TY - THES A1 - Reichmann, Andreas T1 - Entwicklung und Anwendung eines REA-Systems zur Messung von VOC-Flüssen aus der bzw. in die Vegetation KW - Emission KW - Biogene Kohlenwasserstoffe KW - Aerosolbildung Y1 - 2000 PB - BTU, Fak. Umweltwiss. und Verfahrenstechnik CY - Cottbus ER - TY - THES A1 - Reuder, Joachim T1 - Untersuchungen zur Variabilität von Photolysefrequenzen N2 - Quantitative Beschreibung des Einflusses der Atmosphärenparameter Sonnenstand, Gesamtozon, Aerosolgehalt und Wolken. Grundlagen der Photolysebestimmungen und Resultate aus Messungen der Photolysefrequenzen und deren Interpretation. KW - solare Strahlung KW - Photolyse KW - Atmosphäre Y1 - 1999 PB - BTU, Fakultät Umweltwiss. und Verfahrenstechnik CY - Cottbus ER - TY - THES A1 - Block, Alexander T1 - Unsicherheiten in Oberflächen- und Bodenparametern und ihre Auswirkungen auf die Ergebnisse regionaler Klimasimulationen KW - Klima KW - Model KW - Boden KW - Energiebilanz Y1 - 2007 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:co1-opus-3636 ER - 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 - Prein, Andreas A1 - Gobiet, Andreas A1 - Suklitsch, Martin A1 - Truhetz, Heimo A1 - Awan, N. K. A1 - Keuler, Klaus A1 - Georgievski, Goran T1 - Added value of convection permitting seasonal simulations T2 - Climate Dynamics Y1 - 2013 U6 - https://doi.org/10.1007/s00382-013-1744-6 VL - 41 SP - 2655 EP - 2677 ER - TY - GEN A1 - Kotlarski, Sven A1 - Keuler, Klaus A1 - Bøssing Christensen, Ole A1 - Colette, Augustin A1 - Déqué, Michel T1 - Regional climate modeling on European scales: A joint standard evaluation of the EURO-CORDEX RCM ensemble T2 - Geoscientific Model Development Y1 - 2014 U6 - https://doi.org/10.5194/gmd-7-1297-2014 N1 - 11 weitere Autoren IS - 7 SP - 1297 EP - 1333 ER - TY - GEN A1 - Panitz, Hans-Jürgen A1 - Dosio, Alessandro A1 - Büchner, Mathias A1 - Lüthi, Daniel A1 - Keuler, Klaus T1 - COSMO-CLM (CCLM) climate simulations over CORDEX Africa domain: Analysis of the ERA-Interim driven simulations at 0.44◦ and 0.22◦ resolution T2 - Climate Dynamics Y1 - 2014 U6 - https://doi.org/10.1007/s00382-013-1834-5 SN - 1432-0894 SN - 0930-7575 VL - 42 IS - 11-12 SP - 3015 EP - 3038 ER - TY - GEN A1 - Böhm, Uwe A1 - Keuler, Klaus A1 - Österle, Hermann A1 - Kücken, Martin A1 - Hauffe, Detlef T1 - Quality of a climate reconstruction for the CADSES regions T2 - Meteorologische Zeitschrift N2 - We used the regional climate model CCLM 4 to reconstruct the climate over the CADSES regions for the period 1961-2000. This most recent model version is currently still in a test phase. The simulation quality for this part of the entire simulation area is exemplarily analyzed by using a small but representative subset of model variables. Mean sea level pressure is chosen as an indicator for the behavior of the near-surface dynamics. Furthermore, the two regional variables 2 m temperature and precipitation are evaluated, which are of relevance for hydrological applications. For additional analyses to identify sources of uncertainty, we used soil moisture and cloudiness. Altogether, the accuracy of the simulation results can be judged as being in good agreement with the results of similar simulations by other regional climate models over Europe. Area-averaged monthly mean 2 m temperatures during winter show a cold bias of about -2 K. The simulated mean sea level pressure is with a bias of about 2 hPa slightly too high compared to the used reference data set. Although cloud cover evaluation hints at insufficiencies in the corresponding parameterization, further analyses are required to unambiguously identify the causes for this cold bias. During summer, higher 2 m temperatures linked to reduced precipitation are identified in nearly identical regions over southern and southeastern Europe. Further analyses of soil moisture evolution and cloud cover give evidence for a source of uncertainty in the surface hydrological scheme. Altogether, the detected differences do not exceed the typical ranges of uncertainty in comparable regional climate simulations over Europe. For input in hydrological applications, however, the uncertainties produced by the CCLM simulation described here have to be reduced in the medium term. N2 - Das Klima über den CADSES-Regionen wurde mit dem regionalen Klimamodell CCLM, Version 4.0 für den Zeitraum 1961-2000 rekonstruiert. Diese aktuellste Modellversion befindet sich gegenwärtig noch in einer Testphase. Die Qualität der Simulation für diesen Teil des Simulationsgebietes wird beispielhaft anhand einer kleinen, aber repräsentativen Teilmenge von Modellvariablen analysiert. Der Druck auf Meeresniveau wurde ausgewählt als Indikator für das Verhalten der bodennahen Dynamik. Weiterhin wurden die beiden Variablen 2 m Temperatur und Niederschlag als wichtige regionale Variablen für hydrologische Anwendungen bewertet. Für zusätzliche Analysen zur Identifizierung von Ungenauigkeitsquellen verwendeten wir die Bodenfeuchte und die Bewölkung. Insgesamt kann die Genauigkeit dieser Simulationsresultate als gut im Vergleich zu Ergebnissen von Simulationsläufen anderer regionaler Klimamodelle für Europa beurteilt werden. Gebietsmittel der monatlichen 2 m Temperaturen im Winter zeigen einen systematischen Fehler von etwa -2 K. Der simulierte Druck auf Meeresniveau ist mit einem systematischen Fehler von etwa 2 hPa etwas zu hoch im Vergleich zum verwendeten Referenzdatensatz. Obwohl die Evaluierung der Wolkendecke auf Unzulänglichkeiten in der entsprechenden Parametrisierung hinweist, sind weitere Analysen nötig, um die Ursachen für das systematisch zu kalte Modellverhalten eindeutig zu identifizieren. Im Sommer treten über nahezu identischen Regionen in Süd- und Südosteuropa höhere 2 m Temperaturen sowie geringere Niederschlägen auf. Weitere Analysen der zeitlichen Entwicklung der Bodenfeuchte und der Wolkenbedeckung geben Anhaltspunkte für eine Quelle von Ungenauigkeit im hydrologischen Teil des Bodenmodells. Insgesamt überschreiten die nachgewiesenen Unterschiede nicht die typischen Fehlerbereiche in vergleichbaren Klimasimulationen über Europa. Als Antrieb für hydrologische Anwendungen ist es allerdings mittelfristig erforderlich, die Ungenauigkeiten der hier beschriebenen CCLM-Simulation zu verringern. Y1 - 2008 U6 - https://doi.org/10.1127/0941-2948/2008/0318 SN - 1610-1227 VL - 17 IS - 4 SP - 477 EP - 485 ER - TY - GEN A1 - Feldmann, Hendrik A1 - Früh, Barbara A1 - Schädler, Gerd A1 - Panitz, Hans-Jürgen A1 - Keuler, Klaus A1 - Jacob, Daniela A1 - Lorenz, Peter T1 - Evaluation of the precipitation for south-western Germany from high resolution simulations with regional climate models T2 - Meteorologische Zeitschrift Y1 - 2008 U6 - https://doi.org/10.1127/0941-2948/2008/0295 SN - 1610-1227 VL - 17 IS - 4 SP - 455 EP - 465 ER - TY - GEN A1 - Walter, Andreas A1 - Keuler, Klaus A1 - Block, Alexander A1 - Knoche, Richard A1 - Block, Alexander A1 - Kotlarski, Sven A1 - Müller-Westermeier, Gerhard A1 - Rechid, Diana A1 - Ahrens, Wilfried T1 - A high resolution reference data set of german wind velocity 1951-2001 and comparison with regional climate model results T2 - Meteorologische Zeitschrift Y1 - 2006 U6 - https://doi.org/10.1127/0941-2948/2006/0162 SN - 1610-1227 VL - 15 IS - 6 SP - 585 EP - 596 ER - TY - GEN A1 - Kotlarski, Sven A1 - Block, Alexander A1 - Böhm, Ursula A1 - Jacob, Daniela A1 - Keuler, Klaus A1 - Knoche, Richard A1 - Rechid, Diana A1 - Walter, Artur T1 - Regional Climate Model Simulations as Input for Hydrological Applications: Evaluation of Uncertainties T2 - Advances in Geoscience Y1 - 2005 U6 - https://doi.org/10.5194/adgeo-5-119-2005 IS - 5 SP - 119 EP - 125 ER - TY - GEN A1 - Vautard, Robert A1 - Gobiet, Andreas A1 - Keuler, Klaus T1 - The simulation of European heat waves from an ensemble of regional climate models within the EURO-CORDEX project T2 - Climate Dynamics Y1 - 2013 U6 - https://doi.org/10.1007/s00382-013-1714-z SN - 1432-0894 SN - 0930-7575 N1 - weitere Autoren VL - 41 IS - 9-10 SP - 2555 EP - 2575 ER - TY - GEN A1 - Früh, Barbara A1 - Feldmann, Hendrik A1 - Panitz, Hans-Jürgen A1 - Schädler, Gerd A1 - Jacob, Daniela A1 - Lorenz, Peter A1 - Keuler, Klaus T1 - Determination of precipitation return values in complex terrain and their evaluation T2 - Journal of Climate Y1 - 2010 U6 - https://doi.org/10.1175/2009JCLI2685.1 SN - 1520-0442 VL - 23 IS - 9 SP - 2257 EP - 2274 ER - TY - CHAP A1 - Schaller, Eberhard ED - Hüttl, Reinhard F. ED - Emmermann, Rolf ED - Germer, Sonja ED - Naumann, Matthias ED - Bens, Oliver T1 - Simulation des gegenwärtigen und zukünftigen Regionalklimas von Brandenburg T2 - Globaler Wandel und regionale Entwicklung Y1 - 2011 U6 - https://doi.org/10.1007/978-3-642-19478-8 SP - 37 EP - 142 PB - Springer CY - Berlin [u.a.] ER - TY - CHAP A1 - Becker, Andreas A1 - Scherer, Bernhard A1 - Memmesheimer, Michael A1 - Geiß, Heiner ED - Seiler, Wolfgang ED - Becker, Karl-Heinz ED - Schaller, Eberhard T1 - Studying the City Plume of Berlin on 20 July 1998 with Three Different Modelling Approaches T2 - Tropospheric Chemistry Y1 - 2002 SN - 1-4020-0694-2 SP - 41 EP - 70 PB - Kluwer Academic Publishers CY - Dordrecht [u.a.] ER - TY - CHAP A1 - An, Ni A1 - Schaller, Eberhard ED - Schmitz-Hoffmann, Carsten ED - Schmidt, Michael ED - Hansmann, Berthold ED - Palekhov, Dmitry T1 - Issues and Opportunities for Implementation of VSS in China T2 - Voluntary Standard Systems Y1 - 2014 SN - 978-3-642-35715-2 SN - 978-3-642-35716-9 U6 - https://doi.org/10.1007/978-3-642-35716-9 SP - 243 EP - 251 PB - Springer CY - Berlin [u.a.] 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 - Mohr, Susanna A1 - Kunz, Michael A1 - Keuler, Klaus T1 - Development and application of a logistic model to estimate the past and future hail potential in Germany T2 - Journal of Geophysical Research: Atmospheres N2 - This study investigates to what extent the frequency of hail events in the summer months has changed during the past decades and which changes are expected to occur in the future. To improve the diagnostics of hail events by considering various factors relevant for the formation of hail, a logistic hail model has been developed by means of a multivariate analysis method. This statistical model is based on a combination of appropriate meteorological parameters (convective parameter, moisture content, etc.) and synoptic weather types. The output of the model is a new index that estimates the potential of the atmosphere for hailstorm development, referred to as potential hail index. Validations with independent data sets confirm the reliability of the model results. For Germany, the logistic hail model applied to reanalysis data over the past decades shows a markedly north‐to‐south gradient with most of the potential hail days occurring in the south. Applied to an ensemble of seven regional climate model simulations, it is found that the potential for hail events will increase in the future (2021–2050) compared to the past (1971–2000), but only statistically significant in the northwest and south of Germany. Y1 - 2015 U6 - https://doi.org/10.1002/2014JD022959 SN - 2169-8996 VL - 120 IS - 9 SP - 3939 EP - 3956 ER -