The DYAMOND Model intercomparison(s)

The initiative DYAMOND (DYnamics of the Atmospheric general circulation Modeled On Non-hydrostatic Domains) sets up a framework for the intercomparison of global storm-resolving models, i.e. an emerging class of atmospheric circulation models.

DYAMOND addresses three main questions:

  1. Where do the storm-resolving simulations agree and provide deeper insights into the climate system?

  2. How sensitive are the simulations to a particular implementation?

  3. What are performance and analysis bottle necks associated with global storm-resolving models?

The intercomparison has resulted in several publications. If you use DYAMOND intercomparison data in your research, we request you follow the guidelines for acknowledging DYAMOND data. Find more details at the ESiWACE DYAMOND page.

The DYAMOND intercomparison is coordinated by the Max Planck Institute for Meteorology (MPI-M) and the German Climate Computing Center (DKRZ) and supported by the Centre of Excellence in Simulation of Weather and Climate in Europe (ESiWACE). In case of questions, please contact the DYAMOND coordination team via: dyamond@esiwace.eu.

Phases

So far, the following models participated in at least on of the two DYAMOND pahses: ARPEGE NH, GEOS, ICON, IFS, NICAM, SAM, SCREAM, SHiELD, Unified Model (UM). More information about the models and their providede experiment runs can be found in dedicated DYAMOND phase pages.

Getting DYAMOND data

Since the DYAMOND data sets contain hundreds of terabytes of data, most of the data is archived in DKRZ’s HSM tape archive. For a smooth and convenient provision of data sets, a data library, called ”Dyamond data library”, serves as a central point for data access. It is situated at the DKRZ’s Mistral supercomputer and can be found at /work/bk1040/DYAMOND/.

1) Get/check your user account at DKRZ:

To access the DYAMOND data library you will need a user account for the project “1153”, named “DYAMOND Data Intercomparison” at DKRZ. To do so, please visit https://luv.dkrz.de. For more information about how to start at DKRZ see: https://docs.dkrz.de/doc/getting_started/index.html.

After you get a confirming e-mail you are able to login to mistral ( e.g. ssh <user-account>@mistral.dkrz.de). The DYAMOND project can be found under /work/bb1153/.

2) Use the DYAMOND data library:

The archived data sets can be searched within the library and and requests for required data tarballs can be made. These files will then be downloaded for you to the folder data/summer_data/<model> by the DYAMOND coordination team and will be accessible to all DYAMOND users. There, also already requested files can be found. A detailed description how to use the DYAMOND data library is given in the README file /work/bk1040/DYAMOND/README.

The data sets will be read-only, so you will have to define the respective subfolder as the source directory for your post-processing scripts in your home/ or scratch/ folder. Since the quota of your home directory is limited to 24 GiB, we recommend to store project data under /work/bb1153/<user-account>/ and use the temporary storage in your scratch folder /scratch/*/<user-account>/ for processing of large data sets.

In order not to blow up the amount of the disk space used in this project, unused data sets will be deleted from the project folder on a regular basis. You may also want to check The DYAMOND Data Library for further information.

For any questions, please contact the ESiWACE coordination team.

Important

If you work with the data stored at DKRZ, we request that you acknowledge DKRZ and ESiWACE in any publication resulting from this work.

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