The Regional Climate Model COSMO-CLM (CCLM)

Rockel, Burkhard; Will, Andreas; Hense, Andreas

doi:10.1127/0941-2948/2008/0309

Cited by 944 publications

(601 citation statements)

References 2 publications

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“…For changes in all outcome measures (mean annual and seasonal temperature, total annual and seasonal precipitation, heavy precipitation, heat waves and dry spells), significance and robustness were tested using a method adapted from Pfeifer et al (2013). This method identifies regions with relatively strong and robust climate changes from an ensemble of climate change simulations.…”

Section: Methodsmentioning

confidence: 99%

EURO-CORDEX: new high-resolution climate change projections for European impact research

et al. 2013

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A new high-resolution regional climate change ensemble has been established for Europe within the World Climate Research Program Coordinated Regional Downscaling Experiment (EURO-CORDEX) initiative. The first set of simulations with a horizontal resolution of 12.5 km was completed for the new emission scenarios RCP4.5 and RCP8.5 with more simulations expected to follow. The aim of this paper is to present this data set to the different communities active in regional climate modelling, impact assessment and adaptation. The EURO-CORDEX ensemble results have been compared to the SRES A1B simulation results achieved within the ENSEMBLES project. The large-scale patterns of changes in mean temperature and precipitation are similar in all three scenarios, but they differ in regional details, which can partly be related to the higher resolution in EURO-CORDEX. The results strengthen those obtained in ENSEMBLES, but need further investigations. The analysis of impact indices shows that for RCP8.5, there is a substantially larger change projected for temperature-based indices than for RCP4.5. The difference is less pronounced for precipitation-based indices. Two effects of the increased resolution can be regarded as an added value of regional climate simulations. Regional climate model simulations provide higher daily precipitation intensities, which are completely missing in the global climate model simulations, and they provide a significantly different climate change of daily precipitation intensities resulting in a smoother shift from weak to moderate and high intensities.

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Section: Methodsmentioning

confidence: 99%

EURO-CORDEX: new high-resolution climate change projections for European impact research

et al. 2013

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“…Simulations with the COSMO-CLM (CCLM) model (see Rockel et al 2008) were performed at two institutions: CMCC and Goethe University, Frankfurt (GUF). Simulations driven by ERA-Interim and MPI-ESM-LR were performed at GUF with CCLM4-8-18.…”

Section: Regional Climate Models (Rcms)mentioning

confidence: 99%

Mistral and Tramontane wind systems in climate simulations from 1950 to 2100

et al. 2017

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“…Although high-resolution models improve the accuracy of spatio-temporal precipitation characteristics, all ENSEMBLES RCMs exhibit a wet bias of about 20% in winter and about 10% in summer (Rauscher et al 2010). In the downscaling experiments with COSMO-CLM (CCLM, COnsortium for Small-scale MOdelingClimate Limited-area Model; Rockel et al 2008), named consortional runs, resolution increased further down to 18 km (Hollweg et al 2008). The recent Coordinated Regional Downscaling Experiment (CORDEX; Giorgi et al 2009) addresses the improvements and climate change signals in the RCM climate simulations.…”

Section: Introductionmentioning

confidence: 99%

Scale dependency of regional climate modeling of current and future climate extremes in Germany

Tölle

Schefczyk

Gutjahr

2017

Theor Appl Climatol

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A warmer climate is projected for mid-Europe, with less precipitation in summer, but with intensified extremes of precipitation and near-surface temperature. However, the extent and magnitude of such changes are associated with creditable uncertainty because of the limitations of model resolution and parameterizations. Here, we present the results of convection-permitting regional climate model simulations for Germany integrated with the COSMO-CLM using a horizontal grid spacing of 1.3 km, and additional 4.5-and 7-km simulations with convection parameterized. Of particular interest is how the temperature and precipitation fields and their extremes depend on the horizontal resolution for current and future climate conditions. The spatial variability of precipitation increases with resolution because of more realistic orography and physical parameterizations, but values are overestimated in summer and over mountain ridges in all simulations compared to observations. The spatial variability of temperature is improved at a resolution of 1.3 km, but the results are cold-biased, especially in summer. The increase in resolution from 7/4.5 km to 1.3 km is accompanied by less future warming in summer by 1 Max Planck Institute for Meteorology, Hamburg, Germany precipitation extremes will be more severe, and temperature extremes will not exclusively increase with higher resolution. Although the differences between the resolutions considered (7/4.5 km and 1.3 km) are small, we find that the differences in the changes in extremes are large. High-resolution simulations require further studies, with effective parameterizations and tunings for different topographic regions. Impact models and assessment studies may benefit from such high-resolution model results, but should account for the impact of model resolution on model processes and climate change.

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The Regional Climate Model COSMO-CLM (CCLM)

Cited by 944 publications

References 2 publications

EURO-CORDEX: new high-resolution climate change projections for European impact research

EURO-CORDEX: new high-resolution climate change projections for European impact research

Mistral and Tramontane wind systems in climate simulations from 1950 to 2100

Scale dependency of regional climate modeling of current and future climate extremes in Germany

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