Articles tagged with Antarctica
A Kobe University research team analyzes the political repercussions of a proposed underwater curtain to protect Antarctic ice sheets from melting. The team highlights concerns around authority, sovereignty, and security, emphasizing the need for international cooperation to avoid conflict.
A team of researchers analyzed historical marking data from the Discovery Marking Program to investigate Antarctic blue whale population structure. They found frequent mixing among ocean basins, indicating a single circumpolar population. This study provides valuable insights into the conservation of this endangered species.
Researchers have discovered two Antarctic actinomycete strains with strong antifungal properties against the fungus causing banana wilt. The strains, Streptomyces polyrhachis and Streptomyces fildesensis, showed effective inhibition of Fusarium oxysporum growth, making them potential biocontrol agents for sustainable disease management.
A team of researchers has made the southernmost discovery of amber in the world, revealing environmental conditions and forest ecosystems near the South Pole. The 'Pine Island amber' provides direct insights into a swampy, conifer-rich, temperate rainforest environment 90 million years ago.
Scientists from the University of East Anglia have discovered a 50-metre-thick 'intrusion' of warm water under the Ross Ice Shelf, which has increased heat transport into the cavity by 45% over the last four decades. This finding suggests that climate change will likely lead to further melting and ice loss.
A computer model uses camera pose estimation and phototourism data to reconstruct the 3D scene of Antarctic penguin colonies, allowing for their identification and tracking. This innovative approach enables researchers to study and monitor penguin populations more effectively.
Researchers found that Weddell seals strategically conduct extreme dives earlier in the day to maximize their oxygen stores and foraging success. By avoiding midday dives, the seals can spend more time underwater, taking advantage of high-light conditions, which is ideal for visual hunting.
A new study has identified novel strains of microbes that have adapted to use limited resources in cities, including those found in Hong Kong's subways and skin. These microbes can metabolize manufactured products, posing health risks if they are pathogenic.
The Antarctic Peninsula has experienced a dramatic increase in vegetation cover over the last four decades, with satellite data showing an acceleration of 30% in recent years. This 'greening' trend is attributed to climate change and has significant implications for the region's ecosystem and environmental future.
A new study reveals that Antarctic krill can lock away similar levels of carbon as key coastal habitats like seagrasses and mangroves. The research shows that krill store around 20 million tonnes of carbon annually, equivalent to a significant value in terms of carbon storage.
Researchers have gained insights into clouds in Antarctica using a new platform, discovering warm air intrusions and sulphate aerosol at high altitudes. The study, conducted over 12 months, was the first to investigate vertical distribution of aerosol particles and clouds above the German Neumayer Station III.
A Dartmouth-led study projects that Antarctica's glaciers will rapidly retreat and potentially collapse by 2200, increasing global sea levels by up to 5.5 feet by 2300. The researchers used 16 ice-sheet models to refine the projection of ice loss over the next 300 years.
New research using satellite technology tracks the movement of albatrosses and petrels, finding that they use sea ice-affected parts of the ocean for feeding and scavenging. The study suggests that Antarctica's shrinking sea ice could force seabirds to travel further or alter their food patterns, affecting ecosystems.
Research explores changes in global precipitation patterns and how they relate to climate change. Bird nests are found to predict rainfall in rural India, while heat stress is increasing in the southeastern US, particularly at night. European 'bomb' storms may intensify due to warming climate.
A discovery of 18 theropod tracks and four ornithopod tracks in the Wonthaggi Formation reveals that large carnivores roamed polar environments, feeding on prey like smaller dinosaurs, fish, and turtles. The finds confirm that a variety of dinosaurs lived and walked on the ground where their bones were found.
Scientists studied the effects of Antarctica's record-breaking heat wave on its ecosystem, finding that extreme temperatures disrupted the life cycles of organisms. The study highlights the potential impacts of climate change on fragile Antarctic ecosystems, where even small changes can have significant consequences.
A new species of Antarctic dragonfish, Akarotaxis gouldae, has been identified in waters off the western Antarctic Peninsula. The discovery highlights the fragile state of the Antarctic ecosystem and raises concerns about the impact of commercial fishing activities on this vulnerable species.
Researchers found that floating objects can reach Antarctic waters from more sources than previously thought, threatening the continent's unique ecosystems. Non-native marine species can colonize Antarctica by catching a ride on kelp, driftwood, and plastic debris.
A new study led by Dartmouth researchers questions the rapid polar ice collapse model used in the IPCC's sixth assessment report. The team found that the expected rate of retreat is significantly lower than predicted, making the worst-case scenario less likely, but still dire due to ongoing ice loss from Greenland and Antarctica.
A team of scientists identified 30 new Key Biodiversity Areas (KBAs) in the Southern Ocean that are crucial for conserving native wildlife populations. These areas were found to be vital for foraging, breeding, and migration, and are under threat from human activities such as fishing and tourism.
A March 2022 weather event in Antarctica caused record-high death rates for invertebrate organisms. The event, which resulted in a massive thaw, was studied to understand its impact on the ecosystem and predict future responses to climate change.
Scientists have developed a state-of-the-art computational model predicting land, ice and global sea-level interactions. The model estimates that reducing greenhouse gas emissions could slow melting Antarctic ice enough to allow Earth uplift to partially stabilize the ice sheet and prevent some future sea-level rise.
A new study suggests that the rising earth in Antarctica will impact future sea level rise, depending on how much global warming is controlled. If humans lower greenhouse gas emissions, upward shifts in solid earth could reduce Antarctica's contribution to sea level rise by about 40%, bolstering best-case scenarios for global sea level...
Researchers discovered a new type of parasitic behavior in ancient Antarctic archaea, which can kill their hosts and impact ecosystem balance. The study provides insights into these unique microorganisms' role in supporting Earth's ecosystems and holds promise for biotechnological applications.
A research team deployed an unmanned submersible to map the underside of a floating ice shelf in Antarctica, revealing high melt rates and unique patterns. The findings raise questions about current models for predicting sea level rise.
Researchers deployed an unmanned submarine 'Ran' under thick ice in Antarctica, revealing high-resolution maps of the glacier's underside. The findings indicate that stronger underwater currents and flowing water influence the melting process, with complex patterns and formations resembling sand dunes.
The Antarctic ice sheet formed around 34 million years ago in the eastern region of the continent, rather than the entire continent as previously thought. The study reveals that different regions of the ice sheet react differently to external influences and climatic changes.
Researchers used AI to map slush on Antarctic ice shelves and found that 57% of all meltwater is held in slush, with a significant impact on ice shelf stability and sea level rise. This discovery could lead to more accurate predictions of ice sheet melting and collapse.
Scientists at British Antarctic Survey have identified a new tipping point in Antarctic ice sheet melting due to ocean water intrusion. This process, currently not included in models, could lead to significant underestimates of sea level rise and accelerated ice sheet melting.
Researchers observed extreme cold temperatures across a broad region of Antarctica in late winter 2023, with record low temperatures recorded at multiple locations. The study highlights the importance of understanding atmospheric environments that lead to extreme cold temperatures and their impact on Antarctic operations.
Researchers at the University of Copenhagen have tracked the evolution of glaciers in East Antarctica using hundreds of old aerial photographs dating back to 1937. The study reveals that the ice has remained stable and grown slightly over almost a century, partly due to increasing snowfall.
Researchers propose comprehensive strategy for climate-smart marine spatial planning (MSP) in the Southern Ocean, integrating diverse interests and addressing climate stressors. MSP can serve as a testbed for international waters, informing implementation of the UN Agreement on marine biodiversity beyond national jurisdiction.
Warm seawater is pumping underneath Antarctica's Thwaites Glacier, causing ice to melt intensely and leading to devastating sea level rise. Researchers predict the glacier may retreat into the deeper part of the basin within 10-20 years, accelerating glacier melt and impacting coastal communities worldwide.
Researchers discovered the missing piece of the puzzle behind a rare polynya in Antarctica's Maud Rise, which formed in 2016-2017. The team found that complex interactions between wind, ocean currents, and geography led to the polynya's persistence.
Researchers have uncovered a feedback loop that may be accelerating the melting of ice shelves in West Antarctica, contributing to global sea level rise. The study suggests that as ice shelves melt, they produce more freshwater, which strengthens an underwater current carrying warm water towards the ice shelf.
A University of Melbourne expedition revealed that wind is a key cause of colossal rogue waves. The team's observations confirmed theories and provided critical information for future rogue wave prediction models.
A new study reveals that meandering ocean currents and the ocean floor induce upwelling velocity, transporting warm water to shallower depths, contributing to rapid melting of Antarctic ice shelves. This process poses a significant threat to coastal communities worldwide due to rising global sea levels.
New study reveals high concentrations of small microplastics in surface water samples from the Southern Weddell Sea off Antarctica, surpassing previous studies. The research suggests ocean currents play a crucial role in pollution and highlights the need for further investigation into their impact.
Climate change causes melting of ice sheet, resulting in loss of about 5,000 meteorites per year. Researchers call for urgent action to preserve the scientific value of meteorites and reduce greenhouse gas emissions.
A new study reveals that the Ross Ice Shelf, the largest ice shelf in Antarctica, moves 6-8 centimeters once or twice a day due to slip events triggered by the Whillans Ice Stream. This movement has significant implications for understanding the stability of Antarctica's ice shelves and potential icequakes.
The Antarctic Circumpolar Current's flow speed has fluctuated significantly over the past 5.3 million years, with slower speeds during glacial periods and faster speeds during interglacials. This study provides valuable insights into the current's response to climate fluctuations and its impact on Antarctica's ice sheets.
A new study compares ancient and modern whole milk powders, revealing surprisingly similar compositions despite advancements in dairy production. The analysis of a 100-year-old Antarctic sample shows that key nutrients and protein structures remain largely unchanged.
A new study reveals the Antarctic Circumpolar Current's speedup is linked to Earth's temperature, slowing down during cold times and speeding up in warm ones. This suggests that today's speedup will continue as human-induced warming proceeds, potentially leading to ice loss and sea-level rise.
Researchers used a cruise ship to conduct marine science in Antarctica, highlighting an eco-friendly alternative to traditional research methods. The collaboration increased efficiency and reduced costs, allowing for more comprehensive studies of the Antarctic Ocean.
Research suggests polar climates are adjusting to a warming climate with changes in regional climate dynamics. Altered ocean-sea ice interactions may be driving recent fluctuations in sea ice extent, according to new studies.
A new study suggests that the Thwaites Glacier and Pine Island Glacier began experiencing significant glacial retreat in the 1940s, driven by an extreme El Niño climate pattern. This finding corroborates previous research on ice sheet dynamics and highlights the importance of external factors in controlling glacier behavior.
Research shows that undersea anchors of ice, known as pinning points, are shrinking at more than twice the rate compared to 50 years ago. This accelerated unanchoring of Antarctic ice shelves is expected to accelerate sea-level rise and global carbon emissions.
Researchers have made groundbreaking discoveries about the reproduction of giant Antarctic sea spiders, a phenomenon known as polar gigantism. The study found that these creatures do not carry their young like most other species, but instead attach them to rocks for several months before hatching.
A new study from UB and CSIC challenges the classical view on the origins of the Antarctic Circumpolar Current, a key regulator of the planet's climate. The research reveals that the current dates later than the beginning of the Antarctic glaciation, making it sensitive to changes in climate conditions.
A new study on Antarctic algae reveals that they can survive without vitamin B12, a finding with significant implications for climate change and the carbon cycle. The algae, Phaeocystis antarctica, has a fusion B12-independent methionine synthase protein that enables it to adapt to low B12 availability.
Researchers at Stanford have found that the Wilkes Subglacial Basin in East Antarctica could be closer to runaway melting than previously thought. The study suggests that this region, which holds enough ice to raise global sea levels by over 10 feet, may be vulnerable to irreversible melting if warming seawater gets under the ice sheet.
Ocean Networks Canada is establishing a new Antarctic Ocean observatory in partnership with the Spanish National Research Council. This initiative will provide year-round, near real-time data on ocean conditions, advancing scientific understanding of the Southern Ocean and Antarctic Ocean.
Researchers tracked 87 Adélie penguins using electronic tags, revealing how they interact with sea ice during their long-distance migrations. The study highlights the interconnectedness of species in the Southern Ocean and how climate change may impact Adélie penguin populations.
Scientists tracking Cadman Glacier's rapid retreat highlight the importance of long-term monitoring of Antarctica's polar regions. The glacier's ice shelf thinned due to warmer ocean waters, leading to a 28% increase in ice discharge over 13 months.
A recent study found that the Antarctic ozone hole is not only larger in area but also deeper throughout most of spring. The researchers believe changes in air arriving at the polar vortex above Antarctica are contributing to the growth of the ozone hole, which may be caused by factors beyond just CFCs.
Researchers urge concerted action to mitigate global warming's impact on polar ecosystems, which are both the most-threatened and least-understood areas. The study aims to map all biodiversity in these regions to sustainably manage unique habitats and their ecosystem services.
A team of researchers discovered 27 avian footprints on the southern Australia coast dating back to the Early Cretaceous period. The tracks provide evidence for early avian evolution and suggest a possible migratory route, with some tracks showing similarities to modern-day shorebirds.
Researchers have discovered a potential bottleneck in Adélie penguins' annual cycle, which could be exacerbated as the climate continues to change. The study found that seasonal Antarctic sea ice plays a crucial role in the penguins' molting periods, with low sea ice concentration signaling extended gaps in post-breeding diving activity.
Over 71 of Antarctica's 162 ice shelves have reduced in volume over the past 25 years, with a net release of 7.5 trillion tonnes of meltwater into the oceans. The western side of Antarctica experienced significant ice loss, while the eastern side remained relatively stable.
Research reveals the grounding line of the Ronne Ice Shelf can shift up to 15 km with changing tides, controlling ice stability and potentially accelerating ice melt. This finding highlights the need for improved observations and modeling of tidal processes to predict Antarctica's response to climate change.