IODP team succeeds in recovering sub-seafloor sample
The first 40 million years of Arctic climate history have been recovered from beneath the Arctic seafloor this week. After four days of working in hazardous conditions, the Integrated Ocean Drilling Programs (IODP) Arctic Coring Expedition (ACEX) retrieved 272 meters of core. Extreme sea ice then forced the ship to abandon its position.
Coring of the Arctics first scientific borehole--located roughly 145 miles (233 kilometres) from the North Pole--was interrupted when very thick, moving ice floes threatened the expeditions safety. Even one of the worlds most powerful ice breakers, the Russian Sovetskiy Soyuz, employed to protect the coring ship from harsh Arctic elements, could not safeguard operations at the initial coring site.
As the expedition team searches for another favorable site from which to core, scientists on board the Vidar Viking have examined microfossils in the retrieved core. Initial analyses suggest that some of the material in the cores sediments could be 40 million years old--originating in the Middle Eocene period. The expeditions co-chief scientist, Professor Jan Backman of the University of Stockholm, exclaims, "This is very exciting. For the first time, we are beginning to get information about the history of ice in the central Arctic Ocean." He adds, "This core goes back to a time when there was no ice on the planet--it was too warm. It will tell us a great deal about the climate of the region. It will tell us when it changed from hot to cold, and hopefully, why." Prof. Backman explains that in prehistoric times, life in the Arctic Ocean was much different than today. In warmer conditions and free from ice, marine life thrived. The retrieved Arctic sediments will indicate the type and abundance of marine creatures that lived here back then. The cores were raised from sea depths of about 600 meters, coring depths formerly unmatched in Arctic waters.
Dispersal of Fish Eggs by Water Birds – Just a Myth?
19.02.2018 | Universität Basel
Removing fossil fuel subsidies will not reduce CO2 emissions as much as hoped
08.02.2018 | International Institute for Applied Systems Analysis (IIASA)
At the Hannover Messe 2018, the Bundesanstalt für Materialforschung und-prüfung (BAM) will show how, in the future, astronauts could produce their own tools or spare parts in zero gravity using 3D printing. This will reduce, weight and transport costs for space missions. Visitors can experience the innovative additive manufacturing process live at the fair.
Powder-based additive manufacturing in zero gravity is the name of the project in which a component is produced by applying metallic powder layers and then...
Physicists at the Laboratory for Attosecond Physics, which is jointly run by Ludwig-Maximilians-Universität and the Max Planck Institute of Quantum Optics, have developed a high-power laser system that generates ultrashort pulses of light covering a large share of the mid-infrared spectrum. The researchers envisage a wide range of applications for the technology – in the early diagnosis of cancer, for instance.
Molecules are the building blocks of life. Like all other organisms, we are made of them. They control our biorhythm, and they can also reflect our state of...
University of Connecticut researchers have created a biodegradable composite made of silk fibers that can be used to repair broken load-bearing bones without the complications sometimes presented by other materials.
Repairing major load-bearing bones such as those in the leg can be a long and uncomfortable process.
Study published in the journal ACS Applied Materials & Interfaces is the outcome of an international effort that included teams from Dresden and Berlin in Germany, and the US.
Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) together with colleagues from the Helmholtz-Zentrum Berlin (HZB) and the University of Virginia...
Novel highly efficient and brilliant gamma-ray source: Based on model calculations, physicists of the Max PIanck Institute for Nuclear Physics in Heidelberg propose a novel method for an efficient high-brilliance gamma-ray source. A giant collimated gamma-ray pulse is generated from the interaction of a dense ultra-relativistic electron beam with a thin solid conductor. Energetic gamma-rays are copiously produced as the electron beam splits into filaments while propagating across the conductor. The resulting gamma-ray energy and flux enable novel experiments in nuclear and fundamental physics.
The typical wavelength of light interacting with an object of the microcosm scales with the size of this object. For atoms, this ranges from visible light to...
13.04.2018 | Event News
12.04.2018 | Event News
09.04.2018 | Event News
24.04.2018 | Information Technology
24.04.2018 | Earth Sciences
24.04.2018 | Life Sciences