A5067425223- Geology and Paleoclimatology Research
- Hydrocarbon exploration and reservoir analysis
- Isotope Analysis in Ecology
- Geological and Geophysical Studies
- Geological Studies and Exploration
- Geological formations and processes
- Methane Hydrates and Related Phenomena
- Pleistocene-Era Hominins and Archaeology
- Tree-ring climate responses
- Groundwater and Isotope Geochemistry
- Marine and environmental studies
- Archaeology and ancient environmental studies
- Toxic Organic Pollutants Impact
- Metabolomics and Mass Spectrometry Studies
- Marine and coastal ecosystems
- Rangeland Management and Livestock Ecology
- Aeolian processes and effects
- Heavy metals in environment
- Microbial bioremediation and biosurfactants
- Coastal wetland ecosystem dynamics
- Plant Water Relations and Carbon Dynamics
- Effects and risks of endocrine disrupting chemicals
- Pesticide and Herbicide Environmental Studies
- Fish Ecology and Management Studies
- Marine Bivalve and Aquaculture Studies
Leibniz Institute of Freshwater Ecology and Inland Fisheries
2019-2024
Forschungsverbund Berlin
2022
University of Potsdam
2014-2021
University of Southern California
2015
Federal Institute For Materials Research and Testing
2012-2015
Southern California Earthquake Center
2015
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2009-2013
University of Bayreuth
2007
Abstract. Central Asia is located at the confluence of large-scale atmospheric circulation systems. It thus likely to be highly susceptible changes in dynamics those systems; however, little still known about regional paleoclimate history. Here we present carbon and hydrogen isotopic compositions n-alkanoic acids from a late Holocene sediment core Lake Karakuli (eastern Pamir, Xinjiang Province, China). Instrumental evidence isotope-enabled climate model experiments with Laboratoire de...
The Of/Oh-horizons of 447 forest stands in Germany were evaluated for concentrations and spatial distribution selected polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs). While dichlorodiphenyltrichloroethane (DDT) PCBs show similar patterns all measured compounds within each compound class, significantly different distributions identified low-molecular-weight PAHs [2- 3-ring plus fluoranthene (FLA) pyrene (PYR)] contrast to...
Abstract The Central Asian Pamir Mountains (Pamirs) are a high‐altitude region sensitive to climatic change, with only few paleoclimatic records available. To examine the glacial‐interglacial hydrological changes in region, we analyzed geochemical parameters of 31‐kyr record from Lake Karakul and performed set experiments climate models interpret results. δD values terrestrial biomarkers showed insolation‐driven trends reflecting major shifts water vapor sources. For aquatic biomarkers,...
We investigated 4.84-m-long sediment record spanning over the Late Glacial and Holocene from Lake Donggi Cona to be able reconstruct circulation pattern on Tibetan Plateau (TP). Presently, is located at boundaries of Westerlies Asian monsoon circulations in northeastern TP. However, exact timing stimulating mechanisms for climatic changes shifts this region are still debated. used a 19-ka-long stable isotope sedimentary n-alkanes address discrepancy by providing insights into...
Abstract. Water stable isotopes (δ18O and δ2H) were analyzed in samples collected lakes, associated with riverine systems northeastern Germany, throughout 2020. The dataset (Aichner et al., 2021; https://doi.org/10.1594/PANGAEA.935633) is derived from water at (a) lake shores (sampled March July 2020), (b) buoys which temporarily installed deep parts of the monthly to October (c) multiple spatially distributed spots four selected lakes (in September (d) outflow Müggelsee biweekly 2020...
Abstract. While of higher plant origin, a specific source assignment sedimentary leaf wax n-alkanes remains difficult. In addition, it is unknown how fast changing catchment vegetation would be reflected in archives. particular, for quantitative interpretation n-alkane C and H isotope ratios terms paleohydrological paleoecological changes, better understanding transfer times dominant sources required. this study we tested to what extent compositional changes can linked known by comparison...
Abstract High-altitude ecosystems react sensitively to hydroclimatic triggers. Here we evaluated the ecological and hydrological changes in a glacier-influenced lake (Hala Hu, China) since last glacial. Rapid fluctuations of aquatic biomarker concentrations, ratios, hydrogen isotope values, from 15 14,000 8 5000 years before present, provided evidence for regime shifts hydrology. In contrast, most negative values terrestrial biomarkers were observed between 9 7,000 present. This shows that...
Abstract River estuaries are characterized by mixing processes between freshwater discharge and marine water masses. Since the first depleted in heavier stable isotopes compared with realm, often show a linear correlation salinity (δ 18 O δ 2 H values). In this study, we evaluated spatial seasonal isotope dynamics along three estuarine lagoon transects, located at northern German Baltic Sea coast. The data strong seasonality of values, even locations furthest from river mouths. They further...
ABSTRACT To elucidate the dynamics of terrestrial leaf waxes in a high-altitude lake system, we performed compound-specific radiocarbon analysis (CSRA) long-chain n -alkanes two sediment core sections from Lake Karakul (Pamirs, Tajikistan) and surface soil samples catchment area. We aimed to answer question whether are delivered into with substantial delay due storage soils, which may cause potential bias when used as paleoenvironmental proxies. In CSRA results reveal an age range modern...
Submerged macrophytes incorporate lake water directly during lipid synthesis, making the δ2H values of their lipids a crucial tool for reconstructing past hydrology and states. Despite this significance, biomarkers aquatic plants have received less attention compared to terrestrial plants. In particular, in context organic geochemical applications, submerged are typically considered as single group, ignoring potential differences distributions hydrogen isotope composition between...