source: LMDZ6/branches/LMDZ_ECRad/libf/phylmd/press_coefoz_m.F90 @ 5411

Last change on this file since 5411 was 4179, checked in by lguez, 3 years ago

Use an external updated NetCDF95 library

Remove NetCDF95 from source files. We want to use an up-to-date
NetCDF95 library to read a NetCDF file containing groups, for aerosol
optical properties. It seems complicated to keep the NetCDF95 library
inside LMDZ because:

  • NetCDF95 now also needs a C compiler. I do not know how to make this work with FCM.


  • NetCDF95 cannot be compiled with the -r8 option: some specific procedures in a generic interface become identical.


  • Secondarily, we would have to change the names of files to adhere to the LMDZ standard. We are not glad to do that every time we update.


For now, we can compile using the options -include and -link of
makelmdz_fcm.

As we use an updated NetCDF95 library, we have to update some of the
calls in LMDZ. Those are the calls to nf95_inquire_variable and
nf95_gw_var which used to take a pointer argument and now take an
allocatable argument.
  • Property copyright set to
    Name of program: LMDZ
    Creation date: 1984
    Version: LMDZ5
    License: CeCILL version 2
    Holder: Laboratoire de m\'et\'eorologie dynamique, CNRS, UMR 8539
    See the license file in the root directory
File size: 2.1 KB
Line 
1! $Id$
2module press_coefoz_m
3
4  implicit none
5
6  real, allocatable, save:: plev(:)
7  ! (pressure level of Mobidic input data, converted to Pa, in strictly
8  ! ascending order)
9
10  real, allocatable, save:: press_in_edg(:)
11  ! (edges of pressure intervals for Mobidic input data, in Pa, in strictly
12  ! ascending order)
13
14contains
15
16  subroutine press_coefoz
17
18    ! This procedure is called once per "gcm" run.
19    ! A single thread of the root process reads the pressure levels
20    ! from "coefoz_LMDZ.nc" and broadcasts them to the other processes.
21
22    ! We assume that, in "coefoz_LMDZ.nc", the pressure levels are in hPa
23    ! and in strictly ascending order.
24
25    use netcdf95, only: nf95_open, nf95_close, nf95_gw_var, nf95_inq_varid
26    use netcdf, only: nf90_nowrite
27
28    use mod_phys_lmdz_mpi_data, only: is_mpi_root
29    use mod_phys_lmdz_mpi_transfert, only: bcast_mpi ! broadcast
30
31    ! Variables local to the procedure:
32    integer ncid, varid ! for NetCDF
33    integer n_plev ! number of pressure levels in the input data
34    integer k
35
36    !---------------------------------------
37
38    !$omp single
39    print *, "Call sequence information: press_coefoz"
40
41    if (is_mpi_root) then
42       call nf95_open("coefoz_LMDZ.nc", nf90_nowrite, ncid)
43
44       call nf95_inq_varid(ncid, "plev", varid)
45       call nf95_gw_var(ncid, varid, plev)
46       ! Convert from hPa to Pa because "paprs" and "pplay" are in Pa:
47       plev = plev * 100.
48       n_plev = size(plev)
49
50       call nf95_close(ncid)
51    end if
52
53    call bcast_mpi(n_plev)
54    if (.not. is_mpi_root) allocate(plev(n_plev))
55    call bcast_mpi(plev)
56   
57    ! Compute edges of pressure intervals:
58    allocate(press_in_edg(n_plev + 1))
59    if (is_mpi_root) then
60       press_in_edg(1) = 0.
61       ! We choose edges halfway in logarithm:
62       DO k = 2,n_plev
63          press_in_edg(k) = SQRT(plev(k - 1) * plev(k))
64       ENDDO
65       press_in_edg(n_plev + 1) = huge(0.)
66       ! (infinity, but any value guaranteed to be greater than the
67       ! surface pressure would do)
68    end if
69    call bcast_mpi(press_in_edg)
70    !$omp end single
71
72  end subroutine press_coefoz
73
74end module press_coefoz_m
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