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Ignore:
Timestamp:
Dec 23, 2010 12:06:00 PM (14 years ago)
Author:
suehring
Message:

summary:

Gryschka:

  • Coupling with different resolution and different numbers of PEs in ocean and atmosphere is available
  • Exchange of u and v from ocean surface to atmosphere surface
  • Mirror boundary condition for u and v at the bottom are replaced by dirichlet boundary conditions
  • Inflow turbulence is now defined by flucuations around spanwise mean
  • Bugfixes for cyclic_fill and constant_volume_flow

Suehring:

  • New advection added ( Wicker and Skamarock 5th order ), therefore:
    • New module advec_ws.f90
    • Modified exchange of ghost boundaries.
    • Modified evaluation of turbulent fluxes
    • New index bounds nxlg, nxrg, nysg, nyng

advec_ws.f90

Advection scheme for scalars and momentum using the flux formulation of
Wicker and Skamarock 5th order.
Additionally the module contains of a routine using for initialisation and
steering of the statical evaluation. The computation of turbulent fluxes takes
place inside the advection routines.
In case of vector architectures Dirichlet and Radiation boundary conditions are
outstanding and not available. Furthermore simulations within topography are
not possible so far. A further routine local_diss_ij is available and is used
if a control of dissipative fluxes is desired.

check_parameters.f90

Exchange of parameters between ocean and atmosphere via PE0
Check for illegal combination of ws-scheme and timestep scheme.
Check for topography and ws-scheme.
Check for not cyclic boundary conditions in combination with ws-scheme and
loop_optimization = 'vector'.
Check for call_psolver_at_all_substeps and ws-scheme for momentum_advec.

Different processor/grid topology in atmosphere and ocean is now allowed!
Bugfixes in checking for conserve_volume_flow_mode.

exchange_horiz.f90

Dynamic exchange of ghost points with nbgp_local to ensure that no useless
ghost points exchanged in case of multigrid. type_yz(0) and type_xz(0) used for
normal grid, the remaining types used for the several grid levels.
Exchange is done via MPI-Vectors with a dynamic value of ghost points which
depend on the advection scheme. Exchange of left and right PEs is 10% faster
with MPI-Vectors than without.

flow_statistics.f90

When advection is computed with ws-scheme, turbulent fluxes are already
computed in the respective advection routines and buffered in arrays
sums_xxxx_ws_l(). This is due to a consistent treatment of statistics
with the numerics and to avoid unphysical kinks near the surface. So some if-
requests has to be done to dicern between fluxes from ws-scheme other advection
schemes. Furthermore the computation of z_i is only done if the heat flux
exceeds a minimum value. This affects only simulations of a neutral boundary
layer and is due to reasons of computations in the advection scheme.

inflow_turbulence.f90

Using nbgp recycling planes for a better resolution of the turbulent flow near
the inflow.

init_grid.f90

Definition of new array bounds nxlg, nxrg, nysg, nyng on each PE.
Furthermore the allocation of arrays and steering of loops is done with these
parameters. Call of exchange_horiz are modified.
In case of dirichlet bounday condition at the bottom zu(0)=0.0
dzu_mg has to be set explicitly for a equally spaced grid near bottom.
ddzu_pres added to use a equally spaced grid near bottom.

init_pegrid.f90

Moved determination of target_id's from init_coupling
Determination of parameters needed for coupling (coupling_topology, ngp_a, ngp_o)
with different grid/processor-topology in ocean and atmosphere

Adaption of ngp_xy, ngp_y to a dynamic number of ghost points.
The maximum_grid_level changed from 1 to 0. 0 is the normal grid, 1 to
maximum_grid_level the grids for multigrid, in which 0 and 1 are normal grids.
This distinction is due to reasons of data exchange and performance for the
normal grid and grids in poismg.
The definition of MPI-Vectors adapted to a dynamic numer of ghost points.
New MPI-Vectors for data exchange between left and right boundaries added.
This is due to reasons of performance (10% faster).

ATTENTION: nnz_x undefined problem still has to be solved!!!!!!!!
TEST OUTPUT (TO BE REMOVED) logging mpi2 ierr values

parin.f90

Steering parameter dissipation_control added in inipar.

Makefile

Module advec_ws added.

Modules

Removed u_nzb_p1_for_vfc and v_nzb_p1_for_vfc

For coupling with different resolution in ocean and atmophere:
+nx_a, +nx_o, ny_a, +ny_o, ngp_a, ngp_o, +total_2d_o, +total_2d_a,
+coupling_topology

Buffer arrays for the left sided advective fluxes added in arrays_3d.
+flux_s_u, +flux_s_v, +flux_s_w, +diss_s_u, +diss_s_v, +diss_s_w,
+flux_s_pt, +diss_s_pt, +flux_s_e, +diss_s_e, +flux_s_q, +diss_s_q,
+flux_s_sa, +diss_s_sa
3d arrays for dissipation control added. (only necessary for vector arch.)
+var_x, +var_y, +var_z, +gamma_x, +gamma_y, +gamma_z
Default of momentum_advec and scalar_advec changed to 'ws-scheme' .
+exchange_mg added in control_parameters to steer the data exchange.
Parameters +nbgp, +nxlg, +nxrg, +nysg, +nyng added in indices.
flag array +boundary_flags added in indices to steer the degradation of order
of the advective fluxes when non-cyclic boundaries are used.
MPI-datatypes +type_y, +type_y_int and +type_yz for data_exchange added in
pegrid.
+sums_wsus_ws_l, +sums_wsvs_ws_l, +sums_us2_ws_l, +sums_vs2_ws_l,
+sums_ws2_ws_l, +sums_wspts_ws_l, +sums_wssas_ws_l, +sums_wsqs_ws_l
and +weight_substep added in statistics to steer the statistical evaluation
of turbulent fluxes in the advection routines.
LOGICALS +ws_scheme_sca and +ws_scheme_mom added to get a better performance
in prognostic_equations.
LOGICAL +dissipation_control control added to steer numerical dissipation
in ws-scheme.

Changed length of string run_description_header

pres.f90

New allocation of tend when ws-scheme and multigrid is used. This is due to
reasons of perforance of the data_exchange. The same is done with p after
poismg is called.
nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng when no
multigrid is used. Calls of exchange_horiz are modified.

bugfix: After pressure correction no volume flow correction in case of
non-cyclic boundary conditions
(has to be done only before pressure correction)

Call of SOR routine is referenced with ddzu_pres.

prognostic_equations.f90

Calls of the advection routines with WS5 added.
Calls of ws_statistics added to set the statistical arrays to zero after each
time step.

advec_particles.f90

Declaration of de_dx, de_dy, de_dz adapted to additional ghost points.
Furthermore the calls of exchange_horiz were modified.

asselin_filter.f90

nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng

average_3d_data.f90

nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng

boundary_conds.f90

nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng
Removed mirror boundary conditions for u and v at the bottom in case of
ibc_uv_b == 0. Instead, dirichelt boundary conditions (u=v=0) are set
in init_3d_model

calc_liquid_water_content.f90

nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng

calc_spectra.f90

nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng for
allocation of tend.

check_open.f90

Output of total array size was adapted to nbgp.

data_output_2d.f90

nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng in loops and
allocation of arrays local_2d and total_2d.
Calls of exchange_horiz are modified.

data_output_2d.f90

nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng in loops and
allocation of arrays. Calls of exchange_horiz are modified.
Skip-value skip_do_avs changed to a dynamic adaption of ghost points.

data_output_mask.f90

Calls of exchange_horiz are modified.

diffusion_e.f90

nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng

diffusion_s.f90

nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng

diffusion_u.f90

nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng

diffusion_v.f90

nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng

diffusion_w.f90

nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng

diffusivities.f90

nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng

diffusivities.f90

nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng.
Calls of exchange_horiz are modified.

exchange_horiz_2d.f90

Dynamic exchange of ghost points with nbgp, which depends on the advection
scheme. Exchange between left and right PEs is now done with MPI-vectors.

global_min_max.f90

Adapting of the index arrays, because MINLOC assumes lowerbound
at 1 and not at nbgp.

init_3d_model.f90

nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng in loops and
allocation of arrays. Calls of exchange_horiz are modified.
Call ws_init to initialize arrays needed for statistical evaluation and
optimization when ws-scheme is used.
Initial volume flow is now calculated by using the variable hom_sum.
Therefore the correction of initial volume flow for non-flat topography
removed (removed u_nzb_p1_for_vfc and v_nzb_p1_for_vfc)
Changed surface boundary conditions for u and v in case of ibc_uv_b == 0 from
mirror bc to dirichlet boundary conditions (u=v=0), so that k=nzb is
representative for the height z0

Bugfix: type conversion of '1' to 64bit for the MAX function (ngp_3d_inner)

init_coupling.f90

determination of target_id's moved to init_pegrid

init_pt_anomaly.f90

Call of exchange_horiz are modified.

init_rankine.f90

nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng.
Calls of exchange_horiz are modified.

init_slope.f90

nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng.

header.f90

Output of advection scheme.

poismg.f90

Calls of exchange_horiz are modified.

prandtl_fluxes.f90

Changed surface boundary conditions for u and v from mirror bc to dirichelt bc,
therefore u(uzb,:,:) and v(nzb,:,:) is now representative for the height z0
nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng

production_e.f90

nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng

read_3d_binary.f90

+/- 1 replaced with +/- nbgp when swapping and allocating variables.

sor.f90

nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng.
Call of exchange_horiz are modified.
bug removed in declaration of ddzw(), nz replaced by nzt+1

subsidence.f90

nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng.

sum_up_3d_data.f90

nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng.

surface_coupler.f90

nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng in
MPI_SEND() and MPI_RECV.
additional case for nonequivalent processor and grid topopolgy in ocean and
atmosphere added (coupling_topology = 1)

Added exchange of u and v from Ocean to Atmosphere

time_integration.f90

Calls of exchange_horiz are modified.
Adaption to slooping surface.

timestep.f90

nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng.

user_3d_data_averaging.f90, user_data_output_2d.f90, user_data_output_3d.f90,
user_actions.f90, user_init.f90, user_init_plant_canopy.f90

nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng.

user_read_restart_data.f90

Allocation with nbgp.

wall_fluxes.f90

nxl-1, nxr+1, nys-1, nyn+1 replaced by nxlg, nxrg, nysg, nyng.

write_compressed.f90

Array bounds and nx, ny adapted with nbgp.

sor.f90

bug removed in declaration of ddzw(), nz replaced by nzt+1

Location:
palm/trunk/SOURCE
Files:
2 edited

Legend:

Unmodified
Added
Removed

  • palm/trunk/SOURCE

    • Property svn:mergeinfo set to (toggle deleted branches)
      /palm/branches/suehring423-666
      /palm/branches/letzel/masked_output/SOURCE296-409

  • palm/trunk/SOURCE/init_grid.f90

    r559 r667  
    44! Current revisions:
    55! -----------------
    6 !
     6! Definition of new array bounds nxlg, nxrg, nysg, nyng on each PE.
     7! Furthermore the allocation of arrays and steering of loops is done with these
     8! parameters. Call of exchange_horiz are modified.
     9! In case of dirichlet bounday condition at the bottom zu(0)=0.0
     10! dzu_mg has to be set explicitly for a equally spaced grid near bottom.
     11! ddzu_pres added to use a equally spaced grid near bottom.
    712!
    813! Former revisions:
    … …  
    7681
    7782    REAL, DIMENSION(:,:,:), ALLOCATABLE ::  distance
    78 
     83   
     84!
     85!   Computation of the array bounds.
     86    nxlg = nxl - nbgp
     87    nxrg = nxr + nbgp
     88    nysg = nys - nbgp
     89    nyng = nyn + nbgp
    7990!
    8091!-- Allocate grid arrays
    8192    ALLOCATE( ddzu(1:nzt+1), ddzw(1:nzt+1), dd2zu(1:nzt), dzu(1:nzt+1), &
    82               dzw(1:nzt+1), l_grid(1:nzt), zu(0:nzt+1), zw(0:nzt+1) )
     93              dzw(1:nzt+1), l_grid(1:nzt), zu(nzb:nzt+1), zw(nzb:nzt+1) )
    8394
    8495!
    … …  
    97108!
    98109!--    Grid for atmosphere with surface at z=0 (k=0, w-grid).
    99 !--    Since the w-level lies on the surface, the first u-level (staggered!)
    100 !--    lies below the surface (used for "mirror" boundary condition).
    101110!--    The first u-level above the surface corresponds to the top of the
    102111!--    Prandtl-layer.
    103        zu(0) = - dz * 0.5
     112
     113       IF ( ibc_uv_b == 0 .OR. ibc_uv_b == 2 ) THEN
     114          zu(0) = 0.0
     115      !    zu(0) = - dz * 0.5
     116       ELSE
     117          zu(0) = - dz * 0.5
     118       ENDIF
    104119       zu(1) =   dz * 0.5
    105120
    … …  
    173188       dd2zu(k) = 1.0 / ( dzu(k) + dzu(k+1) )
    174189    ENDDO
     190   
     191!   
     192!-- In case of FFT method or SOR swap inverse grid lenght ddzu to ddzu_fft and
     193!-- modify the lowest entry. This is necessary for atmosphere runs, because
     194!-- zu(0) and so ddzu(1) changed. Accompanied with this modified arrays
     195!-- pressure solver uses wrong values and this causes kinks in the profiles
     196!-- of turbulent quantities. 
     197    IF ( psolver /= 'multigrid' ) THEN
     198       ALLOCATE( ddzu_pres(1:nzt+1) )
     199       ddzu_pres = ddzu
     200       IF( .NOT. ocean ) ddzu_pres(1) = ddzu_pres(2)
     201    ENDIF   
    175202
    176203!
    … …  
    187214
    188215       dzu_mg(:,maximum_grid_level) = dzu
     216!       
     217!--    To ensure a equally spaced grid. For ocean runs this is not necessary,
     218!--    because zu(0) does not changed so far. Also this would cause errors
     219!--    if a vertical stretching for ocean runs is used.
     220       IF ( .NOT. ocean ) dzu_mg(1,maximum_grid_level) = dzu(2)
    189221       dzw_mg(:,maximum_grid_level) = dzw
    190222       nzt_l = nzt
    … …  
    239271!-- the flag arrays needed for the multigrid method
    240272    gls = 2**( maximum_grid_level )
     273
    241274    ALLOCATE( corner_nl(nys:nyn,nxl:nxr), corner_nr(nys:nyn,nxl:nxr),       &
    242275              corner_sl(nys:nyn,nxl:nxr), corner_sr(nys:nyn,nxl:nxr),       &
    243               nzb_local(-gls:ny+gls,-gls:nx+gls), nzb_tmp(-1:ny+1,-1:nx+1), &
     276              nzb_local(-gls:ny+gls,-gls:nx+gls),                                   &
     277              nzb_tmp(-nbgp:ny+nbgp,-nbgp:nx+nbgp),                         &
    244278              wall_l(nys:nyn,nxl:nxr), wall_n(nys:nyn,nxl:nxr),             &
    245279              wall_r(nys:nyn,nxl:nxr), wall_s(nys:nyn,nxl:nxr) )
    246     ALLOCATE( fwxm(nys-1:nyn+1,nxl-1:nxr+1), fwxp(nys-1:nyn+1,nxl-1:nxr+1), &
    247               fwym(nys-1:nyn+1,nxl-1:nxr+1), fwyp(nys-1:nyn+1,nxl-1:nxr+1), &
    248               fxm(nys-1:nyn+1,nxl-1:nxr+1), fxp(nys-1:nyn+1,nxl-1:nxr+1),   &
    249               fym(nys-1:nyn+1,nxl-1:nxr+1), fyp(nys-1:nyn+1,nxl-1:nxr+1),   &
    250               nzb_s_inner(nys-1:nyn+1,nxl-1:nxr+1),                         &
    251               nzb_s_outer(nys-1:nyn+1,nxl-1:nxr+1),                         &
    252               nzb_u_inner(nys-1:nyn+1,nxl-1:nxr+1),                         &
    253               nzb_u_outer(nys-1:nyn+1,nxl-1:nxr+1),                         &
    254               nzb_v_inner(nys-1:nyn+1,nxl-1:nxr+1),                         &
    255               nzb_v_outer(nys-1:nyn+1,nxl-1:nxr+1),                         &
    256               nzb_w_inner(nys-1:nyn+1,nxl-1:nxr+1),                         &
    257               nzb_w_outer(nys-1:nyn+1,nxl-1:nxr+1),                         &
    258               nzb_diff_s_inner(nys-1:nyn+1,nxl-1:nxr+1),                    &
    259               nzb_diff_s_outer(nys-1:nyn+1,nxl-1:nxr+1),                    &
    260               nzb_diff_u(nys-1:nyn+1,nxl-1:nxr+1),                          &
    261               nzb_diff_v(nys-1:nyn+1,nxl-1:nxr+1),                          &
    262               nzb_2d(nys-1:nyn+1,nxl-1:nxr+1),                              &
    263               wall_e_x(nys-1:nyn+1,nxl-1:nxr+1),                            &
    264               wall_e_y(nys-1:nyn+1,nxl-1:nxr+1),                            &
    265               wall_u(nys-1:nyn+1,nxl-1:nxr+1),                              &
    266               wall_v(nys-1:nyn+1,nxl-1:nxr+1),                              &
    267               wall_w_x(nys-1:nyn+1,nxl-1:nxr+1),                            &
    268               wall_w_y(nys-1:nyn+1,nxl-1:nxr+1) )
    269 
    270     ALLOCATE( l_wall(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) )
     280    ALLOCATE( fwxm(nysg:nyng,nxlg:nxrg), fwxp(nysg:nyng,nxlg:nxrg),         &
     281              fwym(nysg:nyng,nxlg:nxrg), fwyp(nysg:nyng,nxlg:nxrg),         &
     282              fxm(nysg:nyng,nxlg:nxrg), fxp(nysg:nyng,nxlg:nxrg),           &
     283              fym(nysg:nyng,nxlg:nxrg), fyp(nysg:nyng,nxlg:nxrg),           &
     284              nzb_s_inner(nysg:nyng,nxlg:nxrg),                             &
     285              nzb_s_outer(nysg:nyng,nxlg:nxrg),                             &
     286              nzb_u_inner(nysg:nyng,nxlg:nxrg),                             &
     287              nzb_u_outer(nysg:nyng,nxlg:nxrg),                             &
     288              nzb_v_inner(nysg:nyng,nxlg:nxrg),                             &
     289              nzb_v_outer(nysg:nyng,nxlg:nxrg),                             &
     290              nzb_w_inner(nysg:nyng,nxlg:nxrg),                             &
     291              nzb_w_outer(nysg:nyng,nxlg:nxrg),                             &
     292              nzb_diff_s_inner(nysg:nyng,nxlg:nxrg),                        &
     293              nzb_diff_s_outer(nysg:nyng,nxlg:nxrg),                        &
     294              nzb_diff_u(nysg:nyng,nxlg:nxrg),                              &
     295              nzb_diff_v(nysg:nyng,nxlg:nxrg),                              &
     296              nzb_2d(nysg:nyng,nxlg:nxrg),                                  &
     297              wall_e_x(nysg:nyng,nxlg:nxrg),                                &
     298              wall_e_y(nysg:nyng,nxlg:nxrg),                                &
     299              wall_u(nysg:nyng,nxlg:nxrg),                                  &
     300              wall_v(nysg:nyng,nxlg:nxrg),                                  &
     301              wall_w_x(nysg:nyng,nxlg:nxrg),                                &
     302              wall_w_y(nysg:nyng,nxlg:nxrg) )
     303
     304
     305
     306    ALLOCATE( l_wall(nzb:nzt+1,nysg:nyng,nxlg:nxrg) )
    271307
    272308    nzb_s_inner = nzb;  nzb_s_outer = nzb
    … …  
    327363    vertical_influence(0) = vertical_influence(1)
    328364
    329     DO  i = nxl-1, nxr+1
    330        DO  j = nys-1, nyn+1
     365    DO  i = nxlg, nxrg
     366       DO  j = nysg, nyng
    331367          DO  k = nzb_s_inner(j,i) + 1, &
    332368                  nzb_s_inner(j,i) + vertical_influence(nzb_s_inner(j,i))
    … …  
    477513          nzb_local(:,-gls:-1)        = nzb_local(:,nx-gls+1:nx)
    478514          nzb_local(:,nx+1:nx+gls)    = nzb_local(:,0:gls-1)
     515
     516
    479517     
    480518          GOTO 12
    … …  
    588626!--    nzb_s_outer:
    589627!--    extend nzb_local east-/westwards first, then north-/southwards
    590        nzb_tmp = nzb_local(-1:ny+1,-1:nx+1)
     628       nzb_tmp = nzb_local(-nbgp:ny+nbgp,-nbgp:nx+nbgp)
    591629       DO  j = -1, ny + 1
    592630          DO  i = 0, nx
    … …  
    620658!--    nzb_u_inner:
    621659!--    extend nzb_local rightwards only
    622        nzb_tmp = nzb_local(-1:ny+1,-1:nx+1)
     660       nzb_tmp = nzb_local(-nbgp:ny+nbgp,-nbgp:nx+nbgp)
    623661       DO  j = -1, ny + 1
    624662          DO  i = 0, nx + 1
    … …  
    626664          ENDDO
    627665       ENDDO
    628        nzb_u_inner = nzb_tmp(nys-1:nyn+1,nxl-1:nxr+1)
     666       nzb_u_inner = nzb_tmp(nysg:nyng,nxlg:nxrg)
    629667
    630668!
    … …  
    652690!--    nzb_v_inner:
    653691!--    extend nzb_local northwards only
    654        nzb_tmp = nzb_local(-1:ny+1,-1:nx+1)
     692       nzb_tmp = nzb_local(-nbgp:ny+nbgp,-nbgp:nx+nbgp)
    655693       DO  i = -1, nx + 1
    656694          DO  j = 0, ny + 1
    … …  
    658696          ENDDO
    659697       ENDDO
    660        nzb_v_inner = nzb_tmp(nys-1:nyn+1,nxl-1:nxr+1)
     698       nzb_v_inner = nzb_tmp(nys-nbgp:nyn+nbgp,nxl-nbgp:nxr+nbgp)
    661699
    662700!
    … …  
    10961134!
    10971135!-- Need to set lateral boundary conditions for l_wall
    1098     CALL exchange_horiz( l_wall )
     1136
     1137    CALL exchange_horiz( l_wall, nbgp )
    10991138
    11001139    DEALLOCATE( corner_nl, corner_nr, corner_sl, corner_sr, nzb_local, &
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