eccodes/examples/F90/grib_get_pv.f90

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! (C) Copyright 2005- ECMWF.
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!
! This software is licensed under the terms of the Apache Licence Version 2.0
! which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
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!
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! In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
! virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
!
!
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! Description: How to get PV values.
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!
!
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program grib_get_pv
use eccodes
implicit none
integer :: infile
integer :: igrib
integer :: PVPresent, nb_pv
real(kind=4), dimension(:), allocatable :: pv
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call codes_open_file(infile, '../../data/reduced_gaussian_model_level.grib1', 'r')
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! A new GRIB message is loaded from file
! igrib is the message id to be used in subsequent calls
call codes_grib_new_from_file(infile, igrib)
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! Get PVPresent to see if the 'pv' array is there
call codes_get(igrib, 'PVPresent', PVPresent)
print *, "PVPresent = ", PVPresent
if (PVPresent == 1) then
call codes_get_size(igrib, 'pv', nb_pv)
print *, "There are ", nb_pv, " PV values"
allocate (pv(nb_pv))
call codes_get(igrib, 'pv', pv)
print *, "pv = ", pv
deallocate (pv)
else
print *, "There is no PV values in your GRIB message!"
end if
call codes_release(igrib)
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call codes_close_file(infile)
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end program grib_get_pv