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License

OpenIFS is provided free-of-charge and licenses are usually per institution.

Only licensed users are provided with the username and password to access the ftp site. For more information, or to request a license, please email: openifs-support@ecmwf.int.

OpenIFS directory layout

The model will unpack into a directory called 'oifs'. The directory structure for the OpenIFS model and code will depend on local installation requirements. A suggested directory structure has all source code and data organised under a single directory 'oifs'.  If desired, the grib_api could also be installed under the oifs directory but it's recommended it is placed elsewhere.


 
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OpenIFS ftp site

All the files related to the OpenIFS models are available from the ftp site: ftp.ecmwf.int. If you do not have ftp site password, please email : openifs-support@ecmwf.int. Only licensed institutes are provided with access.

The OpenIFS models are distributed as compressed tarfiles and include source code, datafiles and supporting software. Once logged into the ftp site you will see the following directories:

Contents of ftp.ecmwf.intDescription
data/OpenIFS data files; climate files, vtables, rtables and namelist.
src/openifsOpenIFS source code tar files.
src/scmSingle Column model code and files.
src/osm-htesselOffline Surface Model (HTESSEL) code and files.
metviewMetview macros for use with OpenIFS.
user_workshopsFiles used in OpenIFS user workshops.
users/

User group specific space. Model runs initial files provided for groups users will be found here.



Contents of directory src/openifs:Description
38r1/Contains OpenIFS versions based on Cycle 38 Release 1 of IFS.
40r1/Contains OpenIFS versions based on Cycle 40 Release 1 of IFS

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To obtain the source code from the ftp site, change directory to the '38r140r1' directory and retrieve the latest source code (the filename may be different):

Code Block
% ftp ftp.ecmwf.int
user: openifs
cd src/openifs/38r140r1
ls
get oifs38r1v04.tar.gz
get oifs38r1v04_docsoifs40r1v2.tar.gz
quit

% tar zxf oifs38r1v04.tar.gz
% tar zxf oifs38r1v04_docsoifs40r1v2.tar.gz

...


OpenIFS git repository
A git repository for OpenIFS is hosted by ECMWF. This is intended for developers and contributors to the OpenIFS model and is not generally accessible.
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The data directory contains the following gzipped tarfiles, all of which should be downloaded.
Contents of directory data:Description
40r1/Contains OpenIFS versions based on Cycle 40 Release 1 of IFS.
38r1/Contains OpenIFS versions based on Cycle 38 Release 1 of IFS

 Info
These files are the same for all OpenIFS experiments. To save space for multiple users, it's recommended they are placed somewhere central and not copied to each user run directory. The sample job scripts provided assume that links are created from these files to the user run directory.
We suggest creating a directory ifsdata somewhere and unpacking the files there.

FilenameSizeDescription
<version>/ifsdata_climatology_<version>.tar.gztgz15MbContains the various long-lived gases and aerosol climatologies used by the model. Unpacks into a directory called climate.
<version>/ifsdata_cy38<version>_climate.tar.gz2.5Gb
Contains ozone climatology for all supported horizontal and vertical resolutions, including full and reduced Gaussian grid versions. Unpacks 
For example, unpacks into two directories, 38 40 and 38r140r1. The files in 38r1 40r1 link to the files in 38 40 but allow for model version specific changes.
n.b. On some systems, this file is too big for gzip to uncompress. In which case download the specific resolutions you need.
<version>/ifsdata_cy38<version>_climate_t*.tar.gzvariesThese files do not need to be downloaded if you download the above ifsdata_cy38<version>_climate.tar.gz. These contain the same data but split one file per horizontal resolution.
If you want to save space, you can download just the resolutions you intend working with.
ifsdata_rtables.tar.gz<1MbContains namelists defining the supported grid resolutions for the radiation scheme. File name suffix refers to the type of grid and last 3 digits refers to the horizontal resolution. Unpacks to a directory: rtables.
ifsdata_vtables.tar.gz<1MbContains namelists defining the coefficients for the supported vertical resolutions. File name suffix refers to the number of levels. Unpacks to a directory: vtables.
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 Code Block
% mkdir oifs/ifsdata
% cd oifs/ifsdata

% ftp ftp.ecmwf.int
Connected to ftp.ecmwf.int.
Name (ftp.ecmwf.int): openifs
331 User openifs OK. Password required
ftp> cd data
ftp> get ifsdata_rtables.tgz
ftp> get ifsdata_vtables.tgz
ftp> cd 40r1
ftp> prompt
Interactive mode off.
ftp> mget ifsdata_*
ftp> quit

% tar zxf ifsdata_climatology_40r1.tar.gztgz
% tar zxf ifsdata_cy38cy40r1_climate_*.tar.gztgz
% tar zxf ifsdata_rtables.tar.gztgz
% tar zxf ifsdata_vtables.tar.gztgz
% rm *.tar.gz
 
% ls
3840  38r140r1  climatology  namelist  rtables  vtables

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OpenIFS users may also find the Metview and MAGICS graphics software useful with OpenIFS.
 

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