PROGRAM read_palm_netcdf_data !------------------------------------------------------------------------------! ! This file is part of the PALM model system. ! ! PALM is free software: you can redistribute it and/or modify it under the ! terms of the GNU General Public License as published by the Free Software ! Foundation, either version 3 of the License, or (at your option) any later ! version. ! ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY ! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR ! A PARTICULAR PURPOSE. See the GNU General Public License for more details. ! ! You should have received a copy of the GNU General Public License along with ! PALM. If not, see . ! ! Copyright 1997-2020 Leibniz Universitaet Hannover !------------------------------------------------------------------------------! ! ! Current revisions: ! ----------------- ! ! ! Former revisions: ! ----------------- ! $Id: read_palm_netcdf_data.f90 4481 2020-03-31 18:55:54Z hellstea $ ! Corrected "Former revisions" section ! ! 2696 2017-12-14 17:12:51Z kanani ! Change in file header (GPL part) ! ! 1310 2014-03-14 08:01:56Z raasch ! update of GPL copyright ! ! 1046 2012-11-09 14:38:45Z maronga ! code put under GPL (PALM 3.9) ! ! Description: ! ------------ ! This is an example program for reading PALM 2d/3d NetCDF datasets ! ! The user has to add his own code for further storing and analyzing of ! these data!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ! ! The NetCDF include file and library has to be given with the respective ! compiler options. Please find out the respective paths on your system and ! set them appropriately. ! ! Here are some examples how this routine should be compiled: ! ! decalpha: ! f95 -fast -r8 -I/usr/local/netcdf-3.5.1/include ! -L/usr/local/netcdf-3.5.1/lib -lnetcdf ! IBM-Regatta: ! xlf95 -qrealsize=8 -q64 -qmaxmem=-1 -Q ! -I /aws/dataformats/netcdf-3.6.0-p1/64-32/include ! -L/aws/dataformats/netcdf-3.6.0-p1/64-32/lib -lnetcdf -O3 ! IBM-Regatta KISTI: ! xlf95 -qrealsize=8 -q64 -qmaxmem=-1 -Q ! -I /applic/netcdf64/src/f90 ! -L/applic/lib/NETCDF64 -lnetcdf -O3 ! IBM-Regatta Yonsei (gfdl5): ! xlf95 -qrealsize=8 -q64 -qmaxmem=-1 -Q ! -I /usr1/users/raasch/pub/netcdf-3.6.0-p1/include ! -L/usr1/users/raasch/pub/netcdf-3.6.0-p1/lib -lnetcdf -O3 ! IMUK: ! ifort read_palm...f90 -o read_palm...x ! -I /muksoft/packages/netcdf/linux/include -axW -r8 -nbs ! -Vaxlib -L /muksoft/packages/netcdf/linux/lib -lnetcdf ! NEC-SX6: ! sxf90 read_palm...f90 -o read_palm...x ! -I /pool/SX-6/netcdf/netcdf-3.6.0-p1/include -C hopt -Wf '-A idbl4' ! -L/pool/SX-6/netcdf/netcdf-3.6.0-p1/lib -lnetcdf !------------------------------------------------------------------------------! USE netcdf IMPLICIT NONE ! !-- Local variables CHARACTER (LEN=10) :: dimname(4), var_name CHARACTER (LEN=40) :: filename CHARACTER (LEN=2000) :: title, var_list INTEGER :: i, j, k, nc_stat, pos, time_step INTEGER :: current_level, current_var, id_set, id_var_time, num_var INTEGER, DIMENSION(4) :: id_dims, id_dims_loc, levels INTEGER, DIMENSION(1000) :: id_var REAL :: time(1) REAL, DIMENSION(:,:,:), ALLOCATABLE :: data_array PRINT*, '*** Please type NetCDF filename to be read:' READ*, filename nc_stat = NF90_OPEN( filename, NF90_WRITE, id_set ) IF ( nc_stat /= NF90_NOERR ) CALL handle_netcdf_error( 1 ) ! !-- Get the run description header and output title = ' ' nc_stat = NF90_GET_ATT( id_set, NF90_GLOBAL, 'title', title ) IF ( nc_stat /= NF90_NOERR ) CALL handle_netcdf_error( 2 ) WRITE (*,'(/A/A)') '*** file created by:', TRIM( title ) ! !-- Get the list of variables (order of variables corresponds with the !-- order of data on the binary file) var_list = ' ' ! GET_ATT does not assign trailing blanks nc_stat = NF90_GET_ATT( id_set, NF90_GLOBAL, 'VAR_LIST', var_list ) IF ( nc_stat /= NF90_NOERR ) CALL handle_netcdf_error( 3 ) ! !-- Inquire id of the time coordinate variable nc_stat = NF90_INQ_VARID( id_set, 'time', id_var_time ) IF ( nc_stat /= NF90_NOERR ) CALL handle_netcdf_error( 4 ) ! !-- Count number of variables; there is one more semicolon in the !-- string than variable names num_var = -1 DO i = 1, LEN( var_list ) IF ( var_list(i:i) == ';' ) num_var = num_var + 1 ENDDO WRITE (*,'(/A,I3,A/)') '*** file contains ', num_var, ' variable(s)' pos = INDEX( var_list, ';' ) ! !-- Loop over all variables DO i = 1, num_var ! !-- Extract variable name from list var_list = var_list(pos+1:) pos = INDEX( var_list, ';' ) var_name = var_list(1:pos-1) ! !-- Get variable ID from name nc_stat = NF90_INQ_VARID( id_set, TRIM( var_name ), id_var(i) ) IF ( nc_stat /= NF90_NOERR ) CALL handle_netcdf_error( 5 ) ! !-- Inquire the dimension IDs nc_stat = NF90_INQUIRE_VARIABLE( id_set, id_var(i), & dimids = id_dims_loc ) IF ( nc_stat /= NF90_NOERR ) CALL handle_netcdf_error( 6 ) id_dims = id_dims_loc ! !-- Get number of x/y/z/time levels(gridpoints) for that variable DO j = 1, 4 nc_stat = NF90_INQUIRE_DIMENSION( id_set, id_dims(j),& dimname(j), levels(j) ) IF ( nc_stat /= NF90_NOERR ) CALL handle_netcdf_error( 7 ) ENDDO WRITE (*,100) '*** reading variable "', TRIM(var_name), & '", dimensioned as', TRIM(var_name), levels(1)-1, & levels(2)-1, levels(3)-1 100 FORMAT (A,A,A/4X,A,'(0:',I4,',0:',I4,',0:',I4,') (x/y/z)'/) ! !-- Allocate the data array to be read ALLOCATE( data_array(0:levels(1)-1,0:levels(2)-1,0:levels(3)-1) ) ! !-- Read the data from file for each timestep DO j = 1, levels(4) ! !-- Get the time of the current timelevel and output nc_stat = NF90_GET_VAR( id_set, id_var_time, time, start = (/ j /), & count = (/ 1 /) ) IF ( nc_stat /= NF90_NOERR ) CALL handle_netcdf_error( 7+i ) WRITE (*,'(A,I3,A,F8.1,A)') ' reading timelevel ', i, & ' time = ', time(1), ' s' nc_stat = NF90_GET_VAR( id_set, id_var(i), & data_array, start = (/ 1, 1, 1, j /), & count = (/ levels(1), levels(2), levels(3), 1 /) ) IF ( nc_stat /= NF90_NOERR ) & CALL handle_netcdf_error( 7+levels(4)+i ) ! !-- ADD YOUR OWN CODE FOR FURTHER STORING OF THESE DATA HERE !-- -------------------------------------------------------- ENDDO WRITE (*,'(/)') DEALLOCATE( data_array ) ENDDO CONTAINS SUBROUTINE handle_netcdf_error( errno ) ! !-- Prints out a text message corresponding to the current NetCDF status IMPLICIT NONE INTEGER, INTENT(IN) :: errno IF ( nc_stat /= NF90_NOERR ) THEN WRITE (*,'(A,1X,I3/4X,A)') & '+++ read_palm_netcdf_data error handle:', & errno, TRIM( nf90_strerror( nc_stat ) ) STOP ENDIF END SUBROUTINE handle_netcdf_error END PROGRAM read_palm_netcdf_data