A5089985650- Climate variability and models
- Meteorological Phenomena and Simulations
- Arctic and Antarctic ice dynamics
- Climate change and permafrost
- Scientific Computing and Data Management
- Distributed and Parallel Computing Systems
- Atmospheric and Environmental Gas Dynamics
- Tropical and Extratropical Cyclones Research
- Cryospheric studies and observations
- Forecasting Techniques and Applications
- Peatlands and Wetlands Ecology
- Energy Load and Power Forecasting
- Plant Water Relations and Carbon Dynamics
- Climate Change and Health Impacts
- Geographic Information Systems Studies
- Hydrology and Watershed Management Studies
- Hydrological Forecasting Using AI
- Soil Moisture and Remote Sensing
- Ionosphere and magnetosphere dynamics
- Engineering Applied Research
- Climate change impacts on agriculture
- EU Law and Policy Analysis
- Geophysics and Gravity Measurements
- demographic modeling and climate adaptation
- Computational Physics and Python Applications
Freie Universität Berlin
2015-2024
Potsdam Institute for Climate Impact Research
2024
Max Planck Institute for Meteorology
2021
Abstract. The summer of 2018 was an extraordinary season in climatological terms for northern and central Europe, bringing simultaneous, widespread, concurrent heat drought extremes large parts the continent with extensive impacts on agriculture, forests, water supply, socio-economic sector. Here, we present a comprehensive, multi-faceted analysis extreme particular focus Germany. heatwave first affected Scandinavia mid-July shifted towards Europe late July, while Iberia primarily early...
The link between the indices of twelve atmospheric teleconnection patterns (mostly Northern Hemispheric) and gridded European temperature data is investigated by means multiple linear regression models for each grid cell month.Furthermore index-specific signals are calculated to estimate contribution anomalies caused individual pattern.To this extent, an observational product monthly mean (E-OBS), as well time series (CPC, NOAA) period 1951-2010 evaluated.The stepwise approach used build...
Freva – Free Evaluation System Framework for Earth system modeling is an efficient solution to handle evaluation systems of research projects, institutes or universities in the climate community. It a scientific software framework high performance computing that provides all its available features both shell and web environment. The main design equipped with programming interface, history evaluations, standardized model database. Plugin generic application interface allows developers connect...
Abstract. As the performance of weather and climate forecasting systems their benchmark are generally not homogeneous in time space may vary specific situations, improvements certain situations or subsets have different effects on overall skill. We present a decomposition skill scores for conditional verification such systems. The aim is to evaluate system individually predefined with respect performance. score decomposed into weighted sum representing subset contributions, where each...
Abstract. The summer of 2018 was an extraordinary season in climatological terms for northern and central Europe, bringing simultaneous, widespread, concurrent heat drought extremes large parts the continent with extensive impacts on agriculture, forests, water supply, socio-economic sector. We present a comprehensive, multi-faceted analysis extreme Europe particular focus Germany. heatwave first affected Scandinavia by mid-July, shifted towards late July, while Iberia primarily early...
Abstract. We present a decomposition of skill scores for the conditional verification weather and climate forecast systems. Aim is to evaluate performance such system individually predefined subsets with respect overall performance. The score decomposed into: (1) subset assessing compared reference particular subset; (2) frequency weighting accounting varying size; (3) relating in individual full data set. its interpretation exemplified using synthetic Subsequently we use it practical...
Abstract. In this study the latest version of MiKlip decadal hindcast system is analyzed, and effect an increased horizontal vertical resolution on prediction skill extratropical winter circulation assessed. Four different metrics – storm track, blocking, cyclone windstorm frequencies are analyzed in North Atlantic European region. The model bias deterministic evaluated ensembles five members a lower-resolution (LR, atm: T63L47, ocean: 1.5∘ L40) higher-resolution (HR, T127L95, 0.4∘ based Max...
Abstract. The question to what extent Arctic sea ice loss is able affect atmospheric dynamics and climate extremes over mid-latitudes still remains a highly debated topic. In this study we investigate model experiments from the Polar Amplification Model Intercomparison Project (PAMIP) compare with future prescribed entire Arctic, as well only locally Barents Kara seas, present-day reference experiment. first step perform regime analysis analyze change in occurrence frequencies of five...
Seit etwa 1990 wird das Phänomen der „Arktischen Verstärkung“ beobachtet, die 3- bis 4-fach stärkere Erwärmung Arktis im Vergleich zur globalen beschreibt. Diese Zeit fällt mit einer Periode zusammen, in Zahl extremen Wetter- und Klimaereignisse den mittleren Breiten nördlichen Hemisphäre zunahm. Zunahme kann teilweise direkt durch globale damit verbundenen thermodynamischen Effekte erklärt werden,...
Blockierende Hochdruckwetterlagen (Blockings) in Europa können das Auftreten von bodennahen Hitzeextremen im Bereich der Blockings begünstigen und spielen daher insbesondere Frühling bis Herbst eine wichtige Rolle bei Entwicklung Hitzewellen. Um den Einfluss des zukünftigen globalen Erwärmungstrends auf Änderungen Häufigkeit zu untersuchen, werden die entsprechenden Auftrittshäufigkeiten Zukunftsszenario SSP585...
Abstract. In this study the latest version of MiKlip decadal hindcast system is analyzed and effect different horizontal vertical resolutions on prediction skill northern hemisphere extra-tropical atmospheric circulation assessed. Four metrics – stormtrack, blocking frequencies, cyclone frequencies windstorm are with respect to anomaly correlation their winter averages. The model bias evaluated in both, a lower resolution (LR, atm: T63L47, ocean: 1.5° L40) higher (HR, T127L95, 0.4° MPI-ESM...
<p>The Free Evaluation System Framework (Freva - freva.met.fu-berlin.de) is a software infrastructure for standardized data and tool solutions in Earth system science. Freva runs on high performance computers to handle customizable evaluation systems of research projects, institutes or universities. It combines different technologies into one common hybrid infrastructure, including all features present the shell web environment. The database interface satisfies international...
Abstract. The question to what extent Arctic sea ice loss is able affect atmospheric dynamics and climate extremes over mid-latitudes still remains a highly debated topic. In this study we assess the impact of future retreat on occurrence probabilities wintertime circulation regimes link these dynamical changes frequency in European winter temperature extremes. For reason, analyze ECHAM6 sensitivity model simulations from Polar Amplification Intercomparison Project compare experiments with...
<p>This study analyzes the representation of extratropical circulation over North Atlantic (NA) region using German decadal prediction system (MiKlip) two different spatial resolutions. Four quantities are assessed, i.e. storm track, blocking frequencies, cyclone and windstorm frequencies. We investigate effect model initialization for in a lower resolution (LR, atm: T63L47, ocean: 1.5° L40) higher version (HR, T127L95, 0.4°...
<p>As the scientific and societal interest in skillful decadal predictions grows, a lot of effort is currently put into development advancement such prediction systems worldwide. Studies evaluating skill basic atmospheric quantities, as e.g. surface temperatures, those are numerous. However, dynamical quantities discussed only rarely. Also, there lack investigations which assess exclusive impact model’s resolution on forecast...