Olaf Pfannkuche

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A large fraction of globally produced methane is converted to CO2 by anaerobic oxidation in marine sediments. Strong geochemical evidence for net methane consumption in anoxic sediments is based on methane profiles, radiotracer experiments and stable carbon isotope data. But the elusive microorganisms mediating this reaction have not yet been isolated, and(More)
More than 50% of the Earth' s surface is sea floor below 3,000 m of water. Most of this major reservoir in the global carbon cycle and final repository for anthropogenic wastes is characterized by severe food limitation. Phytodetritus is the major food source for abyssal benthic communities, and a large fraction of the annual food load can arrive in pulses(More)
High Arctic meiofaunal distribution, standing stock, sediment chemistry and benthic respiratory activity (determined by sediment oxygen consumption using a shipboard technique) were studied in summer 1980 on the NE Svalbard shelf (northern Barents Sea) and along a transect into the Nansen Basin, over a depth range of 240–3920 m. Particulate sediment(More)
ESONET is a proposed sub sea component of the European GMES (Global Monitoring for Environment and Security) to provide strategic long term monitoring capability in geophysics, geotechnics, chemistry, biochemistry, oceanography, biology and fisheries. To provide representative sampling around Europe 10 nodes are proposed in contrasting oceanographic(More)
The project ESONET which is coordinated by IFREMER, France, is a European initiative towards establishing new -and making use of existing- ocean observatories around Europe for observing natural processes that are either very episodic or statistically require long time series. The most important processes are: (1) the episodic release of methane from the(More)
Citation: Sommer S, Clemens D, Yücel M, Pfannkuche O, Hall POJ, Almroth-Rosell E, Schulz-Vogt HN and Dale AW (2017) Major Bottom Water Ventilation Events Do Not Significantly Reduce Basin-Wide Benthic N and P Release in the Eastern Gotland Basin (Baltic Sea). Front. Mar. Sci. 4:18. doi: 10.3389/fmars.2017.00018 Major Bottom Water Ventilation Events Do Not(More)
The analogies between space and deep sea motivated the German Helmholtz Association to setup the joint research program ROBEX (ROBotic Exploration under eXtreme conditions). The programme objectives are to identify, develop and verify technological synergies between the robotic exploration of the Moon and of the deep sea. In both space and deep sea research(More)
ESONET proposes a network of sea floor observatories around the European Ocean Margin from the Arctic Ocean to the Black Sea for strategic long term monitoring as part of a GMES with capability in geophysics, geotechnics, chemistry, biochemistry, oceanography, biology and fisheries. Long-term data collection and alarm capability in the event of hazards(More)
ESONIM seeks to facilitate the establishment of a European Seafloor Observatory Network (ESONET) by providing EU Member State Governments with the technical, legal and financial models and arguments to establish one or more pilot cabled seafloor observatories. The scientific case for establishing seafloor observatories in European waters has been made by(More)