A5029536880- Hydrology and Watershed Management Studies
- Climate change and permafrost
- Cryospheric studies and observations
- Arctic and Antarctic ice dynamics
- Climate variability and models
- Flood Risk Assessment and Management
- Peatlands and Wetlands Ecology
- Soil erosion and sediment transport
- Geological Studies and Exploration
- Soil and Water Nutrient Dynamics
- Atmospheric and Environmental Gas Dynamics
- Hydrology and Drought Analysis
- Geological Formations and Processes Exploration
- Water resources management and optimization
- Hydrological Forecasting Using AI
- Geology and Environmental Impact Studies
- demographic modeling and climate adaptation
- Mining and Gasification Technologies
- Integrated Water Resources Management
- Climate change impacts on agriculture
- Environmental and Social Impact Assessments
- Tropical and Extratropical Cyclones Research
- Plant Water Relations and Carbon Dynamics
- Atmospheric chemistry and aerosols
- Water Quality and Pollution Assessment
Potsdam Institute for Climate Impact Research
2019-2024
University of Alaska Fairbanks
2016-2023
Leibniz Association
2020-2022
Brandenburg University of Technology Cottbus-Senftenberg
2012-2017
Siemens (Germany)
2017
Norsk Hydro (Germany)
2017
Federal Institute of Hydrology
2016
Abstract. Global water models (GWMs) simulate the terrestrial cycle on global scale and are used to assess impacts of climate change freshwater systems. GWMs developed within different modelling frameworks consider underlying hydrological processes, leading varied model structures. Furthermore, equations describe various processes take forms generally accessible only from individual codes. These factors have hindered a holistic detailed understanding how operate, yet such an is crucial for...
Abstract. This paper describes the rationale and protocol of first component third simulation round Inter-Sectoral Impact Model Intercomparison Project (ISIMIP3a, http://www.isimip.org, last access: 2 November 2023) associated set climate-related direct human forcing data (CRF DHF, respectively). The observation-based forcings for time include high-resolution observational climate derived by orographic downscaling, monthly to hourly coastal water levels, wind fields with historical tropical...
Abstract. This paper describes the rationale and protocol of first component third simulation round Inter-Sectoral Impact Model Intercomparison Project (ISIMIP3a, www.isimip.org) associated set climate-related direct human forcing data (CRF DHF, respectively). The observation-based forcings for time include high-resolution observational climate derived by orographic downscaling, monthly to hourly coastal water levels, wind fields with historical tropical cyclones. DHFs land use patterns,...
Abstract Arctic river discharge has increased in recent decades although sources and mechanisms remain debated. Abundant literature documents permafrost thaw mountain glacier shrinkage over the past decades. Here we link runoff to aquifer recharge via a losing headwater stream subarctic Interior Alaska. Field measurements Jarvis Creek (634 km 2 ), subbasin of Tanana Yukon Rivers, show meltwater as large component (15–28%) total annual streamflow despite low cover (3%). About half is lost (38...
Abstract Global Water Models (GWMs), which include Hydrological, Land Surface, and Dynamic Vegetation Models, present valuable tools for quantifying climate change impacts on hydrological processes in the data scarce high latitudes. Here we performed a systematic model performance evaluation six major Pan-Arctic watersheds different indicators (monthly seasonal discharge, extremes, trends (or lack of), snow water equivalent (SWE)) via novel Aggregated Performance Index (API) that is based...
Abstract Amplified climate warming has led to permafrost degradation and a shortening of the winter season, both impacting cost-effective overland travel across Arctic. Here we use, for first time, four state-of-the-art Land Surface Models that explicitly consider ground freezing states, forced by subset bias-adjusted CMIP5 General Circulation estimate impact different global scenarios (RCP2.6, 6.0, 8.5) on two modes travel: days (OTDs) ice road construction (IRCDs). We show OTDs decrease...
Abstract Boreal forests efficiently insulate underlying permafrost. The magnitude of this insulation effect is dependent on forest density and composition. A change therein modifies the energy water fluxes within below canopy. direct influence climatic indirect through a in permafrost dynamics lead to extensive ecosystem shifts such as composition or density, which will, turn, affect persistence. We derive future scenarios plant functional type by analyzing projections provided dynamic...
Abstract Climate change impact assessments form the basis for development of suitable climate adaptation strategies. For this purpose, ensembles consisting stepwise coupled models are generally used [emission scenario → global circulation model downscaling approach (DA) bias correction (hydrological model)], in which every item is affected by considerable uncertainty. The aim current study (1) to analyse uncertainty related choice DA as well hydrological and its parameterization (2) evaluate...
Abstract Arctic ecosystems are particularly vulnerable to climate change because of amplification. Here, we assessed the climatic impacts low-end, 1.5 °C, and 2.0 °C global temperature increases above pre-industrial levels, on warming terrestrial in northern high latitudes (NHL, 60 °N including pan-Arctic tundra boreal forests) under framework Inter-Sectoral Impact Model Intercomparison Project phase 2b protocol. We analyzed simulated changes net primary productivity, vegetation biomass,...
This flood hazard study is the first step towards linking global and local scales of risk assessment under International Flood Initiative ( IFI ) Flagship Project. To simulate river discharges, we utilised a 600‐arcsec grid block‐wise TOP BTOP model to represent scale constructed 15‐arcsec for Rhine River basin. Both models showed similar statistical performances with observed daily flows, especially 1993 1995 floods. For both scales, calculated peak discharges using Gumbel distribution...
Vast mosaics of lakes, wetlands, and rivers on the Arctic Coastal Plain give impression water surplus. Yet long winters lock freshwater resources in ice, limiting habitats supply for human uses. Increasingly petroleum industry relies lakes to build temporary ice roads winter oil exploration. Permitting withdrawal Alaska is dependent lake depth, thickness, fish species present. Recent warming suggests that more will be available ice- road construction, yet high interannual variability...
The choice of the baseline period, intentionally chosen or not, as a reference for assessing future changes any projected variable can play an important role resulting statement. In regional climate impact studies, well-established arbitrarily baselines are often used without being questioned. Here we investigated effects different periods on interpretation discharge simulations from eight river basins in period 1960–2099. were forced by four bias-adjusted and downscaled Global Climate...
Lakes are dominant and diverse landscape features in the Arctic, but conventional land cover classification schemes typically map them as a single uniform class. Here, we present detailed lake-centric geospatial database for an Arctic watershed northern Alaska. We developed GIS dataset consisting of 4362 lakes that provides information on lake morphometry, hydrologic connectivity, surface area dynamics, surrounding terrestrial ecotypes, other important conditions describing lakes. Analyzing...
Abstract The terrestrial carbon sink provides a critical negative feedback to climate warming, yet large uncertainty exists on its long‐term dynamics. Here we combined biosphere models (TBMs) and projections, together with climate‐specific land use change, investigate both the trend interannual variability (IAV) of from 1986 2099 under two representative concentration pathways RCP2.6 RCP6.0. results reveal saturation by end this century RCP6.0 due warming declined CO 2 effects. Compared...
Climate change is most pronounced in the northern high latitude region. Yet, climate observations are unable to fully capture regional-scale dynamics due sparse weather station coverage, which limits our ability make reliable climate-based assessments. A set of simulated data products was therefore developed for North Slope Alaska through a dynamical downscaling approach. The polar-optimized Weather Research & Forecast (Polar WRF) model forced by three sources: ERA-interim reanalysis (for...
Abstract. Global water models (GWMs) simulate the terrestrial cycle, on global scale, and are used to assess impacts of climate change freshwater systems. GWMs developed within different modeling frameworks consider underlying hydrological processes, leading varied model structures. Furthermore, equations describe various processes take forms generally accessible only from individual codes. These factors have hindered a holistic detailed understanding how operate, yet such an is crucial for...
Glacier melt water is a critical fresh contribution of stream discharge for many regions and in high latitudes glacier extent decreasing with climate warming. However, characteristics glacierized contributions to subarctic watershed-scale geochemistry runoff have attracted limited attention. Tracer studies dominated watersheds are also commonly few days. We conducted six-year geochemical hydrograph separation study season daily streamflow watershed Interior Alaska estimate glacier, rain,...
Abstract Permafrost temperatures are increasing globally with the potential of adverse environmental and socio-economic impacts. Nonetheless, attribution observed permafrost warming to anthropogenic climate change has relied mostly on qualitative evidence. Here, we compare long temperature records from 15 boreholes in northern hemisphere simulated ground Earth system models contributing CMIP6 using a detection approach. We show that neither pre-industrial variability nor natural drivers...
The Soil and Water Integrated Model (SWIM) was used to assess potential climate land-use change impacts in the Central European catchments of Schwarze Elster, Spree Lusatian Neisse which are heavily influenced by opencast lignite mining. To account for change, scenarios two statistical regional models, STAR WettReg, were used. Regional anthropogenic considered terms increasing cultivation energy crops (oilseed rape, silage maize, sunflower sorghum) decreasing mining activities (decreasing...
Abstract The densely populated delta of the three river systems Ganges, Brahmaputra and Meghna is highly prone to floods. Potential climate change-related increases in flood intensity are therefore major societal concern as more than 40 million people live flood-prone areas downstream Bangladesh. Here we report on new projections using a hydrological model forced by bias-adjusted ensembles latest-generation global models CMIP6 (SSP5-8.5/SSP1-2.6) comparison CMIP5 (RCP8.5/RCP2.6). Results...
Abstract. Climatic changes are most pronounced in northern high latitude regions. Yet, there is a paucity of observational data, both spatially and temporally, such that regional-scale dynamics not fully captured, limiting our ability to make reliable projections. In this study, group dynamical downscaling products were created for the period 1950 2100 better understand climate change its impacts on hydrology, permafrost, ecosystems at resolution suitable Alaska. An ERA-interim reanalysis...
Abstract. Climatic changes are most pronounced in northern high latitude regions. Yet, there is a paucity of observational data, both spatially and temporally, such that regional-scale dynamics not fully captured, limiting our ability to make reliable projections. In this study, group dynamical downscaling products were created for the period 1950 2100 better understand climate change its impacts on hydrology, permafrost, ecosystems at resolution suitable Alaska. An ERA-interim reanalysis...