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mk_ofuro_nc_annual_cera20c_v1.1.f
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c mk_ofuro_nc_annual_cera20c_v1.1.f
c
c This is a sample program to create netCDF file
c for CERA20C ANNUAL MEAN 1DEG grid variable for a year
c
c PARAMETERS
c VVAARR: Variable Name (QA, LHF...)
c UUNNIITT: unit (g/kg, w/m^2)
c LLOONNGG: Long name (J-OFURO3 QA V1.0)
c IINNPPUUTT: Input file (a binary file must have "YYYY.bin")
c OOUUTTPPUUTT: Input file (a netCDF file must have "YYYY.nc")
c YYYY: Year (2008)
c UUNNIITT: unit (g/kg, w/m^2)
c-----------------------------------------------------------------------
C This is part of the netCDF package.
C Copyright 2006 University Corporation for Atmospheric Research/Unidata.
C See COPYRIGHT file for conditions of use.
C This is an example program which writes some 4D pressure and
C temperatures. It is intended to illustrate the use of the netCDF
C fortran 77 API. The companion program pres_temp_4D_rd.f shows how
C to read the netCDF data file created by this program.
C This program is part of the netCDF tutorial:
C http://www.unidata.ucar.edu/software/netcdf/docs/netcdf-tutorial
C Full documentation of the netCDF Fortran 77 API can be found at:
C http://www.unidata.ucar.edu/software/netcdf/docs/netcdf-f77
C $Id: pres_temp_4D_wr.f,v 1.11 2007/01/24 19:45:09 russ Exp $
program mk_ofuro_nc_annual_v1
implicit none
include 'netcdf.inc'
C This is the name of the data file we will create.
character*100 FILE_NAME
integer ncid
C We are writing 4D data, a 2 x 6 x 12 lvl-lat-lon grid, with 2
C timesteps of data.
integer NDIMS, NRECS
parameter (NDIMS = 3, NRECS = 1)
integer NLATS, NLONS
parameter (NLATS = 181, NLONS = 360)
character*(*) LAT_NAME, LON_NAME, REC_NAME
parameter (LAT_NAME = 'latitude', LON_NAME = 'longitude')
parameter (REC_NAME = 'time')
integer lon_dimid, lat_dimid, rec_dimid
C The start and count arrays will tell the netCDF library where to
C write our data.
integer start(NDIMS), count(NDIMS)
C These program variables hold the latitudes and longitudes.
real lats(NLATS), lons(NLONS)
integer lon_varid, lat_varid
c time
real recs(NRECS)
integer rec_varid
C We will create two netCDF variables, one each for temperature and
C pressure fields.
character*(*) LONG_NAME
parameter(LONG_NAME = 'long_name')
character*(*) VAR_NAME, VAR_NAME_LONG
parameter (VAR_NAME='VVAARR',
+ VAR_NAME_LONG='LLOONNGG')
integer var_varid
integer dimids(NDIMS)
C We recommend that each variable carry a "units" attribute.
character*(*) UNITS
parameter (UNITS = 'units')
character*(*) VAR_UNITS, LAT_UNITS, LON_UNITS, REC_UNITS
parameter (VAR_UNITS = 'UUNNIITT')
parameter (LAT_UNITS = 'degrees_north')
parameter (LON_UNITS = 'degrees_east')
parameter (REC_UNITS = 'days since YYYY-01-01')
c Time origin
character*(*) TORG
parameter (TORG='time_origin')
character*(*) TIME_ORG
parameter (TIME_ORG = '15-Jan-1901')
c SPV (missing value)
character*(*) MISSING
parameter (MISSING = 'missing_value')
real spv
parameter(spv=-9999.0)
C Program variables to hold the data we will write out. We will only
C need enough space to hold one timestep of data; one record.
real var_out(NLONS, NLATS)
c FOR input files
character*100 fni
integer i,j
C Use these to construct some latitude and longitude data for this
C example.
integer START_LAT, START_LON
parameter (START_LAT = -90.0, START_LON = 0.0)
C Loop indices.
integer lvl, lat, lon, rec1
C Error handling.
integer retval
c For monthly data
integer jd, jdmon(12)
data jdmon/31,28,31,30,31,30,31,31,30,31,30,31/
C Create pretend data. If this wasn't an example program, we would
C have some real data to write, for example, model output.
do lat = 1, NLATS
lats(lat) = START_LAT + (lat - 1) * 0.25
end do
do lon = 1, NLONS
lons(lon) = START_LON+(0.25/2) + (lon - 1) * 0.25
end do
jd = 0
do rec1 = 1,NRECS
if (mod(YYYY,4).eq.0) then
jdmon(2)=29
else
jdmon(2)=28
endif
recs(rec1) = rec1 -1 + jd
jd = jd + jdmon(rec1) - 1
c write(6,*) real(recs(rec1))
enddo
c
c Open output data file
FILE_NAME="OOUUTTPPUUTT"
c Open input data file
fni="./IINNPPUUTT"
open(50,file=fni,form="unformatted")
C Create the file.
retval = nf_create(FILE_NAME, nf_clobber, ncid)
if (retval .ne. nf_noerr) call handle_err(retval)
C Define the dimensions. The record dimension is defined to have
C unlimited length - it can grow as needed. In this example it is
C the time dimension.
retval = nf_def_dim(ncid, LAT_NAME, NLATS, lat_dimid)
if (retval .ne. nf_noerr) call handle_err(retval)
retval = nf_def_dim(ncid, LON_NAME, NLONS, lon_dimid)
if (retval .ne. nf_noerr) call handle_err(retval)
retval = nf_def_dim(ncid, REC_NAME, NRECS, rec_dimid)
if (retval .ne. nf_noerr) call handle_err(retval)
C Define the coordinate variables. We will only define coordinate
C variables for lat and lon. Ordinarily we would need to provide
C an array of dimension IDs for each variable's dimensions, but
C since coordinate variables only have one dimension, we can
C simply provide the address of that dimension ID (lat_dimid) and
C similarly for (lon_dimid).
retval = nf_def_var(ncid, LAT_NAME, NF_REAL, 1, lat_dimid,
+ lat_varid)
if (retval .ne. nf_noerr) call handle_err(retval)
retval = nf_def_var(ncid, LON_NAME, NF_REAL, 1, lon_dimid,
+ lon_varid)
if (retval .ne. nf_noerr) call handle_err(retval)
retval = nf_def_var(ncid, REC_NAME, NF_REAL, 1, rec_dimid,
+ rec_varid)
if (retval .ne. nf_noerr) call handle_err(retval)
C Assign units attributes to coordinate variables.
retval = nf_put_att_text(ncid, lat_varid, UNITS, len(LAT_UNITS),
+ LAT_UNITS)
if (retval .ne. nf_noerr) call handle_err(retval)
retval = nf_put_att_text(ncid, lon_varid, UNITS, len(LON_UNITS),
+ LON_UNITS)
if (retval .ne. nf_noerr) call handle_err(retval)
retval = nf_put_att_text(ncid, rec_varid, UNITS, len(REC_UNITS),
+ REC_UNITS)
if (retval .ne. nf_noerr) call handle_err(retval)
c Assign time_origin
c retval = nf_put_att_text(ncid, rec_varid, TORG, len(TIME_ORG),
c + TIME_ORG)
c if (retval .ne. nf_noerr) call handle_err(retval)
C The dimids array is used to pass the dimids of the dimensions of
C the netCDF variables. Both of the netCDF variables we are creating
C share the same four dimensions. In Fortran, the unlimited
C dimension must come last on the list of dimids.
dimids(1) = lon_dimid
dimids(2) = lat_dimid
dimids(3) = rec_dimid
C Define the netCDF variables for the var_name data.
retval = nf_def_var(ncid, VAR_NAME, NF_REAL, NDIMS, dimids,
+ var_varid)
if (retval .ne. nf_noerr) call handle_err(retval)
C Assign units attributes to the netCDF variables.
retval = nf_put_att_text(ncid, var_varid, UNITS, len(VAR_UNITS),
+ VAR_UNITS)
if (retval .ne. nf_noerr) call handle_err(retval)
c write(6,*) "OK 1"
C Assign long_name attributes to the netCDF variables.
retval = nf_put_att_text(ncid, var_varid,
+ LONG_NAME, len(VAR_NAME_LONG),
+ VAR_NAME_LONG)
if (retval .ne. nf_noerr) call handle_err(retval)
c Assign missing_value attributes to the netCDF variables.
retval = nf_put_att_real(ncid, var_varid, MISSING,NF_FLOAT, 1,
+ spv)
if (retval .ne. nf_noerr) call handle_err(retval)
c write(6,*) "OK 4"
C End define mode.
retval = nf_enddef(ncid)
if (retval .ne. nf_noerr) call handle_err(retval)
C Write the coordinate variable data. This will put the latitudes
C and longitudes of our data grid into the netCDF file.
retval = nf_put_var_real(ncid, lat_varid, lats)
if (retval .ne. nf_noerr) call handle_err(retval)
retval = nf_put_var_real(ncid, lon_varid, lons)
if (retval .ne. nf_noerr) call handle_err(retval)
retval = nf_put_var_real(ncid, rec_varid, recs)
if (retval .ne. nf_noerr) call handle_err(retval)
c write(6,*) "OK 5"
C These settings tell netcdf to write one timestep of data. (The
C setting of start(4) inside the loop below tells netCDF which
C timestep to write.)
count(1) = NLONS
count(2) = NLATS
count(3) = 1
start(1) = 1
start(2) = 1
C Write the pretend data. This will write our surface pressure and
C surface temperature data. The arrays only hold one timestep worth
C of data. We will just rewrite the same data for each timestep. In
C a real application, the data would change between timesteps.
do rec1 = 1, NRECS
start(3) = rec1
do j=1,NLATS
read(50)(var_out(i,j),i=1,NLONS)
enddo
retval = nf_put_vara_real(ncid, var_varid, start, count,
+ var_out)
if (retval .ne. nf_noerr) call handle_err(retval)
end do
C Close the file. This causes netCDF to flush all buffers and make
C sure your data are really written to disk.
retval = nf_close(ncid)
if (retval .ne. nf_noerr) call handle_err(retval)
print *,'*** SUCCESS writing example file', FILE_NAME, '!'
end
subroutine handle_err(errcode)
implicit none
include 'netcdf.inc'
integer errcode
print *, 'Error: ', nf_strerror(errcode)
stop 2
end