A5066868486- Marine and coastal ecosystems
- Oceanographic and Atmospheric Processes
- Geology and Paleoclimatology Research
- Marine Biology and Ecology Research
- Methane Hydrates and Related Phenomena
- Marine and environmental studies
- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Rock Mechanics and Modeling
- Marine and fisheries research
- Water Quality Monitoring Technologies
- Hydrocarbon exploration and reservoir analysis
- Toxic Organic Pollutants Impact
- Endodontics and Root Canal Treatments
- Landslides and related hazards
- Geological formations and processes
- Coastal and Marine Dynamics
- Radioactive element chemistry and processing
- Mining and Gasification Technologies
- Planetary Science and Exploration
- Heavy metals in environment
- Underwater Vehicles and Communication Systems
- Environmental Science and Water Management
- Building materials and conservation
- Peatlands and Wetlands Ecology
Leibniz Institute for Baltic Sea Research
2010-2024
GFZ Helmholtz Centre for Geosciences
2003-2019
Landesamt für Bergbau, Energie und Geologie
2011
Universität Greifswald
2010
German University of Technology
2010
Federal Office for Radiation Protection
2002
The ecological state of the Baltic Sea depends crucially on sufficiently frequent, strong deep water renewal periodic events by inflow oxygen rich saline from North Sea. Due to density stratification these inflows are only source for ventilation. Since early eighties last century frequency has dropped drastically 5 7 major per decade one decade. Wide spread anoxic conditions became usual in central Baltic. rare (MBI) 1993 and 2003 could interrupt bottom temporarily. After more than 10 years...
Following earlier regional assessment studies, such as the Assessment of Climate Change for Baltic Sea Basin and North Region Assessment, knowledge from available literature about future scenario simulations biogeochemical cycles in their uncertainties is assessed. Uncertainties these projections are caused by climate model (including global models experimental setup), unknown nutrient load greenhouse gas emissions (or concentrations) natural variability. The determination reduction...
Abstract. Location, specific topography, and hydrographic setting together with climate change strong anthropogenic pressure are the main factors shaping biogeochemical functioning thus also ecological status of Baltic Sea. The recent decades have brought significant changes in First, rising nutrient loads from land second half 20th century led to eutrophication spreading hypoxic anoxic areas, for which permanent stratification water column limited ventilation deep-water layers made...
Abstract Many coastal seas suffer from expanding bottom‐water deoxygenation and hypoxia primarily because of excessive nutrient loads land. The Baltic Sea in northern Europe has one the largest anthropogenically induced oxygen‐deficient bottom zones world. Despite decrease supply after 1980s, recently observed oxygen consumption rates are higher than ever observed, limiting impact natural ventilation by oxygen‐enriched saltwater intrusions. We have estimated inflows during subsequent...
Abstract In December 2014, an exceptional inflow event into the Baltic Sea was observed, a so‐called Major Inflow (MBI). Such events are important for deep water ventilation in and typically occur every 3–10 years. Based on first observational data sets, this had been ranked as third largest since 100 With help of multinested modeling system, reaching from North Atlantic (8 km resolution) to Western (600 m resolution, which is baroclinic eddy resolving), reproduced detail. The model gave...
Major Baltic Inflows (MBI) have a significant impact on physics, biogeochemistry and marine life in the Sea. Spreading of North Sea water from Danish Straits to Eastern Gotland Basin has been rigorously studied recent decades. Investigations lateral signal propagation using in-situ measurements, which cover area Gulf Finland, are missing. Estonian-Swedish-German-Finnish oceanographic data January 2014 March 2017 were merged analyzed fill gap. Recent MBIs caused considerable changes column...
The Baltic Sea is a coastal sea with the world’s largest anthropogenically induced hypoxic bottom area. Although hypoxia has periodically occurred during sea’s 8,000-year history, rapid rise in population and intensified agriculture after World War II have led to nutrient input levels that made permanent, widespread phenomenon. Efforts since 1980s considerably reduced inputs Sea, but an improved ecological status deep basins of yet be achieved. In fact, areas those reached record size some...
Abstract Intrusions of large amounts dense and oxygen‐rich waters during so‐called Major Baltic Inflows (MBIs) form an essential component the Sea overturning circulation deepwater ventilation. Despite their importance, however, detailed observations processes occurring in central basins MBI are virtually lacking. Here data from a long‐term deployment autonomous profiling platform located center one main presented, providing first direct view modifications dynamics induced by largest MBIs...
Abstract The western Baltic Sea cod (WBC) stock is at historically low levels, mainly attributed to high fishing pressure and recruitment. Stable assessment metrics suggested recovery potential, given appropriate fisheries management measures. However, changing environmental conditions violate stability assumptions, may negatively affect WBC, challenge the resource management. present study explored 42 years of changes in WBC biological parameters. body condition gradually decreased over...
Anthropogenic nitrogen input to the western Baltic Sea has continued decline, by about 30% since 1995, whereas phosphorus input, after a strong decrease of 25% from 1995 2000, remained almost on same level. Despite this development, Arkona and Belt apparently show no changes nutrient concentrations in last two decades. In study, we investigate nitrate, nitrite, ammonium, DIN (dissolved inorganic nitrogen), dissolved (DIP), Total (TN) (TP), as substances major concern respect eutrophication...
Coastal low-lying areas along the southern Baltic Sea provide good conditions for coastal peatland formation. During Holocene, transgression of Littorina has caused flooding, submergence and erosion ancient coastlines former terrestrial material. The present Heiligensee & Hütelmoor (located near Rostock in Northern Germany) was found to continue more than 90 m front coastline based on on- offshore sediment cores geo-acoustic surveys. seaward areal extent is estimated with 0.16-0.2km2. limit...
The Baltic Sea is a marginal sea characterized by stagnation periods of several years. Oxygen consumption in its deep waters leads to the buildup sulfide from sulfate reduction. Some microorganisms responsible for these processes also transform reactive ionic mercury neurotoxic methylmercury. Episodic inflows oxygenated saline water North temporally re-establish oxic life Sea. Thus, this an especially important region better understand species distributions connection with variable redox...
Abstract Semi‐enclosed marginal seas like the Baltic Sea are often characterized by permanently anoxic deep layers, and may therefore serve as important model systems to study causes consequences of predicted global expansion oxygen minimum zones. Here, we focus on role lateral intrusions in maintaining “hypoxic transition zone” (HTZ) Sea, which characterizes quasi‐permanent hypoxic region located between oxygenized surface layer sulfidic deep‐water region. Based long‐term deployments an...
Major Baltic inflow (MBI) events carry highly saline water from the North Sea to central and thereby affect both its environmental conditions biota. While bacterioplankton communities in are strongly structured by salinity, how MBIs impact composition distribution of bacteria is unknown. The exceptional MBI 2014, which brought oxygenated into basins Sea, enabled linkage microbiological investigations hydrographic modelling studies this MBI. Using sequence data 16S ribosomal RNA (rRNA) rRNA...
Abstract Samples of fine‐grained (approximately 9 µm) and coarse‐grained 45 hematite ores with almost random crystallographic preferred orientation (CPO) were deformed in high pressure, temperature (400 MPa, 850–1 000 °C) torsion experiments up to shear strains 4.7. large initial grain size, preferably by dislocation creep attended dynamic recrystallization, showed size reduction a weak CPO (J ∼ 1.4 at 950 °C). In contrast, ores, mainly boundary sliding accompanied activity slip on the...