NUKLEUS - convection permitting ERA5-driven evaluation simulation data and code
Sieck, Kevin et al.
Dataset
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Summary
This dataset contains a subset of the evaluation simulations of the NUKLEUS ensemble as well as associated analysis scripts. More specifically, the dataset contains the data corresponding to the manuscript "NUKLEUS – A First Kilometre Scale Multi-model Climate Ensemble for Germany: Evaluation" (Sieck et al., 2026; available as preprint here: https://doi.org/10.5194/egusphere-2026-1024).
The ERA reanalysis data was dynamically downscaled via an intermediate step with 12km grid spacing over the EURO-CORDEX domain of Europe (EUR-11). The regional climate models applied for the downscaling are COSMO-CLM (in versions CLMcom-KIT-CCLM-6-0-clm2 and CLMcom-Hereon-CCLM-6-0-clm2), ICON-CLM (CLMcom-BTU-ICON-2-6-4-clm), and REMO (GERICS-REMO2020).
The data is provided on a rotated curvilinear grid covering central Europe (CEU-3) with an approximate grid spacing of 3 km.
Data is provided with different temporal resolution (hourly to annual) for the following variables:
- precipitation (TOT_PREC or pr)
- near-surface air temperature (T_2M or tas)
- daily minimum near-surface air temperature (TMIN_2M)
- daily maximum near-surface air temperature (TMAX_2M)
- global radiation (SOD_S, SRADSD)
- 10m windspeed (SP_10m)
- climate indices (fd, r20mm, r98ptot, su, txge30)
For the different temporal resolutions the following data is available:
- diurnal cycles: T_2M, TOT_PREC, SP_10m, SOD_S
- daily: TMAX_2M, TMIN_2M, TOT_PREC
- monthly: T_2M, TOT_PREC
- annual: fd, r20mm, r98ptot, su, txge30
The analysis scripts contained in the dataset serve to:
- calculate and plot annual cycles (in R)
- calculate (with Evasuite) and plot diurnal cycles (in R)
- calculate (shell script for ClimDexCalc2 plugin call) and plot climate indices (in Python)
- calculation and plotting of frequency distributions (in R)
- calculation and plotting of bias maps (with Evasuite)
Applied tools can be found here:
EvaSuite: https://gitlab.dkrz.de/clm-community/working-groups/clm-eval/evasuite ClimDexCalc2 plugin on Levante @ DKRZ (based on Climpact: https://climpact-sci.org/)