Difference between revisions of "OpenIFS"
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Output fields generated by openIFS are: | Output fields generated by openIFS are: | ||
+ | <pre>ICMSHepc8+000000 | ||
− | + | ICMGGepc8+000000</pre> | |
− | |||
− | ICMGGepc8+000000 | ||
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You may convert these GRIB files to netCDF using cdo; for instance on sverdrup: | You may convert these GRIB files to netCDF using cdo; for instance on sverdrup: | ||
+ | <pre>module load cdo/1.6.5.1 | ||
− | + | cdo -t ecmwf -f nc copy ICMSHepc8+000000 ICMSHepc8+000000.nc</pre> | |
− | |||
− | cdo -t ecmwf -f nc copy ICMSHepc8+000000 ICMSHepc8+000000.nc | ||
− | |||
Revision as of 09:43, 2 December 2014
OpenIFS provides academic and research institutions with an easy-to-use version of the ECMWF IFS (Integrated Forecasting System). OpenIFS provides the forecast capability of IFS (no data assimilation), supporting software and documentation. OpenIFS has a support team at ECMWF for technical assistance but limited resources for detailed scientific assistance.
About OpenIFS provides more information about the model.
How to run openIFS:
First check openifs availability on your platform. Currently openIFS is available on UIO HPC (abel.uio.no) only.
module avail openifs -------------------------------------------------------------------------------- /cluster/etc/modulefiles --------------------------------------------------------------------------------- openifs/38r1v04(default)
If nothing is returned, it is likely openifs is not available. If you think it should, then contact us (drift@uio.no).
To load a given openifs version:
module load openifs/38r1v04
We suggest you specify the version you wish to use to avoid any problems if we install a new default version (as it is important to stick to the very same version for your simulations).
When loading openifs the following environment variables are defined:
- OIFS_CYCLE: ECMWF cycle such as 38r1 (version 38, revision 1)
- OIFS_HOME: directory where openIFS has been installed; this can be used to check openIFS sources
- OIFS_DATA: contains openIFS static input data. Even if you use your own compiled version of openIFS, it is NOT necessary to download these files again.
- OIFS_EXAMPLES: directory where all openIFS examples are stored. If you wish to run one of these examples see our dedicated section on running tutorials.
- OIFS_COMP: compilers used to create openIFS executables. We currently use intel compilers.
- OIFS_BUILD: type of build. It triggers a set of compiler options when building openIFS. Currently set to "opt"
- OIFS_GRIB_API_DIR: GRIB-API version used by openIFS to encode/decode GRIB files
- MARS_LSM_PATH: land sea mask used
- EMOS_VERSION: EMOS version (compiled with GRIB-API support). EMOS is used for interpolation routines.
- EMOS_HOME: directory where EMOS has been installed.
- BUFR_TABLES: bufrtables used for decoding/encoding BUFR (not used in the forecast model)
- CREX_TABLES: crex tables used for encoding/decoding CREX data.
For building openIFS, we use interl compilers:
module list Currently Loaded Modulefiles: 1) use.own 3) openmpi.intel/1.6.1 5) hdf5/1.8.9_intel 7) grib_api/1.12.3 9) udunits/2.2.16 11) intelmpi.intel/4.1.3 2) intel/2011.10 4) python2/2.7.3 6) netcdf.intel/4.2.1.1 8) perlmodules/5.10_2 10) intel/2013.sp1.1 12) openifs/38r1v04
Contents
Running openIFS:
openIFS examples:
There are 3 examples currently available:
cd $OIFS_EXAMPLES ls ei osloctm t21test
T21 simple test:
Choose a directory of your choice and copy this simple test:
mkdir -p $HOME/openifs/examples cd $HOME/openifs/examples cp -R $OIFS_EXAMPLES/t21test . cd t21test ls fort.4 ICMGGepc8 ICMGGepc8INIT ICMGGepc8INIUA ICMSHepc8 ICMSHepc8INIT ifsdata job namelists README ref_021_0144 ./job_uio
This is a very short and simple example and it can be run interactively (./job_uio).
All the input fields are already available and by executing job_uio, you run ECMWF openIFS forecast model.
Output fields generated by openIFS are:
ICMSHepc8+000000 ICMGGepc8+000000
SH means Spherical harmonics and GG Gaussian grid. These files are in GRIB-2 format.
You may convert these GRIB files to netCDF using cdo; for instance on sverdrup:
module load cdo/1.6.5.1 cdo -t ecmwf -f nc copy ICMSHepc8+000000 ICMSHepc8+000000.nc
For more information, see ECMWF How to convert OpenIFS outputs to netCDF.