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- Try to get a namelist as starting point:
- Check if somebody has already performed a simulation on this domain or a similar domain. If this is the case try to get namelist from the namelist tool or the person directly and use this namelist as starting point.
- If there is no simulation for your target domain, or if you cannot get a namelist, check if a simulation for a domain in a similar climate zone (mid-latitudes, tropics, maritime, continental, flat, mountainous) has been done and use this namelist as starting point.
- Take the recommended COSMO-CLM version and incorporate the domain specific changes from the namelist of step 1.
- Perform an ERA-Interim simulation (ideally for 30 years but at least for 10 years) and analyze if the results are reasonable.
- Test as many different setups as possible to find the best possible setup for your domain. Include tests with similar setup but different time steps to avoid wrong results as consequence of the time step problem. For this step, the method proposed by Bellprat et at. can be used (Bellprat. O, S. Kotlarski, D. Lüthi, C. Schär (2012): Objective calibration of regional climate models. Journal of Geophysical Research, 117, D23115, DOI: 10.1029/2012JD018262. https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2012JD018262).
- Choose the best setup for your domain according to your tests.
- Send your namelist to Andreas Will (andreas.will@b-tu.de) for inclusion in the namelist tool.
- Write a short report on your tests and the outcome and send it to the coordinator of the working group EVAL.
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| Note |
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Please be aware that currently a severe time step dependence of COSMO-CLM simulation results exists. This issue is still unresolved. |
WG SUPTECH strongly recommends to use ONLY the recommended COSMO-CLM configuration for simulations in the EURO-CORDEX domain (available at http://www.clm-community.eu/namelist-tool/namelist-tool_portal/namelists/cosmo_all/CCLM-EU165_5.0_clm6.txt).
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