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Archive for the ‘climatology’ category: Page 4

Dec 7, 2024

Huge Experiment Gives First Glimpse of The Internal Structure of a Neutron

Posted by in categories: climatology, particle physics, quantum physics

An experiment more than 10 years in the making has delivered its first glimpse of the hurricane of particles whirring inside subatomic particles called neutrons, laying the groundwork to solve a mystery deep in the heart of matter.

Data from the Central Neutron Detector at the US Department of Energy’s Thomas Jefferson National Accelerator Facility (TJNAF) is already playing a role in describing the quantum map of the neutron’s engine.

“It’s a quite important result for the study of nucleons,” says Silvia Niccolai, a research director at the French National Centre for Scientific Research.

Dec 7, 2024

Less is more: Why an economical iridium catalyst works so well

Posted by in categories: chemistry, climatology

Iridium-based catalysts are needed to produce hydrogen using water electrolysis. Now, a team at HZB has shown that the newly developed P2X catalyst, which requires only a quarter of the iridium, is as efficient and stable over time as the best commercial catalyst. Measurements at BESSY II have now revealed how the special chemical environment in the P2X catalyst during electrolysis promotes the oxygen evolution reaction during water splitting.

In the future, hydrogen will be needed in a climate-neutral energy system to store energy, as a fuel, and a raw material for the chemical industry. Ideally, it should be produced in a climate-neutral way, using electricity generated from harnessing the sun’s or wind energy, via the electrolysis of water.

In that respect, Proton Exchange Membrane Water Electrolysis (PEM-WE) is currently considered a key technology. Both electrodes are coated with special electrocatalysts to accelerate the desired reaction. Iridium-based catalysts are best suited for the anode, where the sluggish oxygen evolution reaction occurs. However, iridium is one of the rarest elements on earth, and one of the major challenges is to significantly reduce the demand for this precious metal.

Dec 7, 2024

The largest project in history, under the ocean: 5,000km and two continents linked by this

Posted by in categories: climatology, habitats, solar power, sustainability

Envision a settlement where the sunlight that beams across Australia buoy on its vast outback powers millions of homes and industries across Southeast Asia. This is how the Australia-Asia PowerLink (AAPowerLink) is being realized: the longest sub-sea cable in the world, linking northern Australia to Singapore, presently is one of the all-time break-through renewable energy developments. By virtue of this mammoth solar farm with its advanced energy transmission technology, this ambitious vision will shape the future energy systems around the world while addressing some critical climate issues.

Taking enormous advantage from its plentiful sunlight, northern Australia houses the world’s biggest Solar Precinct in its Northern Territory gathering between 17–20 GW peak electricity, a size surpassing that of Australia’s largest coal-fired power station.

The project incorporates advanced storage of 36–42 GWh, supplying 800 MW to Darwin and 1.75 GW to Singapore. In addition to reducing emissions and electricity prices for the Darwin region, it creates a renewable energy export marketplace for the region and demonstrates the use of the solar-rich area to meet 15 percent of Singapore’s electricity demand.

Dec 6, 2024

New Sulfur Gas Discovered in Oceans Enhances Climate Cooling

Posted by in categories: climatology, sustainability

How much does sulfur emitted by marine life cool the atmosphere and help mitigate the effects of climate change? This is what a recent study published in Science Advances hopes to address as an international team of researchers conducted a first-time numerical analysis regarding the amount of sulfur is emitted by marine life and how much it cools the climate, with an emphasis on the Southern Ocean. This study holds the potential to help researchers, climate scientists, and the public better understand how the planet cools itself, thus enabling us to work together to protect it.

“This is the climatic element with the greatest cooling capacity, but also the least understood,” said Dr. Charel Wohl, who is a senior research associate at the University of East Anglia and lead author of the study. “We knew methanethiol was coming out of the ocean, but we had no idea about how much and where. We also did not know it had such an impact on climate. Climate models have greatly overestimated the solar radiation actually reaching the Southern Ocean, largely because they are not capable of correctly simulating clouds. The work done here partially closes the longstanding knowledge gap between models and observations.”

For the study, the researchers produced a database of ocean methanethiol concentrations with the goal of estimating their produced emissions and how this contributes to ocean-derived aerosols that are responsible for cooling the planet. In the end, the researchers discovered that methanethiol emissions increase the aerosol amount between 30 to 70 percent over the Southern Ocean while simultaneously decreasing atmospheric oxidants and increasing planetary cooling. The Southern Ocean is located around Antarctica and serves as a staging ground for the world’s oceans, influencing their circulation.

Dec 6, 2024

Prof. Carlos Duarte, Ph.D. — Executive Director, Coral Research & Development Accelerator Platform

Posted by in categories: bioengineering, biological, climatology, sustainability

Professor Carlos Duarte, Ph.D. is Distinguished Professor, Marine Science, and Executive Director, Coral Research \& Development Accelerator Platform (CORDAP — https://cordap.org/), Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology (KAUST — https://www.kaust.edu.sa/en/study/fac…), in Saudi Arabia, as well as Chief Scientist of Oceans2050, OceanUS, and E1Series.

Prior to these roles Professor Duarte was Research Professor with the Spanish National Research Council (CSIC) and Director of the Oceans Institute at The University of Western Australia. He also holds honorary positions at the Arctic Research Center in Aarhus University, Denmark and the Oceans Institute at The University of Western Australia.

Continue reading “Prof. Carlos Duarte, Ph.D. — Executive Director, Coral Research & Development Accelerator Platform” »

Dec 6, 2024

3D scans of giant hailstones reveal surprising discoveries that could help predict future storms

Posted by in categories: climatology, particle physics

Hailstones are formed during thunderstorms, when raindrops are propelled into very cold parts of a cloud, where they freeze. Once the particles are heavy enough, gravity pulls them back towards Earth. As they plummet, they grow into hailstones, which can cause injury to people and significant damage to homes and cars.

Scientists have been studying how hailstones grow since the 1960s but doing so meant breaking them in the process. To better understand the anatomy and growth of hailstones, researchers in Catalonia have used computed tomography (CT) scans to examine the giant hailstones that hit the north-east of the Iberian Peninsula during an exceptionally strong thunderstorm in the summer of 2022.

“We show that the CT scanning technique enables the observation of the internal structure of the hailstones without breaking the samples,” said Carme Farnell Barqué, a researcher at the Meteorological Service of Catalonia and lead author of the study published in Frontiers in Environmental Science.

Dec 6, 2024

Tsunami threat ends for Northern California, Oregon coasts after major 7.0 earthquake

Posted by in category: climatology

The National Weather Service allowed the Tsunami Warning to expire on Thursday morning after a major magnitude 7.0 earthquake struck off the coast of Ferndale, California. The quake was the strongest for the area since 2005.

SAN FRANCISCO – A magnitude 7.0 earthquake off the coast of Northern California prompted a rare tsunami warning for coastal areas near the California–Oregon state line, including San Francisco Bay.

A powerful 7.0 earthquake was recorded around 10:44 a.m. PT about 60 miles offshore of Ferndale, California, according to the U.S. Geological Survey.

Dec 6, 2024

A rising danger in the Arctic

Posted by in categories: biological, climatology, sustainability

As climate change melts permafrost, microbes will emerge. The world isn’t paying enough attention to the potential threat they pose.

Dec 5, 2024

A man scouring Google Earth found a mysterious scar in the Australian outback — and now scientists know what caused it

Posted by in category: climatology

The find intrigued scientists, including my colleagues and I. Upon closer investigation, we realised the scar was created by a ferocious tornado that no-one knew had occurred. We outline the findings in new research published today.

Tornadoes are a known threat in the United States and elsewhere. But they also happen in Australia.

Without the power of technology, this remarkable example of nature’s ferocity would have gone unnoticed. It’s important to study the tornado’s aftermath to help us predict and prepare for the next big twister.

Dec 3, 2024

Venus Never Had Oceans: New Study Rules Out Past Habitability

Posted by in categories: climatology, computing, space

Did Venus have oceans in its ancient past and could they have supported life as we know it, or even as we don’t know it? This is what a recent study published in Nature Astronomy hopes to address as a team of researchers from the University of Cambridge investigated the climate history of Venus and whether it possessed liquid water oceans on its surface deep in its past. This study holds the potential to help scientists better understand past conditions on planetary bodies throughout the solar system and what this could mean for finding evidence of ancient life beyond Earth.

For the study, the researchers used computer models to estimate how fast the Venusian atmosphere is losing water, carbon dioxide, and carbonyl sulphide molecules, all of which are required to be replenished by volcanic gases so atmospheric stability can be maintained. Therefore, by studying how fast these molecules are leaving the atmosphere, scientists can estimate the amount of present and past volcanic activity on Venus, thus determining if Venus once had oceans of liquid water that might have supported life as we know it. In the end, the researchers determined that Venus is far too dry to have ever possessed bodies of liquid oceans on its surface.

“We won’t know for sure whether Venus can or did support life until we send probes at the end of this decade,” said Tereza Constantinou, who is a PhD student at Cambridge’s Institute of Astronomy and lead author of the study. “But given it likely never had oceans, it is hard to imagine Venus ever having supported Earth-like life, which requires liquid water.”

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