Energy-related emissions of carbon dioxide hit a record high in 2023, the International Energy Agency (IEA) said in a report on Friday. The IEA analysis showed that it rose by 410 million tonnes, or 1.1%, in 2023 to 37.4 billion tonnes. From a report: "Far from falling rapidly -- as is required to meet the global climate goals set out in the Paris Agreement -- CO2 emissions reached a new record high," the IEA said. However, the Paris-based watchdog also found clean energy including wind and solar energy, as well as electric vehicles, had helped to offset the impact of the continued burning of coal and oil growth, which was 1.3% in 2022.

The reopening of China's economy after the COVID-19 pandemic and a recovery in the aviation sector contributed to an overall rise, the IEA said in its report. Severe droughts last year in China, the United States, India, and other countries hampered hydropower production. It accounted for around 40% of the rise in emissions or 170 million tonnes of CO2. "Without this effect, emissions from the global electricity sector would have fallen in 2023," the IEA said. Carbon dioxide emissions from coal accounted for the remaining increase. The IEA analysis showed that 2023 was the first year in which at least half of electricity generation in industrialized countries came from low-emission sources such as renewable energy and nuclear power. Energy-related emissions in the United States fell by 4.1%, and 9% in the European Union, driven by a surge in renewable power generation.

Astronomers are investigating a star system 100 light-years away with six sub-Neptune planets in near-perfect orbital resonance, piquing the interest of scientists searching for alien technology, or technosignatures. Space.com reports: To be clear, no such evidence was found in the system, dubbed HD 110067. However, the researchers say they're not done looking yet. HD 11067 remains an interesting target for similar observations in the future. In our own tiny pocket of the cosmos, radio waves from satellites and telescopes beaming out in the plane of our solar system, meaning that if somebody outside our solar system watched Earth cross the face of our sun, they'd maybe be able to pick up a signal that coincides with the planet's transit.

HD 110067 is viewed edge on from Earth, so we are seeing the six planets in the plane of their system -- a view that gives us an excellent chance of picking up such a signal if there exists one, study co-author Steve Croft, a radio astronomer working with the life-searching Breakthrough Listen program at the University of California, Berkeley, told Space.com "Our technology in our own solar system has spread outside the habitable zone," Croft told Space.com. So technology-friendly civilization in HD 110067, if any, may have communication relays set up on multiple planets in the system, he said. "Even if it is a negative result, that still tells us something."

When HD 110067's discovery was announced, Croft and his team used the world's largest fully steerable telescope, the Green Bank Telescope (GBT) in West Virginia, and searched the system for signs of alien technology. The researchers looked for signals that were continuously present when the telescope was pointed at the system and absent when directed away, the smoking gun of technosignatures local to HD 110067. But such signals are difficult to distinguish from natural sources of radio waves and humankind's own technological signals, such as radio waves beaming from cell phones connected to Wi-Fi, SpaceX's Starlink satellite network in low Earth orbit. This creates a haystack of signals in which researchers look for a needle of a potential extraterrestrial signal, said Croft. "I should add we don't know if there are needles in the haystack," he said. "We don't really know what the needles look like." The research has been published in the journal Research Notes of the AAS.

According to a new study published in the journal Proceedings of the National Academy of Sciences, West Antarctica's Thwaites Glacier began rapidly receding in the 1940s -- much earlier than scientists had previous thought. The Hill notes that it's often referred to as the "doomsday glacier" due to the potentially catastrophic consequences of its hypothetical collapse. From the report: While scientists had already observed the glacier's accelerated retreat by the 1970s, they did not know when it began. Coupled with earlier research about Thwaites's neighboring Pine Island Glacier, the study also provides new, potentially alarming, insight into the cause of the glacier's melting. Scientists tried to reconstruct the glacier's history using analysis of the marine sedimentary record, and they found the Thwaites and Pine Island glaciers both lost contact with the seafloor highs in the 1940s -- at around the same time. These significant changes happened against the backdrop of a massive El Nino weather phenomenon, the scientists found, showing the glaciers "were responding to the same driver(s)."

"The synchronous ice retreat of these two major ice streams suggests that, rather than being driven by internal dynamics unique to each glacier, retreat in the Amundsen Sea drainage sector results from external oceanographic and atmospheric drivers, which recent modeling studies show are modulated by climate variability," the study read. The scientists note that the glaciers' continued retreat shows how difficult it can be to reverse some of the consequences of naturally occurring weather events -- which they say is made even more difficult by human activity. "That ice streams such as Thwaites Glacier and Pine Island Glacier have continued to retreat since then indicates that they were unable to recover after the exceptionally large El Nino event of the 1940s," the scientists wrote. "This may reflect the increasing dominance of anthropogenic forcing since that time but implies that this involved large-scale, in additional to local, atmospheric and ocean circulation changes."

Robin George Andrews writes via The New York Times: In 2022, when NASA's $325 million spacecraft crashed into an asteroid named Dimorphos at 14,000 miles per hour, cheers and applause erupted back on Earth. NASA's Double Asteroid Redirection Test (DART) mission deliberately targeted Dimorphos to change its orbit around the larger asteroid Didymos as a dress rehearsal of sorts for thwarting a deadly space rock that might someday head toward Earth. The world's first-ever planetary defense experiment was deemed a triumph: The asteroid's orbit shrank by 33 minutes, far above the minimum threshold of 73 seconds. But what the DART team didn't realize then was just how bizarrely Dimorphos responded to that punch. A new study, published on Monday in Nature Astronomy, has concluded that DART hit Dimorphos so hard that the asteroid changed shape.

Simulations of the impact suggest that the spacecraft's death did not excavate a normal, bowl-shaped crater. Instead, it left behind something that resembles a dent. And although the artificial impact blasted millions of tons of rock into space, plenty splashed back onto its sides like tremendous tidal waves. It widened Dimorphos, transforming it from a squat orb into a flat-topped oval -- like an M&M candy. That the asteroid acted like a fluid comes down to its peculiar composition. It's not a solid contiguous rock, but more like "a pile of sand," said Sabina Raducan, a planetary scientist at the University of Bern in Switzerland and the study's lead author. And a low-density asteroid barely held together by its own gravity was never going to respond in a straightforward manner when a van-size spacecraft flew into its face.

Dimorphos's response is "completely outside of the realm of physics as we understand it" in our day-to-day lives, said Cristina Thomas, the lead of the mission's observations working group at Northern Arizona University who was not involved with the study. And "this has overarching implications for planetary defense." DART showed that a tiny spacecraft can deflect an asteroid. But the study indicates that crashing a similarly disjointed space rock too forcefully risks fragmenting it, which, in a real asteroid emergency, could create multiple Earthbound asteroids. Planetary defense, as a concept, clearly works. "We know we can do it," said Federica Spoto, an asteroid dynamics researcher at the Center for Astrophysics, Harvard and Smithsonian, who was not involved with the new study. "But we have to do it right."

Netflix's new sci-fi drama Spaceman centers on Czech astronaut Jakub Procházk, described by Polygon as "painfully introverted, emotionally repressed, and above all, quiet... so muted and compressed, he seems like a trauma victim." The film, adapted from the 2017 novel Spaceman of Bohemia written by Czech author Jaroslav KalfaÅ(TM), is a solemn drama in the mold of Andrei Tarkovsky's Solaris, or to some degree, Christopher Nolan's Interstellar. The story revolves around Jakub's disintegrating frame of mind after eight months alone in space as he investigates a glowing cosmic phenomenon that's become visible from Earth. Meanwhile, his wife Lenka (Carey Mulligan), heavily pregnant and going through her own breakdown back home, decides to leave Jakub, and his handlers (Isabella Rossellini among them) work to keep him from finding out. And then the giant spider appears, and Jakub worries that he's losing his mind.
CNN says Sandler's deal with Netflix "means pretty much doing whatever he wants, which, in the case of Spaceman, means traveling to the furthest reaches of space as the near-solitary star of a pretentious, message-heavy drama."

You can watch a trailer here. The movie enjoys a "limited theatrical release" this weekend, and will stream on Netflix starting March 1.

In 2019 a SpaceX Falcon 9 rocket launched an Israeli spacecraft carrying a 30-million page archive of human civilization to the moon. Unfortunately, that spacecraft crashed. But thanks to this week's moon landing by the Odysseus, there's now a 30-million page "Lunar Library" on the moon — according to a Medium post by the Arch Mission Foundation.

"This historic moment secures humanity's cultural heritage and knowledge in an indestructible archive built to last for up to billions of years." Etched onto thin sheets of nickel, called NanoFiche, the Lunar Library is practically indestructible and can withstand the harsh conditions of space... Some of the notable content includes:


The Wikipedia. The entire English Wikipedia containing over 6 million articles on every branch of knowledge.
Project Gutenberg. Portions of Project Gutenberg's library of over 70,000 free eBooks containing some of our most treasured literature.
The Long Now Foundation's Rosetta Project archive of over 7,000 human languages and The Panlex datasets.
Selections from the Internet Archive's collections of books and important documents and data sets.
The SETI Institute's Earthling Project, featuring a musical compilation of 10,000 vocal submissions representing humanity united
The Arch Lunar Art Archive containing a collection of works from global contemporary and digital artists in 2022, recorded as NFTs.
David Copperfield's Magic Secrets — the secrets to all his greatest illusions — including how he will make the Moon disappear in the near future.
The Arch Mission Primer — which teaches a million concepts with images and words in 5 languages.
The Arch Mission Private Library — containing millions of pages as well as books, documents and articles on every subject, including a broad range of fiction and non-fiction, textbooks, periodicals, audio recordings, videos, historical documents, software sourcecode, data sets, and more.
The Arch Mission Vaults — private collections, including collections from our advisors and partners, and a collection of important texts and images from all the world's religions including the great religions and indigenous religions from around the world, collections of books, photos, and a collection of music by leading recording artists, and much more content that may be revealed in the future...


We also want to recognize our esteemed advisors, and our many content partners and collections including the Wikimedia Foundation, the Long Now Foundation, The SETI Institute Earthling Project, the Arch Lunar Art Archive project, Project Gutenberg, the Internet Archive, and the many donors who helped make the Lunar Library possible through their generous contributions. This accomplishment would not have happened without the collaborative support of so many...

We will continue to send backups of our important knowledge and cultural heritage — placing them on the surface of the Earth, in caves and deep underground bunkers and mines, and around the solar system as well. This is a mission that continues as long as humanity endures, and perhaps even long after we are gone, as a gift for whoever comes next.
Space.com has a nice rundown of the other new payloads that just landed on the moon. Some highlights:

• "Cloud computing startup Lonestar's Independence payload is a lunar data center test mission for data storage and transmission from the lunar surface."
• LRA is a small hemisphere of light-reflectors built to servce as a precision landmark to "allow spacecraft to ping it with lasers to help them determine their precise distance..."
• ROLSES is a radio spectrometer for measuring the electron density near the lunar surface, "and how it may affect radio observatories, as well as observing solar and planetary radio waves and other phenomena."
• "Artist Jeff Koons is sending 125 miniature stainless steel Moon Phase sculptures, each honoring significant human achievements across cultures and history, to be displayed on the moon in a cube. "

"Crypto mines will have to start reporting their energy use in the U.S.," wrote the Verge in January, saying America's Energy department would "begin collecting data on crypto mines' electricity use, following criticism from environmental advocates over how energy-hungry those operations are."

But then "constitutional freedoms" group New Civil Liberties Alliance (founded with seed money from the Charles Koch Foundation) objected. And "on behalf of its clients" — the Texas Blockchain Council and Colorado bitcoin mining company Riot Platforms — the group said it "looks forward to derailing the Department of Energy's unlawful data collection effort once and for all."

While America's Energy department said the survey would take 30 minutes to complete, the complaint argued it would take 40 hours. According to the judge, the complaint "alleged three main sources of irreparable injury..."

- Nonrecoverable costs of compliance with the Survey
- A credible threat of prosecution if they do not comply with the Survey
- The disclosure of proprietary information requested by the Survey, thus risking disclosure of sensitive business strategy

But more importantly, the survey was implemented under "emergency" provisions, which the judge said is only appropriate when "public harm is reasonably likely to result if normal clearance procedures are followed."

Or, as Semafor.com puts it, the complaint was "seeking to push off the reporting deadline, on the grounds that the survey was rushed through...without a public comment period." The judge, Alan Albright, granted the request late Friday night, blocking the [Department of Energy's Information Administration] from collecting survey data or requiring bitcoin companies to respond to it, at least until a more comprehensive injunction hearing scheduled for Feb. 28. The ruling also concludes that the plaintiffs are "likely to succeed in showing that the facts alleged by the U.S. Energy Information Administration to support an emergency request fall far short of justifying such an action."
The U.S. Department of Energy is now...

• Restrained from requiring Plaintiffs or their members to respond to the Survey
• Restrained from collecting data required by the Survey
• "...and shall sequester and not share any such data that Defendants have already received from Survey respondents."

Thanks to long-time Slashdot reader schwit1 for sharing the news.

On Wednesday afternoon "a European Space Agency satellite reentered Earth's atmosphere over the North Pacific Ocean..." reports CNN, "and there have been no reports of damage, according to the agency." The agency's Space Debris Office, along with an international surveillance network, monitored and tracked the Earth-observing ERS-2 satellite throughout February to make predictions about the reentry, which occurred at 12:17 p.m. ET Wednesday. The ESA provided continuous live updates on its website. At around 50 miles (80 kilometers) above Earth's surface, the satellite broke apart due to atmospheric drag, and the majority of the fragments were expected to burn up in the atmosphere.

The agency said it was possible that some fragments could reach the planet's surface, but the pieces didn't contain any harmful substances and likely fell into the ocean... The ERS-2 satellite had an estimated mass of 5,057 pounds (2,294 kilograms) after depleting its fuel, according to the agency. "Uncontrolled Atmospheric reentry has long been a common method for disposing of space objects at the end of their mission," said Tim Flohrer, head of the agency's Space Debris Office, in a statement. "We see objects similar in size or larger to ERS-2 reentering the atmosphere multiple times each year."

The Earth-observing ERS-2 satellite first launched on April 21, 1995, and it was the most sophisticated satellite of its kind at the time to be developed and launched by Europe... In 2011, the agency decided to end the satellite's operations and deorbit it, rather than adding to the swirl of space junk orbiting the planet. The satellite executed 66 deorbiting maneuvers in July and August of 2011 before the mission officially concluded later that year on September 11. The maneuvers burned through the rest of the satellite's fuel and decreased its altitude, setting ERS-2's orbit on a trajectory to slowly spiral closer to Earth and reenter the atmosphere within 15 years.

The chances of an individual person being injured by space debris each year are less than 1 in 100 billion, about 1.5 million times lower than the risk of being killed in an accident at home, according to the agency.

On Thursday, the Odysseus Moon lander made history by becoming the first ever privately built and operated robot to complete a soft lunar touchdown. While the lander is "alive and well," the CEO of Houston-based Intuitive Machines, which built and flew the lander, said it tipped over during its final descent, coming up to rest propped up sideways on a rock. The BBC reports: Its owner, Texan firm Intuitive Machines, says Odysseus has plenty of power and is communicating with Earth. Controllers are trying to retrieve pictures from the robot. Steve Altemus, the CEO and co-founder of IM, said it wasn't totally clear what happened but the data suggested the robot caught a foot on the surface and then fell because it still had some lateral motion at the moment of landing. All the scientific instruments that planned to take observations on the Moon are on the side of Odysseus that should still allow them to do some work. The only payload likely on the "wrong side" of the lander, pointing down at the lunar surface, is an art project.

"We're hopeful to get pictures and really do an assessment of the structure and assessment of all the external equipment," Mr Altemus told reporters. "So far, we have quite a bit of operational capability even though we're tipped over. And so that's really exciting for us, and we are continuing the surface operations mission as a result of it." The robot had been directed to a cratered terrain near the Moon's south pole, and the IM team believes it got very close to the targeted site - perhaps within a couple of kilometers. A US space agency satellite called the Lunar Reconnaissance Orbiter will search for Odysseus in the coming days.

Microplastics have been found in sediment layers that date back as early as the first half of the 1700s, "showing microplastics' pernicious ability to infiltrate even environments untouched by modern humans," reports Futurism. From the report: A team of European researchers made this alarming discovery after studying the sediment layers at three lakes in Latvia, as detailed in a study published in the journal Science Advances. The scientists were studying lake sediment to test if the presence of microplastics in geological layers would be a reliable indicator for the beginning of the Anthropocene Epoch, defined in the study as starting in 1950 and meant to delineate when humans started having a large impact on our environment.

Scientists have long used layers of ash or ice to study past events on Earth, leading to the question of whether microplastics can serve as a reliable chronological marker for the Anthropocene. Clearly not, according to this new research, which found microplastics in every layer of sediment they dredged up, including one from 1733. "We conclude that interpretation of microplastics distribution in the studied sediment profiles is ambiguous and does not strictly indicate the beginning of the Anthropocene Epoch," the scientists wrote.

Three top-tier X-class solar flares launched off the sun between Wednesday and Thursday. The first two occurred seven hours apart, coming in at X1.9 and X1.6 magnitude respectively. The third, the most powerful of the current 11-year "solar cycle," ranked an impressive X6.3. From a report: Solar flares, or bursts of radiation, are ranked on a scale that goes from A, B and C to M and X, in increasing order of intensity. They usually originate from sunspots, or bruiselike discolorations on the surface of the sun. Sunspots are most common near the height of the 11-year solar cycle. The current cycle, number 25, is expected to reach its peak this year. The more sunspots, the more opportunities for solar flares.

Solar flares and accompanying coronal mass ejections, or CMEs, can influence "space weather" across the solar system, and even here on Earth. CMEs are slower shock waves of magnetic energy from the sun. Flares can reach Earth in minutes, but CMEs usually take at least a day. All three of the X-class solar flares disrupted shortwave radio communications on Earth. But the first two flares did not release a CME; the verdict is still out regarding whether the third flare did. High-frequency radio waves propagate by bouncing off electrons in Earth's ionosphere. That's a layer of Earth's atmosphere between 50 and 600 miles above the ground.

When a solar flare occurs, that radiation travels toward Earth at the speed of light. It can ionize additional particles in the lower ionosphere. Radio waves sent from devices below it then impact that extra-ionized layer and lose energy, and aren't able to be bent by ions at the top of the ionosphere. That means signals can't travel very far, and radio blackouts are possible. Three back-to-back radio blackouts occurred in response to the trio of flares, but primarily over the Pacific and Indian oceans. They were rated "R3" or greater on a 1 through 5 scale. According to the National Oceanic and Atmospheric Administration's Space Weather Prediction Center, that results in a "wide area blackout of [high frequency] radio communication, [and] loss of radio contact for about an hour on sunlit side of Earth." Low-frequency navigation signals, like those used on aircraft traveling overseas, can be degraded too.

Switzerland is advocating for a United Nations expert group to explore the merits of solar geoengineering. The proposal seeks to ensure multilateral oversight of solar radiation modification (SRM) research, amidst concerns over its potential implications for food supply, biodiversity, and global inequalities. The Guardian reports: The Swiss proposal, submitted to the United Nations environment assembly that begins next week in Nairobi, focuses on solar radiation modification (SRM). This is a technique that aims to mimic the effect of a large volcanic eruption by filling the atmosphere with sulphur dioxide particles that reflect part of the sun's heat and light back into space. Supporters of the proposal, including the United Nations environment program (UNEP), argue that research is necessary to ensure multilateral oversight of emerging planet-altering technologies, which might otherwise be developed and tested in isolation by powerful governments or billionaire individuals.

Critics, however, argue that such a discussion would threaten the current de-facto ban on geoengineering, and lead down a "slippery slope" towards legitimization, mainstreaming and eventual deployment. Felix Wertli, the Swiss ambassador for the environment, said his country's goal in submitting the proposal was to ensure all governments and relevant stakeholders "are informed about SRM technologies, in particular about possible risks and cross-border effects." He said the intention was not to promote or enable solar geoengineering but to inform governments, especially those in developing countries, about what is happening.

The executive director of the UNEP, Inger Andersen, stressed the importance of "a global conversation on SRM" in her opening address to delegates at a preliminary gathering in Nairobi. She and her colleagues emphasized the move was a precautionary one rather than an endorsement of the technology.

The Supreme Court's conservative majority seemed skeptical Wednesday as the Environmental Protection Agency sought to continue enforcing an anti-air-pollution rule in 11 states while separate legal challenges proceed around the country. From a report: The EPA's "good neighbor" rule is intended to restrict smokestack emissions from power plants and other industrial sources that burden downwind areas with smog-causing pollution. Three energy-producing states -- Ohio, Indiana and West Virginia -- challenged the rule, along with the steel industry and other groups, calling it costly and ineffective. The rule is on hold in a dozen states because of the court challenges.

The Supreme Court, with a 6-3 conservative majority, has increasingly reined in the powers of federal agencies, including the EPA, in recent years. The justices have restricted EPA's authority to fight air and water pollution -- including a landmark 2022 ruling that limited EPA's authority to regulate carbon dioxide emissions from power plants that contribute to global warming. The court also shot down a vaccine mandate and blocked President Joe Biden's student loan forgiveness program.

The court is currently weighing whether to overturn its 40-year-old Chevron decision, which has been the basis for upholding a wide range of regulations on public health, workplace safety and consumer protections. A lawyer for the EPA said the "good neighbor" rule was important to protect downwind states that receive unwanted air pollution from other states. Besides the potential health impacts, the states face their own federal deadlines to ensure clean air, said Deputy U.S. Solicitor General Malcolm Stewart, representing the EPA.

A spacecraft containing pharmaceutical drugs that were grown on orbit has finally returned to Earth today after more than eight months in space. From a report: Varda Space Industries' in-space manufacturing capsule, called Winnebago-1, landed in the Utah desert at around 4:40 p.m. EST. Inside the capsule are crystals of the drug ritonavir, which is used to treat HIV/AIDS. It marks a successful conclusion of Varda's first experimental mission to grow pharmaceuticals on orbit, as well as the first time a commercial company has landed a spacecraft on U.S. soil, ever. The capsule will now be sent back to Varda's facilities in Los Angeles for analysis, and the vials of ritonavir will be shipped to a research company called Improved Pharma for post-flight characterization, Varda said in a statement. The company will also be sharing all the data collected through the mission with the Air Force and NASA, per existing agreements with those agencies.

The first-of-its-kind reentry and landing is also a major win for Rocket Lab, which partnered with Varda on the mission. Rocket Lab hosted Varda's manufacturing capsule inside its Photon satellite bus; through the course of the mission, Photon provided power, communications, attitude control and other essential operations. At the mission's conclusion, the bus executed a series of maneuvers and de-orbit burns that put the miniature drug lab on the proper reentry trajectory. The final engine burn was executed shortly after 4 p.m. EST. Photon burned up in the atmosphere as planned while the capsule, protected by a heat shield and with the aid of a parachute, continued to land.

The brightest known object in the universe, a quasar 500tn times brighter than our sun, was "hiding in plain sight," researchers say. From a report: Australian scientists spotted a quasar powered by the fastest growing black hole ever discovered. Its mass is about 17bn times that of our solar system's sun, and it devours the equivalent of a sun a day. The light from the celestial object travelled for more than 12bn years to reach Earth. Australian National University scientists first spotted it using a 2.3-metre telescope at the university's NSW Siding Spring Observatory in Coonabarabran. They then confirmed the find using the European Southern Observatory's (ESO's) Very Large Telescope, which has a primary mirror of 8 metres. The findings by the ANU researchers, in collaboration with the ESO, the University of Melbourne, and France's Sorbonne Universite have been published in Nature Astronomy.

"For nearly a year now, a bizarre heating event has been unfolding across the world's oceans," reports Wired.

"In March 2023, global sea surface temperatures started shattering record daily highs and have stayed that way since..." Brian McNoldy, a hurricane researcher at the University of Miami. "It's really getting to be strange that we're just seeing the records break by this much, and for this long...." Unlike land, which rapidly heats and cools as day turns to night and back again, it takes a lot to warm up an ocean that may be thousands of feet deep. So even an anomaly of mere fractions of a degree is significant. "To get into the two or three or four degrees, like it is in a few places, it's pretty exceptional," says McNoldy.

So what's going on here? For one, the oceans have been steadily warming over the decades, absorbing something like 90 percent of the extra heat that humans have added to the atmosphere...

A major concern with such warm surface temperatures is the health of the ecosystems floating there: phytoplankton that bloom by soaking up the sun's energy and the tiny zooplankton that feed on them. If temperatures get too high, certain species might suffer, shaking the foundations of the ocean food web. But more subtly, when the surface warms, it creates a cap of hot water, blocking the nutrients in colder waters below from mixing upwards. Phytoplankton need those nutrients to properly grow and sequester carbon, thus mitigating climate change...

Making matters worse, the warmer water gets, the less oxygen it can hold. "We have seen the growth of these oxygen minimum zones," says Dennis Hansell, an oceanographer and biogeochemist at the University of Miami. "Organisms that need a lot of oxygen, they're not too happy when the concentrations go down in any way — think of a tuna that is expending a lot of energy to race through the water."
But why is this happening? The article suggests less dust blowing from the Sahara desert to shade the oceans, but also 2020 regulations that reduced sulfur aerosols in shipping fuels. (This reduced toxic air pollution — but also some cloud cover.)

There was also an El Nino in the Pacific ocean last summer — now waning — which complicates things, according to biological oceanographer Francisco Chavez of the Monterey Bay Aquarium Research Institute in California. "One of our challenges is trying to tease out what these natural variations are doing in relation to the steady warming due to increasing CO2 in the atmosphere."

But the article points out that even the Atlantic ocean is heating up — and "sea surface temperatures started soaring last year well before El Niño formed." And last week the U.S. Climate Prediction Center predicted there's now a 55% chance of a La Nina in the Atlantic between June and August, according to the article — which could increase the likelihood of hurricanes.

Thanks to long-time Slashdot reader mrflash818 for sharing the article.

Japanese scientists plan to launch a satellite made of magnolia wood this summer on a U.S. rocket, reports the Observer.

Experiments carried out on the International Space Station showed magnolia wood was unusually stable and resistant to cracking — and "when it burns up as it re-enters the atmosphere after completing its mission, will produce only a fine spray of Âbiodegradable ash." The LignoSat probe has been built by researchers at Kyoto University and the logging company Sumitomo Forestry in order to test the idea of using biodegradable materials such as wood to see if they can act as environmentally friendly alternatives to the metals from which all satellites are currently constructed. "All the satellites which re-enter the Earth's atmosphere burn and create tiny alumina particles, which will float in the upper atmosphere for many years," Takao Doi a Japanese astronaut and aerospace engineer with Kyoto University, warned recently. "Eventually, it will affect the environment of the Earth."

To tackle the problem, Kyoto researchers set up a project to evaluate types of wood to determine how well they could withstand the rigours of space launch and lengthy flights in orbit round the Earth. The first tests were carried out in laboratories that recreated conditions in space, and wood samples were found to have suffered no measurable changes in mass or signs of decomposition or damage. "Wood's ability to withstand these conditions astounded us," said Koji Murata, head of the project.

After these tests, samples were sent to the ISS, where they were subjected to exposure trials for almost a year before being brought back to Earth. Again they showed little signs of damage, a phenomenon that Murata attributed to the fact that there is no oxygen in space which could cause wood to burn, and no living creatures to cause it to rot.
The article adds that if it performs well in space, "then the door could be opened for the use of wood as a construction material for more satellites."

An article in the Washington Post remembers a 1980s-era "glass box with metal water pipes running through it" that "converted sunlight into hot water. By trapping solar energy like a greenhouse, it heated the water to a scorching 180 degrees Fahrenheit.

"[T]oday, hardly anyone is using these solar water heaters even as photovoltaic panels have popped up on the roofs of nearly 4 million American homes." Unlike photovoltaic panels, which can power your home, solar thermal panels are mainly used to heat water. But they're smaller and more efficient. The technology converts 60 to 70 percent of the sun's energy into heat. Even the best photovoltaics, which generate electricity, only achieve 24 percent efficiency. Now, a new generation of solar water heater manufacturers is hoping subsidies under the Inflation Reduction Act, and growing interest in net-zero emissions, will reignite their growth.

Theoretically, solar thermal offers a big opportunity to slash emissions. Nearly 20 percent of an average home's energy is used to heat water, and nearly 50 percent globally, according to MIT. By adopting solar water heaters, the average household can keep 2 tons of carbon dioxide out of the atmosphere, the equivalent of not driving your car for four months, estimates the Environmental Protection Agency. Solar water heaters can also save money, cutting the average utility bill by $400 to $600 per year, the Energy Department estimates...

Only about 370,000 solar thermal systems were operating in the United States by the end of 2021, according to the International Energy Agency, many of them on larger commercial buildings...

Since they can cut fuel consumption to heat water by 50 percent to 70 percent, other countries are embracing the technology: Almost all new residential buildings in Israel must include solar thermal, while in countries as far north as Canada and Denmark, solar thermal energy warms millions of homes with district heating systems. Yet these systems represent a tiny fraction of the potential, supplying 0.4 percent of today's global energy demand for domestic hot water.
New U.S. subsidies can cut the price in half depending on location, the article points out.

Cheap photovoltaics still make economic sense for many homes (unless you're heating a pool). "But the cost of solar thermal could look like a bargain if we consider increasingly unreliable electric grids and the cost to the climate from burning fossil fuels."

For the first time, scientists say they've detected water molecules on the surface of an asteroid. Space.com reports: Scientists studied four silicate-rich asteroids using data gathered by the now-retired Stratospheric Observatory for Infrared Astronomy (SOFIA), a telescope-outfitted plane operated by NASA and the German Aerospace Center. Observations by SOFIA's Faint Object InfraRed Camera (FORCAST) instrument showed that two of the asteroids -- named Iris and Massalia -- exhibit a specific wavelength of light that indicated the presence of water molecules at their surface, a new study reports.

While water molecules have previously been detected in asteroid samples returned to Earth, this is the first time that water molecules have been found on the surface of an asteroid in space. In a previous study, SOFIA found similar traces of water on the surface of the moon, in one of the largest craters in its southern hemisphere. [...]

Therefore, the findings at Iris and Massalia suggest that some silicate asteroids can conserve some of their water over the eons and may be more commonly found in the inner solar system than previously thought. In fact, asteroids are believed to be the primary source of Earth's water, providing the necessary elements for life as we know it. Understanding of the distribution of water through space will help researchers better assess where to search for other forms of potential life, both in our solar system and beyond. The findings have been published in The Planetary Science Journal.

According to NASA, the OSIRIS-REx mission has successfully collected 121.6 grams, or almost 4.3 ounces, of rock and dust from the asteroid Bennu. Universe Today reports: These samples have been a long time coming. The OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer) was approved by NASA back in 2011 and launched in September 2016. It reached its target, the carbonaceous Apollo group asteroid 101955 Bennu, in December 2018. After spending months studying the asteroid and reconnoitring for a suitable sampling location, it selected one in December 2019. After two sampling rehearsals, the spacecraft gathered its sample on October 20th, 2020. In September 2023, the sample finally returned to Earth.

For OSIRIS-REx to be successful, it had to collect at least 60 grams of material. With a final total that is double that, it should open up more research opportunities and allow more of the material to be held untouched for future research. NASA says they will preserve 70% of the sample for the future, including for future generations. The next step is for the material to be put into containers and sent to researchers. More than 200 researchers around the world will receive samples. Many of the samples will find their way to scientists at NASA and institutions in the US, while others will go to researchers at institutions associated with the Canadian Space Agency, JAXA, and other partner nations. Canada will receive 4% of the sample, the first time that Canada's scientific community will have direct access to a returned asteroid sample.