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.
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;
- 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 <b><a href="https://software.ecmwf.int/wiki/display/OIFS/How-to+articles" target="_blank">OpenIFS how-to articles</a></b>: <a href="https://software.ecmwf.int/wiki/display/OIFS/How+to+control+OpenIFS+output" target="_blank">How to control OpenIFS output</a>.</p> <p>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 <a href="https://software.ecmwf.int/wiki/display/OIFS/5.4+Download+OpenIFS" target="_blank">OpenIFS distribution</a> and the model execution is explained in detail at the <strong><a href="https://software.ecmwf.int/wiki/display/OIFS/5.+OpenIFS+Installation" target="_blank">OpenIFS installation page</a></strong>: <a href="https://software.ecmwf.int/wiki/display/OIFS/5.6+Acceptance+testing+OpenIFS+after+installation" target="_blank">Acceptance testing OpenIFS after installation</a>.</p>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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