[335] | 1 | !> \file bmelt-ismip6-param.f90 |
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| 2 | !! bmelt computed from the non-local formulation suggested in ismip6 |
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| 3 | !< |
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| 4 | |
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| 5 | !> \namespace bmelt-ismip6-param |
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| 6 | !! Module for sub-shelf basal melting (grounded or ice shelves) |
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| 7 | !! \author aquiquet |
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| 8 | !! \date April 2019 |
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| 9 | !! @note from ismip6 suggested parametrisation |
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| 10 | !! Should be chosen in the module_choix |
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| 11 | !! @note Used modules |
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| 12 | !! @note - use module3D_phy |
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| 13 | !! @note - use netcdf |
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| 14 | !! @note - use io_netcdf_grisli |
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| 15 | !< |
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| 16 | |
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| 17 | !ncwa -a time TO_file_mean.nc TO_file_mean2.nc |
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| 18 | !cdo yearmean TO_file.nc TO_file_mean.nc |
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| 19 | |
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| 20 | module bmelt_beckmann_gcm_mod |
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| 21 | |
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[339] | 22 | !$ USE OMP_LIB |
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[465] | 23 | use module3D_phy,only: S,H,sealevel_2d,flot,bmelt,num_param,num_rep_42,time,dt,debug_3d |
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[446] | 24 | use geography, only: nx,ny,dx,dy,dirnameinp |
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[335] | 25 | ! note: the geom. (nx,ny,dx,dy) come from module_geoplace |
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[465] | 26 | use param_phy_mod,only:ro,rofresh,row,cl |
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[449] | 27 | use io_netcdf_grisli,only: read_ncdf_var |
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[335] | 28 | |
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| 29 | implicit none |
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| 30 | |
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[472] | 31 | real*8,parameter :: cpw = 3974.d0 |
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[442] | 32 | integer :: nbassins !< number of sectors in the ocean |
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[346] | 33 | integer :: nzoc !< number of vertical levels in the ocean (read in netcdf T/S file) |
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[335] | 34 | real*8 :: coef_OM !combined coefficient by DeConto et Pollard (m/yr/C2) |
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| 35 | real*8 :: K_t |
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[339] | 36 | real*8 :: n_tour |
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[461] | 37 | real*8, dimension (:,:,:), allocatable :: temp_ocean !< thermal forcing , input |
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[346] | 38 | real*8, dimension (:,:,:), allocatable :: salinity_ocean !< thermal forcing , input |
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| 39 | |
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[339] | 40 | real :: bmelt_empty ! bmelt value for bassins without any GCM data |
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| 41 | |
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| 42 | ! integer, dimension (nx,ny) :: profondeur |
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[461] | 43 | real*8, dimension (:), allocatable :: mean_TF !< mean thermal forcing for a given basin (non-local formula) |
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| 44 | real*8, dimension (:), allocatable :: IS_area !< ice shelf area for a given basin (non-local formula) |
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| 45 | real*8, dimension(nx,ny) :: deltaT_basin |
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[339] | 46 | integer, dimension(nx,ny) :: bassin |
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[346] | 47 | real*8, dimension (:), allocatable :: zoc !< depth of oceanic levels , input |
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[335] | 48 | real*8, dimension (nx,ny) :: mesh_area !< grid cell area |
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| 49 | real*8, dimension (nx,ny) :: ice_draft !< ice draft (S-H) |
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[339] | 50 | character(len=200) :: TO_file, SO_file, Bassin_file ! fichiers de forcage |
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[442] | 51 | logical, dimension(:), allocatable :: mask_bassin_vide ! mask true if bassin without any GCM data |
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[461] | 52 | integer :: nonlocal_bool !< non local ISMIP parametrisation? (1=yes) |
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| 53 | integer :: grlmelt_bool !< do we apply ocean melt at the grounded grounding line points (1=yes) |
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[339] | 54 | |
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[335] | 55 | contains |
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| 56 | |
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| 57 | |
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| 58 | subroutine init_bmelt |
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| 59 | |
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| 60 | ! this routine is used to initialise the sub-shelf basal melting rate |
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| 61 | |
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| 62 | |
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| 63 | real*8, dimension(:), pointer :: tab1d => null() !< 2d array real pointer, needed for netcdf readings |
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| 64 | real*8, dimension(:,:,:), pointer :: tab3d => null() !< 3d array real pointer, needed for netcdf readings |
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[339] | 65 | real*8, dimension(:,:), pointer :: tab2d => null() !< 3d array real pointer, needed for netcdf readings |
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[335] | 66 | character(len=100) :: file_inputs !< files read |
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| 67 | character(len=100) :: TO_file !< files read |
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| 68 | character(len=100) :: SO_file !< files read |
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[339] | 69 | character(len=100) :: Bassin_file !< files read |
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[461] | 70 | character(len=100) :: deltaT_file !< files read, spatial correction for Toc |
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| 71 | integer :: deltaT_bool !< Do we apply a spatial correction for Toc (1=yes) |
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[339] | 72 | integer :: i,j,k |
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| 73 | integer :: n,imin,imax,jmin,jmax |
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| 74 | logical :: test ! pour stoper boucle |
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| 75 | integer :: nbr_pts |
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| 76 | integer :: depth_max_grid ! max depth level were T S are defined (all grid) |
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| 77 | integer, dimension(nx,ny) :: depth_max ! max depth were T S are defined for every point |
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[346] | 78 | integer, dimension(:,:,:), allocatable :: mask_gcm ! mask were T S are defined |
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| 79 | integer, dimension(:,:,:), allocatable :: mask_gcm_init ! mask were T S are defined in GCM before interpolation |
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[442] | 80 | integer, dimension(:), allocatable :: max_depth_bassin ! max level were T S are defined for every bassins |
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[339] | 81 | integer :: nmax ! to avoid inifite loop |
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[346] | 82 | integer :: err |
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[490] | 83 | real :: depth_shelf_min ! minimal depth used to compute bmelt |
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| 84 | integer :: ksup |
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[461] | 85 | |
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[490] | 86 | namelist/bmelt_beckmann_gcm_mod/K_t,TO_file,SO_file,Bassin_file,nbassins,deltaT_bool,deltaT_file,bmelt_empty,nonlocal_bool,grlmelt_bool,depth_shelf_min |
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[335] | 87 | |
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| 88 | rewind(num_param) ! loop back at the beginning of the param_list.dat file |
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| 89 | read(num_param,bmelt_beckmann_gcm_mod) |
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| 90 | write(num_rep_42,'(A)')'!___________________________________________________________' |
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| 91 | write(num_rep_42,*) |
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| 92 | write(num_rep_42,bmelt_beckmann_gcm_mod) |
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[339] | 93 | |
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[442] | 94 | !K_t = 15.77 |
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[335] | 95 | |
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[339] | 96 | file_inputs=TRIM(DIRNAMEINP)//'Snapshots-GCM/'//TRIM(TO_file) |
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[346] | 97 | |
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| 98 | ! read the number of levels in T/S files : |
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| 99 | nzoc = read_nzoc(file_inputs) |
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| 100 | ! print*, 'nzoc = ',nzoc |
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| 101 | |
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| 102 | ! allocate tabs : |
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| 103 | if (.not.allocated(zoc)) then |
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| 104 | allocate(zoc(nzoc),stat=err) |
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| 105 | if (err/=0) then |
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| 106 | print *,"erreur a l'allocation du tableau zoc",err |
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| 107 | stop 4 |
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| 108 | end if |
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| 109 | end if |
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[442] | 110 | if (.not.allocated(mask_bassin_vide)) then |
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| 111 | allocate(mask_bassin_vide(nbassins),stat=err) |
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| 112 | if (err/=0) then |
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| 113 | print *,"erreur a l'allocation du tableau mask_bassin_vide",err |
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| 114 | stop 4 |
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| 115 | end if |
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| 116 | end if |
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[346] | 117 | if (.not.allocated(temp_ocean)) then |
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| 118 | allocate(temp_ocean(nx,ny,nzoc),stat=err) |
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| 119 | if (err/=0) then |
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| 120 | print *,"erreur a l'allocation du tableau temp_ocean",err |
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| 121 | stop 4 |
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| 122 | end if |
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| 123 | end if |
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| 124 | if (.not.allocated(salinity_ocean)) then |
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| 125 | allocate(salinity_ocean(nx,ny,nzoc),stat=err) |
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| 126 | if (err/=0) then |
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| 127 | print *,"erreur a l'allocation du tableau salinity_ocean",err |
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| 128 | stop 4 |
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| 129 | end if |
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| 130 | end if |
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| 131 | if (.not.allocated(mask_gcm)) then |
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| 132 | allocate(mask_gcm(nx,ny,nzoc),stat=err) |
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| 133 | if (err/=0) then |
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| 134 | print *,"erreur a l'allocation du tableau mask_gcm",err |
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| 135 | stop 4 |
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| 136 | end if |
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| 137 | end if |
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| 138 | if (.not.allocated(mask_gcm_init)) then |
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| 139 | allocate(mask_gcm_init(nx,ny,nzoc),stat=err) |
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| 140 | if (err/=0) then |
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| 141 | print *,"erreur a l'allocation du tableau mask_gcm_init",err |
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| 142 | stop 4 |
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| 143 | end if |
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| 144 | end if |
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[442] | 145 | if (.not.allocated(max_depth_bassin)) then |
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| 146 | allocate(max_depth_bassin(nbassins),stat=err) |
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| 147 | if (err/=0) then |
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| 148 | print *,"erreur a l'allocation du tableau max_depth_bassin",err |
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| 149 | stop 4 |
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| 150 | end if |
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| 151 | end if |
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[461] | 152 | if (.not.allocated(mean_TF)) then |
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| 153 | allocate(mean_TF(nbassins),stat=err) |
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| 154 | if (err/=0) then |
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| 155 | print *,"erreur a l'allocation du tableau mean_TF",err |
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| 156 | stop 4 |
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| 157 | end if |
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| 158 | end if |
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| 159 | if (.not.allocated(IS_area)) then |
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| 160 | allocate(IS_area(nbassins),stat=err) |
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| 161 | if (err/=0) then |
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| 162 | print *,"erreur a l'allocation du tableau IS_area",err |
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| 163 | stop 4 |
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| 164 | end if |
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| 165 | end if |
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[346] | 166 | |
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[335] | 167 | call Read_Ncdf_var('lev',file_inputs,tab1d) |
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| 168 | zoc(:) = -tab1d(:) |
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| 169 | call Read_Ncdf_var('thetao',file_inputs,tab3d) |
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| 170 | temp_ocean(:,:,:) = tab3d(:,:,:) |
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[481] | 171 | |
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[339] | 172 | file_inputs=TRIM(DIRNAMEINP)//'Snapshots-GCM/'//TRIM(SO_file) |
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[335] | 173 | call Read_Ncdf_var('so',file_inputs,tab3d) |
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| 174 | salinity_ocean(:,:,:) = tab3d(:,:,:) |
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[461] | 175 | |
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| 176 | if (deltaT_bool.eq.1) then |
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| 177 | file_inputs=TRIM(DIRNAMEINP)//'Snapshots-GCM/'//TRIM(deltaT_file) |
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| 178 | call Read_Ncdf_var('deltaT_basin',file_inputs,tab2d) |
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| 179 | deltaT_basin(:,:) = tab2d(:,:) |
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| 180 | else |
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| 181 | deltaT_basin(:,:) = 0. |
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| 182 | endif |
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| 183 | |
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[339] | 184 | file_inputs=TRIM(DIRNAMEINP)//'Snapshots-GCM/'//TRIM(Bassin_file) |
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| 185 | call Read_Ncdf_var('mask',file_inputs,tab2d) |
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| 186 | bassin(:,:) = tab2d(:,:) |
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| 187 | |
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| 188 | ! calcul de la profondeur max pour chaque point : |
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| 189 | |
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| 190 | !$OMP PARALLEL |
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| 191 | !$OMP WORKSHARE |
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| 192 | depth_max(:,:) = 0 |
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| 193 | !$OMP END WORKSHARE |
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| 194 | !$OMP END PARALLEL |
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| 195 | |
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| 196 | !$OMP PARALLEL PRIVATE(k) |
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| 197 | !$OMP DO |
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| 198 | do j=1,ny |
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| 199 | do i=1,nx |
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| 200 | if (temp_ocean(i,j,1).lt.1.e10) then |
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| 201 | k=2 |
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| 202 | do while (temp_ocean(i,j,k).lt.1.e10 .and. (k.le.nzoc)) |
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| 203 | k=k+1 |
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| 204 | enddo |
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| 205 | depth_max(i,j) = k-1 ! max level were T and S are defined for this point |
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| 206 | endif |
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| 207 | enddo |
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| 208 | enddo |
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| 209 | !$OMP END DO |
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| 210 | !$OMP END PARALLEL |
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| 211 | |
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| 212 | depth_max_grid=maxval(depth_max(:,:)) ! max depth were T and S are defined in the grid |
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[442] | 213 | |
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[339] | 214 | !$OMP PARALLEL |
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| 215 | if (depth_max_grid.lt.nzoc) then |
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| 216 | !$OMP DO |
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| 217 | do j=1,ny |
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| 218 | do i=1,nx |
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| 219 | if (temp_ocean(i,j,1).lt.1.e10 .and. depth_max(i,j).eq.depth_max_grid) then ! T and S are defined up to depth_max_grid |
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| 220 | ! extension of the values downwards |
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| 221 | do k=depth_max(i,j)+1,nzoc |
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| 222 | temp_ocean(i,j,k)=temp_ocean(i,j,depth_max_grid) |
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| 223 | salinity_ocean(i,j,k) = salinity_ocean(i,j,depth_max_grid) |
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| 224 | enddo |
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| 225 | endif |
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| 226 | enddo |
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| 227 | enddo |
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| 228 | !$OMP END DO |
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| 229 | endif |
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| 230 | |
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[335] | 231 | |
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[339] | 232 | !$OMP DO |
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| 233 | do n=1,nbassins |
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| 234 | max_depth_bassin(n)=maxval(depth_max(:,:),mask=bassin(:,:).eq.n) |
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| 235 | enddo |
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| 236 | !$OMP END DO |
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| 237 | |
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| 238 | ! print*,'max_depth_bassin bassin ', max_depth_bassin |
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| 239 | |
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| 240 | |
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| 241 | ! mask_gcm_init = 1 si valeur dans gcm, 0 si pas de valeur => tableau avec uniquement les valeurs initiales du GCM |
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| 242 | !$OMP WORKSHARE |
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| 243 | mask_gcm_init(:,:,:) = 1 |
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| 244 | where (temp_ocean(:,:,:).gt.1.e10) |
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| 245 | mask_gcm_init(:,:,:) = 0 |
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[461] | 246 | endwhere |
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[339] | 247 | |
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| 248 | ! mask_gcm = 1 si valeur dans gcm, 0 si pas de valeur => tableau update lorsqu'on rempli la grille |
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| 249 | mask_gcm(:,:,:) = 1 |
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| 250 | where (temp_ocean(:,:,:).gt.1.e10) |
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| 251 | mask_gcm(:,:,:) = 0 |
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[461] | 252 | endwhere |
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[339] | 253 | !$OMP END WORKSHARE |
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| 254 | |
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| 255 | |
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| 256 | ! mask_bassin_vide : identifie les bassins oceaniques sans aucune valeur du GCM en surface |
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| 257 | !$OMP BARRIER |
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| 258 | !$OMP DO |
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| 259 | do n=1,nbassins |
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| 260 | if (sum(mask_gcm(:,:,1),mask=bassin(:,:).eq.n).eq.0) then |
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| 261 | mask_bassin_vide(n)=.true. |
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| 262 | else |
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| 263 | mask_bassin_vide(n)=.false. |
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| 264 | endif |
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| 265 | enddo |
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| 266 | !$OMP END DO |
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| 267 | !$OMP END PARALLEL |
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| 268 | nmax = max(nx,ny) |
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| 269 | |
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| 270 | |
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| 271 | !$OMP PARALLEL PRIVATE(n,test) |
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| 272 | !$OMP DO |
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| 273 | do k=1,nzoc |
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| 274 | do j=1,ny |
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| 275 | do i=1,nx |
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| 276 | if ((mask_gcm(i,j,k).eq.0) .and. (.not.mask_bassin_vide(bassin(i,j))) .and. (k.le.max_depth_bassin(bassin(i,j)))) then ! point sans valeur dans bassin avec des points GCM |
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| 277 | test=.true. |
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| 278 | n=1 |
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| 279 | do while (test.and.(n.lt.nmax)) |
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| 280 | imin=max(1,i-n) |
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| 281 | imax=min(NX,i+n) |
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| 282 | jmin=max(1,j-n) |
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| 283 | jmax=min(NY,j+n) |
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| 284 | nbr_pts = count((bassin(imin:imax,jmin:jmax).eq.bassin(i,j)) .and. (mask_gcm_init(imin:imax,jmin:jmax,k).eq.1)) |
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| 285 | if (nbr_pts.ge.1) then |
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| 286 | temp_ocean(i,j,k)=sum(temp_ocean(imin:imax,jmin:jmax,k),mask = (bassin(imin:imax,jmin:jmax).eq.bassin(i,j)) & |
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| 287 | .and. (mask_gcm_init(imin:imax,jmin:jmax,k).eq.1)) / nbr_pts ! calcul la moyenne de temp_ocean sur les pts non masques |
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| 288 | salinity_ocean(i,j,k)=sum(salinity_ocean(imin:imax,jmin:jmax,k),mask = (bassin(imin:imax,jmin:jmax).eq.bassin(i,j)) & |
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| 289 | .and. (mask_gcm_init(imin:imax,jmin:jmax,k).eq.1)) / nbr_pts ! calcul la moyenne de salinity_ocean sur les pts non masques |
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| 290 | mask_gcm(i,j,k)=1 |
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| 291 | test=.false. |
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| 292 | endif |
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| 293 | n=n+1 |
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| 294 | enddo |
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| 295 | if (n.eq.nmax) print*,'bug boucle infinie',n,i,j,k, mask_gcm(i,j,k), mask_bassin_vide(bassin(i,j)),max_depth_bassin(bassin(i,j)), bassin(i,j) |
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| 296 | endif |
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| 297 | enddo |
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| 298 | enddo |
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| 299 | enddo |
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| 300 | !$OMP END DO |
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| 301 | |
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| 302 | ! extension des valeurs de temp salinité sur les points des secteurs vides |
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| 303 | !$OMP DO |
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| 304 | do k=1,nzoc |
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| 305 | do j=1,ny |
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| 306 | do i=1,nx |
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| 307 | !if ((mask_gcm(i,j,k).eq.0) .and. (mask_bassin_vide(bassin(i,j)))) then ! point sans valeur dans bassin sans aucun points GCM |
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| 308 | if (mask_gcm(i,j,k).eq.0) then ! point sans valeur dans bassin sans aucun points GCM |
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| 309 | test=.true. |
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| 310 | n=1 |
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| 311 | do while (test.and.(n.lt.nmax)) |
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| 312 | imin=max(1,i-n) |
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| 313 | imax=min(NX,i+n) |
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| 314 | jmin=max(1,j-n) |
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| 315 | jmax=min(NY,j+n) |
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| 316 | nbr_pts = count(mask_gcm_init(imin:imax,jmin:jmax,k).eq.1) |
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| 317 | if (nbr_pts.ge.1) then |
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| 318 | temp_ocean(i,j,k)=sum(temp_ocean(imin:imax,jmin:jmax,k),mask = mask_gcm_init(imin:imax,jmin:jmax,k).eq.1) / nbr_pts ! calcul la moyenne de temp_ocean sur les pts non masques |
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| 319 | salinity_ocean(i,j,k)=sum(salinity_ocean(imin:imax,jmin:jmax,k),mask = mask_gcm_init(imin:imax,jmin:jmax,k).eq.1) / nbr_pts! calcul la moyenne de salinity_ocean sur les pts non masques |
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| 320 | mask_gcm(i,j,k)=1 |
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| 321 | test=.false. |
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| 322 | endif |
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| 323 | n=n+1 |
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| 324 | enddo |
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| 325 | endif |
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| 326 | enddo |
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| 327 | enddo |
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| 328 | enddo |
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| 329 | !$OMP END DO |
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[490] | 330 | |
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| 331 | ! limitation de la temperature a une profondeur depth_shelf_min pour eviter tx fonte tres faible au front des ice-shelves |
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| 332 | ! recherche de l'indice de profondeur |
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| 333 | do k=1,nzoc |
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| 334 | if ( zoc(k).GT.depth_shelf_min) ksup = k + 1 |
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| 335 | enddo |
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| 336 | if (ksup.LT.2) print*,'bmelt-beckmann-gcm_mod, check depth_shelf_min : ksup = ',ksup |
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| 337 | |
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| 338 | do k=1,ksup - 1 |
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| 339 | !$OMP WORKSHARE |
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| 340 | temp_ocean(:,:,k) = temp_ocean(:,:,ksup) |
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| 341 | salinity_ocean(:,:,k) = salinity_ocean(:,:,ksup) |
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| 342 | !$OMP END WORKSHARE |
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| 343 | enddo |
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| 344 | |
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[339] | 345 | |
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[490] | 346 | |
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[339] | 347 | !$OMP WORKSHARE |
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| 348 | debug_3d(:,:,129) = temp_ocean(:,:,19) |
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| 349 | debug_3d(:,:,130) = salinity_ocean(:,:,19) |
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| 350 | mesh_area(:,:) = dx*dy ! this could be corrected to account for projection deformation |
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| 351 | !$OMP END WORKSHARE |
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| 352 | !$OMP END PARALLEL |
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| 353 | |
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| 354 | ! print*,'zoc profondeur : ',zoc |
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| 355 | |
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| 356 | ! print*, 'temp_ocean', temp_ocean(1,1,:) |
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| 357 | ! print*, 'salinity_ocean', salinity_ocean(1,1,:) |
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| 358 | |
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[481] | 359 | !temp_ocean(:,:,:) = temp_ocean(:,:,:) - 273.15 |
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| 360 | |
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[442] | 361 | !coef_OM = K_t * 0.01420418516 |
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[472] | 362 | coef_OM = K_t * (row * cpw / (cl * ro))**2 |
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[335] | 363 | |
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| 364 | if ( ubound(zoc,dim=1).ne.nzoc) then |
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| 365 | write (*,*) "bmelt_beckmann_gcm: pb with the number of oceanic layers! abort..." |
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| 366 | STOP |
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| 367 | endif |
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| 368 | |
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| 369 | end subroutine init_bmelt |
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| 370 | |
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| 371 | |
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| 372 | |
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| 373 | subroutine bmeltshelf |
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| 374 | |
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| 375 | ! this routine is used to compute the sub-shelf basal melting rate |
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| 376 | |
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| 377 | real*8, dimension(nx,ny) :: TO_draft |
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| 378 | real*8, dimension(nx,ny) :: SO_draft |
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| 379 | real*8, dimension(nx,ny) :: T_freez |
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| 380 | |
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| 381 | integer :: i,j,k,kinf,ksup,ngr |
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| 382 | real*8 :: bmloc |
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| 383 | |
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[339] | 384 | |
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| 385 | !$OMP PARALLEL PRIVATE(ksup,kinf,ngr,bmloc) |
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| 386 | !$OMP WORKSHARE |
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[335] | 387 | ice_draft(:,:) = S(:,:)-H(:,:)-sealevel_2d(:,:) |
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[461] | 388 | mean_TF(:) = 0.d0 |
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| 389 | IS_area(:) = 0.d0 |
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[339] | 390 | !$OMP END WORKSHARE |
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[335] | 391 | |
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[339] | 392 | !$OMP DO |
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[335] | 393 | do j=1,ny |
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| 394 | do i=1,nx |
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| 395 | |
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| 396 | if (flot(i,j).and.(temp_ocean(i,j,1).lt.1.e10)) then |
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| 397 | |
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| 398 | if (H(i,j).gt.0.d0) then !limit on the critical thickness of ice to define the ice shelf mask |
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| 399 | ! we should use Hcalv |
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| 400 | |
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| 401 | ! 1 - Linear interpolation of the thermal forcing on the ice draft depth : |
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| 402 | ksup=nzoc |
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| 403 | do k=nzoc-1,2,-1 |
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| 404 | if ( zoc(k) .le. ice_draft(i,j) ) ksup = k |
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| 405 | enddo |
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| 406 | kinf = ksup - 1 |
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| 407 | if ( ice_draft(i,j) .gt. zoc(1) ) then |
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[461] | 408 | TO_draft(i,j) = temp_ocean(i,j,1) |
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| 409 | SO_draft(i,j) = salinity_ocean(i,j,1) |
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| 410 | T_freez(i,j) = 0.0939 - 0.057 * salinity_ocean(i,j,1) + 0.000764 * zoc(1) |
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[335] | 411 | elseif ( ice_draft(i,j) .lt. zoc(nzoc) ) then |
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[461] | 412 | TO_draft(i,j) = temp_ocean(i,j,nzoc) |
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| 413 | SO_draft(i,j) = salinity_ocean(i,j,nzoc) |
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| 414 | T_freez(i,j) = 0.0939 - 0.057 * salinity_ocean(i,j,nzoc) + 0.000764 * zoc(nzoc) |
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[335] | 415 | else |
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[339] | 416 | !TO_draft(i,j) = ( (zoc(ksup)-ice_draft(i,j)) * temp_ocean(i,j,kinf) & |
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| 417 | ! & + (ice_draft(i,j)-zoc(kinf)) * temp_ocean(i,j,ksup) ) / (zoc(ksup)-zoc(kinf)) |
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| 418 | !SO_draft(i,j) = ( (zoc(ksup)-ice_draft(i,j)) * salinity_ocean(i,j,kinf) & |
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| 419 | ! & + (ice_draft(i,j)-zoc(kinf)) * salinity_ocean(i,j,ksup) ) / (zoc(ksup)-zoc(kinf)) |
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[461] | 420 | TO_draft(i,j) = temp_ocean(i,j,ksup) + ((ice_draft(i,j)-zoc(ksup))*(temp_ocean(i,j,kinf)-temp_ocean(i,j,ksup))/(zoc(kinf)-zoc(ksup))) |
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| 421 | SO_draft(i,j) = salinity_ocean(i,j,ksup) + ((ice_draft(i,j)-zoc(ksup))*(salinity_ocean(i,j,kinf)-salinity_ocean(i,j,ksup))/(zoc(kinf)-zoc(ksup))) |
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| 422 | T_freez(i,j) = 0.0939 - 0.057 * SO_draft(i,j) + 0.000764 * ice_draft(i,j) |
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[335] | 423 | endif |
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[461] | 424 | |
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| 425 | if (nonlocal_bool.eq.1) then |
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| 426 | mean_TF( bassin(i,j) ) = mean_TF( bassin(i,j) ) + mesh_area(i,j) * (TO_draft(i,j)-T_freez(i,j)) |
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| 427 | IS_area( bassin(i,j) ) = IS_area( bassin(i,j) ) + mesh_area(i,j) |
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| 428 | endif |
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[339] | 429 | |
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[335] | 430 | else |
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| 431 | TO_draft(i,j) = temp_ocean(i,j,1) |
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[339] | 432 | SO_draft(i,j) = salinity_ocean(i,j,1) |
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| 433 | T_freez(i,j) = 0.0939 - 0.057 * salinity_ocean(i,j,1) + 0.000764 * zoc(1) |
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[335] | 434 | endif |
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| 435 | |
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| 436 | else |
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[339] | 437 | TO_draft(i,j) = -9999.9d0 |
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| 438 | SO_draft(i,j) = -9999.9d0 |
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| 439 | T_freez(i,j) = -9999.9d0 |
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[335] | 440 | endif |
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| 441 | enddo |
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| 442 | enddo |
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[339] | 443 | !$OMP END DO |
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[461] | 444 | |
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| 445 | where ( IS_area(:).gt.0.d0) ! for all basins that have ice shelves |
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| 446 | mean_TF(:) = mean_TF(:) / IS_area(:) |
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| 447 | elsewhere ! we have no floating points over the whole basin |
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| 448 | mean_TF(:) = -9999.d0 |
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| 449 | endwhere |
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[339] | 450 | |
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[335] | 451 | ! 3 - Calculation of melting rate : |
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| 452 | |
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| 453 | ! melt rate in m/yr (meters of pure water per year) : |
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| 454 | ! [ * rhofw_SI / rhoi_SI to get it in meters of ice per year ] |
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[339] | 455 | !$OMP DO |
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[335] | 456 | do j=1,ny |
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| 457 | do i=1,nx |
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[461] | 458 | !if ( TO_draft(i,j) .gt. -9000.d0 ) then ! floating points |
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| 459 | if ( flot(i,j) ) then ! floating points |
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[442] | 460 | !if (mask_bassin_vide(bassin(i,j)) .or. (bassin(i,j).eq.1)) then ! bassins without any GCM data or bassin 1 |
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| 461 | !if (mask_bassin_vide(bassin(i,j)) .or. (bassin(i,j).eq.1)) then !bassins without any GCM data |
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| 462 | if (mask_bassin_vide(bassin(i,j))) then !bassins without any GCM data |
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[339] | 463 | bmelt(i,j) = bmelt_empty |
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| 464 | else ! Bassins with GCM data |
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[461] | 465 | if (nonlocal_bool.eq.1) then |
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| 466 | bmelt(i,j) = coef_OM * ( TO_draft(i,j) + deltaT_basin(i,j) - T_freez(i,j) )* abs( mean_TF(bassin(i,j)) + deltaT_basin(i,j) ) |
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| 467 | else |
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| 468 | bmelt(i,j) = coef_OM * ( TO_draft(i,j) + deltaT_basin(i,j) - T_freez(i,j) )* abs( TO_draft(i,j) + deltaT_basin(i,j) - T_freez(i,j) ) |
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| 469 | endif |
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[339] | 470 | endif |
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| 471 | else |
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| 472 | bmelt(i,j)=0. |
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[335] | 473 | endif |
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| 474 | enddo |
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| 475 | enddo |
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[339] | 476 | !$OMP END DO |
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[335] | 477 | |
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[339] | 478 | !$OMP DO |
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[335] | 479 | do j=2,ny-1 |
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| 480 | do i=2,nx-1 |
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[461] | 481 | !if ( TO_draft(i,j) .le. -9000.d0 ) then !grounded points |
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| 482 | if ( .not. flot(i,j) ) then |
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| 483 | if (grlmelt_bool.eq.1) then |
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| 484 | ngr=0 |
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| 485 | bmloc=0.d0 |
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| 486 | !if (TO_draft(i+1,j) .le. -9000.d0 ) then |
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| 487 | if (flot(i+1,j)) then |
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| 488 | ngr=ngr+1 |
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| 489 | bmloc=bmloc+bmelt(i+1,j) |
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| 490 | endif |
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| 491 | !if (TO_draft(i-1,j) .le. -9000.d0 ) then |
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| 492 | if (flot(i-1,j)) then |
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| 493 | ngr=ngr+1 |
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| 494 | bmloc=bmloc+bmelt(i-1,j) |
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| 495 | endif |
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| 496 | !if (TO_draft(i,j+1) .le. -9000.d0 ) then |
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| 497 | if (flot(i,j+1)) then |
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| 498 | ngr=ngr+1 |
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| 499 | bmloc=bmloc+bmelt(i,j+1) |
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| 500 | endif |
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| 501 | !if (TO_draft(i,j-1) .le. -9000.d0 ) then |
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| 502 | if (flot(i,j-1)) then |
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| 503 | ngr=ngr+1 |
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| 504 | bmloc=bmloc+bmelt(i,j-1) |
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| 505 | endif |
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| 506 | else |
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| 507 | ngr=0 ! afq -- I do not allow subgrid ocean melt |
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[335] | 508 | endif |
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| 509 | bmelt(i,j)=(ngr/4.)*bmloc+(1-ngr/4.)*bmelt(i,j) |
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| 510 | endif |
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| 511 | enddo |
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| 512 | enddo |
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[339] | 513 | !$OMP END DO |
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| 514 | !$OMP END PARALLEL |
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[335] | 515 | |
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| 516 | end subroutine bmeltshelf |
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[346] | 517 | |
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| 518 | function read_nzoc(filename) |
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| 519 | ! Reads number of vertical levels in ocean forcing NetCDF File. |
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| 520 | ! Returns the levels number |
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| 521 | |
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| 522 | ! Reads |
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| 523 | use netcdf |
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| 524 | |
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| 525 | implicit none |
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| 526 | ! input |
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| 527 | character (len = *), intent(in) :: filename |
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| 528 | integer :: read_nzoc |
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| 529 | |
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| 530 | ! This will be the netCDF ID for the file and data variable. |
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| 531 | integer :: ncid, varid, status |
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| 532 | |
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| 533 | ! Open the file. |
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| 534 | status = nf90_open(filename, nf90_nowrite, ncid) |
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| 535 | if (status/=nf90_noerr) then |
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| 536 | write(*,*)"unable to open netcdf file : ",filename |
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| 537 | stop |
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| 538 | endif |
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| 539 | |
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| 540 | ! Get the varids of the netCDF variable. |
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| 541 | status = nf90_inq_dimid(ncid, "lev", varid) |
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| 542 | status = nf90_inquire_dimension(ncid, varid, len = read_nzoc) |
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| 543 | |
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| 544 | ! Close the file. This frees up any internal netCDF resources |
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| 545 | ! associated with the file. |
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| 546 | status = nf90_close(ncid) |
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| 547 | |
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| 548 | end function read_nzoc |
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| 549 | |
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[335] | 550 | end module bmelt_beckmann_gcm_mod |
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