/WPS/geogrid/src/gridinfo_module.F
FORTRAN Legacy | 600 lines | 358 code | 61 blank | 181 comment | 72 complexity | af394b8addea52ed10859da2faec7c16 MD5 | raw file
Possible License(s): AGPL-1.0
- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
- ! MODULE GRIDINFO_MODULE
- !
- ! This module handles (i.e., acquires, stores, and makes available) all data
- ! describing the model domains to be processed.
- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
- module gridinfo_module
- use constants_module
- use misc_definitions_module
- use module_debug
-
- ! Parameters
- integer, parameter :: MAX_DOMAINS = 21
-
- ! Variables
- integer :: iproj_type, n_domains, io_form_output, dyn_opt
- integer, dimension(MAX_DOMAINS) :: parent_grid_ratio, parent_id, ixdim, jydim
- integer, dimension(MAX_DOMAINS) :: moad_grid_ratio
- integer, dimension(MAX_DOMAINS) :: subgrid_ratio_x, subgrid_ratio_y
- real :: known_lat, known_lon, pole_lat, pole_lon, stand_lon, truelat1, truelat2, &
- known_x, known_y, dxkm, dykm, phi, lambda, ref_lat, ref_lon, ref_x, ref_y, &
- dlatdeg, dlondeg
- real, dimension(MAX_DOMAINS) :: parent_ll_x, parent_ll_y, parent_ur_x, parent_ur_y
- character (len=MAX_FILENAME_LEN) :: geog_data_path, opt_output_from_geogrid_path, opt_geogrid_tbl_path
- character (len=128), dimension(MAX_DOMAINS) :: geog_data_res
- character (len=1) :: gridtype
- logical :: do_tiled_output
- logical, dimension(MAX_DOMAINS) :: grid_is_active
- integer :: debug_level
-
- contains
-
- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
- ! Name: get_grid_params
- !
- ! Purpose: This subroutine retrieves all parameters regarding the model domains
- ! to be processed by geogrid.exe. This includes map parameters, domain
- ! size and location, and nest information.
- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
- subroutine get_grid_params()
-
- implicit none
-
- ! Local variables
- integer :: i, j, max_dom, funit, io_form_geogrid, interval_seconds
- real :: dx, dy, rparent_gridpts
- integer, dimension(MAX_DOMAINS) :: i_parent_start, j_parent_start, &
- s_we, e_we, s_sn, e_sn, &
- start_year, start_month, start_day, start_hour, start_minute, start_second, &
- end_year, end_month, end_day, end_hour, end_minute, end_second
- character (len=128) :: map_proj
- character (len=128), dimension(MAX_DOMAINS) :: start_date, end_date
- character (len=3) :: wrf_core
- logical :: is_used, nest_outside
- logical, dimension(MAX_DOMAINS) :: active_grid
- namelist /share/ wrf_core, max_dom, start_date, end_date, &
- start_year, end_year, start_month, end_month, &
- start_day, end_day, start_hour, end_hour, &
- start_minute, end_minute, start_second, end_second, &
- interval_seconds, &
- io_form_geogrid, opt_output_from_geogrid_path, debug_level, active_grid, &
- subgrid_ratio_x, subgrid_ratio_y
- namelist /geogrid/ parent_id, parent_grid_ratio, &
- i_parent_start, j_parent_start, s_we, e_we, s_sn, e_sn, &
- map_proj, ref_x, ref_y, ref_lat, ref_lon, &
- pole_lat, pole_lon, truelat1, truelat2, stand_lon, &
- dx, dy, geog_data_res, geog_data_path, opt_geogrid_tbl_path
-
- ! Set defaults for namelist variables
- debug_level = 0
- io_form_geogrid = 2
- wrf_core = 'ARW'
- max_dom = 1
- geog_data_path = 'NOT_SPECIFIED'
- ref_x = NAN
- ref_y = NAN
- ref_lat = NAN
- ref_lon = NAN
- dx = NAN
- dy = NAN
- map_proj = 'Lambert'
- pole_lat = 90.0
- pole_lon = 0.0
- truelat1 = NAN
- truelat2 = NAN
- stand_lon = NAN
- do i=1,MAX_DOMAINS
- geog_data_res(i) = 'default'
- parent_id(i) = 1
- parent_grid_ratio(i) = INVALID
- moad_grid_ratio(i) = INVALID
- s_we(i) = 1
- e_we(i) = INVALID
- s_sn(i) = 1
- e_sn(i) = INVALID
- start_year(i) = 0
- start_month(i) = 0
- start_day(i) = 0
- start_hour(i) = 0
- start_minute(i) = 0
- start_second(i) = 0
- end_year(i) = 0
- end_month(i) = 0
- end_day(i) = 0
- end_hour(i) = 0
- end_minute(i) = 0
- end_second(i) = 0
- start_date(i) = '0000-00-00_00:00:00'
- end_date(i) = '0000-00-00_00:00:00'
- active_grid(i) = .true.
- subgrid_ratio_x(i) = 1
- subgrid_ratio_y(i) = 1
- end do
- moad_grid_ratio(1) = 1
- opt_output_from_geogrid_path = './'
- opt_geogrid_tbl_path = 'geogrid/'
- interval_seconds = INVALID
-
- ! Read parameters from Fortran namelist
- do funit=10,100
- inquire(unit=funit, opened=is_used)
- if (.not. is_used) exit
- end do
- open(funit,file='namelist.wps',status='old',form='formatted',err=1000)
- read(funit,share)
- read(funit,geogrid)
- close(funit)
- ! BUG: More properly handle debug_level in module_debug
- if (debug_level.gt.100) then
- call set_debug_level(DEBUG)
- else
- call set_debug_level(WARN)
- end if
- call mprintf(.true.,LOGFILE,'Using the following namelist variables:')
- call mprintf(.true.,LOGFILE,'&SHARE')
- call mprintf(.true.,LOGFILE,' WRF_CORE = %s',s1=wrf_core)
- call mprintf(.true.,LOGFILE,' MAX_DOM = %i',i1=max_dom)
- call mprintf(.true.,LOGFILE,' START_YEAR = %i',i1=start_year(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %i',i1=start_year(i))
- end do
- call mprintf(.true.,LOGFILE,' START_MONTH = %i',i1=start_month(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %i',i1=start_month(i))
- end do
- call mprintf(.true.,LOGFILE,' START_DAY = %i',i1=start_day(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %i',i1=start_day(i))
- end do
- call mprintf(.true.,LOGFILE,' START_HOUR = %i',i1=start_hour(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %i',i1=start_hour(i))
- end do
- call mprintf(.true.,LOGFILE,' START_MINUTE = %i',i1=start_minute(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %i',i1=start_minute(i))
- end do
- call mprintf(.true.,LOGFILE,' START_SECOND = %i',i1=start_second(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %i',i1=start_second(i))
- end do
- call mprintf(.true.,LOGFILE,' END_YEAR = %i',i1=end_year(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %i',i1=end_year(i))
- end do
- call mprintf(.true.,LOGFILE,' END_MONTH = %i',i1=end_month(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %i',i1=end_month(i))
- end do
- call mprintf(.true.,LOGFILE,' END_DAY = %i',i1=end_day(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %i',i1=end_day(i))
- end do
- call mprintf(.true.,LOGFILE,' END_HOUR = %i',i1=end_hour(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %i',i1=end_hour(i))
- end do
- call mprintf(.true.,LOGFILE,' END_MINUTE = %i',i1=end_minute(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %i',i1=end_minute(i))
- end do
- call mprintf(.true.,LOGFILE,' END_SECOND = %i',i1=end_second(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %i',i1=end_second(i))
- end do
- call mprintf(.true.,LOGFILE,' START_DATE = %s',s1=start_date(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %s',s1=start_date(i))
- end do
- call mprintf(.true.,LOGFILE,' END_DATE = %s',s1=end_date(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %s',s1=end_date(i))
- end do
- call mprintf(.true.,LOGFILE,' INTERVAL_SECONDS = %i',i1=interval_seconds)
- call mprintf(.true.,LOGFILE,' IO_FORM_GEOGRID = %i',i1=io_form_geogrid)
- call mprintf(.true.,LOGFILE,' OPT_OUTPUT_FROM_GEOGRID_PATH = %s',s1=opt_output_from_geogrid_path)
- call mprintf(.true.,LOGFILE,' SUBGRID_RATIO_X = %i',i1=subgrid_ratio_x(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %i',i1=subgrid_ratio_x(i))
- enddo
- call mprintf(.true.,LOGFILE,' SUBGRID_RATIO_Y = %i',i1=subgrid_ratio_y(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %i',i1=subgrid_ratio_y(i))
- enddo
- call mprintf(.true.,LOGFILE,' DEBUG_LEVEL = %i',i1=debug_level)
- call mprintf(.true.,LOGFILE,' ACTIVE_GRID = %l',l1=active_grid(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %l',l1=active_grid(i))
- end do
- call mprintf(.true.,LOGFILE,'/')
- call mprintf(.true.,LOGFILE,'&GEOGRID')
- call mprintf(.true.,LOGFILE,' PARENT_ID = %i',i1=parent_id(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %i',i1=parent_id(i))
- end do
- call mprintf(.true.,LOGFILE,' PARENT_GRID_RATIO = %i',i1=parent_grid_ratio(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %i',i1=parent_grid_ratio(i))
- end do
- call mprintf(.true.,LOGFILE,' I_PARENT_START = %i',i1=i_parent_start(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %i',i1=i_parent_start(i))
- end do
- call mprintf(.true.,LOGFILE,' J_PARENT_START = %i',i1=j_parent_start(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %i',i1=j_parent_start(i))
- end do
- call mprintf(.true.,LOGFILE,' S_WE = %i',i1=s_we(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %i',i1=s_we(i))
- end do
- call mprintf(.true.,LOGFILE,' E_WE = %i',i1=e_we(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %i',i1=e_we(i))
- end do
- call mprintf(.true.,LOGFILE,' S_SN = %i',i1=s_sn(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %i',i1=s_sn(i))
- end do
- call mprintf(.true.,LOGFILE,' E_SN = %i',i1=e_sn(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %i',i1=e_sn(i))
- end do
- call mprintf(.true.,LOGFILE,' GEOG_DATA_RES = %s',s1=geog_data_res(1))
- do i=2,max_dom
- call mprintf(.true.,LOGFILE,' = %s',s1=geog_data_res(i))
- end do
- call mprintf(.true.,LOGFILE,' DX = %f',f1=dx)
- call mprintf(.true.,LOGFILE,' DY = %f',f1=dy)
- call mprintf(.true.,LOGFILE,' MAP_PROJ = %s',s1=map_proj)
- call mprintf(.true.,LOGFILE,' POLE_LAT = %f',f1=pole_lat)
- call mprintf(.true.,LOGFILE,' POLE_LON = %f',f1=pole_lon)
- call mprintf(.true.,LOGFILE,' REF_LAT = %f',f1=ref_lat)
- call mprintf(.true.,LOGFILE,' REF_LON = %f',f1=ref_lon)
- call mprintf(.true.,LOGFILE,' REF_X = %f',f1=ref_x)
- call mprintf(.true.,LOGFILE,' REF_Y = %f',f1=ref_y)
- call mprintf(.true.,LOGFILE,' TRUELAT1 = %f',f1=truelat1)
- call mprintf(.true.,LOGFILE,' TRUELAT2 = %f',f1=truelat2)
- call mprintf(.true.,LOGFILE,' STAND_LON = %f',f1=stand_lon)
- call mprintf(.true.,LOGFILE,' GEOG_DATA_PATH = %s',s1=geog_data_path)
- call mprintf(.true.,LOGFILE,' OPT_GEOGRID_TBL_PATH = %s',s1=opt_geogrid_tbl_path)
- call mprintf(.true.,LOGFILE,'/')
- dxkm = dx
- dykm = dy
- known_lat = ref_lat
- known_lon = ref_lon
- known_x = ref_x
- known_y = ref_y
- ! Convert wrf_core to uppercase letters
- do i=1,3
- if (ichar(wrf_core(i:i)) >= 97) wrf_core(i:i) = char(ichar(wrf_core(i:i))-32)
- end do
- ! Before doing anything else, we must have a valid grid type
- gridtype = ' '
- if (wrf_core == 'ARW') then
- gridtype = 'C'
- dyn_opt = 2
- else if (wrf_core == 'NMM') then
- gridtype = 'E'
- dyn_opt = 4
- end if
- ! Next, if this is NMM, we need to subtract 1 from the specified E_WE and E_SN;
- ! for some reason, these two variables need to be set to 1 larger than they
- ! really ought to be in the WRF namelist, so, to be consistent, we will do
- ! the same in the WPS namelist
- if (gridtype == 'E') then
- do i=1,max_dom
- e_we(i) = e_we(i) - 1
- e_sn(i) = e_sn(i) - 1
- end do
- end if
-
- call mprintf(gridtype /= 'C' .and. gridtype /= 'E', ERROR, &
- 'A valid wrf_core must be specified in the namelist. '// &
- 'Currently, only "ARW" and "NMM" are supported.')
- call mprintf(max_dom > MAX_DOMAINS, ERROR, &
- 'In namelist, max_dom must be <= %i. To run with more'// &
- ' than %i domains, increase the MAX_DOMAINS parameter.', &
- i1=MAX_DOMAINS, i2=MAX_DOMAINS)
- ! Every domain must have a valid parent id
- do i=2,max_dom
- call mprintf(parent_id(i) <= 0 .or. parent_id(i) >= i, ERROR, &
- 'In namelist, the parent_id of domain %i must be in '// &
- 'the range 1 to %i.', i1=i, i2=i-1)
- end do
-
- ! Check for valid geog_data_path
- j=1
- do i=1,len(geog_data_path)
- geog_data_path(j:j) = geog_data_path(i:i)
- if (geog_data_path(i:i) /= ' ') j = j + 1
- end do
- if (geog_data_path(1:1) == ' ') then
- call mprintf(.true.,ERROR,'In namelist, geog_data_path must be specified.')
- end if
- j = len_trim(geog_data_path)
- if (j >= MAX_FILENAME_LEN) then
- call mprintf(.true.,ERROR, &
- 'In namelist, geog_data_path must be strictly less '// &
- 'than 128 characters in length.')
- else
- if (geog_data_path(j:j) /= '/') then
- geog_data_path(j+1:j+1) = '/'
- end if
- end if
- ! Paths need to end with a /
- j = len_trim(opt_geogrid_tbl_path)
- if (opt_geogrid_tbl_path(j:j) /= '/') then
- opt_geogrid_tbl_path(j+1:j+1) = '/'
- end if
- j = len_trim(opt_output_from_geogrid_path)
- if (opt_output_from_geogrid_path(j:j) /= '/') then
- opt_output_from_geogrid_path(j+1:j+1) = '/'
- end if
-
- ! Handle IOFORM+100 to do tiled IO
- if (io_form_geogrid > 100) then
- do_tiled_output = .true.
- io_form_geogrid = io_form_geogrid - 100
- else
- do_tiled_output = .false.
- end if
-
- ! Check for valid io_form_geogrid
- if ( &
- #ifdef IO_BINARY
- io_form_geogrid /= BINARY .and. &
- #endif
- #ifdef IO_NETCDF
- io_form_geogrid /= NETCDF .and. &
- #endif
- #ifdef IO_GRIB1
- io_form_geogrid /= GRIB1 .and. &
- #endif
- .true. ) then
- call mprintf(.true.,WARN,'Valid io_form_geogrid values are:')
- #ifdef IO_BINARY
- call mprintf(.true.,WARN,' %i (=BINARY)',i1=BINARY)
- #endif
- #ifdef IO_NETCDF
- call mprintf(.true.,WARN,' %i (=NETCDF)',i1=NETCDF)
- #endif
- #ifdef IO_GRIB1
- call mprintf(.true.,WARN,' %i (=GRIB1)',i1=GRIB1)
- #endif
- call mprintf(.true.,ERROR,'No valid value for io_form_geogrid was specified in the namelist.')
- end if
- io_form_output = io_form_geogrid
-
- ! Convert map_proj to uppercase letters
- do i=1,len(map_proj)
- if (ichar(map_proj(i:i)) >= 97) map_proj(i:i) = char(ichar(map_proj(i:i))-32)
- end do
-
- ! Assign parameters to module variables
- if ((index(map_proj, 'LAMBERT') /= 0) .and. &
- (len_trim(map_proj) == len('LAMBERT'))) then
- iproj_type = PROJ_LC
-
- else if ((index(map_proj, 'MERCATOR') /= 0) .and. &
- (len_trim(map_proj) == len('MERCATOR'))) then
- iproj_type = PROJ_MERC
-
- else if ((index(map_proj, 'POLAR') /= 0) .and. &
- (len_trim(map_proj) == len('POLAR'))) then
- iproj_type = PROJ_PS
-
- else if ((index(map_proj, 'ROTATED_LL') /= 0) .and. &
- (len_trim(map_proj) == len('ROTATED_LL'))) then
- iproj_type = PROJ_ROTLL
-
- else if ((index(map_proj, 'LAT-LON') /= 0) .and. &
- (len_trim(map_proj) == len('LAT-LON'))) then
- iproj_type = PROJ_CASSINI
-
- else
- call mprintf(.true.,ERROR,&
- 'In namelist, invalid map_proj specified. Valid '// &
- 'projections are "lambert", "mercator", "polar", '// &
- '"lat-lon", and "rotated_ll".')
- end if
- ! For Cassini / lat-lon projections
- if (iproj_type == PROJ_CASSINI) then
- ! If no dx,dy specified, assume global grid
- if (dx == NAN .and. dy == NAN) then
- dlondeg = 360. / (e_we(1)-s_we(1)) ! Here, we really do not want e_we-s_we+1
- dlatdeg = 180. / (e_sn(1)-s_sn(1)) ! Here, we really do not want e_we-s_we+1
- known_x = 1.
- known_y = 1.
- known_lon = stand_lon + dlondeg/2.
- known_lat = -90. + dlatdeg/2.
- dxkm = EARTH_RADIUS_M * PI * 2.0 / (e_we(1)-s_we(1))
- dykm = EARTH_RADIUS_M * PI / (e_sn(1)-s_sn(1))
- ! If dx,dy specified, however, assume regional grid
- else
- dlatdeg = dy
- dlondeg = dx
- dxkm = dlondeg * EARTH_RADIUS_M * PI * 2.0 / 360.0
- dykm = dlatdeg * EARTH_RADIUS_M * PI * 2.0 / 360.0
- if (known_lat == NAN .or. known_lon == NAN) then
- call mprintf(.true.,ERROR,'For lat-lon projection, if dx/dy are specified, '// &
- 'a regional domain is assumed, and a ref_lat,ref_lon must also be specified')
- end if
- end if
- end if
- ! Manually set truelat2 = truelat1 if truelat2 not specified for Lambert
- if (iproj_type == PROJ_LC .and. truelat2 == NAN) then
- call mprintf ((truelat1 == NAN), ERROR, "No TRUELAT1 specified for Lambert conformal projection.")
- truelat2 = truelat1
- end if
-
- n_domains = max_dom
-
- ! For C grid, let ixdim and jydim be the number of velocity points in
- ! each direction; for E grid, we will put the row and column back
- ! later; maybe this should be changed to be more clear, though.
- do i=1,n_domains
- ixdim(i) = e_we(i) - s_we(i) + 1
- jydim(i) = e_sn(i) - s_sn(i) + 1
- end do
-
- if (gridtype == 'E') then
- phi = dykm*real(jydim(1)-1)/2.
- lambda = dxkm*real(ixdim(1)-1)
- end if
- ! If the user hasn't supplied a known_x and known_y, assume the center of domain 1
- if (gridtype == 'E' .and. (known_x /= NAN .or. known_y /= NAN)) then
- call mprintf(.true.,WARN, &
- 'Namelist variables ref_x and ref_y cannot be used for NMM grids.'// &
- ' (ref_lat, ref_lon) will refer to the center of the coarse grid.')
- else if (gridtype == 'C') then
- if (known_x == NAN .and. known_y == NAN) then
- known_x = ixdim(1) / 2.
- known_y = jydim(1) / 2.
- else if (known_x == NAN .or. known_y == NAN) then
- call mprintf(.true.,ERROR, &
- 'In namelist.wps, neither or both of ref_x, ref_y must be specified.')
- end if
- end if
- ! Checks specific to E grid
- if (gridtype == 'E') then
-
- ! E grid supports only the rotated lat/lon projection
- if (iproj_type /= PROJ_ROTLL) then
- call mprintf(.true., WARN, &
- 'For the NMM core, projection type must be rotated '// &
- 'lat/lon (map_proj=rotated_ll)')
- call mprintf(.true.,WARN,'Projection will be set to rotated_ll')
- iproj_type = PROJ_ROTLL
- end if
-
- ! In the following check, add back the 1 that we had to subtract above
- ! for the sake of being consistent with WRF namelist
- call mprintf(mod(e_sn(1)+1,2) /= 0, ERROR, &
- 'For the NMM core, E_SN must be an even number for grid %i.', i1=1)
- do i=2,n_domains
- call mprintf((parent_grid_ratio(i) /= 3), WARN, &
- 'For the NMM core, the parent_grid_ratio must be 3 for '// &
- 'domain %i. A ratio of 3 will be assumed.', i1=i)
- parent_grid_ratio(i) = 3
- end do
- ! Check that nests have an acceptable number of grid points in each dimension
- ! do i=2,n_domains
- ! rparent_gridpts = real(ixdim(i)+2)/real(parent_grid_ratio(i))
- ! if (floor(rparent_gridpts) /= ceiling(rparent_gridpts)) then
- ! call mprintf(.true.,ERROR,'For nest %i, e_we must be 3n-2 '// &
- ! 'for some integer n > 1.', &
- ! i1=i)
- ! end if
- ! rparent_gridpts = real(jydim(i)+2)/real(parent_grid_ratio(i))
- ! if (floor(rparent_gridpts) /= ceiling(rparent_gridpts)) then
- ! call mprintf(.true.,ERROR,'For nest %i, e_sn must be 3n-2 '// &
- ! 'for some odd integer n > 1.', &
- ! i1=i)
- ! end if
- ! end do
- do i=2,n_domains
- parent_ll_x(i) = 1.
- parent_ll_y(i) = 1.
- end do
-
- ! Checks specific to C grid
- else if (gridtype == 'C') then
-
- ! C grid does not support the rotated lat/lon projection
- call mprintf((iproj_type == PROJ_ROTLL), ERROR, &
- 'Rotated lat/lon projection is not supported for the ARW core. '// &
- 'Valid projecitons are "lambert", "mercator", "polar", and "lat-lon".')
- ! Check that nests have an acceptable number of grid points in each dimension
- do i=2,n_domains
- rparent_gridpts = real(ixdim(i)-1)/real(parent_grid_ratio(i))
- if (floor(rparent_gridpts) /= ceiling(rparent_gridpts)) then
- call mprintf(.true.,ERROR,'For nest %i, (e_we-s_we+1) must be one greater '// &
- 'than an interger multiple of the parent_grid_ratio of %i.', &
- i1=i, i2=parent_grid_ratio(i))
- end if
- rparent_gridpts = real(jydim(i)-1)/real(parent_grid_ratio(i))
- if (floor(rparent_gridpts) /= ceiling(rparent_gridpts)) then
- call mprintf(.true.,ERROR,'For nest %i, (e_sn-s_sn+1) must be one greater '// &
- 'than an interger multiple of the parent_grid_ratio of %i.', &
- i1=i, i2=parent_grid_ratio(i))
- end if
- end do
- ! Check that a nest does not extend outside of its parent grid
- nest_outside = .false.
- do i=2,n_domains
- if (i_parent_start(i) >= ixdim(parent_id(i))) then
- call mprintf(.true.,WARN,'Nest %i cannot have i_parent_start outside of parent domain.',i1=i)
- nest_outside = .true.
- else if (i_parent_start(i) + (ixdim(i) - 1)/parent_grid_ratio(i) > ixdim(parent_id(i))) then
- call mprintf(.true.,WARN,'Nest %i extends beyond its parent grid in the west-east direction.',i1=i)
- call mprintf(.true.,WARN,' Maximum allowable e_we for current i/j_parent_start is %i.', &
- i1=(ixdim(parent_id(i))-i_parent_start(i))*parent_grid_ratio(i)+1 )
- nest_outside = .true.
- end if
- if (j_parent_start(i) >= jydim(parent_id(i))) then
- call mprintf(.true.,WARN,'Nest %i cannot have j_parent_start outside of parent domain.',i1=i)
- nest_outside = .true.
- else if (j_parent_start(i) + (jydim(i) - 1)/parent_grid_ratio(i) > jydim(parent_id(i))) then
- call mprintf(.true.,WARN,'Nest %i extends beyond its parent grid in the south-north direction.',i1=i)
- call mprintf(.true.,WARN,' Maximum allowable e_sn for current i/j_parent_start is %i.', &
- i1=(jydim(parent_id(i))-j_parent_start(i))*parent_grid_ratio(i)+1 )
- nest_outside = .true.
- end if
- end do
- if (nest_outside) then
- call mprintf(.true.,ERROR,'One or more nested domains extend beyond their parent domains.')
- end if
- do i=1,n_domains
- parent_ll_x(i) = real(i_parent_start(i))
- parent_ll_y(i) = real(j_parent_start(i))
- parent_ur_x(i) = real(i_parent_start(i))+real(ixdim(i))/real(parent_grid_ratio(i))-1.
- parent_ur_y(i) = real(j_parent_start(i))+real(jydim(i))/real(parent_grid_ratio(i))-1.
- grid_is_active(i) = active_grid(i)
- end do
- end if
- ! calculate the grid ratio between each domain and the moad (mother of all domains)
- ! i.e. the product of parent_grid_ratio traversing down the nest tree
- do i=2,n_domains
- moad_grid_ratio(i)=moad_grid_ratio(parent_id(i))*parent_grid_ratio(i)
- end do
-
- return
-
- 1000 call mprintf(.true.,ERROR,'Error opening file namelist.wps')
-
- end subroutine get_grid_params
-
- end module gridinfo_module