Aurora Australis--the Southern Lights--over the geodesic dome at the National Science Foundations Amundsen-Scott South Pole Station. The aluminum dome has housed the main station buildings since the 1970s. The Amundsen-Scott station is one of three United States research stations on Antarctica. The National Science Foundation operates them all.
The Aurora Australis is the atmospheric phenomenon known familiarly as the Southern Lights. Like its more familiar counterpart, the Aurora Borealis--or Northern Lights, the phenomenon is caused by the solar wind passing through the upper atmosphere. But the Aurora Australis is far less frequently observed because so few people live in Antarctica during the austral winter.
Photo Credit: Jonathan Berry, National Science Foundation
Magnetic fields explosively release energy in events throughout the universe, from experiments conducted in laboratories to huge outbursts within galaxies. On the Sun, these magnetic explosions are responsible for solar flares and ejections of material from the Sun’s corona.
Similar events associated with Earth’s magnetic field drive magnetic storms, and the dramatic brightening and expansion of the northern and southern lights, the aurora borealis and aurora australis. The reconnection of twisted and complex lines of magnetic force relates these phenomena to each other.
Scientists have long debated whether the fast release of energy that occurs during "magnetic reconnection" is a smooth or turbulent process. Scientists funded by NSF have now used large-scale computer simulations, combined with direct observations from satellites, to show that the energy release is likely the result of turbulent processes.
Cheryl Dybas | NSF
Multi-year submarine-canyon study challenges textbook theories about turbidity currents
12.12.2017 | Monterey Bay Aquarium Research Institute
How do megacities impact coastal seas? Searching for evidence in Chinese marginal seas
11.12.2017 | Leibniz-Institut für Ostseeforschung Warnemünde
MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.
Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...
Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...
Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...
The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong
Light-weight and simultaneously strong – porous metallic nanomaterials promise interesting applications as, for instance, for future aeroplanes with enhanced...
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