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
Colorado River's connection with the ocean was a punctuated affair
16.11.2017 | University of Oregon
Researchers create largest, longest multiphysics earthquake simulation to date
14.11.2017 | Gauss Centre for Supercomputing
The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.
Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...
Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.
That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...
Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.
During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....
The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.
Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...
Pillared graphene would transfer heat better if the theoretical material had a few asymmetric junctions that caused wrinkles, according to Rice University...
15.11.2017 | Event News
15.11.2017 | Event News
30.10.2017 | Event News
17.11.2017 | Physics and Astronomy
17.11.2017 | Health and Medicine
17.11.2017 | Studies and Analyses