logo
Study warns of dramatic Austrian glacier melt

Study warns of dramatic Austrian glacier melt

Observer16-04-2025

Experts are warning that the once mighty glaciers of Austria could almost completely disappear in the foreseeable future due to climate change.
In order to save even a small part of the ice masses, the global temperature increase would have to be limited to 1.5 degrees Celsius,according to a study by an Austrian-British research team published in the journal The Cryosphere on Thursday.
Five glaciers completely disappeared in the Ötztal and Stubaitalregions between 2006 and 2017.
A temperature increase of 2.7 degrees is currently expected. "The window of opportunity is closing very quickly," said co-author Fabien Maussion from the Universities of Bristol and Innsbruck.
The researchers' prognosis refers to glaciers in the province of Tyrol. However, the results can be applied to the whole of Austria ,according to the study.
"We are watching the glaciers disappear. Ice remnants that no longer have any flow movement or a feeding area are actually no longer glaciers. They are called dead ice," said a researcher from theInstitute for Interdisciplinary Mountain Research at the Austrian Academy of Sciences (ÖAW).
Glaciers are crucial freshwater reservoirs for Austria, releasing vital water that feeds its rivers and lakes. This supply is not only integral for drinking water but also supports the agricultural sector through irrigation.
In addition to freshwater, these glaciers are a cornerstone of Austria's energy infrastructure. Hydropower accounts for a substantial amount of the country's electricity generation, and the consistent water flow from melting glaciers is essential for maintaining operational efficiency of hydropower plants, particularly during periods of low precipitation. —dpa

Orange background

Try Our AI Features

Explore what Daily8 AI can do for you:

Comments

No comments yet...

Related Articles

World coming up short on promised marine sanctuaries
World coming up short on promised marine sanctuaries

Observer

time5 days ago

  • Observer

World coming up short on promised marine sanctuaries

Brest: A global target of having 30 per cent of the oceans become protected areas by 2030 is looking more fragile than ever, with little progress and the United States backing away, conservationists say. "With less than 10 per cent of the ocean designated as MPAs (marine protected areas) and only 2.7 per cent fully or highly protected, it is going to be difficult to reach the 30 per cent target," said Lance Morgan, head of the Marine Conservation Institute in Seattle, Washington. The institute maps the MPAs for an online atlas, updating moves to meet the 30 per cent goal that 196 countries signed onto in 2022, under the Kunling-Montreal Global Biodiversity Framework. The ambition is notably at risk because "we see countries like the US reversing course and abandoning decades of bipartisan efforts" to protect areas of the Pacific Ocean, Morgan said. That referred to an April executive order by President Donald Trump authorising industrial-scale fishing in big swathes of an MPA in that ocean. Currently, there are 16,516 declared MPAs in the world, covering just 8.4 per cent of the oceans. But not all are created equal: some forbid all forms of fishing, while others place no roles, or almost none, on what activities are proscribed or permitted. "Only a third of them have levels of protection that would yield proper benefits" for fish, said Joachim Claudet, a socio-ecology marine researcher at France's CNRS. Daniel Pauly, a professor of fisheries science at Canada's University of British Columbia, said "The marine protected areas have not really been proposed for the protection of biodiversity" but "to increase fish catches". A proper MPA "exports fish to non-protected zones, and that should be the main reason that we create marine protected areas — they are needed to have fish", he said. When fish populations are left to reproduce and grow in protected areas, there is often a spillover effect that sees fish stocks outside the zones also rise, as several scientific journals have noted, especially around a no-fishing MPA in Hawaiian waters that is the biggest in the world. One 2022 study in the Science journal showed a 54 per cent increase in yellowfin tuna around that Hawaiian MPA, an area now threatened by Trump's executive order, Pauly said. For such sanctuaries to work, there need to be fishing bans overall or at least some of their zones, Claudet said. But MPAs with such restrictions account for just 2.7 per cent of the ocean's area and are almost always in parts that are far from areas heavily impacted by human activities. In Europe, for instance, "90 per cent of the marine protected areas are still exposed to bottom trawling," a spokesperson for the NGO Oceana, Alexandra Cousteau, said. "It's ecological nonsense." Pauly said that "bottom trawling in MPAs is like picking flowers with a bulldozer... they scrape the seabed". Oceana said French MPAs suffered intensive bottom trawling, 17,000 hours' worth in 2024, as did those in British waters, with 20,600 hours. The NGO is calling for a ban on the technique, which involves towing a heavy net along the sea floor, churning it up. A recent WWF report said that just two per cent of European Union waters were covered by MPAs with management plans, even some with no protection measures included. The head of WWF's European office for the oceans, Jacob Armstrong, said that was insufficient to protect oceanic health. Governments need to back words with action, he said, or else these areas would be no more than symbolic markings on a map. — AFP

Chicago museum's fossil yields insights on famed early bird Archaeopteryx
Chicago museum's fossil yields insights on famed early bird Archaeopteryx

Observer

time19-05-2025

  • Observer

Chicago museum's fossil yields insights on famed early bird Archaeopteryx

A new analysis of a pigeon-sized Archaeopteryx fossil in the collection of the Field Museum in Chicago is revealing an array of previously unknown features of the earliest-known bird, providing insight into its feathers, hands, feet and head. The specimen, unearthed in southern Germany, is one of the most complete and best preserved of the 14 known fossils of Archaeopteryx identified since 1861. The discovery of the first Archaeopteryx fossil, with its blend of reptile-like and bird-like features, caused a sensation, lending support to British naturalist Charles Darwin's ideas about evolution and showing that birds had descended from dinosaurs. The new study, examining the Chicago fossil using UV light to make out soft tissues and CT scans to discern minute details still embedded in the rock, shows that 164 years later there is more to learn about this celebrated creature that took flight 150 million years ago during the Jurassic Period. The researchers identified anatomical traits indicating that while Archaeopteryx was capable of flight, it probably spent a lot of time on the ground and may have been able to climb trees. The scientists identified for the first time in an Archaeopteryx fossil the presence of specialized feathers called tertials on both wings. These innermost flight feathers of the wing are attached to the elongated humerus bone in the upper arm. Birds evolved from small feathered dinosaurs, which lacked tertials. The discovery of them in Archaeopteryx, according to the researchers, suggests that tertials, present in many birds today, evolved specifically for flight. Feathered dinosaurs lacking tertials would have had a gap between the feathered surface of their upper arms and the body. "To generate lift, the aerodynamic surface must be continuous with the body. So in order for flight using feathered wings to evolve, dinosaurs had to fill this gap - as we see in Archaeopteryx," said Field Museum paleontologist Jingmai O'Connor, lead author of the study published on Wednesday in the journal Nature. "Although we have studied Archaeopteryx for over 160 years, so much basic information is still controversial. Is it a bird? Could it fly? The presence of tertials supports the interpretation that the answer to both these questions is 'yes,'" O'Connor added. The delicate specimen, preserved in three dimensions rather than squashed flat like many fossils, was painstakingly prepared to protect soft tissue remains, which glowed under ultraviolet light. Birds are the only members of the dinosaur lineage to have survived a mass extinction 66 million years ago, caused by an asteroid striking Earth. Archaeopteryx boasted reptilian traits like teeth, a long and bony tail, and claws on its hands, alongside bird-like traits like wings formed by large, asymmetrical feathers. The soft tissue of its toe pads appears to have been adapted for spending a lot of its life on the ground, consistent with the limited flight capabilities that Archaeopteryx is believed to have possessed. "That's not to say it couldn't perch. It could do so still pretty well. But the point being that near the beginning of powered flight, Archaeopteryx was still spending most of its time on the ground," said study co-author Alex Clark, a doctoral student in evolutionary biology at the University of Chicago and the Field Museum. The soft tissue on the hand suggests that the first and third fingers were mobile and could be used for climbing. An examination of Archaeopteryx's palate - roof of the mouth - confirmed that its skull was immobile, unlike many living birds. But there was skeletal evidence of the first stages in the evolution of a trait that lets the beak move independently from the braincase, as seen in modern birds. The fossil possesses the only complete Archaeopteryx vertebral column, including two tiny vertebrae at the tip of the tail showing it had 24 vertebrae, one more than previously thought. The museum last year announced the acquisition of the fossil, which it said had been in the hands of a series of private collectors since being unearthed sometime before 1990. "This specimen is arguably the best Archaeopteryx ever found and we're learning a ton of new things from it," O'Connor said. "I consider Archaeopteryx to be the most important fossil species of all time. It is, after all, the icon of evolution, and evolution is the unifying concept of the biological sciences. Not only is Archaeopteryx the oldest-known fossil bird, with birds today being the most successful lineage of land vertebrates, it is the species that demonstrates that birds are living dinosaurs," O'Connor said. —Reuters

Scientists exploring how to beat heat for better sleep
Scientists exploring how to beat heat for better sleep

Observer

time13-05-2025

  • Observer

Scientists exploring how to beat heat for better sleep

Cool showers and less coffee or alcohol: sleep quality is being harmed by hotter temperatures caused by climate change, and scientists say we need to learn how to adapt. The human brain is very sensitive to heat, with higher temperatures raising the body's central thermostat and activating stress systems. Scientists are increasingly exploring mechanisms that can help the body adapt to rising temperatures affecting our sleep and leading to health complications. "Rising temperatures induced by climate change and urbanisation pose a planetary threat to human sleep, and therefore health, performance, and wellbeing," according to a 2024 review of scientific literature published in the journal Sleep Medicine. Humans lost an average of 44 hours of sleep a year during the first two decades of the 21st century compared to earlier periods, according to a 2022 study published in the journal One Earth, which linked the data to rising temperatures. The intensification of global warming could lead to an annual loss of 50 to 58 hours of sleep per person by 2099, according to research led by Kelton Minor, from the University of Copenhagen, based on data gathered from more than 47,000 individuals in 68 countries. "Interventional studies and field experiments are now urgently needed to foster adaptation and safeguard the essential restorative role of sleep in a hotter world," Minor and other authors of the paper said. Neurons regulating temperature and sleep in the brain are highly interconnected, and lowering the body's internal thermostat is key to improving sleep quality. Adapting to heat comes at a cost to the body, according to Fabien Sauvet, a researcher at Paris Cite University. "We sweat more and faster, for example, but it requires additional hydration. And it has limits, so during heatwaves, the most important thing is to adapt our behaviour," such as activities, schedules and clothing, Sauvet said. But humans could "tolerate higher temperatures than commonly thought", he added, pointing to several studies showing that good sleep quality can be achieved with a room temperature of up to 28 degrees Celsius (82.4 degrees Fahrenheit). Challenging "the false belief that the bedroom must be at 18-20C", he said that sleeping in light clothing such as a t-shirt and shorts, and with a simple sheet as well as good ventilation, could help dealing with a few more degrees. "If we always sleep with air conditioning, we will never acclimatise," he said. - Fight 'sleep enemies' - Armelle Rancillac, a neuroscientist at the Centre for Interdisciplinary Research in Biology, said anything beyond 28C "becomes much more complicated". An excessive lack of sleep is known to disrupt the body's recovery. In the short term, this can lead to drowsiness, fatigue and a higher risk of accidents at the workplace or on the road. In the long run, it can create a harmful sleep "debt", impacting our metabolism and increasing the risk of weight gain, diabetes, cardiovascular diseases and even neurodegenerative diseases like Alzheimer's, Rancillac said. A sleep deficit can also reduce stress resistance and have a negative impact on mental health. To sleep better in a hotter environment, Rancillac stressed that there is a need to "eliminate or at least pay attention to sleep enemies". Before bedtime, it is recommended to take a cool shower -- but not an icy one -- reduce stimulants like coffee, and limit alcohol, which facilitates falling asleep but slightly raises the internal body temperature. Avoid hot tubs after a workout, opting instead for outdoor temperatures or a cold bath, said Sauvet. Napping during the hottest hours of the day have also been proven to mitigate the impacts of a sleep deficit. Short naps -- "30 to 40 minutes, and before 2:00 pm" -- are ideal, so as not to interfere with a good night's sleep, according to the researcher.

DOWNLOAD THE APP

Get Started Now: Download the App

Ready to dive into the world of global news and events? Download our app today from your preferred app store and start exploring.
app-storeplay-store