A5003012432- Geology and Paleoclimatology Research
- Isotope Analysis in Ecology
- Geological formations and processes
- Hydrology and Watershed Management Studies
- Hydrocarbon exploration and reservoir analysis
- Paleontology and Stratigraphy of Fossils
- Groundwater and Isotope Geochemistry
- Pleistocene-Era Hominins and Archaeology
- Tree-ring climate responses
- Coastal wetland ecosystem dynamics
- Peatlands and Wetlands Ecology
- Methane Hydrates and Related Phenomena
- Archaeology and ancient environmental studies
- Cryospheric studies and observations
- Diatoms and Algae Research
- Geochemistry and Elemental Analysis
- Plant Water Relations and Carbon Dynamics
- Marine and coastal ecosystems
- Soil and Water Nutrient Dynamics
- Climate variability and models
- Hydrology and Drought Analysis
- Soil Carbon and Nitrogen Dynamics
- Coal and Its By-products
- Soil erosion and sediment transport
- Marine and environmental studies
Forschungszentrum Jülich
2015-2024
Ernst Ruska Centre
2023
Institut des Géosciences de l'Environnement
2022
Physikalisch-Technische Bundesanstalt
2021
Stadtwerke Jülich (Germany)
2011-2014
Paderborn University
2012-2013
Institute of Geosphere Dynamics
2009
Humboldt-Universität zu Berlin
2008-2009
University of Tübingen
1999
Technische Universität Braunschweig
1995-1999
Core Ideas We provide an overview of the TERENO-Rur hydrological observatory. present information on general physical characteristics Rur catchment. Ongoing interdisciplinary research aims to advance understanding complex processes. observatory, which is main observational platform TERENO (TERrestrial ENvironmental Observatories) Eifel/Lower Rhine Valley Observatory. The catchment area exhibits distinct gradients in altitude, climate, land use, soil properties, and geology. Eifel National...
A high-resolution multiproxy geochemical approach was applied to the sediments of Laguna Potrok Aike in an attempt reconstruct moist and dry periods during past 16 000 years southeastern Patagonia. The age—depth model is inferred from AMS 14 C dates tephrochronology, suggests conditions Lateglacial early Holocene (16 000—8700 cal. BP) interrupted by drier before beginning (13 200—11 400 BP). Data also imply that this period a major warm phase Patagonia approximately contemporaneous with...
We study fluid flow at the interfaces between elastic solids with randomly rough, self-affine surfaces. show by numerical simulation that deformation lowers relative contact area which patches percolate in comparison to traditional approaches seals. Elastic also suppresses leakage through contacts even far away from percolation threshold. Reliable estimates for can be obtained combining Persson's mechanics theory a slightly modified version of Bruggeman's effective-medium solution Reynolds equation.
Core Ideas To determine the water retention curve from inverse modeling, θ and ψ need to be monitored. δ 18 O ratios contained information inversely estimate soil hydraulic parameters. Different observation types should combined in a single OF Averages of local measurement could described using effective Accurate fluxes at lysimeter boundaries improved model parameterization. estimates parameters dispersivities are crucial simulate flow solute transport terrestrial systems, particularly...
The functional implications of root cortical senescence (RCS) are poorly understood. We tested the hypotheses that RCS in barley (1) reduces respiration and nutrient content tissue; (2) decreases radial water transport; (3) is accompanied by increased suberization to protect stele. Genetic variation for exists between modern germplasm landraces. Nitrogen phosphorus deficiency rate RCS. Maximal RCS, defined as disappearance entire cortex, reduced nitrogen 66%, 63% 87% compared with segments...
Growing energy crops in marginal, nutrient-deficient soils is a more sustainable alternative to conventional cultivation. The use of energy-intensive synthetic fertilizers needs be reduced, preferably via closed nutrient loops the biomass production cycle. In present study based on first growing season mesocosm experiment using large bins outdoors, we evaluated potential plant Sida hermaphrodita grow marginal sandy soil. We applied different fertilization treatments either digestate from...
Abstract. Deforestation can considerably affect transpiration dynamics and magnitudes at the catchment scale thereby alter partitioning between drainage evaporative water fluxes released from terrestrial hydrological systems. However, it has so far remained problematic to directly link reductions in changes physical properties of system quantify these scale. As a consequence, is difficult effect deforestation on parameters catchment-scale models. This turn leads substantial uncertainties...
Oxygen isotope ratios of biogenic silica derived from planktonic diatoms living in the pelagial a freshwater lake are used to determine temperature effect on fractionation between water and under ecosystem conditions. Our data show deterministic relation seasonally changing temperatures (4°C–22°C) oxygen during valve formation. The dependent appears be independent diatom cell sizes indicating mere physical control this process. isotopic change induced per degree centigrade, coefficient,...