, target_id, & |
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| 109 | 11, comm_inter, status, ierr ) |
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| 110 | ELSE |
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| 111 | |
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| 112 | IF ( myid == 0 ) THEN |
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| 113 | |
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| 114 | CALL MPI_SEND( time_since_reference_point, 1, MPI_REAL, target_id, & |
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| 115 | 11, comm_inter, ierr ) |
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| 116 | CALL MPI_RECV( time_since_reference_point_rem, 1, MPI_REAL, & |
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| 117 | target_id, 11, comm_inter, status, ierr ) |
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| 118 | |
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| 119 | ENDIF |
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| 120 | |
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| 121 | CALL MPI_BCAST( time_since_reference_point_rem, 1, MPI_REAL, 0, comm2d, & |
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| 122 | ierr ) |
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| 123 | |
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| 124 | ENDIF |
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| 125 | |
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| 126 | ! |
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| 127 | !-- Exchange the interface data |
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| 128 | IF ( coupling_mode == 'atmosphere_to_ocean' ) THEN |
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| 129 | |
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| 130 | ! |
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| 131 | !-- Horizontal grid size and number of processors is equal in ocean and |
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| 132 | !-- atmosphere |
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| 133 | IF ( coupling_topology == 0 ) THEN |
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| 134 | |
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| 135 | ! |
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| 136 | !-- Send heat flux at bottom surface to the ocean |
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| 137 | CALL MPI_SEND( shf(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 12, & |
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| 138 | comm_inter, ierr ) |
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| 139 | ! |
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| 140 | !-- Send humidity flux at bottom surface to the ocean |
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| 141 | IF ( humidity ) THEN |
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| 142 | CALL MPI_SEND( qsws(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 13, & |
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| 143 | comm_inter, ierr ) |
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| 144 | ENDIF |
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| 145 | ! |
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| 146 | !-- Receive temperature at the bottom surface from the ocean |
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| 147 | CALL MPI_RECV( pt(0,nysg,nxlg), 1, type_xy, target_id, 14, & |
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| 148 | comm_inter, status, ierr ) |
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| 149 | ! |
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| 150 | !-- Send the momentum flux (u) at bottom surface to the ocean |
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| 151 | CALL MPI_SEND( usws(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 15, & |
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| 152 | comm_inter, ierr ) |
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| 153 | ! |
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| 154 | !-- Send the momentum flux (v) at bottom surface to the ocean |
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| 155 | CALL MPI_SEND( vsws(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 16, & |
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| 156 | comm_inter, ierr ) |
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| 157 | ! |
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| 158 | !-- Receive u at the bottom surface from the ocean |
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| 159 | CALL MPI_RECV( u(0,nysg,nxlg), 1, type_xy, target_id, 17, & |
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| 160 | comm_inter, status, ierr ) |
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| 161 | ! |
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| 162 | !-- Receive v at the bottom surface from the ocean |
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| 163 | CALL MPI_RECV( v(0,nysg,nxlg), 1, type_xy, target_id, 18, & |
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| 164 | comm_inter, status, ierr ) |
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| 165 | ! |
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| 166 | !-- Horizontal grid size or number of processors differs between |
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| 167 | !-- ocean and atmosphere |
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| 168 | ELSE |
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| 169 | |
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| 170 | ! |
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| 171 | !-- Send heat flux at bottom surface to the ocean |
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| 172 | total_2d_a = 0.0 |
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| 173 | total_2d = 0.0 |
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| 174 | total_2d(nys:nyn,nxl:nxr) = shf(nys:nyn,nxl:nxr) |
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| 175 | |
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| 176 | CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, 0, & |
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| 177 | comm2d, ierr ) |
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| 178 | CALL interpolate_to_ocean( 12 ) |
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| 179 | ! |
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| 180 | !-- Send humidity flux at bottom surface to the ocean |
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| 181 | IF ( humidity ) THEN |
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| 182 | total_2d_a = 0.0 |
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| 183 | total_2d = 0.0 |
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| 184 | total_2d(nys:nyn,nxl:nxr) = qsws(nys:nyn,nxl:nxr) |
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| 185 | |
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| 186 | CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, & |
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| 187 | 0, comm2d, ierr ) |
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| 188 | CALL interpolate_to_ocean( 13 ) |
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| 189 | ENDIF |
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| 190 | ! |
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| 191 | !-- Receive temperature at the bottom surface from the ocean |
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| 192 | IF ( myid == 0 ) THEN |
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| 193 | CALL MPI_RECV( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, & |
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| 194 | target_id, 14, comm_inter, status, ierr ) |
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| 195 | ENDIF |
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| 196 | CALL MPI_BARRIER( comm2d, ierr ) |
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| 197 | CALL MPI_BCAST( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, 0, comm2d, & |
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| 198 | ierr ) |
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| 199 | pt(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg) |
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| 200 | ! |
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| 201 | !-- Send momentum flux (u) at bottom surface to the ocean |
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| 202 | total_2d_a = 0.0 |
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| 203 | total_2d = 0.0 |
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| 204 | total_2d(nys:nyn,nxl:nxr) = usws(nys:nyn,nxl:nxr) |
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| 205 | CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, 0, & |
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| 206 | comm2d, ierr ) |
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| 207 | CALL interpolate_to_ocean( 15 ) |
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| 208 | ! |
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| 209 | !-- Send momentum flux (v) at bottom surface to the ocean |
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| 210 | total_2d_a = 0.0 |
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| 211 | total_2d = 0.0 |
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| 212 | total_2d(nys:nyn,nxl:nxr) = vsws(nys:nyn,nxl:nxr) |
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| 213 | CALL MPI_REDUCE( total_2d, total_2d_a, ngp_a, MPI_REAL, MPI_SUM, 0, & |
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| 214 | comm2d, ierr ) |
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| 215 | CALL interpolate_to_ocean( 16 ) |
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| 216 | ! |
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| 217 | !-- Receive u at the bottom surface from the ocean |
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| 218 | IF ( myid == 0 ) THEN |
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| 219 | CALL MPI_RECV( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, & |
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| 220 | target_id, 17, comm_inter, status, ierr ) |
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| 221 | ENDIF |
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| 222 | CALL MPI_BARRIER( comm2d, ierr ) |
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| 223 | CALL MPI_BCAST( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, 0, comm2d, & |
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| 224 | ierr ) |
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| 225 | u(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg) |
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| 226 | ! |
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| 227 | !-- Receive v at the bottom surface from the ocean |
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| 228 | IF ( myid == 0 ) THEN |
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| 229 | CALL MPI_RECV( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, & |
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| 230 | target_id, 18, comm_inter, status, ierr ) |
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| 231 | ENDIF |
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| 232 | CALL MPI_BARRIER( comm2d, ierr ) |
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| 233 | CALL MPI_BCAST( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, 0, comm2d, & |
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| 234 | ierr ) |
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| 235 | v(0,nysg:nyng,nxlg:nxrg) = total_2d_a(nysg:nyng,nxlg:nxrg) |
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| 236 | |
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| 237 | ENDIF |
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| 238 | |
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| 239 | ELSEIF ( coupling_mode == 'ocean_to_atmosphere' ) THEN |
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| 240 | |
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| 241 | ! |
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| 242 | !-- Horizontal grid size and number of processors is equal |
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| 243 | !-- in ocean and atmosphere |
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| 244 | IF ( coupling_topology == 0 ) THEN |
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| 245 | ! |
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| 246 | !-- Receive heat flux at the sea surface (top) from the atmosphere |
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| 247 | CALL MPI_RECV( tswst(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 12, & |
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| 248 | comm_inter, status, ierr ) |
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| 249 | ! |
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| 250 | !-- Receive humidity flux from the atmosphere (bottom) |
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| 251 | !-- and add it to the heat flux at the sea surface (top)... |
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| 252 | IF ( humidity_remote ) THEN |
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| 253 | CALL MPI_RECV( qswst_remote(nysg,nxlg), ngp_xy, MPI_REAL, & |
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| 254 | target_id, 13, comm_inter, status, ierr ) |
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| 255 | ENDIF |
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| 256 | ! |
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| 257 | !-- Send sea surface temperature to the atmosphere model |
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| 258 | CALL MPI_SEND( pt(nzt,nysg,nxlg), 1, type_xy, target_id, 14, & |
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| 259 | comm_inter, ierr ) |
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| 260 | ! |
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| 261 | !-- Receive momentum flux (u) at the sea surface (top) from the atmosphere |
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| 262 | CALL MPI_RECV( uswst(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 15, & |
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| 263 | comm_inter, status, ierr ) |
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| 264 | ! |
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| 265 | !-- Receive momentum flux (v) at the sea surface (top) from the atmosphere |
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| 266 | CALL MPI_RECV( vswst(nysg,nxlg), ngp_xy, MPI_REAL, target_id, 16, & |
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| 267 | comm_inter, status, ierr ) |
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| 268 | ! |
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| 269 | !-- Send u to the atmosphere |
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| 270 | CALL MPI_SEND( u(nzt,nysg,nxlg), 1, type_xy, target_id, 17, & |
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| 271 | comm_inter, ierr ) |
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| 272 | ! |
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| 273 | !-- Send v to the atmosphere |
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| 274 | CALL MPI_SEND( v(nzt,nysg,nxlg), 1, type_xy, target_id, 18, & |
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| 275 | comm_inter, ierr ) |
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| 276 | ! |
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| 277 | !-- Horizontal gridsize or number of processors differs between |
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| 278 | !-- ocean and atmosphere |
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| 279 | ELSE |
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| 280 | ! |
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| 281 | !-- Receive heat flux at the sea surface (top) from the atmosphere |
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| 282 | IF ( myid == 0 ) THEN |
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| 283 | CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, & |
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| 284 | target_id, 12, comm_inter, status, ierr ) |
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| 285 | ENDIF |
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| 286 | CALL MPI_BARRIER( comm2d, ierr ) |
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| 287 | CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, comm2d, & |
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| 288 | ierr ) |
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| 289 | tswst(nysg:nyng,nxlg:nxrg) = total_2d_o(nysg:nyng,nxlg:nxrg) |
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| 290 | ! |
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| 291 | !-- Receive humidity flux at the sea surface (top) from the atmosphere |
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| 292 | IF ( humidity_remote ) THEN |
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| 293 | IF ( myid == 0 ) THEN |
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| 294 | CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, & |
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| 295 | target_id, 13, comm_inter, status, ierr ) |
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| 296 | ENDIF |
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| 297 | CALL MPI_BARRIER( comm2d, ierr ) |
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| 298 | CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, & |
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| 299 | comm2d, ierr) |
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| 300 | qswst_remote(nysg:nyng,nxlg:nxrg) = total_2d_o(nysg:nyng,nxlg:nxrg) |
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| 301 | ENDIF |
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| 302 | ! |
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| 303 | !-- Send surface temperature to atmosphere |
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| 304 | total_2d_o = 0.0 |
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| 305 | total_2d = 0.0 |
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| 306 | total_2d(nys:nyn,nxl:nxr) = pt(nzt,nys:nyn,nxl:nxr) |
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| 307 | |
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| 308 | CALL MPI_REDUCE( total_2d, total_2d_o, ngp_o, MPI_REAL, MPI_SUM, 0, & |
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| 309 | comm2d, ierr) |
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| 310 | CALL interpolate_to_atmos( 14 ) |
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| 311 | ! |
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| 312 | !-- Receive momentum flux (u) at the sea surface (top) from the atmosphere |
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| 313 | IF ( myid == 0 ) THEN |
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| 314 | CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, & |
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| 315 | target_id, 15, comm_inter, status, ierr ) |
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| 316 | ENDIF |
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| 317 | CALL MPI_BARRIER( comm2d, ierr ) |
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| 318 | CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, & |
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| 319 | 0, comm2d, ierr ) |
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| 320 | uswst(nysg:nyng,nxlg:nxrg) = total_2d_o(nysg:nyng,nxlg:nxrg) |
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| 321 | ! |
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| 322 | !-- Receive momentum flux (v) at the sea surface (top) from the atmosphere |
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| 323 | IF ( myid == 0 ) THEN |
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| 324 | CALL MPI_RECV( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, & |
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| 325 | target_id, 16, comm_inter, status, ierr ) |
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| 326 | ENDIF |
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| 327 | CALL MPI_BARRIER( comm2d, ierr ) |
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| 328 | CALL MPI_BCAST( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, 0, comm2d, & |
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| 329 | ierr ) |
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| 330 | vswst(nysg:nyng,nxlg:nxrg) = total_2d_o(nysg:nyng,nxlg:nxrg) |
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| 331 | ! |
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| 332 | !-- Send u to atmosphere |
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| 333 | total_2d_o = 0.0 |
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| 334 | total_2d = 0.0 |
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| 335 | total_2d(nys:nyn,nxl:nxr) = u(nzt,nys:nyn,nxl:nxr) |
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| 336 | CALL MPI_REDUCE( total_2d, total_2d_o, ngp_o, MPI_REAL, MPI_SUM, 0, & |
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| 337 | comm2d, ierr ) |
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| 338 | CALL interpolate_to_atmos( 17 ) |
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| 339 | ! |
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| 340 | !-- Send v to atmosphere |
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| 341 | total_2d_o = 0.0 |
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| 342 | total_2d = 0.0 |
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| 343 | total_2d(nys:nyn,nxl:nxr) = v(nzt,nys:nyn,nxl:nxr) |
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| 344 | CALL MPI_REDUCE( total_2d, total_2d_o, ngp_o, MPI_REAL, MPI_SUM, 0, & |
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| 345 | comm2d, ierr ) |
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| 346 | CALL interpolate_to_atmos( 18 ) |
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| 347 | |
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| 348 | ENDIF |
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| 349 | |
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| 350 | ! |
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| 351 | !-- Conversions of fluxes received from atmosphere |
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| 352 | IF ( humidity_remote ) THEN |
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| 353 | ! |
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| 354 | !-- Here tswst is still the sum of atmospheric bottom heat fluxes, |
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| 355 | !-- * latent heat of vaporization in m2/s2, or 540 cal/g, or 40.65 kJ/mol |
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| 356 | !-- /(rho_atm(=1.0)*c_p) |
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| 357 | tswst = tswst + qswst_remote * 2.2626108E6 / 1005.0 |
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| 358 | ! |
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| 359 | !-- ...and convert it to a salinity flux at the sea surface (top) |
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| 360 | !-- following Steinhorn (1991), JPO 21, pp. 1681-1683: |
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| 361 | !-- S'w' = -S * evaporation / ( rho_water * ( 1 - S ) ) |
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| 362 | saswst = -1.0 * sa(nzt,:,:) * qswst_remote / & |
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| 363 | ( rho(nzt,:,:) * ( 1.0 - sa(nzt,:,:) ) ) |
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| 364 | ENDIF |
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| 365 | |
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| 366 | ! |
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| 367 | !-- Adjust the kinematic heat flux with respect to ocean density |
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| 368 | !-- (constants are the specific heat capacities for air and water) |
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| 369 | !-- now tswst is the ocean top heat flux |
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| 370 | tswst = tswst / rho(nzt,:,:) * 1005.0 / 4218.0 |
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| 371 | |
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| 372 | ! |
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| 373 | !-- Adjust the momentum fluxes with respect to ocean density |
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| 374 | uswst = uswst / rho(nzt,:,:) |
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| 375 | vswst = vswst / rho(nzt,:,:) |
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| 376 | |
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| 377 | ENDIF |
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| 378 | |
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| 379 | IF ( coupling_topology == 1 ) THEN |
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| 380 | DEALLOCATE( total_2d_o, total_2d_a ) |
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| 381 | ENDIF |
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| 382 | |
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| 383 | CALL cpu_log( log_point(39), 'surface_coupler', 'stop' ) |
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| 384 | |
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| 385 | #endif |
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| 386 | |
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| 387 | END SUBROUTINE surface_coupler |
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| 388 | |
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| 389 | |
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| 390 | |
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| 391 | SUBROUTINE interpolate_to_atmos( tag ) |
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| 392 | |
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| 393 | USE arrays_3d |
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| 394 | USE control_parameters |
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| 395 | USE grid_variables |
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| 396 | USE indices |
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| 397 | USE pegrid |
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| 398 | |
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| 399 | IMPLICIT NONE |
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| 400 | |
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| 401 | INTEGER :: dnx, dnx2, dny, dny2, i, ii, j, jj |
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| 402 | INTEGER, intent(in) :: tag |
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| 403 | |
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| 404 | CALL MPI_BARRIER( comm2d, ierr ) |
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| 405 | |
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| 406 | IF ( myid == 0 ) THEN |
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| 407 | ! |
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| 408 | !-- Cyclic boundary conditions for the total 2D-grid |
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| 409 | total_2d_o(-nbgp:-1,:) = total_2d_o(ny+1-nbgp:ny,:) |
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| 410 | total_2d_o(:,-nbgp:-1) = total_2d_o(:,nx+1-nbgp:nx) |
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| 411 | |
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| 412 | total_2d_o(ny+1:ny+nbgp,:) = total_2d_o(0:nbgp-1,:) |
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| 413 | total_2d_o(:,nx+1:nx+nbgp) = total_2d_o(:,0:nbgp-1) |
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| 414 | |
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| 415 | ! |
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| 416 | !-- Number of gridpoints of the fine grid within one mesh of the coarse grid |
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| 417 | dnx = (nx_o+1) / (nx_a+1) |
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| 418 | dny = (ny_o+1) / (ny_a+1) |
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| 419 | |
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| 420 | ! |
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| 421 | !-- Distance for interpolation around coarse grid points within the fine |
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| 422 | !-- grid (note: 2*dnx2 must not be equal with dnx) |
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| 423 | dnx2 = 2 * ( dnx / 2 ) |
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| 424 | dny2 = 2 * ( dny / 2 ) |
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| 425 | |
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| 426 | total_2d_a = 0.0 |
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| 427 | ! |
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| 428 | !-- Interpolation from ocean-grid-layer to atmosphere-grid-layer |
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| 429 | DO j = 0, ny_a |
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| 430 | DO i = 0, nx_a |
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| 431 | DO jj = 0, dny2 |
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| 432 | DO ii = 0, dnx2 |
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| 433 | total_2d_a(j,i) = total_2d_a(j,i) & |
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| 434 | + total_2d_o(j*dny+jj,i*dnx+ii) |
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| 435 | ENDDO |
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| 436 | ENDDO |
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| 437 | total_2d_a(j,i) = total_2d_a(j,i) / ( ( dnx2 + 1 ) * ( dny2 + 1 ) ) |
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| 438 | ENDDO |
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| 439 | ENDDO |
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| 440 | ! |
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| 441 | !-- Cyclic boundary conditions for atmosphere grid |
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| 442 | total_2d_a(-nbgp:-1,:) = total_2d_a(ny_a+1-nbgp:ny_a,:) |
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| 443 | total_2d_a(:,-nbgp:-1) = total_2d_a(:,nx_a+1-nbgp:nx_a) |
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| 444 | |
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| 445 | total_2d_a(ny_a+1:ny_a+nbgp,:) = total_2d_a(0:nbgp-1,:) |
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| 446 | total_2d_a(:,nx_a+1:nx_a+nbgp) = total_2d_a(:,0:nbgp-1) |
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| 447 | ! |
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| 448 | !-- Transfer of the atmosphere-grid-layer to the atmosphere |
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| 449 | CALL MPI_SEND( total_2d_a(-nbgp,-nbgp), ngp_a, MPI_REAL, target_id, & |
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| 450 | tag, comm_inter, ierr ) |
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| 451 | |
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| 452 | ENDIF |
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| 453 | |
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| 454 | CALL MPI_BARRIER( comm2d, ierr ) |
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| 455 | |
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| 456 | END SUBROUTINE interpolate_to_atmos |
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| 457 | |
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| 458 | |
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| 459 | SUBROUTINE interpolate_to_ocean( tag ) |
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| 460 | |
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| 461 | USE arrays_3d |
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| 462 | USE control_parameters |
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| 463 | USE grid_variables |
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| 464 | USE indices |
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| 465 | USE pegrid |
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| 466 | |
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| 467 | IMPLICIT NONE |
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| 468 | |
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| 469 | INTEGER :: dnx, dny, i, ii, j, jj |
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| 470 | INTEGER, intent(in) :: tag |
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| 471 | REAL :: fl, fr, myl, myr |
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| 472 | |
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| 473 | |
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| 474 | CALL MPI_BARRIER( comm2d, ierr ) |
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| 475 | |
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| 476 | IF ( myid == 0 ) THEN |
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| 477 | |
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| 478 | ! |
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| 479 | !-- Number of gridpoints of the fine grid within one mesh of the coarse grid |
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| 480 | dnx = ( nx_o + 1 ) / ( nx_a + 1 ) |
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| 481 | dny = ( ny_o + 1 ) / ( ny_a + 1 ) |
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| 482 | |
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| 483 | ! |
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| 484 | !-- Cyclic boundary conditions for atmosphere grid |
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| 485 | total_2d_a(-nbgp:-1,:) = total_2d_a(ny+1-nbgp:ny,:) |
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| 486 | total_2d_a(:,-nbgp:-1) = total_2d_a(:,nx+1-nbgp:nx) |
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| 487 | |
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| 488 | total_2d_a(ny+1:ny+nbgp,:) = total_2d_a(0:nbgp-1,:) |
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| 489 | total_2d_a(:,nx+1:nx+nbgp) = total_2d_a(:,0:nbgp-1) |
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| 490 | ! |
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| 491 | !-- Bilinear Interpolation from atmosphere grid-layer to ocean grid-layer |
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| 492 | DO j = 0, ny |
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| 493 | DO i = 0, nx |
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| 494 | myl = ( total_2d_a(j+1,i) - total_2d_a(j,i) ) / dny |
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| 495 | myr = ( total_2d_a(j+1,i+1) - total_2d_a(j,i+1) ) / dny |
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| 496 | DO jj = 0, dny-1 |
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| 497 | fl = myl*jj + total_2d_a(j,i) |
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| 498 | fr = myr*jj + total_2d_a(j,i+1) |
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| 499 | DO ii = 0, dnx-1 |
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| 500 | total_2d_o(j*dny+jj,i*dnx+ii) = ( fr - fl ) / dnx * ii + fl |
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| 501 | ENDDO |
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| 502 | ENDDO |
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| 503 | ENDDO |
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| 504 | ENDDO |
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| 505 | ! |
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| 506 | !-- Cyclic boundary conditions for ocean grid |
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| 507 | total_2d_o(-nbgp:-1,:) = total_2d_o(ny_o+1-nbgp:ny_o,:) |
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| 508 | total_2d_o(:,-nbgp:-1) = total_2d_o(:,nx_o+1-nbgp:nx_o) |
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| 509 | |
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| 510 | total_2d_o(ny_o+1:ny_o+nbgp,:) = total_2d_o(0:nbgp-1,:) |
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| 511 | total_2d_o(:,nx_o+1:nx_o+nbgp) = total_2d_o(:,0:nbgp-1) |
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| 512 | |
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| 513 | CALL MPI_SEND( total_2d_o(-nbgp,-nbgp), ngp_o, MPI_REAL, & |
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| 514 | target_id, tag, comm_inter, ierr ) |
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| 515 | |
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| 516 | ENDIF |
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| 517 | |
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| 518 | CALL MPI_BARRIER( comm2d, ierr ) |
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| 519 | |
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| 520 | END SUBROUTINE interpolate_to_ocean |
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