forked from DOI-USGS/volcano-ash3d-metreader
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MetReader_NetCDF.f90
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MetReader_NetCDF.f90
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!##############################################################################
!##############################################################################
!##############################################################################
!##############################################################################
!
! MR_Read_Met_DimVars_netcdf
!
! Called once from MR_Read_Met_DimVars
!
! This subroutine reads the variable and dimension IDs, and fills the
! coordinate dimension variables
!
! After this subroutine completes, the following variables will be set:
! All the projection parameters of NWP grid
! Met_dim_names, Met_var_GRIB_names, Met_var_conversion_factor,
! Met_var_IsAvailable
! The lengths of all the dimensions of the file
! p_fullmet_sp (converted to Pa)
! x_fullmet_sp, y_fullmet_sp
! IsLatLon_MetGrid, IsGlobal_MetGrid, IsRegular_MetGrid
!
!##############################################################################
subroutine MR_Read_Met_DimVars_netcdf
use MetReader
use netcdf
use projection
implicit none
integer, parameter :: sp = 4 ! single precision
integer, parameter :: dp = 8 ! double precision
integer :: i, k
real(kind=sp) :: xLL_fullmet
real(kind=sp) :: yLL_fullmet
real(kind=sp) :: xUR_fullmet
real(kind=sp) :: yUR_fullmet
integer :: ncid
integer :: ivar,in_var_id,var_ndims
integer :: i_dim,iivar
integer :: xdim_id, ydim_id, tdim_id
integer :: dimlen,maxdimlen
integer :: nSTAT
character(len=NF90_MAX_NAME) :: invar,dimname
integer :: var_xtype,var_id,idx
integer :: xtype, length, attnum
real(kind=dp), parameter :: tol = 1.0e-3_dp
real(kind=dp) :: x_start,y_start
integer,dimension(:),allocatable :: var_dimIDs
logical :: FoundOldDim
logical :: IsPressureDimension
real(kind=dp),dimension(:), allocatable :: dum1d_dp
real(kind=sp),dimension(:), allocatable :: dum1d_sp
character(len=31) :: ustring
logical :: IsTruncatedDim
character(len=130) :: infile
if(MR_VERB.ge.1)then
write(MR_global_production,*)"--------------------------------------------------------------------------------"
write(MR_global_production,*)"---------- MR_Read_Met_DimVars_netcdf ----------"
write(MR_global_production,*)"--------------------------------------------------------------------------------"
endif
if(MR_iwind.eq.5)then
! For the case where variables are in different files, we will just hard-code the
! grid geometry
if (MR_iwindformat.eq.25) then
! NCEP/NCAR reanalysis 2.5 degree files
! https://rda.ucar.edu/datasets/ds090.0
maxdimlen = 17
nlev_coords_detected = 3
allocate(nlevs_fullmet(nlev_coords_detected));nlevs_fullmet(:)=0
nlevs_fullmet(1) = 17
nlevs_fullmet(2) = 12
nlevs_fullmet(3) = 8
allocate(levs_code(nlev_coords_detected));levs_code(:)=0
levs_code(1) = 1
levs_code(2) = 2
levs_code(3) = 2
allocate(levs_fullmet_sp(nlev_coords_detected,maxdimlen));levs_fullmet_sp(:,:)=0
np_fullmet = 17
allocate(p_fullmet_sp(np_fullmet))
levs_fullmet_sp(:,:) = 0.0_sp
p_fullmet_sp(1:np_fullmet) = &
(/1000.0_sp, 925.0_sp, 850.0_sp, 700.0_sp, 600.0_sp, &
500.0_sp, 400.0_sp, 300.0_sp, 250.0_sp, 200.0_sp, &
150.0_sp, 100.0_sp, 70.0_sp, 50.0_sp, 30.0_sp, &
20.0_sp, 10.0_sp /)
z_inverted = .false.
levs_fullmet_sp(1,1:17) = p_fullmet_sp(1:17)*Pressure_Conv_Fac
levs_fullmet_sp(2,1:12) = p_fullmet_sp(1:12)*Pressure_Conv_Fac
levs_fullmet_sp(3,1:8 ) = p_fullmet_sp(1:8 )*Pressure_Conv_Fac
Met_var_zdim_idx( 1) = 1
Met_var_zdim_idx( 2) = 1
Met_var_zdim_idx( 3) = 1
Met_var_zdim_idx( 4) = 2
Met_var_zdim_idx( 5) = 1
Met_var_zdim_idx( 7) = 2
Met_var_zdim_idx(30) = 3
IsLatLon_MetGrid = .true.
IsGlobal_MetGrid = .true.
IsRegular_MetGrid = .true.
nx_fullmet = 144
ny_fullmet = 73
allocate(x_fullmet_sp(0:nx_fullmet+1))
allocate(y_fullmet_sp(ny_fullmet))
allocate(MR_dx_met(nx_fullmet))
allocate(MR_dy_met(ny_fullmet))
dx_met_const = 2.5_sp
dy_met_const = 2.5_sp
x_start = 0.0_dp
y_start = 90.0_dp
do i = 0,nx_fullmet+1
x_fullmet_sp(i) = real(x_start + (i-1)*dx_met_const,kind=sp)
enddo
x_inverted = .false.
do i = 1,ny_fullmet
y_fullmet_sp(i) = real(y_start - (i-1)*dy_met_const,kind=sp)
enddo
y_inverted = .true.
do i = 1,nx_fullmet
MR_dx_met(i) = x_fullmet_sp(i+1)-x_fullmet_sp(i)
enddo
do i = 1,ny_fullmet-1
MR_dy_met(i) = y_fullmet_sp(i+1)-y_fullmet_sp(i)
enddo
MR_dy_met(ny_fullmet) = MR_dy_met(ny_fullmet-1)
iwf25_scale_facs = 0.0_sp
iwf25_offsets = 0.0_sp
iwf25_scale_facs(1) = 1.0_sp ; iwf25_offsets(1) = 32066.0_sp ! hgt
iwf25_scale_facs(2) = 0.01_sp ; iwf25_offsets(2) = 202.66_sp ! uwnd
iwf25_scale_facs(3) = 0.01_sp ; iwf25_offsets(3) = 202.66_sp ! vwnd
iwf25_scale_facs(4) = 0.001_sp ; iwf25_offsets(4) = 29.765_sp ! omega
iwf25_scale_facs(5) = 0.01_sp ; iwf25_offsets(5) = 477.66_sp ! air (temperature)
iwf25_scale_facs(6) = 1.0_sp ; iwf25_offsets(6) = 0.0_sp ! level
iwf25_scale_facs(20) = 10.0_sp ; iwf25_offsets(20) = 327650.0_sp ! pres (lcb)
iwf25_scale_facs(21) = 10.0_sp ; iwf25_offsets(21) = 327650.0_sp ! pres (lct)
iwf25_scale_facs(30) = 0.01_sp ; iwf25_offsets(30) = 302.66_sp ! rhum
iwf25_scale_facs(31) = 1.0e-6_sp ; iwf25_offsets(31) = 0.032666_sp ! shum
iwf25_scale_facs(32) = 1.0e-6_sp ; iwf25_offsets(32) = 0.032666_sp ! shum
iwf25_scale_facs(44) = 1.0e-7_sp ; iwf25_offsets(44) = 0.0032765_sp ! prate
iwf25_scale_facs(45) = 1.0e-7_sp ; iwf25_offsets(45) = 0.0031765_sp ! cprat
elseif(MR_iwindformat.eq.26)then
! JRA-55 reanalysis 1.25 degree files
! https://rda.ucar.edu/datasets/ds628.0/
maxdimlen = 37
nlev_coords_detected = 2
allocate(nlevs_fullmet(nlev_coords_detected))
nlevs_fullmet(1) = 37
nlevs_fullmet(2) = 27
allocate(levs_code(nlev_coords_detected))
levs_code(1) = 1
levs_code(2) = 2
allocate(levs_fullmet_sp(nlev_coords_detected,maxdimlen))
np_fullmet = 37
allocate(p_fullmet_sp(np_fullmet))
levs_fullmet_sp(:,:) = 0.0_sp
p_fullmet_sp(1:np_fullmet) = &
(/1000.0_sp, 975.0_sp, 950.0_sp, 925.0_sp, 900.0_sp, &
875.0_sp, 850.0_sp, 825.0_sp, 800.0_sp, 775.0_sp, &
750.0_sp, 700.0_sp, 650.0_sp, 600.0_sp, 550.0_sp, &
500.0_sp, 450.0_sp, 400.0_sp, 350.0_sp, 300.0_sp, &
250.0_sp, 225.0_sp, 200.0_sp, 175.0_sp, 150.0_sp, &
125.0_sp, 100.0_sp, 70.0_sp, 50.0_sp, 30.0_sp, &
20.0_sp, 10.0_sp, 7.0_sp, 5.0_sp, 3.0_sp, &
2.0_sp, 1.0_sp /)
z_inverted = .true.
levs_fullmet_sp(1,1:37) = p_fullmet_sp(1:37)*Pressure_Conv_Fac
levs_fullmet_sp(2,1:27) = p_fullmet_sp(1:27)*Pressure_Conv_Fac
Met_var_zdim_idx( 1) = 1
Met_var_zdim_idx( 2) = 1
Met_var_zdim_idx( 3) = 1
Met_var_zdim_idx( 4) = 1
Met_var_zdim_idx( 5) = 1
Met_var_zdim_idx( 7) = 1
Met_var_zdim_idx(30) = 2
IsLatLon_MetGrid = .true.
IsGlobal_MetGrid = .true.
IsRegular_MetGrid = .true.
nx_fullmet = 288
ny_fullmet = 145
allocate(x_fullmet_sp(0:nx_fullmet+1))
allocate(y_fullmet_sp(ny_fullmet))
allocate(MR_dx_met(nx_fullmet))
allocate(MR_dy_met(ny_fullmet))
dx_met_const = 1.25_sp
dy_met_const = 1.25_sp
x_start = 0.0_dp
y_start = 90.0_dp
do i = 0,nx_fullmet+1
x_fullmet_sp(i) = real(x_start + (i-1)*dx_met_const,kind=sp)
enddo
x_inverted = .false.
do i = 1,ny_fullmet
y_fullmet_sp(i) = real(y_start - (i-1)*dy_met_const,kind=sp)
enddo
y_inverted = .true.
do i = 1,nx_fullmet
MR_dx_met(i) = x_fullmet_sp(i+1)-x_fullmet_sp(i)
enddo
do i = 1,ny_fullmet-1
MR_dy_met(i) = y_fullmet_sp(i+1)-y_fullmet_sp(i)
enddo
MR_dy_met(ny_fullmet) = MR_dy_met(ny_fullmet-1)
elseif(MR_iwindformat.eq.27)then
if(MR_iversion.eq.2)then
! NOAA-CIRES reanalysis 2.0 degree files :: ds131.2
! Note that v.2 is an older version.
! Since v.2 has a regular grid, we just specify it here
maxdimlen = 24
nlev_coords_detected = 2
allocate(nlevs_fullmet(nlev_coords_detected))
nlevs_fullmet(1) = 24
nlevs_fullmet(2) = 19
allocate(levs_code(nlev_coords_detected))
levs_code(1) = 1
levs_code(2) = 2
allocate(levs_fullmet_sp(nlev_coords_detected,maxdimlen))
np_fullmet = 24
allocate(p_fullmet_sp(np_fullmet))
levs_fullmet_sp(:,:) = 0.0_sp
p_fullmet_sp(1:np_fullmet) = &
(/1000.0_sp, 950.0_sp, 900.0_sp, 850.0_sp, 800.0_sp, &
750.0_sp, 700.0_sp, 650.0_sp, 600.0_sp, 550.0_sp, &
500.0_sp, 450.0_sp, 400.0_sp, 350.0_sp, 300.0_sp, &
250.0_sp, 200.0_sp, 150.0_sp, 100.0_sp, 70.0_sp, &
50.0_sp, 30.0_sp, 20.0_sp, 10.0_sp /)
if(MR_Use_RDA)then
! Files from rda.ucar.edu/datasets/ds131.2/ converted from grib with ncl_convert2nc
! are top down
z_inverted = .true.
else
! Files from www.esrl.noaa.gov are bottom up
z_inverted = .false.
endif
levs_fullmet_sp(1,1:24) = p_fullmet_sp(1:24)*Pressure_Conv_Fac
levs_fullmet_sp(2,1:19) = p_fullmet_sp(1:19)*Pressure_Conv_Fac
Met_var_zdim_idx( 1) = 1
Met_var_zdim_idx( 2) = 1
Met_var_zdim_idx( 3) = 1
Met_var_zdim_idx( 4) = 2
Met_var_zdim_idx( 5) = 1
Met_var_zdim_idx( 7) = 2
IsLatLon_MetGrid = .true.
IsGlobal_MetGrid = .true.
IsRegular_MetGrid = .true.
nx_fullmet = 180
ny_fullmet = 91
allocate(x_fullmet_sp(0:nx_fullmet+1))
allocate(y_fullmet_sp(ny_fullmet))
allocate(MR_dx_met(nx_fullmet))
allocate(MR_dy_met(ny_fullmet))
dx_met_const = 2.0_sp
dy_met_const = 2.0_sp
x_start = 0.0_dp
y_start = 90.0_dp
do i = 0,nx_fullmet+1
x_fullmet_sp(i) = real(x_start + (i-1)*dx_met_const,kind=sp)
enddo
x_inverted = .false.
do i = 1,ny_fullmet
y_fullmet_sp(i) = real(y_start - (i-1)*dy_met_const,kind=sp)
enddo
y_inverted = .true.
do i = 1,nx_fullmet
MR_dx_met(i) = x_fullmet_sp(i+1)-x_fullmet_sp(i)
enddo
do i = 1,ny_fullmet-1
MR_dy_met(i) = y_fullmet_sp(i+1)-y_fullmet_sp(i)
enddo
MR_dy_met(ny_fullmet) = MR_dy_met(ny_fullmet-1)
elseif(MR_iversion.eq.3)then
! NOAA-CIRES reanalysis :: ds131.3
! In v.3, we have a Gaussian grid so we read in the values in
! MR_Read_Met_Times_netcdf
maxdimlen = 28
nlev_coords_detected = 2
allocate(nlevs_fullmet(nlev_coords_detected))
nlevs_fullmet(1) = 28
nlevs_fullmet(2) = 21
allocate(levs_code(nlev_coords_detected))
levs_code(1) = 1
levs_code(2) = 2
allocate(levs_fullmet_sp(nlev_coords_detected,maxdimlen))
np_fullmet = 28
allocate(p_fullmet_sp(np_fullmet))
levs_fullmet_sp(:,:) = 0.0_sp
p_fullmet_sp(1:np_fullmet) = &
(/1000.0_sp, 975.0_sp, 950.0_sp, 925.0_sp, 900.0_sp, &
850.0_sp, 800.0_sp, 750.0_sp, 700.0_sp, 650.0_sp, &
600.0_sp, 550.0_sp, 500.0_sp, 450.0_sp, 400.0_sp, &
350.0_sp, 300.0_sp, 250.0_sp, 200.0_sp, 150.0_sp, &
100.0_sp, 70.0_sp, 50.0_sp, 30.0_sp, 20.0_sp, &
10.0_sp, 5.0_sp, 1.0_sp /)
! Files from www.esrl.noaa.gov are bottom up
z_inverted = .false.
levs_fullmet_sp(1,1:28) = p_fullmet_sp(1:28)*Pressure_Conv_Fac
levs_fullmet_sp(2,1:21) = p_fullmet_sp(1:21)*Pressure_Conv_Fac
Met_var_zdim_idx( 1) = 1
Met_var_zdim_idx( 2) = 1
Met_var_zdim_idx( 3) = 1
Met_var_zdim_idx( 4) = 2
Met_var_zdim_idx( 5) = 1
Met_var_zdim_idx( 7) = 2
IsLatLon_MetGrid = .true.
IsGlobal_MetGrid = .true.
IsRegular_MetGrid = .false.
allocate(MR_dx_met(nx_fullmet))
allocate(MR_dy_met(ny_fullmet))
do i = 1,nx_fullmet
MR_dx_met(i) = x_fullmet_sp(i+1)-x_fullmet_sp(i)
enddo
do i = 1,ny_fullmet-1
MR_dy_met(i) = y_fullmet_sp(i+1)-y_fullmet_sp(i)
enddo
MR_dy_met(ny_fullmet) = MR_dy_met(ny_fullmet-1)
endif
elseif(MR_iwindformat.eq.29)then
! ECMWF ERA5
maxdimlen = 37
nlev_coords_detected = 1
allocate(nlevs_fullmet(nlev_coords_detected))
nlevs_fullmet(1) = 37
allocate(levs_code(nlev_coords_detected))
levs_code(1) = 1
allocate(levs_fullmet_sp(nlev_coords_detected,maxdimlen))
np_fullmet = 37
allocate(p_fullmet_sp(np_fullmet))
levs_fullmet_sp(:,:) = 0.0_sp
p_fullmet_sp(1:np_fullmet) = &
(/1000.0_sp, 975.0_sp, 950.0_sp, 925.0_sp, 900.0_sp, &
875.0_sp, 850.0_sp, 825.0_sp, 800.0_sp, 775.0_sp, &
750.0_sp, 700.0_sp, 650.0_sp, 600.0_sp, 550.0_sp, &
500.0_sp, 450.0_sp, 400.0_sp, 350.0_sp, 300.0_sp, &
250.0_sp, 225.0_sp, 200.0_sp, 175.0_sp, 150.0_sp, &
125.0_sp, 100.0_sp, 70.0_sp, 50.0_sp, 30.0_sp, &
20.0_sp, 10.0_sp, 7.0_sp, 5.0_sp, 3.0_sp, &
2.0_sp, 1.0_sp /)
z_inverted = .true.
levs_fullmet_sp(1,1:37) = p_fullmet_sp(1:37)*Pressure_Conv_Fac
Met_var_zdim_idx( 1) = 1
Met_var_zdim_idx( 2) = 1
Met_var_zdim_idx( 3) = 1
Met_var_zdim_idx( 4) = 1
Met_var_zdim_idx( 5) = 1
Met_var_zdim_idx( 7) = 1
IsLatLon_MetGrid = .true.
IsGlobal_MetGrid = .true.
IsRegular_MetGrid = .false.
allocate(MR_dx_met(nx_fullmet))
allocate(MR_dy_met(ny_fullmet))
do i = 1,nx_fullmet
MR_dx_met(i) = x_fullmet_sp(i+1)-x_fullmet_sp(i)
enddo
do i = 1,ny_fullmet-1
MR_dy_met(i) = y_fullmet_sp(i+1)-y_fullmet_sp(i)
enddo
MR_dy_met(ny_fullmet) = MR_dy_met(ny_fullmet-1)
elseif(MR_iwindformat.eq.30)then
! ECMWF ERA=20c
maxdimlen = 37
nlev_coords_detected = 1
allocate(nlevs_fullmet(nlev_coords_detected))
nlevs_fullmet(1) = 37
allocate(levs_code(nlev_coords_detected))
levs_code(1) = 1
allocate(levs_fullmet_sp(nlev_coords_detected,maxdimlen))
np_fullmet = 37
allocate(p_fullmet_sp(np_fullmet))
levs_fullmet_sp(:,:) = 0.0_sp
p_fullmet_sp(1:np_fullmet) = &
(/1000.0_sp, 975.0_sp, 950.0_sp, 925.0_sp, 900.0_sp, &
875.0_sp, 850.0_sp, 825.0_sp, 800.0_sp, 775.0_sp, &
750.0_sp, 700.0_sp, 650.0_sp, 600.0_sp, 550.0_sp, &
500.0_sp, 450.0_sp, 400.0_sp, 350.0_sp, 300.0_sp, &
250.0_sp, 225.0_sp, 200.0_sp, 175.0_sp, 150.0_sp, &
125.0_sp, 100.0_sp, 70.0_sp, 50.0_sp, 30.0_sp, &
20.0_sp, 10.0_sp, 7.0_sp, 5.0_sp, 3.0_sp, &
2.0_sp, 1.0_sp /)
z_inverted = .true.
levs_fullmet_sp(1,1:37) = p_fullmet_sp(1:37)*Pressure_Conv_Fac
Met_var_zdim_idx( 1) = 1
Met_var_zdim_idx( 2) = 1
Met_var_zdim_idx( 3) = 1
Met_var_zdim_idx( 4) = 1
Met_var_zdim_idx( 5) = 1
Met_var_zdim_idx( 7) = 1
IsLatLon_MetGrid = .true.
IsGlobal_MetGrid = .true.
IsRegular_MetGrid = .false.
allocate(MR_dx_met(nx_fullmet))
allocate(MR_dy_met(ny_fullmet))
do i = 1,nx_fullmet
MR_dx_met(i) = x_fullmet_sp(i+1)-x_fullmet_sp(i)
enddo
do i = 1,ny_fullmet-1
MR_dy_met(i) = y_fullmet_sp(i+1)-y_fullmet_sp(i)
enddo
MR_dy_met(ny_fullmet) = MR_dy_met(ny_fullmet-1)
else
stop 1
endif
idx = Met_var_zdim_idx(1)
p_fullmet_sp(1:nlevs_fullmet(idx)) = levs_fullmet_sp(idx,1:nlevs_fullmet(idx))
else ! MR_iwind not equal to 5
!-----------------------------------------------------------------------------------
! Start of all non-iwind=5 cases
if(MR_iwindformat.eq.50)then
! WRF files have a special reader, but we still need to set up
call MR_Get_WRF_grid
else ! MR_iwindformat .ne. 50
!---------------------------------------------------------------------------------
! Start of block for all non-iwind=5 and non-iwf=50
! This is where the Netcdf and Grib subroutines can be compared
!
! Checking for dimension length and values for x,y,t,p
! Assume all files have the same format
maxdimlen = 0
infile = adjustl(trim(MR_windfiles(1)))
nSTAT=nf90_open(adjustl(trim(infile)),NF90_NOWRITE, ncid)
if(nSTAT.ne.NF90_NOERR)call MR_NC_check_status(nSTAT,1,"nf90_open")
do ivar = 1,MR_MAXVARS
if (.not.Met_var_IsAvailable(ivar)) cycle ! Only look at variables that are available
if (Met_var_ndim(ivar).ne.4) cycle ! and only ones with a 'level' dimension
invar = Met_var_NC_names(ivar)
nSTAT = nf90_inq_varid(ncid,invar,in_var_id) ! get the var_id for this named variable
if(nSTAT.ne.NF90_NOERR)then
call MR_NC_check_status(nSTAT,0,"inq_varid")
write(MR_global_error,*)' Cannot find variable ',invar
write(MR_global_error,*)' Setting Met_var_IsAvailable to .false.'
Met_var_IsAvailable(ivar) = .false.
cycle
endif
nSTAT = nf90_inquire_variable(ncid, in_var_id, invar, &
xtype = var_xtype, &
ndims = var_ndims) ! get the number of dimensions
if(nSTAT.ne.NF90_NOERR)call MR_NC_check_status(nSTAT,1,"inq_variable")
if (var_ndims.ne.Met_var_ndim(ivar))then
write(MR_global_error,*)'MR ERROR: The actual number of dimensions differs from'
write(MR_global_error,*)' what is expected'
write(MR_global_error,*)' Variable : ',ivar,Met_var_NC_names(ivar)
write(MR_global_error,*)' Expected : ',Met_var_ndim(ivar)
write(MR_global_error,*)' Found : ',var_ndims
stop 1
endif
allocate(var_dimIDs(var_ndims))
nSTAT = nf90_inquire_variable(ncid, in_var_id, invar, &
dimids = var_dimIDs(:var_ndims))
if(nSTAT.ne.NF90_NOERR)call MR_NC_check_status(nSTAT,1,"inq_variable")
! 3-d transient variables should be in the COORDS convention (time, level, y, x)
! 4 3 2 1
! if ivar = 1 (Geopotential Height), then take this opportunity to get all
! the info on the dimensions for x,y and time. We will assume these
! are the same for all variables. Pressure levels will be read
! separately since they do differ among variables.
if(ivar.eq.1)then
i_dim = 1 ! get x info
nSTAT = nf90_inquire_dimension(ncid,var_dimIDs(i_dim), &
name = dimname, &
len = dimlen)
if(nSTAT.ne.NF90_NOERR)call MR_NC_check_status(nSTAT,1,"nf90_inquire_dimension X")
if(index(dimname,Met_dim_names(4)).ne.0)then
nx_fullmet = dimlen
xdim_id = var_dimIDs(i_dim)
endif
nSTAT = nf90_inq_varid(ncid,dimname,var_id) ! get the variable associated with this dim
if(nSTAT.ne.NF90_NOERR)call MR_NC_check_status(nSTAT,1,"inq_variable X")
! Check if we need to read into a float or a double
nSTAT = nf90_inquire_variable(ncid, var_id, dimname, xtype = var_xtype)
if(nSTAT.ne.NF90_NOERR)call MR_NC_check_status(nSTAT,1,"nf90_inquire_variable X")
allocate(x_fullmet_sp(0:nx_fullmet+1))
if(var_xtype.eq.NF90_FLOAT)then
allocate(dum1d_sp(dimlen))
nSTAT = nf90_get_var(ncid,var_id,dum1d_sp, &
start = (/1/),count = (/dimlen/))
if(nSTAT.ne.NF90_NOERR)call MR_NC_check_status(nSTAT,1,"get_var X flt")
! copy to local variable
x_fullmet_sp(1:nx_fullmet) = dum1d_sp(1:nx_fullmet)
deallocate(dum1d_sp)
elseif(var_xtype.eq.NF90_DOUBLE)then
allocate(dum1d_dp(dimlen))
nSTAT = nf90_get_var(ncid,var_id,dum1d_dp, &
start = (/1/),count = (/dimlen/))
if(nSTAT.ne.NF90_NOERR)call MR_NC_check_status(nSTAT,1,"get_var X dbl")
! copy to local variable
x_fullmet_sp(1:nx_fullmet) = real(dum1d_dp(1:nx_fullmet),kind=sp)
deallocate(dum1d_dp)
else
write(MR_global_error,*)'MR ERROR: Cannot recognize variable type for x'
stop 1
endif
! Check the units
nSTAT = nf90_Inquire_Attribute(ncid, var_id,&
"units",xtype, length, attnum)
if(nSTAT.ne.NF90_NOERR)then
call MR_NC_check_status(nSTAT,0,"nf90_Inquire_Attribute")
write(MR_global_error,*)'MR WARNING: cannot file units ',dimname,nf90_strerror(nSTAT)
write(MR_global_log ,*)'MR WARNING: cannot file units ',dimname,nf90_strerror(nSTAT)
else
nSTAT = nf90_get_att(ncid, var_id,"units",ustring)
call MR_NC_check_status(nSTAT,1,"nf90_get_att X units")
if(index(ustring,'km').gt.0.or.&
index(ustring,'kilo').gt.0)then
! This is a projected grid
IsLatLon_MetGrid = .false.
elseif(index(ustring,'deg').gt.0)then
! This is a lon/lat grid
IsLatLon_MetGrid = .true.
else
write(MR_global_error,*)"MR ERROR: Cannot determine if the grid is lon/lat or projected"
stop 1
endif
endif
! Finally, check for orientation
if(x_fullmet_sp(1).lt.x_fullmet_sp(2))then
x_inverted = .false.
else
x_inverted = .true.
endif
allocate(MR_dx_met(nx_fullmet))
x_start = x_fullmet_sp(1)
dx_met_const = x_fullmet_sp(2)-x_fullmet_sp(1)
x_fullmet_sp(0) = x_fullmet_sp(1) - dx_met_const
x_fullmet_sp(nx_fullmet+1) = x_fullmet_sp(nx_fullmet) + dx_met_const
if(abs(x_fullmet_sp(nx_fullmet+1)-360.0-x_fullmet_sp(1)).lt.0.1*dx_met_const)then
IsGlobal_MetGrid = .true.
else
IsGlobal_MetGrid = .false.
endif
do i = 1,nx_fullmet
MR_dx_met(i) = x_fullmet_sp(i+1)-x_fullmet_sp(i)
enddo
i_dim = 2 ! get y info
nSTAT = nf90_inquire_dimension(ncid,var_dimIDs(i_dim), &
name = dimname, &
len = dimlen)
call MR_NC_check_status(nSTAT,1,"nf90_inquire_dimension Y")
if(index(dimname,Met_dim_names(3)).ne.0)then
ny_fullmet = dimlen
ydim_id = var_dimIDs(i_dim)
endif
nSTAT = nf90_inq_varid(ncid,dimname,var_id) ! get the variable associated with this dim
call MR_NC_check_status(nSTAT,1,"nf90_inq_varid Y")
! Check if we need to read into a float or a double
nSTAT = nf90_inquire_variable(ncid, var_id, dimname, xtype = var_xtype)
call MR_NC_check_status(nSTAT,1,"nf90_inquire_variable Y")
allocate(y_fullmet_sp(ny_fullmet))
if(var_xtype.eq.NF90_FLOAT)then
allocate(dum1d_sp(dimlen))
nSTAT = nf90_get_var(ncid,var_id,dum1d_sp, &
start = (/1/),count = (/dimlen/))
call MR_NC_check_status(nSTAT,1,"nf90_get_var Y flt")
! copy to local variable
y_fullmet_sp(1:ny_fullmet) = dum1d_sp(1:ny_fullmet)
deallocate(dum1d_sp)
elseif(var_xtype.eq.NF90_DOUBLE)then
allocate(dum1d_dp(dimlen))
nSTAT = nf90_get_var(ncid,var_id,dum1d_dp, &
start = (/1/),count = (/dimlen/))
call MR_NC_check_status(nSTAT,1,"nf90_get_var Y dbl")
! copy to local variable
y_fullmet_sp(1:ny_fullmet) = real(dum1d_dp(1:ny_fullmet),kind=sp)
deallocate(dum1d_dp)
else
write(MR_global_error,*)'MR ERROR: Cannot recognize variable type for y'
stop 1
endif
! Check the units
nSTAT = nf90_Inquire_Attribute(ncid, var_id,&
"units",xtype, length, attnum)
if(nSTAT.ne.NF90_NOERR)then
call MR_NC_check_status(nSTAT,0,"nf90_Inquire_Attribute Y units")
write(MR_global_error,*)'MR WARNING: cannot file units ',dimname,nf90_strerror(nSTAT)
write(MR_global_log ,*)'MR WARNING: cannot file units ',dimname,nf90_strerror(nSTAT)
else
nSTAT = nf90_get_att(ncid, var_id,"units",ustring)
call MR_NC_check_status(nSTAT,1,"nf90_get_att Y units")
if(index(ustring,'km').gt.0.or.&
index(ustring,'kilo').gt.0)then
! This is a projected grid
IsLatLon_MetGrid = .false.
elseif(index(ustring,'deg').gt.0)then
! This is a lon/lat grid
IsLatLon_MetGrid = .true.
else
write(MR_global_error,*)"MR ERROR: Cannot determine if the grid is lon/lat or projected"
stop 1
endif
endif
! check for orientation
if(y_fullmet_sp(1).lt.y_fullmet_sp(2))then
y_inverted = .false.
else
y_inverted = .true.
endif
allocate(MR_dy_met(ny_fullmet))
y_start = y_fullmet_sp(1)
dy_met_const = y_fullmet_sp(2)-y_fullmet_sp(1)
do i = 1,ny_fullmet-1
MR_dy_met(i) = y_fullmet_sp(i+1)-y_fullmet_sp(i)
enddo
MR_dy_met(ny_fullmet) = MR_dy_met(ny_fullmet-1)
! We need to check if this is a regular grid
IsRegular_MetGrid = .true.
do i = 1,nx_fullmet-1
if(abs(MR_dx_met(i+1)-MR_dx_met(i)).gt.tol*MR_dx_met(i))then
IsRegular_MetGrid = .false.
endif
enddo
do i = 1,ny_fullmet-1
if(abs(MR_dy_met(i+1)-MR_dy_met(i)).gt.tol*MR_dy_met(i))then
IsRegular_MetGrid = .false.
endif
enddo
i_dim = 4 ! get t info
nSTAT = nf90_inquire_dimension(ncid,var_dimIDs(i_dim), &
name = dimname, &
len = dimlen)
call MR_NC_check_status(nSTAT,1,"nf90_inquire_dimension time")
if(index(dimname,Met_dim_names(1)).ne.0)then
nt_fullmet = dimlen
tdim_id = var_dimIDs(i_dim)
endif
endif ! ivar.eq.1
! Dimension variables for x,y,time were read while reading GPH, but
! we need the level information for all variables.
! Now checking level coordinates (pressure, height, depth);
! This is the third dimension for COORD compliant netcdf files.
i_dim = 3
nSTAT = nf90_inquire_dimension(ncid,var_dimIDs(i_dim), &
name = dimname, &
len = dimlen)
call MR_NC_check_status(nSTAT,1,"nf90_inquire_dimension P")
! Here is the master list of the known level names. For each
! variable, we check if the 'level' coordinate is new or already
! noted in this file, building an indexed list
nSTAT = nf90_inq_varid(ncid,dimname,var_id)
if(nSTAT.eq.NF90_NOERR.and. & ! This first condition excludes dims with no vars
(index(dimname,'lev').ne.0.or.&
index(dimname,'isobaric').ne.0.or.&
index(dimname,'isobaricInhPa').ne.0.or.&
index(dimname,'pressure').ne.0.or.&
index(dimname,'height').ne.0.or.&
index(dimname,'depth').ne.0.or.&
index(dimname,'lv_ISBL1').ne.0.or.&
index(dimname,'bottom_top').ne.0.or.&
index(dimname,'bottom_top_stag').ne.0.or.&
index(dimname,'soil_layers_stag').ne.0))then
! Log this level coordinate if it is the first
if (nlev_coords_detected.eq.0)then
nlev_coords_detected = nlev_coords_detected + 1
Met_var_zdim_idx(ivar) = nlev_coords_detected
Met_var_zdim_ncid(ivar) = var_dimIDs(i_dim)
maxdimlen = dimlen
else
! Otherwise, check if this level coordinate has already been logged
FoundOldDim = .false.
do iivar = 1,ivar-1
if (Met_var_zdim_ncid(iivar).eq.var_dimIDs(i_dim))then
FoundOldDim = .true.
Met_var_zdim_idx(ivar) = Met_var_zdim_idx(iivar)
Met_var_zdim_ncid(ivar) = var_dimIDs(i_dim)
exit
endif
enddo
if(.not.FoundOldDim)then
nlev_coords_detected = nlev_coords_detected + 1
Met_var_zdim_idx(ivar) = nlev_coords_detected
Met_var_zdim_ncid(ivar) = var_dimIDs(i_dim)
if (maxdimlen.lt.dimlen) maxdimlen = dimlen
endif
endif
else
call MR_NC_check_status(nSTAT,0,"nf90_inq_varid")
write(MR_global_error,*)'MR ERROR: level coordinate is not in pos. 3 for ',invar
write(MR_global_error,*)' Expected one of: lev, isobaric, pressure,'
write(MR_global_error,*)' height, depth, lv_ISBL1, bottom_top,'
write(MR_global_error,*)' bottom_top_stag, soil_layers_stag'
write(MR_global_error,*)' Instead, found: ',dimname
write(MR_global_log ,*)'MR ERROR: level coordinate is not in pos. 3 for ',invar
stop 1
endif
! tidy up
deallocate(var_dimIDs)
enddo ! ivar
! We have all the level dimension names and dim_ids; now we need to get the sizes
allocate(nlevs_fullmet(nlev_coords_detected))
allocate(levs_code(nlev_coords_detected))
allocate(levs_fullmet_sp(nlev_coords_detected,maxdimlen))
do ivar = 1,MR_MAXVARS
! Check if this variable has a z-dimension (pressure, height, depth, etc.)
if(Met_var_zdim_ncid(ivar).gt.0)then
! log the length of the dimension for this level coordinate
nSTAT = nf90_inquire_dimension(ncid,Met_var_zdim_ncid(ivar), &
name = dimname, &
len = dimlen)
call MR_NC_check_status(nSTAT,1,"nf90_inquire_dimension level")
idx = Met_var_zdim_idx(ivar)
nlevs_fullmet(idx) = dimlen
! Now inquire and populate the dimension variable info
nSTAT = nf90_inq_varid(ncid,dimname,var_id)
call MR_NC_check_status(nSTAT,1,"nf90_inq_varid level")
! Check if we need to read into a float or a double
nSTAT = nf90_inquire_variable(ncid, var_id, dimname, xtype = var_xtype)
call MR_NC_check_status(nSTAT,1,"nf90_inquire_variable level")
if(var_xtype.eq.NF90_FLOAT)then
allocate(dum1d_sp(dimlen))
nSTAT = nf90_get_var(ncid,var_id,dum1d_sp, &
start = (/1/),count = (/dimlen/))
call MR_NC_check_status(nSTAT,1,"nf90_get_var level flt")
! copy to local variable
levs_fullmet_sp(idx,1:nlevs_fullmet(idx)) = dum1d_sp(1:nlevs_fullmet(idx))
deallocate(dum1d_sp)
elseif(var_xtype.eq.NF90_DOUBLE)then
allocate(dum1d_dp(dimlen))
nSTAT = nf90_get_var(ncid,var_id,dum1d_dp, &
start = (/1/),count = (/dimlen/))
call MR_NC_check_status(nSTAT,1,"nf90_get_var level dbl")
! copy to local variable
levs_fullmet_sp(idx,1:nlevs_fullmet(idx)) = real(dum1d_dp(1:nlevs_fullmet(idx)),kind=sp)
deallocate(dum1d_dp)
endif
! Check the units
nSTAT = nf90_Inquire_Attribute(ncid, var_id,&
"units",xtype, length, attnum)
call MR_NC_check_status(nSTAT,0,"nf90_Inquire_Attribute level units")
if(nSTAT.ne.NF90_NOERR)then
write(MR_global_error,*)'MR ERROR: cannot find dim units ',dimname,nf90_strerror(nSTAT)
write(MR_global_log ,*)'MR ERROR: cannot find dim units ',dimname,nf90_strerror(nSTAT)
IsPressureDimension = .false.
stop 1
else
nSTAT = nf90_get_att(ncid, var_id,"units",ustring)
call MR_NC_check_status(nSTAT,1,"nf90_get_att level units")
! Note: the variables below are single-valued, not arrays on ivar
! If a pressure is found, the assumption here is that all pressure coordinates will
! be given in the same units (hPa or Pa) and the same orientations (bot to top, or
! inverted.
if(index(ustring,'Pa').gt.0.or.&
index(ustring,'millibar').gt.0)then
! This is a pressure level
IsPressureDimension = .true.
if(index(ustring,'hPa').gt.0.or.&
index(ustring,'millibar').gt.0)then
Pressure_Conv_Fac = 100.0_sp
else
Pressure_Conv_Fac = 1.0_sp
endif
elseif(index(ustring,'level').gt.0)then
! this is a special case for CAM files which are on hybrid levels
Pressure_Conv_Fac = 100.0_sp
IsPressureDimension = .true.
else
IsPressureDimension = .false.
endif
endif
! Finally, check for orientation
if(IsPressureDimension.and. & ! We are only concerned with orientation in pressure
nlevs_fullmet(idx).gt.1)then ! Neglect single-valued pressure coordinates
if(levs_fullmet_sp(idx,1).lt.levs_fullmet_sp(idx,2))then
z_inverted = .true.
else
z_inverted = .false.
endif
endif
endif
enddo ! ivar
! Close file
nSTAT = nf90_close(ncid)
call MR_NC_check_status(nSTAT,1,"nf90_close")
endif ! else part of (MR_iwindformat.eq.50)
!-----------------------------------------
! Now report on what we've found
write(MR_global_production,*)" Found these levels"
write(MR_global_production,*)" VaribleID LevelIdx dimID length"
do ivar = 1,MR_MAXVARS
if (Met_var_IsAvailable(ivar))then
if(Met_var_zdim_idx(ivar).eq.0)then
write(MR_global_production,*)ivar,Met_var_zdim_idx(ivar),&
Met_var_zdim_ncid(ivar),0
else
write(MR_global_production,*)ivar,Met_var_zdim_idx(ivar),&
Met_var_zdim_ncid(ivar),&
nlevs_fullmet(Met_var_zdim_idx(ivar))
endif
endif
enddo
#ifdef USEPOINTERS
if(.not.associated(p_fullmet_sp))then
#else
if(.not.allocated(p_fullmet_sp))then
#endif
! Now invert if necessary and convert to Pa
allocate(p_fullmet_sp(maxdimlen))
do idx = 1,nlev_coords_detected
if(z_inverted)then
do i = 1,nlevs_fullmet(idx)
p_fullmet_sp(nlevs_fullmet(idx)+1-i) = levs_fullmet_sp(idx,i)*Pressure_Conv_Fac
enddo
else
p_fullmet_sp(1:nlevs_fullmet(idx)) = levs_fullmet_sp(idx,1:nlevs_fullmet(idx))*Pressure_Conv_Fac
endif
levs_fullmet_sp(idx,:) = 0.0_sp
levs_fullmet_sp(idx,1:nlevs_fullmet(idx)) = p_fullmet_sp(1:nlevs_fullmet(idx))
enddo
deallocate(p_fullmet_sp)
endif
! The native vertical coordinate used in MetReader is that used for GPH.
! Here we check each of the vertical coordinates and note how they
! compare with that of GPH, assigning the following codes:
! 1 = same dim length: assume one-to-one mapping
! 2 = fewer levels: truncated version of GPH (doesn't extend as high)
! 3 = fewer levels: missing levels requiring interpolation
! 4 = more values than that of GPH
levs_code(1:nlev_coords_detected) = 0
levs_code(1) = 1 ! The first var checked (GPH) should have a one-to-one mapping
! Check how each of the pressure coordinates map onto the GPH grid
if (nlev_coords_detected.gt.1)then
! Only bother if there are multiple pressure coordinates
do idx = 2,nlev_coords_detected
if (nlevs_fullmet(idx).gt.nlevs_fullmet(1))then
! This coordinate has more values than the GPH pressure coordinate
levs_code(idx) = 4
elseif (nlevs_fullmet(idx).lt.nlevs_fullmet(1))then
! It there are fewer levels, check if this is a truncated coordinate (code = 2)
! or one with missing levels that requires interpolation (code = 3)
IsTruncatedDim = .true.
do i=1,nlevs_fullmet(idx)
if(abs(levs_fullmet_sp(idx,i)-levs_fullmet_sp(1,i)).gt.MR_EPS_SMALL)then
IsTruncatedDim = .false.
exit
endif
enddo
if(IsTruncatedDim)then
levs_code(idx) = 2
else
levs_code(idx) = 3
endif
else
! This coordinate has the same dimension as the GPH pressure coordinate.
! They are probably the same
levs_code(idx) = 1
endif
enddo
endif
! Now assign these levels to the working arrays
np_fullmet = nlevs_fullmet(Met_var_zdim_idx(1)) ! Assign fullmet the length of H,U,V
! Geopotential
#ifdef USEPOINTERS
if(.not.associated(p_fullmet_sp)) allocate(p_fullmet_sp(np_fullmet))
#else
if(.not.allocated(p_fullmet_sp)) allocate(p_fullmet_sp(np_fullmet))
#endif
idx = Met_var_zdim_idx(1)
p_fullmet_sp(1:nlevs_fullmet(idx)) = levs_fullmet_sp(idx,1:nlevs_fullmet(idx))
endif ! else part of (MR_iwind.eq.5)
!---------------------------------------------------------------------------------
if(MR_iwindformat.eq.0)then
! Template windfile (example for nam198)
! Need to populate
call MR_Set_Met_Dims_Template_netcdf
endif
allocate(z_approx(np_fullmet))
do k=1,np_fullmet
! Calculate heights for US Std Atmos while pressures are still in mbars
! or hPa
z_approx(k) = MR_Z_US_StdAtm(p_fullmet_sp(k))
enddo
MR_Max_geoH_metP_predicted = z_approx(np_fullmet)
write(MR_global_info,*)"Dimension info:"
write(MR_global_info,*)" record (time): ",nt_fullmet
write(MR_global_info,*)" level (z) : ",np_fullmet
write(MR_global_info,*)" y : ",ny_fullmet
write(MR_global_info,*)" x : ",nx_fullmet
!************************************************************************
! assign boundaries of mesoscale model
if(x_inverted)then
! I know of no windfiles with x-coordinate reversed
xLL_fullmet = x_fullmet_sp(nx_fullmet)
xUR_fullmet = x_fullmet_sp(1)
else
xLL_fullmet = x_fullmet_sp(1)
xUR_fullmet = x_fullmet_sp(nx_fullmet)
endif
if(y_inverted)then
! Most lon/lat grids have y reversed
yLL_fullmet = y_fullmet_sp(ny_fullmet)
yUR_fullmet = y_fullmet_sp(1)
else
! Projected grids have y not reversed
yLL_fullmet = y_fullmet_sp(1)
yUR_fullmet = y_fullmet_sp(ny_fullmet)
endif
if(MR_VERB.ge.2)then
write(MR_global_production,*)"--------------------------------------------------------------------------------"
endif
end subroutine MR_Read_Met_DimVars_netcdf
!##############################################################################
!##############################################################################
!
! MR_Get_WRF_grid
!
! Called once from MR_Read_Met_DimVars_netcdf
!
! This subroutine reads the variable and dimension IDs, and fills the
! coordinate dimension variables, just like MR_Read_Met_DimVars_netcdf,
! but WRF files are a bit more complicated than most since the grid/projection can
! vary and state variables (U,V,W,Gph) are each on grids staggered in the
! relevant direction.
!
! After this subroutine completes, the following variables will be set:
! All the projection parameters of NWP grid
! Met_dim_names, Met_var_NC_names, Met_var_conversion_factor, Met_var_IsAvailable
! The lengths of all the dimensions of the file
! p_fullmet_sp (converted to Pa)
! x_fullmet_sp, y_fullmet_sp
! IsLatLon_MetGrid, IsGlobal_MetGrid, IsRegular_MetGrid
!
!##############################################################################
subroutine MR_Get_WRF_grid
use MetReader
use netcdf
use projection
implicit none
integer, parameter :: sp = 4 ! single precision
integer, parameter :: dp = 8 ! double precision
integer :: nSTAT
integer :: ncid
character(len = nf90_max_name) :: name_dum
integer :: t_dim_id = 0 ! x or lon
integer :: x_dim_id = 0 ! x or lon
integer :: y_dim_id = 0 ! y or lat
integer :: z_dim_id = 0 ! x or lon
integer :: lon_var_id
integer :: lat_var_id
integer :: PB_var_id
integer :: Ppert_var_id
integer :: Map_Proj
real(kind=sp) :: WRF_dx,WRF_dy