Core samples taken from far below the ocean floor are helping a University of Edinburgh geologist to form a picture of dramatic climate changes which took place 30 to 40 million years ago. Dr Bridget Wade is part of an international team of scientists studying climate shifts between the Eocene period – the warmest cycle in the last 65 million years – and the cooler Oligocene period, which saw the first major build-up of Antarctic ice. The study could shed new light on present climate trends as the Eocene climatic regime appears to have established itself rapidly – at a rate comparable to modern global warming – before ending almost as abruptly.
The team of 28 scientists from eight nations is analysing drill cores taken from eight sites near the equator in the Pacific Ocean in October. The cores are the first to be recovered which contain continuous geological records of the Eocene and Oligocene periods. Dr Wade is studying sediment which records the transition 33.7million years ago from the Eocene period – when London was covered by tropical rainforest and crocodiles swam in the River Thames – to the Oligocene period, a time about which scientists know relatively little.
The start of the Oligocene period coincides not only with huge climate shifts, but also with marked changes in the Earth’s oceanography. Scientists detect a shift towards patterns more like those today where wind systems from the northern and southern hemispheres come together and stir the ocean near the equator so that deep, nutrient-rich waters come to the surface and support a diverse, thriving community of plankton. In the Eocene period, the oceanic biological system had been broad and diffuse with low plankton productivity.
Ronald Kerr | alphagalileo
Water - as the underlying driver of the Earth’s carbon cycle
17.01.2017 | Max-Planck-Institut für Biogeochemie
Modeling magma to find copper
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Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
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Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales
Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...
Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...
At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).
Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...
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