TY - GEN A1 - Jacob, Daniela A1 - Keuler, Klaus A1 - Georgievski, Goran A1 - Radtke, Kai T1 - EURO-CORDEX: new high-resolution climate change projections for European impact research T2 - Regional Environmental Change N2 - 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. Y1 - 2014 U6 - https://doi.org/10.1007/s10113-013-0499-2 SN - 1436-378X VL - 14 IS - 2 SP - 563 EP - 578 ER - TY - GEN A1 - Jacob, Daniela A1 - Keuler, Klaus A1 - Georgievski, Goran A1 - Radtke, Kai T1 - Erratum to: EURO-CORDEX: new high-resolution climate change projections for European impact research T2 - Regional Environmental Change Y1 - 2014 U6 - https://doi.org/10.1007/s10113-014-0587-y SN - 1436-378X N1 - weitere Autoren VL - 14 IS - 2 SP - 579 EP - 581 ER - TY - GEN A1 - Georgievski, Goran A1 - Keuler, Klaus A1 - Will, Andreas A1 - Radtke, Kai T1 - Evaluation of Central European and Eastern Alpine seasonal climate simulated with CCLM: double nesting vs. direct forcing techniques T2 - COSMO Newsletter Y1 - 2011 UR - www.cosmo-model.org/content/model/documentation/newsLetters/newsLetter11/newsLetter_11.pdf IS - 11 SP - 133 EP - 142 ER - TY - CHAP A1 - Radtke, Kai S. A1 - Keuler, Klaus ED - Rockel, Burkhardt ED - Bärring, Lars ED - Reckermann, Marcus T1 - Climate change in Europe simulated by the regional climate model COSMO-CLM T2 - 2nd International Lund RCM Workshop : 21st Century Challenges in Regional-scale Climate Modelling, Lund University, Sweden, 4-8 May 2008, workshop proceedings Y1 - 2009 SP - 56 EP - 57 PB - International BALTEX Secretariat CY - GKSS Forschungszentrum Geesthacht ER - TY - CHAP A1 - Keuler, Klaus A1 - Radtke, Kai S. A1 - Schaller, Eberhard ED - Rockel, Burkhardt ED - Bärring, Lars ED - Reckermann, Marcus T1 - Effect of internal variability on regional climate change projections T2 - 2nd International Lund RCM Workshop : 21st Century Challenges in Regional-scale Climate Modelling, Lund University, Sweden, 4-8 May 2008, workshop proceedings Y1 - 2009 SP - 132 EP - 133 PB - International BALTEX Secretariat CY - GKSS Forschungszentrum Geesthacht ER - TY - GEN A1 - Keuler, Klaus A1 - Radtke, Kai A1 - Kotlarski, Sven A1 - Lüthi, Daniel T1 - Regional climate change over Europe in COSMO-CLM: Influence of emission scenario and driving global model T2 - Meteorologische Zeitschrift N2 - The variability of climate change over Europe is analyzed in a new ensemble of eight high-resolution scenario simulations with the dynamically nested regional climate model COSMO-CLM. The simulations are a contribution of the CLM-Community to EURO-CORDEX – the European branch of the international CORDEX initiative. The study documents the influence of two emission scenarios (RCP4.5 and RCP8.5) and four driving global climate models (MPI-ESM-LR, HadGEM2-ES, CNRM-CM5, EC-EARTH) on the climate change signal of seasonal near-surface air temperature, seasonal precipitation amount and daily precipitation intensity in eight different regions of Europe. Both temperature and precipitation changes show comparable spatial patterns across the ensemble. The warming magnitude, however, strongly depends on the emission scenario and the driving GCM. The analysis demonstrates that the influence of the driving GCM on the temperature change signal can be of comparable magnitude as the influence of the emission scenario. For seasonal precipitation changes the influence of the driving GCM is even more important. All ensemble members show a consistent increase in the frequency of days with intense precipitation while the total number of precipitation days decreases. A further aspect is the comparison between the climate change signals in the regional and the driving global simulations. A critical intensity class is used to quantify the transition from decreasing to increasing precipitation frequencies. The analysis reveals that the variability of frequency changes is smaller in the regional than in the global model ensemble, which can be interpreted as an improved robustness and a possible added value of the regional projections. It is also shown that the regional simulations tend to reduce the seasonal mean temperature change of the driving global simulation. In some seasons and regions the damping of the warming signal can amount to more than 2K. Overall, the analysis reveals a strong influence of comparable magnitude of the choice of the emission scenario and the driving global model on regional climate change signals, and stresses the necessity of a large regional model ensemble for a reliable and robust assessment of regional climate change. KW - Regional climate change KW - COSMO-CLM KW - EURO-CORDEX KW - dynamical downscaling Y1 - 2016 UR - http://www.schweizerbart.de/content/papers/download/85532 U6 - https://doi.org/10.1127/metz/2016/0662 SN - 0941-2948 SN - 1610-1227 VL - 25 IS - 2 SP - 121 EP - 136 ER - TY - RPRT A1 - Hübener, Heike A1 - Bülow, Katharina A1 - Fooken, Cornelia A1 - Früh, Barbara A1 - Hoffmann, Peter A1 - Höpp, Simona A1 - Keuler, Klaus A1 - Menz, Christoph A1 - Mohr, Viktoria A1 - Radtke, Kai A1 - Woldt, Michael T1 - ReKliEs-De Ergebnisbericht Y1 - 2017 UR - reklies.hlnug.de/fileadmin/tmpl/reklies/dokumente/ReKliEs-De-Ergebnisbericht.pdf N1 - weitere Autoren PB - Eigenverlag des Hessischen Landesamtes HLNUG CY - Wiesbaden ER - TY - RPRT A1 - Hübener, Heike A1 - Spekat, Arne A1 - Bülow, Katharina A1 - Früh, Barbara A1 - Keuler, Klaus A1 - Menz, Christoph A1 - Radtke, Kai A1 - Ramthun, Hans T1 - ReKliEs-De Nutzerhandbuch Y1 - 2017 UR - http://reklies.hlnug.de/fileadmin/tmpl/reklies/dokumente/ReKliEs-De-Nutzerhandbuch.pdf U6 - https://doi.org/10.2312/WDCC/ReKliEsDe_Nutzerhandbuch N1 - weitere Autoren PB - World Data Center for Climate (WDCC) at DKRZ CY - Hamburg ER - TY - GEN A1 - Tölle, Merja H. A1 - Breil, Marcus A1 - Radtke, Kai A1 - Panitz, Hans-Jürgen T1 - Sensitivity of European temperature to albedo parameterization in the regional climate model COSMO CLM linked to extreme land use changes T2 - Frontiers in Environmental Science KW - land cover changel KW - biophysical effect KW - albedo parameterization KW - evapotranspiration KW - regional climate model KW - climate KW - de-/afforestation KW - surface energy balance Y1 - 2018 U6 - https://doi.org/10.3389/fenvs.2018.00123 SN - 2296-665X VL - 6 ER - TY - GEN A1 - Davin, Edouard A1 - Rechid, Diana A1 - Breil, Marcus A1 - Cardoso, Rita M. A1 - Coppola, Erika A1 - Hoffmann, Peter A1 - Jach, Lisa L. A1 - Katragkou, Eleni A1 - Noblet-Ducoudré, Nathalie de A1 - Radtke, Kai A1 - Raffa, Mario A1 - Soares, Pedro A1 - Sofiadis, Giannis A1 - Strada, Susanna A1 - Strandberg, Gustav A1 - Tölle, Merja H. A1 - Warrach-Sagi, Kirsten A1 - Wulfmeyer, Volker T1 - Biogeophysical impacts of deforestation in Europe First results from the LUCAS Regional Climate Mode intercomparison T2 - Earth System Dynamics N2 - The Land Use and Climate Across Scales Flagship Pilot Study (LUCAS FPS) is a coordinated community effort to improve the integration of land use change (LUC) in regional climate models (RCMs) and to quantify the biogeophysical effects of LUC on local to regional climate in Europe. In the first phase of LUCAS, nine RCMs are used to explore the biogeophysical impacts of re-/afforestation over Europe: two idealized experiments representing respectively a non-forested and a maximally forested Europe are compared in order to quantify spatial and temporal variations in the regional climate sensitivity to forestation. We find some robust features in the simulated response to forestation. In particular, all models indicate a year-round decrease in surface albedo, which is most pronounced in winter and spring at high latitudes. This results in a winter warming effect, with values ranging from +0.2 to +1 K on average over Scandinavia depending on models. However, there are also a number of strongly diverging responses. For instance, there is no agreement on the sign of temperature changes in summer with some RCMs predicting a widespread cooling from forestation (well below −2 K in most regions), a widespread warming (around +2 K or above in most regions) or a mixed response. A large part of the inter-model spread is attributed to the representation of land processes. In particular, differences in the partitioning of sensible and latent heat are identified as a key source of uncertainty in summer. Atmospheric processes, such as changes in incoming radiation due to cloud cover feedbacks, also influence the simulated response in most seasons. In conclusion, the multi-model approach we use here has the potential to deliver more robust and reliable information to stakeholders involved in land use planning, as compared to results based on single models. However, given the contradictory responses identified, our results also show that there are still fundamental uncertainties that need to be tackled to better anticipate the possible intended or unintended consequences of LUC on regional climates. Y1 - 2020 U6 - https://doi.org/10.5194/esd-11-183-2020 SN - 2190-4995 VL - 11 IS - 1 SP - 183 EP - 200 ER - TY - RPRT A1 - Hollweg, Heinz-Dieter A1 - Böhm, Uwe A1 - Fast, Irina A1 - Hennemuth, Barbara A1 - Keuler, Klaus A1 - Keup-Thiel, Elke A1 - Lautenschlager, Michael A1 - Legutke, Stephanie A1 - Radtke, Kai A1 - Rockel, Burkhardt A1 - Schubert, Martina A1 - Will, Andreas A1 - Woldt, Michael A1 - Wunram, Claudia T1 - Ensemble Simulations over Europe with the Regional Climate Model CLM forced with IPCC AR4 Global Scenarios N2 - Regional climate projections have been performed for Europe with the climate version CLM (version 3.1) of the 'Lokal-Modell' (LM) of the German Meteorological Service. CLM has been forced with output of the ECHAM5/MPIOM global climate model of the Max Planck Institute for Meteorology, which contributed to the fourth climate assessment report (AR4) of the International Panel on Climate Change (IPCC). The results of the global model for the IPCC A1B and B1 scenarios as well as the reconstruction of the last four decades of the 20th century (20C3M) for the AR4 are dynamically scaled down to the CLM grid cell size of about 18×18 km2. Climatological parameters including all model variables and additional quantities characterising the climate are available from the World Data Centre for Climate database run by the German climate service group Model and Data. They can be accessed by the general public at no costs with the help of M and D. In particular, the 'Service Group Adaptation' (SGA) has been established at M and D to assist adaptation projects funded by the German Federal Ministry of Education and Research (BMBF) giving advice on the interpretation of the CLM model results. Y1 - 2008 UR - https://cera-www.dkrz.de/WDCC/ui/cerasearch/entry?acronym=MaD_TeReport_No03 U6 - https://doi.org/10.2312/WDCC/MaD_TeReport_No03 PB - Max-Planck-Institut für Meteorologie CY - Hamburg ER - TY - GEN A1 - Gerling, Charlotte A1 - Drechsler, Martin A1 - Keuler, Klaus A1 - Leins, Johannes A. A1 - Radtke, Kai A1 - Schulz, Björn A1 - Sturm, Astrid A1 - Wätzold, Frank T1 - Modelling the cost-effective spatio-temporal allocation of conservation measures in agricultural landscapes facing N2 - Beiträge zur Jahrestagung des Vereins für Socialpolitik 2021: Climate Economics Y1 - 2021 UR - http://hdl.handle.net/10419/242352 PB - ZBW-Leibnitz Information Centre for Economics CY - Kiel ; Hamburg ER - TY - GEN A1 - Gerling, Charlotte A1 - Drechsler, Martin A1 - Keuler, Klaus A1 - Leins, Johannes A. A1 - Radtke, Kai A1 - Schulz, Björn A1 - Sturm, Astrid A1 - Wätzold, Frank T1 - Cost-effective conservation in the face of climate change: combining ecological-economic modelling and climate science for the cost-effective spatio-temporal allocation of conservation measures in agricultural landscapes T2 - MPRA paper Y1 - 2021 UR - https://mpra.ub.uni-muenchen.de/105608/ ER - TY - GEN A1 - Gerling, Charlotte A1 - Drechsler, Martin A1 - Keuler, Klaus A1 - Leins, Johannes A. A1 - Radtke, Kai A1 - Schulz, Björn A1 - Sturm, Astrid A1 - Wätzold, Frank T1 - Climate-ecological-economic modelling for the cost-effective spatiotemporal allocation of conservation measures in cultural landscapes facing climate change T2 - Q Open Y1 - 2022 U6 - https://doi.org/10.1093/qopen/qoac004 SN - 2633-9048 VL - 2 IS - 1 SP - 1 EP - 20 ER - TY - GEN A1 - Gerling, Charlotte A1 - Sturm, Astrid A1 - Wätzold, Frank A1 - Keuler, Klaus A1 - Radtke, Kai A1 - Drechsler, Martin A1 - Leins, Johannes A. T1 - Ökonomie der Klimaanpassung zum Schutz der biologischen Vielfalt ; Postervorstellung : BfN Statuskonferenz "Biodiversität und Klimawandel - Synergien erforschen" in Berlin, 7.12.2023 Y1 - 2023 U6 - https://doi.org/10.13140/RG.2.2.16540.97923 ER -