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
"Airlift" facility: TU Freiberg tests new mining technology in research and training mine
22.10.2019 | Technische Universität Bergakademie Freiberg
Atmospheric pressure impacts greenhouse gas emissions from leaky oil and gas wells
21.10.2019 | University of British Columbia
Researchers have succeeded in creating an efficient quantum-mechanical light-matter interface using a microscopic cavity. Within this cavity, a single photon is emitted and absorbed up to 10 times by an artificial atom. This opens up new prospects for quantum technology, report physicists at the University of Basel and Ruhr-University Bochum in the journal Nature.
Quantum physics describes photons as light particles. Achieving an interaction between a single photon and a single atom is a huge challenge due to the tiny...
A very special kind of light is emitted by tungsten diselenide layers. The reason for this has been unclear. Now an explanation has been found at TU Wien (Vienna)
It is an exotic phenomenon that nobody was able to explain for years: when energy is supplied to a thin layer of the material tungsten diselenide, it begins to...
Researchers at Ludwig-Maximilians-Universitaet (LMU) in Munich have explored the initial consequences of the interaction of light with molecules on the surface of nanoscopic aerosols.
The nanocosmos is constantly in motion. All natural processes are ultimately determined by the interplay between radiation and matter. Light strikes particles...
Particles that are mere nanometers in size are at the forefront of scientific research today. They come in many different shapes: rods, spheres, cubes, vesicles, S-shaped worms and even donut-like rings. What makes them worthy of scientific study is that, being so tiny, they exhibit quantum mechanical properties not possible with larger objects.
Researchers at the Center for Nanoscale Materials (CNM), a U.S. Department of Energy (DOE) Office of Science User Facility located at DOE's Argonne National...
A new research project at the TH Mittelhessen focusses on the development of a novel light weight design concept for leisure boats and yachts. Professor Stephan Marzi from the THM Institute of Mechanics and Materials collaborates with Krake Catamarane, which is a shipyard located in Apolda, Thuringia.
The project is set up in an international cooperation with Professor Anders Biel from Karlstad University in Sweden and the Swedish company Lamera from...
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