A5027167032- Climate variability and models
- Meteorological Phenomena and Simulations
- Tropical and Extratropical Cyclones Research
- Cryospheric studies and observations
- Scientific Computing and Data Management
- Distributed and Parallel Computing Systems
- Geophysics and Gravity Measurements
- Atmospheric and Environmental Gas Dynamics
- Oceanographic and Atmospheric Processes
- Wind and Air Flow Studies
- Arctic and Antarctic ice dynamics
- Flood Risk Assessment and Management
- Atmospheric Ozone and Climate
- Aeolian processes and effects
- Methane Hydrates and Related Phenomena
- Tree Root and Stability Studies
- Ionosphere and magnetosphere dynamics
- Hydrology and Drought Analysis
- Seismology and Earthquake Studies
- Fire effects on ecosystems
- Radiomics and Machine Learning in Medical Imaging
- Polar Research and Ecology
- Climate Change and Geoengineering
- Climate Change and Environmental Impact
- Geological Studies and Exploration
Freie Universität Berlin
2015-2025
Max Planck Institute for Meteorology
2019
The variability of results from different automated methods detection and tracking extratropical cyclones is assessed in order to identify uncertainties related the choice method. Fifteen international teams applied their own algorithms same dataset—the period 1989–2009 interim European Centre for Medium-Range Weather Forecasts (ECMWF) Re-Analysis (ERAInterim) data. This experiment part community project Intercomparison Mid Latitude Storm Diagnostics (IMILAST; see...
Abstract. Europe frequently experiences a wide range of extreme events and natural hazards, including heatwaves, precipitation, droughts, cold spells, windstorms, storm surges. Many these do not occur as single but rather show multivariate character, known compound events. We investigate the interactions between weather events, their characteristics, changes in intensity frequency, well uncertainties past, present, future. also explore impacts on various socio-economic sectors Germany...
Abstract. To manage Earth in the Anthropocene, new tools, institutions, and forms of international cooperation will be required. Virtualization Engines is proposed as an federation centers excellence to empower all people respond immense urgent challenges posed by climate change.
For Northern Hemisphere extra-tropical cyclone activity, the dependency of a potential anthropogenic climate change signal on identification method applied is analysed.This study investigates impact used algorithm changing signal, not robustness itself.Using one single transient AOGCM simulation as standard input for eleven state-of-the-art methods, patterns model simulated present day climatologies are found to be close those computed from re-analysis, independent applied.Although...
Extra-tropical cyclones in the subantarctic play a central role poleward transport of heat and moisture into Antarctica, with latter being key component mass balance Antarctic ice sheet. As climate this region undergoes substantial changes, it is anticipated that character these synoptic features will change. There are number different methods used to identify track cyclones, which can potentially lead conclusions as cyclone variability trends, mechanisms drive features. Given this, timely...
ABSTRACT This article investigates extratropical winter cyclone activity in the Southern Hemisphere (SH) a multi‐model ensemble (MME) of coupled atmosphere–ocean general circulation model ( AOGCM ) simulations recent and potential future climate conditions. Most individual models also mean yield good reproductions typical characteristics found reanalysis data, although some show peculiarities, large inter‐model spread terms quantity identified tracks is found. We use scaling approach to...
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...
The ClimXtreme program[1,2], funded by the German Ministry of Education and Research, consists 25 subprojects investigating extreme events in central Europe focussing on heat/drought, precipitation wind storms. Extreme occurring during project runtime are assessed within research program forming a post-event assessment group (PostAG). This aims at rapid response using both pre-defined methods workflows as well cutting edge program.The basis for is evaluation framework Freva (Free Evaluation...
Abstract This paper investigates climate change signals of Southern Hemisphere (SH) moisture flux simulated by three members one CMIP3 coupled atmosphere–ocean general circulation model (AOGCM) and a multimodel ensemble CMIP5 simulations. Generally, changes are dominated increased atmospheric due to temperature increase in the future projections. An approach is presented distinguish between thermodynamical dynamical influences on flux. Furthermore, physical interpretation transport dynamics...
Abstract. To manage Earth in the Anthropocene, new tools, institutions, and forms of international cooperation will be required. Virtualization Engines are proposed as federation centers excellence to empower all people respond immense urgent challenges posed by climate change.
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...
In the early 1980s, Germany started a new era of modern Antarctic research. The Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research (AWI) was founded important research platforms such as German permanent station in Antarctica, today called Neumayer III, icebreaker Polarstern were installed. primarily focused on Atlantic sector Southern Ocean. parallel, Foundation (Deutsche Forschungsgemeinschaft, DFG) priority program ‘Antarctic Research’ (since 2003 SPP-1158) to foster...
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. Near-term climate predictions such as multi-year to decadal forecasts are increasingly being used guide adaptation measures and building of resilience. To ensure the utility multi-member probabilistic predictions, inherent systematic errors prediction system must be corrected or at least reduced. In this context, have further characteristic features, long-term horizon, lead-time-dependent (drift) in representation changes variability. These features compounded by small ensemble...
Supplementary Figure (SOM) S1: (a) Surface weather analysis produced by The Deutscher Wetterdienst (DWD) at 1200 UTC on 18 January 2018, when windstorm Friederike passed through Germany.(b) As but 3 2018 for Burglind.Charts were downloaded from Wetter3.de (n.d).(c) Mean sea level pressure (thick contours; increasing 960 hPa with 5 intervals) (location of Burglind shown the star) and maximum precipitation intensity (shaded) during 6 hours before after (black circles) based ERA5 reanalysis.The...
The Antarctic Oscillation (AAO) is the dominant mode of atmospheric variability in southern hemisphere.It obtained via a principal component analysis (PCA) for geopotential height anomalies.Being hemisphere's mode, an adequate representation earth system models desirable.This paper evaluates to what extent AAO and related precipitation represented Max Planck Institute's Earth System Model (MPI-ESM).To this end we compare spatial patterns (empirical orthogonal functions, EOFs), spectral...
Abstract. One of the most prominent asymmetric features southern hemispheric (SH) circulation is split jet over Australia and New Zealand in austral winter. Previous studies have developed indices to detect degree which upper-level midlatitude westerlies are investigated relationship between events low-frequency teleconnection patterns, viz. Antarctic Oscillation (AAO) El Niño–Southern (ENSO). As results were inconsistent, wintertime SH climate variability remains unresolved focus this...
The North Atlantic is a crucial region for the prediction of weather and climate America Europe focus this analysis.A skillful decadal surface temperature was shown several Earth system models, with standing out as one higher predictive skill.This skill assessment concentrates on rapid increase annual mean sea subpolar gyre by about 1 K in mid-1990s adjacent years.This event-oriented analysis adds creditability to predictions reveals potential improvements.The ability simulate observed...
The ClimXtreme program, funded by the German Ministry of Education and Research, focuses on assessment frequency intensity historical extreme events their impacts in Central Europe, association with dynamical thermodynamical processes how these might change according to enhanced anthropogenic climate forcing. program currently aims at development a basis for stakeholder decision making that consists data, software, information tailored needs. By means dedicated hazard specific interaction...