(AGENPARL) – ven 28 luglio 2023 A weekly compendium of media reports on science and technology achievements at Lawrence Livermore National Laboratory. Though the Laboratory reviews items for overall accuracy, the reporting organizations are responsible for the content in the links below.
LLNL Report, July 28, 2023
An atomic-level view of water confined in a small-diameter nanotube. Fast water transport and high selectivity of small-diameter nanotubes can enable advanced water desalination technologies. Illustration concept: Tuan Anh Pham, Fikret Aydin, and Marcos Calegari Andrade/LLNL. Illustration by Ella Maru Studios.
[It’s a bonding experience](https://fagenwasanni.com/news/surprising-behavior-of-water-confined-in-carbon-nanotubes-revealed-in-new-study/76243/)
A recent study conducted by Lawrence Livermore scientists has provided new insights into the behavior of hydrogen bonding of water confined in carbon nanotubes (CNTs).
Using large-scale molecular dynamics simulations and machine learning interatomic potentials derived from first-principles calculations, the researchers discovered that the diameter of the CNT has a significant impact on the water structure, influencing it in a highly complex and nonlinear manner.
Investigating the hydrogen bonding of confined water in nanopores poses a challenge, as it deviates from the behavior of bulk liquid. In this study, the research team computed and compared the infrared (IR) spectrum of confined water with existing experiments to uncover the effects of confinement.
Lead author of the paper, LLNL scientist Marcos Calegari Andrade, said their work provides a platform for simulating water in CNTs with quantum accuracy, surpassing the limitations of conventional first-principles approaches in terms of time and length scales.
[Read More](https://fagenwasanni.com/news/surprising-behavior-of-water-confined-in-carbon-nanotubes-revealed-in-new-study/76243/)
A large portion of Greenland melted about 416,000 years ago — perhaps a bit like the small melt pond shown in this modern Greenland landscape — and became ice-free tundra or a boreal forest. Photo by Joshua Brown/University of Vermont.
Greenland’s famed ice sheet may be more sensitive to human-caused climate change than previously thought, with irreversible melting likely over the coming centuries.
The entire world would be left vulnerable with the rise in sea levels brought on by the ice melting, researchers warned.
Scientists from 16 institutions including Lawrence Livermore National Laboratory, the University of Vermont and Utah State University looked at the stability of the Greenland ice sheet over the last two and a half million years. They found that moderate global warming nearly 400,000 years ago, similar to the rate today, led to at least one fifth of the entire Greenland ice sheet melting, and subsequent sea level rise of five feet.
The five foot rise in sea levels came despite levels of heat-trapping carbon dioxide in the atmosphere being far lower than is seen today. This led to the scientists concluding that Greenland is more at risk than previously believed, and paints an ominous picture for the rest of the world.
[Casting a net for industry](https://www.hpcwire.com/off-the-wire/doe-announces-opportunity-for-industry-to-connect-with-national-labs-to-develop-energy-efficiency-tech/)
The Department of Energy has announced a new solicitation to connect industry partners with the high performance computing (HPC) resources and expertise at DOE’s national laboratories to improve material performance and advance manufacturing processes for an equitable clean energy future.
Through the High Performance Computing for Energy Innovation (HPC4EI) initiative, selected teams will harness the raw processing power of national labs’ supercomputers to apply advanced modeling, simulation and data analysis to manufacturing and materials projects.
HPC4EI is the parent initiative for the HPC4Manufacturing and HPC4Materials Programs. The HPC4EI Summer 2023 Solicitation will fund projects within both programs.
The initiative is managed by Lawrence Livermore National Laboratory.
[Read More](https://www.hpcwire.com/off-the-wire/doe-announces-opportunity-for-industry-to-connect-with-national-labs-to-develop-energy-efficiency-tech/)
A house is engulfed in flames at night during the 2021 disastrous Dixie Fire in Northern California. Image by Adobe Stock.
[Wildfires a hot topic](https://www.voiceamerica.com/episode/145907/recent-ca-wildfires-attributable-to-human-caused-climate-change)
A new study by a Lawrence Livermore scientist and collaborators shows that nearly all the recent increase in California summer wildfire burned area is attributable to human-caused (anthropogenic) climate change.
Anthropogenic simulations yielded burn areas an average of 172% higher than natural variation simulations.
LLNL’s Don Lucas was recently featured in a one-hour program on “Go Green Radio” to discuss the findings and implications for the future.
[Read More](https://www.voiceamerica.com/episode/145907/recent-ca-wildfires-attributable-to-human-caused-climate-change)
An image of Jupiter taken by NASA’s Juno spacecraft from a vantage point above high latitude polar regions. Image by NASA/JPL-Caltech/SwRI/MSSS/David Marriott.
[Jupiter is one old timer](https://indonesia.postsen.com/trends/703731/Jupiter-the-Oldest-Planet-in-the-Solar-System.html)
Scientists estimate that our solar system was formed about 4.6 billion years ago, which was followed by the formation of objects in the solar system.
Based on the latest research, scientists can finally estimate which planet is the oldest in the solar system. The study found that Jupiter’s core had grown to be 20 times more massive than Earth’s just 1 million years after the sun formed.
According to Thomas Kruijer, principal investigator from Lawrence Livermore National Laboratory, Jupiter is the oldest planet in the solar system and its dense core formed long before the solar nebula gas disappeared, consistent with the core accretion model for the formation of giant planets.
The researchers determined the age of Jupiter’s formation and growth by analyzing the age of certain iron meteorites, which are fragments of the metal core from the ancient planet, which have fallen to Earth.
[Read More](https://indonesia.postsen.com/trends/703731/Jupiter-the-Oldest-Planet-in-the-Solar-System.html)
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