Geothermal energy systems have the potential to power the world and become the leading technology for reducing greenhouse gas emissions if we can drill down far enough into the Earth to access the conditions necessary for economic viability and release the heat beneath our feet. Quaise Inc. is developing a potentially disruptive drilling technology to make that happen. Matt Houde of Quaise presented the approach at the World Geothermal Congress on June 15.
The depths of the Black Sea store comparatively large amounts of organic carbon. A research team led by scientists from the University of Oldenburg, Germany, has now presented a new hypothesis as to why organic compounds accumulate in this semi-enclosed sea and other oxygen-depleted waters. Reactions with hydrogen sulfide play an important role in stabilizing carbon compounds, the researchers posit in the scientific journal Science Advances. This negative feedback in the climate system could counteract global warming over geological periods.
Superconductors have tremendous appeal in power transmission applications due to their zero resistance. However, to bring classical metallic superconductors into superconducting state requires liquid helium as a coolant, which is costly. Now, scientists from Japan take things to the new level by demonstrating high temperature superconductivity in mixed rare-earth barium copper oxides fabricated using a popular technique, opening doors to their low-cost, industrial scale production for real-world applications.
Using a numerical model that simulates ocean currents, researchers are shedding light on the important "motion of the ocean" in the Straits of Florida. They have conducted a first-of-its-kind study identifying the mechanisms behind the formation of sub-mesoscale eddies, which have important environmental implications and play a significant role in the health of the Florida Keys coral reef ecosystem.
MIT physicists have brought a human-scale object to a near-standstill, close to a quantum state.
Marine-terminating glaciers may be less vulnerable to rapid and irreversible collapse than previously suggested, according to a new study, which finds that ice cliff collapse is limited by upstream thinning of the ice sheet and how quickly calved icebergs and sea-ice float away.
Thirty state of the art IPCC-climate models predict dramatically different climates for the Northern Hemisphere, especially Europe. An analysis of the range of responses now reveals that the differences are mostly down to the individual model's simulations of changes to the North Atlantic ocean currents and not only -- as normally assumed -- atmospheric changes.
For the first time, researchers have used precariously-balanced rocks to set the formal design earthquake motions for a major existing engineered structure--the Clyde Dam, the largest concrete dam in New Zealand.
Fearsome and powerful, hurricanes can wreak massive destruction when they hit land. But while most hurricanes then weaken, others can strengthen again into extratropical cyclones and caused further damage inland. Now, researchers at the Okinawa Institute of Science and Technology Graduate University have used simulations to uncover the presence of a cold core inside decaying hurricanes - an unexpected discovery that could help forecasters predict the level of extreme weather that communities farther inland may face.
Not only the 11-year cycle, but also all other periodic solar activity fluctuations can be clocked by planetary attractive forces, a conclusion drawn by Dr. Frank Stefani and colleagues at HZDR and the Institute of Continuous Media Mechanics in Perm, Russia. With new model calculations, they are proposing a comprehensive explanation of known sun cycles for the first time. They also reveal the longest fluctuations in activity over thousands of years as a chaotic process.