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Why are the biggest and most influential tech companies making deals with oil companies that exacerbate one of the biggest threats to human civilisation?
Category: climatology – Page 128
For the first time, scientists have clearly linked together two types of gamma-ray phenomena in thunderclouds, suggesting that weak bursts of gamma-ray activity might precede lightning flashes in certain conditions.
The two phenomena in question are weak emissions called gamma-ray glows, which last about a minute, and much shorter and more intense terrestrial gamma-ray flashes (TGFs).
Both are known to happen inside thunderclouds, depending on the various positive and negative electrical charges around them, brought on by accelerating electrons. But scientists have never fully understood how the two gamma ray phenomena work together or their link to lightning.
A formerly little-known molecule created in labs by scientists could help future buildings withstand even the most ferocious of storms, tornadoes, and hurricanes by making walls that are virtually indestructible, according to new research from a team of British scientists at the University of Exeter.
The substance is known to researchers and construction experts as graphene, a combination of the prefix graphite and the suffix âene, coined by the German scientist who pioneered it. The product has a wide array of potential applications including anti-corrosive coatings, lubricants, and motor oils. But in the last two decades, a radical new application has become apparent to those who study this innovative new product. The application of graphene in construction became apparent when researchers established that the inclusion of graphene oxide significantly increases both tensile and compressive strength in concrete compositesâin other words, the worldâs most common construction material can be fortified to become a kind of âsuper-concrete.â
The oldest plant ever to be regenerated has been grown from 32,000-year-old seedsâbeating the previous recordholder by some 30,000 years. (Related: ââMethuselahâ Tree Grew From 2,000-Year-Old Seed.â)
A Russian team discovered a seed cache of Silene stenophylla, a flowering plant native to Siberia, that had been buried by an Ice Age squirrel near the banks of the Kolyma River (map). Radiocarbon dating confirmed that the seeds were 32,000 years old.
The mature and immature seeds, which had been entirely encased in ice, were unearthed from 124 feet (38 meters) below the permafrost, surrounded by layers that included mammoth, bison, and woolly rhinoceros bones.
Lightning bolt underwater
Posted in climatology, engineering, physics
Electrochemical cells help recycle CO2. However, the catalytic surfaces get worn down in the process. Researchers at the Collaborative Research Centre 1316 âTransient atmospheric plasmas: from plasmas to liquids to solidsâ at Ruhr-UniversitĂ€t Bochum (RUB) are exploring how they might be regenerated at the push of a button using extreme plasmas in water. In a first, they deployed optical spectroscopy and modelling to analyse such underwater plasmas in detail, which exist only for a few nanoseconds, and to theoretically describe the conditions during plasma ignition. They published their report in the journal Plasma Sources Science and Technology on 4 June 2019.
Plasmas are ionised gases: they are formed when a gas is energised that then contains free electrons. In nature, plasmas occur inside stars or take the shape of polar lights on Earth. In engineering, plasmas are utilised for example to generate light in fluorescent lamps, or to manufacture new materials in the field of microelectronics. âTypically, plasmas are generated in the gas phase, for example in the air or in noble gases,â explains Katharina Grosse from the Institute for Experimental Physics II at RUB.
Scientists in Japan reported seeing two radioactive weather phenomena at the same time, for the first time, according to a new paper. The observation establishes a link between the two, adding to our knowledge of the wild physics that takes place inside thunderstorms.
The researchers reported the âunequivocal simultaneous detectionâ of a minute-long âgamma-ray glowâ followed by a powerful, millisecond-long âterrestrial gamma-ray flash,â or TGF. Though scientists have observed these two events before, they donât quite understand the connection betweenâthe glows and flashes have never been observed together. That is, until now.
Synthetic Ball-Lightning:
How to make a Stable Plasmoid ( Ball Lightning ) with the GMR v1.0 ( Graphite Microwave Resonator )by Jean-Louis NaudinCliquez ici pour la version Française created on March 1st, 2003 â JLN Labs â Last update December 22, 2005freely.
Thousands of years ago, glaciers covered much of the planet. Oceans receded as water froze in massive sheets of ice blanketing the North American continent. As the ice age ended, glaciers melted. Massive river deltas flowed out across the continental shelf. The oceans rose, and fresh water was trapped in sediments below the waves. Discovered while drilling for oil offshore in the 1970s, scientists thought these âisolatedâ pockets of fresh water were a curiosity. They may instead prove to be a parched worldâs newest source of fresh water.
As told in the latest issue (paywall) of the peer-reviewed journal Scientific Reports, scientists from Columbia University and the Woods Hole Oceanographic Institution spent 10 days on a research ship towing electromagnetic sensors from New Jersey to Massachusetts. By measuring the way electromagnetic waves traveled through fresh and saline water, researchers mapped out fresh-water reservoirs for the first time.
It turns out the subterranean pools stretch for at least 50 miles off the US Atlantic coast, containing vast stores of low-salinity groundwater, about twice the volume of Lake Ontario. The deposits begin about 600 ft (183 m) below the seafloor and stretch for hundreds of miles. That rivals the size of even the largest terrestrial aquifers.
The upgrades include changes to make AI programming simplerâand to speed up powerful machines for specific AI tasks.
The news: The International Supercomputing Conference (ISC) kicked off in Frankfurt yesterday with the release of the latest list of the 500 most powerful supercomputers in the world. US machines still top the ranking, but China has the most computers on the list (219 versus 116 for the US).
Supercomputers have already turbocharged some AI applications. For example. the USâs Summit supercomputer (pictured above), which leads the Top 500, has already run a complex machine-learning model for climate research faster than any other machine.