Downloading the input data
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<p>The <strong>input data and</strong> the <strong>namelists</strong> needed to run the experiments <strong>can be downloaded</strong> from the ECMWF server (login is not required). For further instructions, please visit the following website: <strong><a href="http://download.ecmwf.int/test-data/openifs/reference_casestudies" target="_blank">http://download.ecmwf.int/test-data/openifs/reference_casestudies</a></strong>.</p>
<p>The files are packed in <span class="font_code_black">.tar.gz</span> files and structured into directories named after the case studies (i.e. <span class="font_code_black">Xaver_201312</span>, <span class="font_code_black">Desmond_201512</span>) and subdirectories indicating the main experiment characteristics (e.g., <span class="font_code_black">T255L91_ERA5</span>). Each archive file contains the data for a given starting date (e.g., <span class="font_code_black">gs0c_2015120300.tar.gz</span>). Typical content of a <span class="font_code_black">.tar.gz</span> file is as follows:</p>
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* NODE.001_01.model.1
and ifs.stat.model.1
files are from an OpenIFS run at ECMWF and they are provided for comparison with the user run.
Downloading the input data
!! The input data and the namelists needed to run the experiments can be downloaded from the ECMWF FTP server. For further instructions, please visit the following website: download.ecmwf.int/test-data/openifs. !!
The files are packed in .tar.gz files and structured into directories named after the case studies (i.e., Xaver_201312, Desmond_201512) and subdirectories indicating the main experiment characteristics (e.g., T255L91_ERA5). Each archive file contains the data for a given starting date (e.g., gs0c_2015120300.tar.gz). Typical content of a .tar.gz file is as follows:
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title | Sample directory list of an archive file |
File name
Description Size
: directory for a given starting date
0 MB2015120300/ecmwf/ : subdirectory containing the namelists and some outputs
0 MB2015120300/ecmwf/namelistfc : namelist with detailed experiment setup
4.6 KB 2015120300/ecmwf/NODE.001_01.model.1 : text output (log) file including all the important information about the model run 3.8 MB
2015120300/ecmwf/ifs.stat.model.1 : information about model steps (useful for debugging)
26 KB 2015120300/ecmwf/wam_namelist : namelist of the coupled wave model
3.1 KB 2015120300/ICMCLgs0cINIT : input file containing surface and soil information (albedo, soil temperature etc.) 9.3 MB
2015120300/ICMGGgs0cINIT : input file containing gridpoint surface initial data
7 MB 2015120300/ICMSHgs0cINIT : input file containing initial data for the prognostic variables in spectral representation 35 MB
2015120300/ICMGGgs0cINIUA : input file containing initial data for the prognostic variables in gridpoint representation 101 MB
2015120300/wam_grid_tables : model grid and tables for the wave model
52 MB 2015120300/wam_subgrid_0 : information for model advection, including sub-grid parametrisation for the wave model
12 MB
2015120300/wam_subgrid_1 : information for model advection, including sub-grid parametrisation for the wave model
25 MB
2015120300/wam_subgrid_2 : information for model advection, including sub-grid parametrisation for the wave model 25 MB
2015120300/cdwavein : initial value of drag coefficient for the wave model
63 KB
2015120300/specwavein : initial wave spectra for the wave model
7.6 MB 2015120300/uwavein : initial value of wind speed for the wave model
63 KB
2015120300/sfcwindin : initial value of 10-meter horizontal wind components and sea ice fraction for the wave model 2.2 MB
The namelist
The namelist file highlighted in green in the box above controls the necessary experiment settings (e.g., time step, experiment ID) as well as the post-processing. The most important namelist elements are listed below with their explanation:
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In the evaluation, we would like to investigate the following variables:
- mean sea level pressure: its code number is 151;
- 2-meter temperature: its GRIB code number is 167;
- precipitation: it is composed from large-scale and convective precipitation with code numbers 142 and 143, respectively;
- mean sea level pressure: its code number is 151;
- 10-meter wind gust: its code number is 49;
- temperature at 850 hPa level: its code number is 130;
- relative humidity at 700 hPa level: its code number is 157;
- geopotential at 500 hPa level: its code number is 129;
u and v wind components at 250 and 100 hPa with code numbers 131 and 132, respectively.
These variables have to be included in the namelist among the post-processing
variables
(see
the
code
numbers
and
levels
highlighted
with
<b>bold</b>characters
in
the
box
above).
More
information
about
the
namelist
settings
and
GRIB field codes of different parameters can be found in the OpenIFS how-to articles: How to control OpenIFS. To run the model, the paths of the input data and the namelist have to be set in the job script. A sample job script is part of the OpenIFS distribution and the model execution is explained in detail at the OpenIFS installation page.
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