A5020721530- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Geological Studies and Exploration
- Climate change and permafrost
- Isotope Analysis in Ecology
- Indigenous Studies and Ecology
- Atmospheric and Environmental Gas Dynamics
- Image Processing and 3D Reconstruction
- Microbial Community Ecology and Physiology
- Research Data Management Practices
- Insurance, Mortality, Demography, Risk Management
- Peatlands and Wetlands Ecology
- Cryospheric studies and observations
- Big Data Technologies and Applications
- Geochemistry and Geologic Mapping
University of Potsdam
2021-2023
Einstein Center Digital Future
2021-2023
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2020-2023
Humboldt-Universität zu Berlin
2021-2023
Abstract Detailed organic geochemical and carbon isotopic (δ 13 C Δ 14 C) analyses are performed on permafrost deposits affected by coastal erosion (Herschel Island, Canadian Beaufort Sea) adjacent marine sediments Basin) to understand the fate of in Arctic nearshore environments. We use an end‐member model based composition bulk matter identify sources carbon. Monte Carlo simulations applied quantify contribution sedimentary budget. The models suggest that ~40% all released local is...
When performing spatial-temporal investigations of multiple lake systems, geoscientists face the challenge dealing with complex and heterogeneous data different types, structure, format. To support comparability, it is necessary to transform such into a uniform format that ensures syntactic semantic comparability. This paper presents science approach for transforming research from sediment cores coherent framework. For this purpose, we collected published unpublished paleolimnological Arctic...
Abstract. Lakes act as important sinks for inorganic and organic sediment components. However, investigations of sedimentary carbon budgets within glacial lakes are currently absent from Arctic Siberia. The aim this paper is to provide the first reconstruction accumulation rates, a lacustrine core Lake Rauchuagytgyn, Chukotka (Arctic Siberia). We combined multiple biogeochemical sedimentological parameters radiocarbon-dated 6.5 m with lake basin hydroacoustic data derive stratigraphy,...
Millennial-scale climate change history in eastern Siberia and relationships between diatom diversity, paleoclimate, sediment-geochemical lake system trajectories are still poorly understood. This study investigates multi-proxy time series reaching back to the Late Pleistocene derived from radiocarbon dated Lake Bolshoe Toko sediment cores, southeastern Yakutia, Russia. We analyzed diatoms, elements (XRF), minerals (XRD), grain-size, organic carbon, included chironomid analyses published...
Abstract. This study is based on multiproxy data gained from a 14C-dated 6.5 m long sediment core and 210Pb-dated 23 cm short retrieved Lake Rauchuagytgyn in Chukotka, Arctic Russia. Our main objectives are to reconstruct the environmental history ecological development of lake during last 29 kyr investigate drivers behind bioproduction shifts. The methods comprise age-modeling, accumulation rate estimation, light microscope diatom species analysis 74 samples, as well organic carbon,...
Introduction: Rising industrial emissions of carbon dioxide and methane highlight the important role sinks sources in fast-changing northern landscapes. Northern lake systems play a key regulating organic input by accumulating their sediment. Here we look at history 28 lakes (between 50°N 80°N) over past 21,000 years to explore relationship between accumulation temperature changes. Method: For this study, calculated rates (OCAR) using measured newly generated dry bulk density data. To...
Abstract. Age–depth relationships are the key elements in paleoenvironmental studies to place proxy measurements into a temporal context. However, potential influencing factors of available radiocarbon data and associated modeling process can cause serious divergences age–depth from true chronologies, which is particularly challenging for paleolimnological Arctic regions. This paper provides geoscientists with tool-assisted approach compare outputs systems strengthen robustness...
Abstract. Lakes act as important sinks for inorganic and organic sediment components. However, investigations of sedimentary carbon budgets within glacial lakes are currently absent from Arctic Siberia. The aim this paper is to provide the first reconstruction accumulation rates, a lacustrine core Lake Rauchuagytgyn, Chukotka (Arctic Siberia). We combined multiple sediment-biogeochemical sedimentological parameters radiocarbon-dated 6.5 m with lake basin hydroacoustic data derive...
Abstract. This study is based on multiproxy data gained from a 14C-dated 6.5 m long sediment core and 210Pb-dated 23 cm short retrieved Lake Rauchuagytgyn in Chukotka, Arctic Russia. The main objectives are to reconstruct the environmental history ecological development of lake during last 29k years investigate drivers behind bioproduction shifts. methods comprise age-modeling accumulation rate estimation, light-microscope diatom species analysis (74 samples), organic carbon, nitrogen,...
<p>Increasing air and sea surface temperatures at high latitudes lead to accelerated thaw, destabilization, erosion of perennially frozen soils (i.e., permafrost), which are often rich in organic carbon. Coastal leads an increased mobilization carbon into the Arctic Ocean that can be converted greenhouse gases may therefore contribute further warming. Carbon decomposition limited if matter is efficiently deposited on seafloor, buried marine sediments thus removed from...
<p>Refined dating techniques and high-precision radiocarbon have enabled more accurate age controls for paleoenvironmental reconstruction of lake systems. However, low bioproductivity the influence old carbon a profound impact on series non-varved sediment records from Arctic lakes. Geochronological tools such as software systems age-depth modeling provide sophisticated justifications relationships. But because there are many different available with varying underlying...
<p>Lake systems play a central role in broadening our knowledge about future trends the Arctic, as their sediments store information on interactions between climate change, lake ontogeny, external abiotic sediment input, and biodiversity changes. In order to make reliable statements trajectories, we need sound multi-proxy data from different lakes across Arctic. Various studies using repositories already showed effectiveness of multi-proxy, multi-site investigations (e.g.,...
Abstract. Age-depth correlations are the key elements in paleoenvironmental studies to place proxy measurements into a temporal context. However, potential influencing factors of available radiocarbon data and associated modeling process can cause serious divergences age-depth from true chronologies, which is particularly challenging for paleolimnological Arctic regions. This paper provides geoscientists with tool-assisted approach compare outputs systems strengthen robustness correlations....