Tag Archives: dioxide

Arctic Warming: Some Effects May Remain Irreversible Despite Reduced Carbon Dioxide Levels

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Birth near the Heisinger Glacier in Greenland

Glacier meets sea at Dixon Fjord in Greenland

Jane Rix/Alamy

Even if atmospheric carbon dioxide returns to pre-industrial levels and the global temperature decreases, the Arctic is projected to warm by approximately 1.5 degrees Celsius.

It is also expected that the region will receive about 0.1 millimeter of extra precipitation daily, regardless of the implementation of large-scale carbon dioxide removal (CDR) strategies.

“These findings emphasize the irreversible aspect of climate change in the Arctic, even with aggressive CDR efforts,” the researchers stated in their publication.

Current atmospheric CO2 levels are roughly 1.5 times greater than pre-industrial levels, resulting in a warming of 3°C or more. A study published in March revealed that even if extra carbon dioxide were removed, sea ice coverage would still average 1 million square kilometers less.

In a new investigation, researchers led by Xiaodong from the Institute of Atmospheric Physics in Beijing utilized 11 distinct climate models to assess the likelihood of continued Arctic warming. The findings also indicate that precipitation is likely to increase, according to Michael Meredith from the British Antarctic Survey, who was not part of the study.

The primary reason for this persistent warming is that oceans, which have absorbed 90% of the heat from global warming, will continue to warm the Arctic for centuries, even when atmospheric temperatures decrease. This situation will likely be amplified by feedback mechanisms, such as diminishing sea ice, which causes the open ocean to raise air temperatures.

“Even if the atmosphere continues to cool, the oceans will lag behind and counteract this trend,” Meredith remarked.

Many experts express skepticism about whether CDR methods, including tree planting and mechanical CO2 extraction, can significantly lower atmospheric CO2 levels due to the financial and energy challenges, a process that could take thousands of years.

Dong et al. examined a theoretical scenario where atmospheric CO2 levels quadrupled from pre-industrial amounts over 140 years, decreased for another 140 years, and then remained at pre-industrial levels for 60 additional years.

The study also reviewed two potential real-world climate scenarios: one in which humanity immediately reduces emissions, and another where emissions remain high but CDR efforts ramp up quickly starting in 2070. In these scenarios, similar to the theoretical model, the Arctic was found to be approximately 1.5 degrees Celsius warmer with precipitation increasing by an additional 0.1 mm per day by 2100.

The models forecast a decrease in temperatures and precipitation in the waters just south of Greenland and Iceland, contrasting with other regions in the Far North. This suggests a decline in the Atlantic Meridional Overturning Circulation (AMOC), which is responsible for transporting warm surface water from the tropics to this area. This current is already weakening as global ocean temperatures rise, a trend that might lead to colder winters in Europe over time.

Climate-related effects, such as thawing permafrost and melting of the Greenland ice sheet, are likely to persist but were not included in this study’s models.

“The Greenland ice sheet is expected to behave as observed, meaning it will continue to lose mass and contribute to sea level rise,” stated Mark Selles from the US National Snow and Ice Data Center.

While the study indicates that the Arctic will remain warm for centuries, it is anticipated that it will eventually cool over the course of many more centuries or even millennia.

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  • climate change/
  • arctic

Source: www.newscientist.com

Researchers Discover That “Linear Dune Canyons” on Mars Were Formed by Sliding Carbon Dioxide Ice Blocks

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Parallel channels known as linear dune canyons can be observed within some of Mars’ dunes. Contrary to what their name suggests, these canyons are frequently quite winding. It was previously believed that these landforms were created through debris flow processes influenced by liquid water. However, recent satellite imagery has revealed that they are active during the local spring due to processes involving carbon dioxide ice. During the Martian winter, ice accumulates on the dunes, breaking off at the top as temperatures rise in early spring. In new experiments conducted in the Mars Chamber, planetary researchers from Utrecht University, the University of Le Mans, the University of Nantes, the Grenoble Institute of Astrophysics, and the Open University have demonstrated that linear dune canyons form when blocks of carbon dioxide and ice slide or submerge into the sandy slopes of dunes, or shift downwards with considerable force, draining the nearby sand. This drilling action is triggered by a powerful gas flow generated by the sublimation of carbon dioxide ice, as it transitions into carbon dioxide gas. The movement of sliding carbon dioxide ice blocks contributes to the formation of shallow channels, while the excavation of carbon dioxide ice results in the development of deep, winding channels in Martian dunes.

Two examples of Martian dunes with linear dune gullies: (a) linear dune gullies in the dune field of Gall Crater; (b) A linear dune canyon in the dune field of an unnamed crater in the center of the Hellas Plain. Image credit: Roelofs et al., doi:10.1029/2024GL112860.

Linear dune canyons are remarkable and enigmatic formations located in the mid-latitude sand dune regions of Mars.

Despite their designation, these parallel and often meandering waterways, characterized by sharp bends, limited source areas, distinct banks, and hole-like channel terminations, have no equivalent on Earth.

They differ significantly from the conventional canyon topography found on steep slopes both on Mars and Earth, which typically features erosional alcoves, channels, and sedimentary aprons that are often larger than linear dune canyons.

“In our simulations, we observed how high gas pressures cause the sand to shift in all directions around the blocks,” stated Loneke Roelofs, a researcher at Utrecht University and lead author of the study.

“Consequently, the blocks become lodged into the slope and get trapped within cavities, surrounded by small ridges of settled sand.”

“However, the sublimation process persists, leading to continued sand displacement in all directions.”

“This phenomenon drives the block to gradually descend, resulting in a long, deep canyon flanked by small sand ridges on either side.”

“This is precisely the kind of canyon we find on Mars.”

In their research, Dr. Roelofs and colleagues merged laboratory experiments that let blocks of carbon dioxide and ice slide down sandy slopes under Martian atmospheric pressure with observations of the linear dune canyons located within the Russell Crater Giant Dunes.

“We experimented by simulating dune slopes of varying steepness.”

“We released chunks of carbon dioxide ice down a slope and observed the outcomes.”

“Once we discovered an appropriate slope, we began to see significant effects. The carbon dioxide ice chunks started to penetrate the slope and move downwards, resembling burrowing moles or dune sandworms. It was quite an unusual sight.”

“But how exactly do these ice blocks originate? They form in the desert dunes located in the midlands of Mars’ southern hemisphere.”

“During winter, a layer of carbon dioxide ice develops across the entire surface of the dunes, reaching thicknesses of up to 70 cm. As spring arrives, this ice begins to warm and sublimate.”

“The last remnants of the ice persist on the shaded side of the dune’s summit, where blocks will break off once temperatures rise sufficiently.”

“When a block reaches the base of the slope and halts its movement, sublimation continues until all carbon dioxide evaporates, leaving behind a cavity filled with sand at the dune’s base.”

This study was published in the October 8th issue of Geophysical Research Letters.

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Loneke Roelofs et al. 2025. Particle transport driven by explosive sublimation causes blocks of CO2 to slide and burrow, forming winding “linear dune valleys” in Martian dunes. Geophysical Research Letters 52 (19): e2024GL112860; doi: 10.1029/2024GL112860

Source: www.sci.news

CO2 Chronicles: A Compelling New Book Urging Action on Carbon Dioxide Narratives

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Florian Gaertner/Photothek via Getty Images

A Shared Narrative2: It’s Everything
Peter Brunnen (Allen Lane)

Carbon dioxide influences our perceptions. Emissions from power stations, vehicle exhausts, and the burning of natural habitats contribute to our planet’s increasing warmth. These realities are compelling lawmakers and decision-makers to confront climate change earnestly.

CO2, comprised of one carbon atom bonded to two oxygen atoms, is essential for life on Earth. However, the escalating levels of CO2 are now exacerbating global warming and threatening life itself. This contradiction is a central theme explored by Peter Brannen in A Shared Narrative2: Planetary Experiments, a meticulously researched and persuasive read.

Brunnen, a science journalist known for his previous work on the extinction events of Earth’s history, now tackles a monumental task: elucidating the carbon cycle (CO2) and its implications, a topic often overlooked in educational settings, while revealing the fascinating stories that span our planet’s history.

It’s easy to overlook the periodic table. It’s also simple to disengage readers with mundane discussions about air movement. Yet, Brunnen artfully revitalizes this narrative, emphasizing CO2‘s significance for all living beings. He vividly depicts events from millions of years ago, like the “Snowball Earth,” and the 56 million-year phase when the planet was “held captive by ice,” compelling readers to visualize these extraordinary, yet unimaginable, realities.

We learn in school that wood consists of carbon. However, Brunnen expands on this, discussing elements such as “mushroom psychedelics, pepper spices, and coffee caffeine.” While many authors might stop there, Brunnen elaborates: Carbon exists in “your eyeball, bougainvillea petals… blue whale baleen, fat, and brain… your tub scum, lion’s mane.”

These rhetorical flourishes may risk overwhelming the reader, yet Brunnen delivers a cogent and artful case. The highest praise I can offer this book is that it frequently inspires a childlike awe—a feeling we often take for granted, much like the subjects that permeate our daily lives.

However, this isn’t merely a children’s book. In addition to the planet and its inhabitants, Brunnen draws on historical insights to urge immediate action, advocating for a transition away from fossil fuels.

His analysis draws careful parallels between our current CO2 emissions and those that precipitated the last mass extinction, a theme he reiterates throughout his work, articulating a growing urgency as he approaches his conclusions. “We can’t escape this dilemma,” he asserts. He critiques the notion of carbon capture and storage as merely a stopgap, arguing that it serves only to mitigate our current lifestyle without addressing the root cause. “In summary, we’re in deep trouble,” he writes.

Assuming no actions are taken and trends continue, he warns that companies may only awaken to their environmental impact after it’s too late, likening such reactions to misguided efforts.

This prevailing attitude, he observes, is common in “some climate circles,” and demands correction. “Sticking to the current path will undoubtedly lead to severe climate disaster, and regardless of how successful changes may be, we must explore all options to avoid catastrophe,” he states.

Decision-makers aiming to steer society away from fossil fuels would benefit immensely from engaging with this book.

Chris Stokell Walker is a technology writer based in Newcastle, UK

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Source: www.newscientist.com

Scientists Uncover Mesozoic Carbon Dioxide Levels and Photosynthesis Through Dinosaur Tooth Enamel Analysis

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During the Mesozoic era, from 252 to 66 million years ago, analyses of the oxygen isotope composition in dinosaur teeth revealed that the atmosphere contained significantly more carbon dioxide than it does today, with global plant photosynthesis levels roughly double those of the present.

Fossil teeth of Camarasaurus from the Morrison Formation in the US. Image credit: sauriermuseum aathal.

A study conducted by Göttingen University and researcher Dr. Dingsu Feng examined the dental enamel of dinosaurs that roamed North America, Africa, and Europe during the Late Jurassic and Late Cretaceous periods.

“Enamel is one of the most stable biological materials,” they explained.

“It captures different oxygen isotopes based on the air dinosaurs inhaled with each breath.”

“The isotope ratios of oxygen reflect fluctuations in atmospheric carbon dioxide and plant photosynthesis.”

“This connection allows us to infer insights about the climate and vegetation of the dinosaur era.”

“During the late Jurassic, about 150 million years ago, the air contained four times more carbon dioxide than before industrialization, prior to significant human emissions of greenhouse gases.”

“In the late Cretaceous, around 730 to 66 million years ago, carbon dioxide levels were three times higher than today.”

Teeth from two dinosaur species, the Tyrannosaurus Rex and Kaatedocus siberi, showed an exceptionally unique oxygen isotope composition.

This phenomenon is indicative of carbon dioxide spikes linked to major geological events like volcanic eruptions—such as the massive eruption of the Deccan Traps in India at the close of the Cretaceous period.

The heightened photosynthetic activity of plants at that time on both land and water is likely associated with elevated carbon dioxide levels and higher average annual temperatures.

This research marks a milestone in paleoclimatology. Historically, soil and marine proxy carbonates have served as the primary tools for reconstructing past climates.

Marine proxies, which are indicators of sediment fossils and chemical signatures, help scientists comprehend ancient marine environmental conditions, yet these methods often involve uncertainties.

“Our approach offers a fresh perspective on the planet’s history,” Dr. Fenn remarked.

“It paves the way to use fossilized tooth enamel for probing the composition of Earth’s atmosphere and plant productivity during that era.”

“Understanding these factors is crucial for grasping long-term climate dynamics.”

“Dinosaurs may well become new climate scientists, as their teeth have recorded climate data for over 150 million years. At last, we have received their message.”

Study published on August 4, 2025, in Proceedings of the National Academy of Sciences.

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Dingsu Feng et al. 2025. Mesozoic Atmospheric CO2 Concentrations reconstructed from the enamel of dinosaur teeth. PNAS 122 (33): E2504324122; doi: 10.1073/pnas.2504324122

Source: www.sci.news

Fig Trees Could Help Combat Climate Change by Transforming Carbon Dioxide into Stone

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Fig trees may excel at reducing carbon dioxide levels in the atmosphere

Raimund Link/Mauritius Images Gmbh/Alamy

Certain fig trees have the ability to transform significant quantities of carbon dioxide into solid forms, allowing carbon to remain in the soil even after the tree has perished. This indicates that fig trees used for timber or fruit cultivation could offer additional environmental benefits through this carbon sequestration process.

While all trees generally utilize carbon dioxide from the air, most of it is converted into structural molecules such as cellulose. However, some tree species also synthesize a crystalline substance known as calcium oxalate, and the bacteria within the trees and soil can convert it to calcium carbonate, a primary component of rocks like limestone and chalk.

Mineral carbon can remain in the soil significantly longer than organic matter derived from wood. Trees that store carbon in this manner include iron syrup (Milisia Excelsa), which is found in tropical Africa and is valued for its wood yet does not yield edible fruit.

Recently, Mike Rory from the University of Zurich and his team discovered that three fig species indigenous to Samburu County, Kenya, can also produce calcium carbonate through their own processes.

“Most trees generate calcium carbonate within the soil,” Laurie explains. “We [also] observe that high concentrations can transform the entire root structure into calcium carbonate in the soil, which is a remarkable finding.”

The research team initially identified the calcium carbonate-generating fig species by using a weak hydrochloric acid solution to detect its release from calcium carbonate. Subsequently, they could confirm the presence of calcium carbonate in the surrounding soil and analyze wood samples to pinpoint where calcium carbonate was being generated.

“What genuinely astonished me was how deep I was digging for [calcium carbonate],” Laurie remarked, as he presented his findings at the Goldschmidt conference in Prague, Czech Republic, this week.

Further investigations are needed to estimate the total carbon storage of these trees, the resilience of water in various climates, and the water requirement. Nevertheless, if fig trees can be integrated into future planting initiatives, they could serve as both a source of nourishment and a carbon sink, according to Laurie.

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Source: www.newscientist.com

New Record High of Atmospheric Carbon Dioxide Levels Recorded at Monitoring Station

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Hawaii’s Mauna Loa Observatory has been recording atmospheric carbon dioxide concentrations since 1958.

Fred Espenak/Science Photo Library

Atmospheric carbon dioxide levels measured by Hawaii’s Mauna Loa Observatory weather station increased by 3.58 parts per million in 2024, the largest increase since records began in 1958.

‘We’re still going in the wrong direction,’ climate scientists say Richard Betts At the Met Office, the UK’s weather bureau.

Part of this record increase is due to carbon dioxide emissions from human activities such as fossil fuel burning and deforestation, which reached an all-time high in 2024. Added to this were numerous wildfires caused by record global warming driven by climate change. Long-term warming plus El Niño weather patterns.

Betts predicted that atmospheric carbon dioxide concentrations measured at Mauna Loa would rise by 2.26 parts per million (ppm) this year, with a margin of error of 0.56 ppm either way. This is significantly lower than the 2024 record, but it would exceed the last possible pathway to limiting the rise in global surface temperatures to 1.5°C above pre-industrial levels.

“You can think of this as another nail in the 1.5°C coffin,” Betts says. “Now that’s highly unlikely.”

Atmospheric carbon dioxide concentration is the most important indicator when it comes to climate change, as increasing atmospheric carbon dioxide concentration is the main driver of short- and long-term warming. The first continuous measurements of CO2 levels were taken at Mauna Loa.

“Because this station has the longest observation record and is located far from major anthropogenic and natural sources of CO2 emissions and sinks, it is often used to represent changes in global CO2 concentrations. It will be done.” Richard Engelen At the EU’s Copernicus Atmospheric Monitoring Service.

However, observations from satellites have made it possible to directly measure the global average atmospheric carbon dioxide concentration. According to CAMS, it rose by 2.9 ppm in 2024. Although this is not a record, it is one of the largest increases since satellite observations began.

“The reasons for this large increase require further investigation, but are likely a combination of a recovery in emissions in much of the world after the coronavirus pandemic and interannual fluctuations in natural carbon sinks.” says Engelen. Carbon sinks refer to marine and terrestrial ecosystems that absorb about half of the carbon dioxide emitted by humans.

It has long been predicted that as the Earth warms, this excess CO2 will become less absorbed. “The concern is whether this is the beginning of that,” Betts said. “We don’t know.”

At Mauna Loa, carbon dioxide increases will be higher than global average levels in 2024 due to the large number of wildfires in the Northern Hemisphere, Betts said. CO2 plumes from sources such as wildfires take time to mix evenly into the world’s atmosphere. “Fire emissions in the Northern Hemisphere were particularly high last year,” he says.

Although it is now certain that global warming will exceed the 1.5°C threshold, Betts believes it is still the right goal to set that goal. “The Paris Agreement is carefully worded to seek to limit global warming to 1.5%. We recognized from the beginning that this would be difficult,” he says. “The idea was to set this stretch goal to motivate action, and I actually think it was successful. It galvanized action.”

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Source: www.newscientist.com

Mars’ polar regions covered in white due to carbon dioxide ice

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Planetary scientists using ESA's Mars Express spacecraft's high-resolution stereo camera have captured stunning images of Earth's mysterious landscapes. Australe Scopri Region in the southern hemisphere of the red planet.

Frozen landscape of the Australe Skopli region on Mars' south pole. Image credit: ESA / DLR / FU Berlin.

“Here, a layer of carbon dioxide ice and dust envelops the site, turning Mars white,” ESA researchers said in a statement.

“The contrasting light and dark layers are especially striking on the exposed surfaces of hills and valleys.”

“They track the seasonal polar layered deposits characteristic of the region, which form when layers of ice freeze and trap varying amounts of dust within them. It is something that will be done.”

“It's probably better to take a sled ride, but either way, dress warmly, because it's -125 degrees Celsius (-193 Fahrenheit) outside so it's cold,” they added.

“Skiers and sledders on Mars will have to slalom around potentially hundreds of dust jets.”

“That's because ski season is almost over and it's starting to look like spring, or even summer. This image was taken on June 16, 2022, near the Antarctic summer solstice.”

If you zoom in on the image above, you can see numerous dark spots where the ice has already sublimated. This is a sure sign that the sun's warming rays have been hitting the area for some time.

“When sunlight hits the translucent upper layer of carbon dioxide ice, it warms the underlying surface,” the scientists explained.

“The ice at the bottom of the layer begins to sublimate, forming pockets of trapped gas.”

“As the pressure increases, the overlying ice suddenly cracks, causing gas to burst out from the surface.”

“These gas fountains carry black dust from below, which falls to the surface in a fan-shaped pattern depending on the prevailing wind direction.”

“Fan lengths range from tens of meters to hundreds of meters.”

“If you look more closely, it often appears that the fans follow the boundaries between polar layered deposits.”

“Perhaps these boundaries represent zones of weakness, from which escaping dust-laden jets can more easily break through the ice layer.”

“We may have missed the chance to create 'Frosty the Snowman,' but it's still a wonderful time of year on Mars.”

Source: www.sci.news

Scientists uncover innovative method to transform carbon dioxide into methane

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A new class of atomically dispersed nickel catalysts directly converts trapped carbon dioxide (CO)2 to methane (CH4), according to Tomaz Neves García, Ph.D., a postdoctoral researcher at The Ohio State University, and colleagues.

Direct electrochemical reduction of carbon dioxide scavenging species, namely carbamates and (bi)carbonates, may be promising for carbon dioxide capture and conversion from point sources. Image credit: Neves Garcia others., doi: 10.1021/jacs.4c09744.

Carbon dioxide is the greenhouse gas responsible for most of global warming and is produced by power plants, factories, and various forms of transportation.

Typical carbon capture systems, aimed at reducing the presence of carbon dioxide in the atmosphere, reduce carbon dioxide emissions by separating carbon dioxide from other gases and converting it into useful products. .

However, the operation of these systems requires large amounts of energy, making this process difficult to implement on an industrial scale.

“Now we have found a way to save much of this precious energy by using a special nickel-based catalyst to convert the captured carbon dioxide directly into methane,” said Dr. Neves Garcia.

By using nickel atoms placed on a charged surface, Dr. Neves-Garcia and his co-authors were able to convert carbamates, a scavenging form of carbon dioxide, directly into methane.

They discovered that nickel atoms, an inexpensive and widely available catalyst, were very good at this transformation.

“We are producing high-energy fuels from low-energy molecules,” said Dr. Neves Garcia.

“What's so interesting about this is that while other companies are capturing, capturing and converting carbon in stages, we're saving energy by doing these steps simultaneously. is.”

Most importantly, streamlining the carbon capture process will help scientists reshape what they know about the carbon cycle and inform more complex strategies for faster and more efficient climate mitigation technologies. This is an important step to establish.

“We need to focus on minimizing the energy spent on carbon capture and conversion as much as possible,” said Dr. Neves García.

“So instead of performing all the capture and conversion steps separately, we can integrate it into one step and avoid wasted energy processes.”

“Many carbon capture methods are still in their infancy, but this is a promising field as researchers from a variety of disciplines are working on improvements.”

“Using renewable electricity to convert carbon dioxide into fuel has the potential to end the carbon cycle.”

“For example, when methane is burned to produce energy, it emits carbon dioxide, which can be captured and converted back into methane to support a continuous energy production cycle without adding to the planet's global warming burden. It may be possible.”

The study also represents the first time researchers have discovered that carbamates can be converted to methane using electrochemistry.

Many attempts have been made to convert the captured carbon dioxide into useful products, but so far most researchers have only shown the ability to produce carbon monoxide.

“Methane can be a very interesting product, but most importantly it opens the way to developing further processes to convert the captured carbon dioxide into other products” Neves Garcia said the doctor.

of the team work Published in Journal of the American Chemical Society.

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tomas neves garcia others. 2024. Integrated capture and conversion of carbon dioxide to methane with amines over single-atom nickel catalysts. J.Am. Chemistry. society 146 (46): 31633-31646;doi: 10.1021/jacs.4c09744

Source: www.sci.news

Webb discovers carbon dioxide and hydrogen peroxide found on Charon’s surface

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Using data from near infrared spectrometer (NIRSpec) Astronomers aboard the NASA/ESA/CSA James Webb Space Telescope have detected carbon dioxide (CO2) and hydrogen peroxide (H2O2) The frozen surface of Pluto’s moon Charon. Their findings provide new insights into Charon’s chemical processes and surface composition, and could help understand the origin and evolution of icy objects in the outer solar system.

Protopapa others. Using Webb telescope observations (white), we detected spectral signatures of carbon dioxide and hydrogen peroxide on Charon. This extends the wavelength range of previous New Horizons flyby measurements (pink). Image credit: S. Protopapa / SwRI / NASA / ESA / CSA / STScI / JHUAPL.

Beyond Neptune, there is a collection of fascinating small objects known as trans-solar objects (TNOs) that orbit around the Sun.

These objects act as time capsules, giving planetary scientists a glimpse of the early solar system.

“Charon is unique in that it is the only medium-sized TNO for which geological maps are available, 500 km to 1700 km in diameter, thanks to measurements returned by NASA’s New Horizons mission,” said Sylvia of the Southwest Research Institute. Dr. Protopapa said. And her colleagues.

“Unlike larger TNOs (such as Pluto, Eris, and Makemake), Charon’s surface is not covered by supervolatile ices such as methane, with possible exceptions toward the poles.”

“As a result, Charon serves as an excellent candidate to gain valuable insights into processes such as differentiation, radiation exposure, and cratering within the Kuiper belt.”

“Although Charon has been extensively studied since its discovery in 1978, previous spectral data were limited to wavelengths below 2.5 μm, leaving gaps in our understanding of its surface composition. “

“The presence of water ice, ammonia-containing species, and organic compounds had been previously noted, but the spectral range used was insufficient to detect other compounds.”

Protopapa and his co-authors used Webb’s near-infrared spectrometer to observe Charon at wavelengths between 1.0 and 5.2 μm.

They conducted four observations at different longitudes, and together with laboratory experiments and spectral modeling, they confirmed the presence of crystalline water ice and ammonia, and also identified carbon dioxide and hydrogen peroxide.

“Thanks to Webb’s advanced observational capabilities, our team is able to explore the light scattered from Charon’s surface at longer wavelengths than previously possible, allowing us to explore the complexities of this fascinating object. “We were able to further deepen our understanding of human health,” said Dr. Ian Wong, a scientist at the institute. Space Telescope Science Institute.

The presence of hydrogen peroxide suggests active processing of water ice by irradiation and light at Charon’s surface, while carbon dioxide is present since its formation and is due to subsurface carbon dioxide exposed to the surface by impact events. It is thought to originate from carbon reservoirs.

The detection of carbon dioxide and hydrogen peroxide on Charon represents a step forward in planetary science and provides insight into the moon’s surface chemistry.

This study could lay the foundation for future studies to investigate the dynamics of extrasolar objects, their surface compositions, and the effects of solar radiation.

“Our preferred interpretation is that the upper layer of carbon dioxide originated from within and was exposed to the surface through cratering events,” Dr Protopapa said.

“Carbon dioxide is known to exist in the region of the protoplanetary disk where the Pluto system formed.”

“New insights are made possible by the synergy of Webb observations, spectral modeling, and laboratory experiments, and may be applicable to similar medium-sized objects beyond Neptune.”

of result Posted in today’s diary nature communications.

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S. Protopapa others. 2024. Detection of carbon dioxide and hydrogen peroxide on Charon’s layered surface using JWST. Nat Commune 15, 8247; doi: 10.1038/s41467-024-51826-4

Source: www.sci.news

Scientists claim that New building biomaterial can absorb carbon dioxide from the atmosphere

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The new biomaterial, called C-ELM, incorporates live cyanobacteria in translucent panels that can be attached to the interior walls of buildings. The microbes embedded in these panels grow through photosynthesis, absorbing carbon dioxide from the air and attaching it to calcium through a biomineralization process to produce calcium carbonate, which traps carbon.

C-ELM is Camptonema Animal Cyanobacteria extracting carbon dioxide from the atmosphere. Image courtesy of Prantar Tamuli.

One kilogram of C-ELM (cyanobacterial engineered biomaterial) can capture and sequester up to 350 grams of carbon dioxide, while the same amount of traditional concrete releases as much as 500 grams of carbon dioxide.

A 150-square-metre wall covered with these C-ELM panels will trap around one tonne of carbon dioxide.

“By developing C-ELM materials, my goal is to transform the construction of future human settlements from one of the largest carbon emitting activities into one of the largest carbon sequestration activities,” said Planter Tamri, a graduate student at University College London.

“I was inspired to develop this material through my study of stromatolites – natural stone structures that formed over millions of years from sediments trapped by algal mats, the oldest living organisms on Earth.”

Tamri et al. Camptonema AnimalA type of photosynthetic cyanobacteria, it grows in long filamentous structures that help attach the microbes to the surrounding material within the panel.

The calcium carbonate produced by the cyanobacteria helps strengthen the panels.

The panels themselves are designed to provide a variety of aesthetic and structural benefits to buildings.

It is lightweight, sound absorbing, translucent enough to let light through, and has insulating properties, making buildings more energy efficient.

The first such panel was unveiled at an exhibition in the “Bioscope” pavilion at St. Andrews Botanic Garden in Scotland.

Designed by design collective Studio Biocene, the exhibit showcased low-carbon, low-impact building methods that mimic the natural environment.

“The potential of this type of biomaterial is enormous,” said Professor Marcos Cruz, from University College London.

“If mass-produced and widely adopted, it has the potential to dramatically reduce the construction industry's carbon footprint.”

“We hope to scale up the production of this C-ELM and further optimize its performance to make it suitable for use on construction sites.”

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This article is a version of a press release provided by University College London.

Source: www.sci.news

UK reaches Sulfer dioxide from Icelandic volcanic eruption

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Lava erupts from a fissure near Grindavik, Iceland, on March 20th.

Associated Press/Alamy Stock Photo

A recent eruption on the Reykjanes Peninsula in Iceland released a huge plume of sulfur dioxide (SO2) currently floating around Europe. Fortunately, no significant weather or health impacts are expected.

yes2 On March 20 in the EU, the plume moved across Ireland and the United Kingdom towards Scandinavia. Copernicus atmospheric monitoring service I said it today. It is scheduled to arrive in the Baltic states, Poland and Russia on Friday.

A person working at the Blue Lagoon Resort on the Reykjanes Peninsula, Iceland was hospitalized March 20, after being exposed to high levels of SO.2 gas. However, the plumes moving over Europe are far above the ground and do not affect the air quality below.

Say, “The plume is at a higher altitude.” Mark Purrington At Copernicus Atmospheric Monitoring Service.

Last November, a gigantic fissure, 15 kilometers long and several kilometers deep, formed under part of the Reykjanes Peninsula. Magma that had been accumulating deeper was poured into it at the fastest rate ever recorded.

On December 18, lava began erupting along part of the fissure. So far it has erupted four times, and the most recent and largest eruption began on March 17th.

“SO plume”2 All of Europe was created at an early stage [of the latest eruption]” Freistein Sigmundson At the University of Iceland in Reykjavik.

Freistein said the eruption continued as of the afternoon of March 21, although the flow slowed from its initial stages. “This eruption is different from previous ones,” he says. “It's longer than last time.”

Some volcanic eruptions release enough SO2 Although it has the potential to affect the global climate, the Icelandic eruption is not on this scale. Parrington said the plume's duration is too short to affect the weather.

Unlike the 2010 eruption of Eyjafjallajokull, which disrupted air traffic over Europe for about a week, the Reykjanes eruption is of a different type and is not expected to produce large amounts of volcanic ash.

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Source: www.newscientist.com

Study finds that low carbon dioxide emissions from volcanoes may have caused the Sturtian ‘Snowball Earth’ ice age.

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of Sturtian “Snowball Earth” Ice Age (717 million to 661 million years ago) is considered the most extreme icehouse period in Earth’s history. In a new study, geologists from the University of Sydney and the University of Adelaide used plate tectonics modeling to identify the most likely cause of the Staats Ice Age.

Artist’s impression of “Snowball Earth”. Image credit: Oleg Kuznetsov, http://3depix.com / CC BY-SA 4.0.

“Imagine if the Earth almost completely froze over, which is exactly what happened about 700 million years ago,” said lead author Dr. Adriana Dutkiewicz, a researcher at the University of Sydney. .

“The Earth was covered in ice from the poles to the equator, and temperatures plummeted. But what caused this to happen is an open question.”

“We think we have now solved the mystery. Historically, volcanic carbon dioxide emissions have been low, driven by the weathering of large volcanic rock mountains in what is now Canada. It’s a process that absorbs carbon dioxide.”

Named after Charles Sturt, a 19th-century European colonial explorer of central Australia, the Sturtsian Ice Age spanned 717 million to 660 million years, long before dinosaurs and complex plants existed on land. It continued until ten thousand years ago.

“There are many possible causes for the trigger and end of this extreme ice age, but the most mysterious one is why it lasted 57 million years. It’s hard for humans to imagine,” Dr. Dutkiewicz said.

Dr. Dutkiewicz and his colleagues used a plate tectonics model that simultaneously shows the evolution of continents and ocean basins after the breakup of the ancient supercontinent Rodina.

They connected it to a computer model that calculates the outgassing of carbon dioxide from submarine volcanoes along mid-ocean ridges, where plates diverge and new oceanic crust is born.

They soon realized that the beginning of the Starch Ice Age correlated precisely with the lowest ever levels of volcanic carbon dioxide emissions.

Additionally, carbon dioxide flux remained relatively low throughout the ice age.

“At that time, there were no multicellular animals or land plants on Earth,” Dr. Dutkiewicz said.

“Greenhouse gas concentrations in the atmosphere were determined almost entirely by carbon dioxide emitted by volcanoes and by the weathering processes of silicate rocks that consume carbon dioxide.”

“At that time, geology ruled the climate,” said co-author Professor Dietmar Müller, a researcher at the University of Sydney.

“We think the Staats Ice Age began with a double whammy: plate tectonics realigned to minimize volcanic degassing, while at the same time Canada’s continental volcanic belt began to erode, removing carbon dioxide from the atmosphere. Consumed.”

“As a result, atmospheric carbon dioxide has fallen to levels that could begin an ice age. This is estimated to be less than 200 parts per million, less than half of today’s levels.”

The team’s current research raises interesting questions about the long-term future of the planet.

Recent theories suggest that over the next 250 million years, Earth will evolve toward Pangea Ultima, a supercontinent hot enough to wipe out mammals.

However, the Earth is currently on a trajectory where volcanic carbon dioxide emissions decrease as continental collisions increase and plate velocities decrease.

So perhaps Pangea Ultima will snowball again.

“Whatever the future holds, it is important to remember that geological climate changes of the type studied here occur very slowly,” Dr. Dutkiewicz said.

“According to NASA, human-induced climate change is occurring 10 times faster than ever before.”

of study appear in the diary geology.

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Adriana Dutkiewicz other. The period of the Sturtian “Snowball Earth” ice age is associated with unusually low gas emissions at mid-ocean ridges. geology, published online on February 7, 2024. doi: 10.1130/G51669.1

Source: www.sci.news