source: palm/trunk/UTIL/inifor/src/get_netcdf_variable.inc @ 3183

Last change on this file since 3183 was 3183, checked in by suehring, 3 years ago

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1!> @file src/get_netcdf_variable.inc
2!------------------------------------------------------------------------------!
3! This file is part of the PALM model system.
4!
5! PALM is free software: you can redistribute it and/or modify it under the
6! terms of the GNU General Public License as published by the Free Software
7! Foundation, either version 3 of the License, or (at your option) any later
8! version.
9!
10! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
11! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
12! A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
13!
14! You should have received a copy of the GNU General Public License along with
15! PALM. If not, see <http://www.gnu.org/licenses/>.
16!
17! Copyright 2017-2018 Leibniz Universitaet Hannover
18! Copyright 2017-2018 Deutscher Wetterdienst Offenbach
19!------------------------------------------------------------------------------!
20!
21! Current revisions:
22! -----------------
23!
24!
25! Former revisions:
26! -----------------
27! $Id$
28! Initial revision
29!
30!
31!
32!
33!
34!
35! Authors:
36! --------
37! @author Eckhard Kadasch
38!
39! Description:
40! ------------
41!> This file provides the implementation of the io.f90 subroutines
42!> get_netcdf_variable_int() and get_netcdf_variable_real(). Both routines
43!> differ only in the type of the netCDF variable to be read and otherwise share
44!> their functionality. In order to avoid duplicating code, both routines source
45!> the implementation below using Fortran's INCLUDE statement.
46!>
47!------------------------------------------------------------------------------!
48 INTEGER ::  i, ncid, start(3)
49
50 ! Read in_var NetCDF attributes
51 IF ( nf90_open( TRIM(in_file), NF90_NOWRITE, ncid ) .EQ. NF90_NOERR .AND. &
52      nf90_inq_varid( ncid, in_var % name, in_var % varid ) .EQ. NF90_NOERR )  THEN
53
54    CALL check(nf90_get_att(ncid, in_var % varid, "long_name", in_var % long_name))
55    CALL check(nf90_get_att(ncid, in_var % varid, "units", in_var % units))
56
57    ! Read in_var NetCDF dimensions
58    CALL check(nf90_inquire_variable( ncid, in_var % varid,              &
59                                      ndims  = in_var % ndim,            &
60                                      dimids = in_var % dimids ))
61                                 
62    DO i = 1, in_var % ndim
63       CALL check(nf90_inquire_dimension( ncid, in_var % dimids(i),      &
64                                          name = in_var % dimname(i),    &
65                                          len  = in_var % dimlen(i) ))
66    END DO
67
68    start = (/ 1, 1, 1 /)
69    IF ( TRIM(in_var % name) .EQ. 'T_SO' )  THEN
70       ! Skip depth = 0.0 for T_SO and reduce number of depths from 9 to 8
71       in_var % dimlen(3) = in_var % dimlen(3) - 1
72
73       ! Start reading from second level, e.g. depth = 0.005 instead of 0.0
74       start(3) = 2
75    END IF
76
77    SELECT CASE(in_var % ndim)
78
79    CASE (2)
80
81       ALLOCATE( buffer( in_var % dimlen(1),                             &
82                         in_var % dimlen(2),                             &
83                         1 ) )
84
85    CASE (3, 4)
86
87       ALLOCATE( buffer( in_var % dimlen(1),                             &
88                         in_var % dimlen(2),                             &
89                         in_var % dimlen(3) ) )
90
91    CASE DEFAULT
92
93       message = "Failed reading NetCDF variable " //                    &
94          TRIM(in_var % name) // " with " // TRIM(str(in_var%ndim)) //   &
95          " dimensions because only two- and and three-dimensional" //   &
96          " variables are supported."
97       CALL abort('get_netcdf_variable', message)
98
99    END SELECT
100 CALL run_control('time', 'alloc')
101         
102    ! TODO: Check for matching dimensions of buffer and var
103    CALL check(nf90_get_var( ncid, in_var % varid, buffer,               &
104                             start = start,                              &
105                             count = in_var % dimlen(1:3) ) )
106
107 CALL run_control('time', 'read')
108 ELSE
109
110    message = "Failed to read '" // TRIM(in_var % name) // &
111       "' from file '" // TRIM(in_file) // "'."
112    CALL report('get_netcdf_variable', message)
113
114 END IF
115
116 CALL check(nf90_close(ncid))
117
118 CALL run_control('time', 'read')
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