A5030032939- Marine and coastal ecosystems
- Oceanographic and Atmospheric Processes
- Water Quality Monitoring and Analysis
- Analytical Chemistry and Sensors
- Methane Hydrates and Related Phenomena
- Geology and Paleoclimatology Research
- Water Quality Monitoring Technologies
- Gas Sensing Nanomaterials and Sensors
- Marine Biology and Ecology Research
- Marine and environmental studies
- Marine and fisheries research
- Climate variability and models
- Advanced Chemical Sensor Technologies
- Geological formations and processes
- Ocean Acidification Effects and Responses
- Atmospheric and Environmental Gas Dynamics
- Isotope Analysis in Ecology
- Aquatic and Environmental Studies
- Geological and Geochemical Analysis
- Electrochemical Analysis and Applications
- Mechanical and Optical Resonators
- Groundwater and Isotope Geochemistry
- Magnetic and Electromagnetic Effects
- Spectroscopy and Laser Applications
- Nuclear Physics and Applications
Leibniz Institute for Baltic Sea Research
2014-2024
National Oceanography Centre
2001-2008
University of Southampton
2008
Kiel University
1996
Abstract. In this paper we provide an overview of new knowledge on oxygen depletion (hypoxia) and related phenomena in aquatic systems resulting from the EU-FP7 project HYPOX ("In situ monitoring hypoxic ecosystems coastal open seas, landlocked water bodies", http://www.hypox.net). view anticipated loss due to eutrophication climate change, was set up improve capacities monitor hypoxia as well understand its causes consequences. Temporal dynamics spatial patterns were analyzed field studies...
Plastics and microplastics increasingly gain importance due to their perils wide distribution in the marine environment. Microfibers account for largest percentage of anthropogenic-induced microparticles, which inter alia, consist plastic, are found deep-sea sediments. However, sinking fibers from surface through water column seafloor is still poorly understood. The present study investigates microfibers extracted sediment trap samples, were deployed North Atlantic Subtropical Gyre (NASG)....
Subterranean estuaries the, subsurface mixing zones of terrestrial groundwater and seawater, substantially influence solute fluxes to the oceans. Solutes brought by from land solutes sea can undergo biogeochemical reactions. These are often mediated microbes controlled reactions with coastal sediments, determine composition fluids discharging STEs (i.e., submarine discharge), which may have consequences showing in ecosystems. While at local scale (meters), processes been intensively studied,...
A numerical model that was forced with reconstructed sea surface temperature and salinity values of the North Atlantic used to investigate three major states ocean circulation since last glaciation: modern state, glacial maximum (LGM), an important meltwater event (MWE) near 14,200–13,200 14 C yr B.P. Preliminary results experiments show significant differences outlined modes in northern especially Norwegian Greenland Seas (NGS). The overturning strength conveyor belt northward heat...
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...
Evaluating the health status of marine ecosystems becomes ever increasingly important especially against backdrop rising pressures from human activities. This is true for coastal seas such as Baltic Sea that surrounded by highly industrialized countries. Nutrients and pollutants nitrate hydrogen sulfide, which have a major impact on ecosystem functioning, are two several key environmental indicators assessing natural waters, therefore considerable interest. The frequency spatial coverage...
A Lagrangian analysis of particles sinking through a velocity eld observed by Eulerian frame measurements was used to evaluate the effects horizontal advection and particle speed on uxes as measured moored sediment traps.Characteristics statistical funnel above deep-ocean traps at German JGOFS quasi-time series station 47N, 20W (Biotrans site) were determined.The suggests that distance direction between given trap region surface where produced depends mean particles, deployment depth...
We report evidence for active hydrothermal venting along two back‐arc spreading centers of the NE Lau Basin: Fonualei Rift and Spreading Center (FRSC) Northeast (NELSC). The ridge segments investigated here are particular interest as potential source a mid‐water plume (1500–2000 m depth) which extends more than 2000 km across SW Pacific Ocean dispersing away from an apparent origin close to most northeastern limits Basin. Our results indicate presence at least four new sources, three FRSC...
Polydimethylsiloxane (PDMS) has been introduced the first time about 20 years ago. This polymer is worldwide used for rapid prototyping of microfluidic device through a replica molding process. However, great popularity PDMS not only related to its easy processability, but also chemical and physical properties. For interesting properties, implied several applications, including sensing. In this work, we investigated how use functionalized membranes as sensing elements in optical sensors gas...
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...
Abstract. This note describes a profiling mooring with an interdisciplinary suite of sensors taking profiles between 180 and 30 m depth. It consists underwater winch, moored below depth, instrumentation platform. In its described setup it can take about 200 at pre-programmed times or intervals one set batteries. allows for studies over extended period time (e.g. two daily 3 months). The Gotland Deep Environmental Sampling Station (GODESS) in the Eastern Basin Baltic Sea is aimed...
The Atlantic Meridional Overturning Circulation (AMOC) and its surface limb, the Gulf Stream, are in their weakest state since last millennium. consequences of this weakening Northeast not yet known. We show that slowdown Stream 1960s, 1970s, after 2000 may have caused a delayed Azores Current. Concurrently, Front associated with Current migrated northward 1970s due to gradual changes Multidecadal Oscillation ocean heat content. argue AMOC is also detectable low-energy region dynamics...
Abstract In most observations of diffusive convection in the ocean and lakes, characteristic staircases evolve over long time scales under quasi-stationary background conditions. Baltic Sea, however, develop inside flanks intermittent intrusions that induce strong inverse temperature gradients a vertical range few meters, varying on hours to days. Here, results are discussed from an extensive field campaign conducted summer 2016 southern including microstructure data gliders autonomous...
A new sensor for in situ, real time methane (CH4) measurements aqueous environments is based on the refractive index (RI) modulation of a sensitive film composed polydimethylsiloxane (PDMS) layer incorporating molecules cryptophane-A. The RI varies according to amount CH4 bound cryptophane-A and determined using surface plasmon resonance (SPR). Tests summer 2012 reveal expansive range conditions Central Baltic Sea with concentrations varying from 5 nM up few hundred nanomolar. showed...
Abstract. There is an international commitment to develop a comprehensive, coordinated and sustained ocean observation system. However, foundation for any observing, monitoring or research effort effective reliable in situ sensor technologies that accurately measure key environmental parameters. Ultimately, the data used modelling efforts, management decisions rapid responses hazards are only as good instruments collect them. also compelling need incorporate new novel improve all aspects of...
Abstract. In this paper we synthesize the new knowledge on oxygen and oxygen-related phenomena in aquatic systems, resulting from EU-FP7 project HYPOX ("In situ monitoring of depletion hypoxic ecosystems coastal open seas, land-locked water bodies", www.hypox.net). view anticipated loss systems due to eutrophication climate change, was set up improve capacities monitor hypoxia as well understand its causes consequences. Temporal dynamics spatial patterns were analysed field studies various...
A METals In Situ analyzer (METIS) has been used to determine dissolved manganese (II) concentrations in the subhalocline waters of Gotland Deep (central Baltic Sea). High-resolution situ measurements total Mn were obtained near real-time by spectrophotometry using 1-(2-pyridylazo)-2-naphthol (PAN). PAN is a complexing agent and forms wine-red complex with maximum absorbance at wavelength 562 nm. Results are presented together ancillary temperature, salinity, O 2 data. Lab calibration was...