Articles tagged with Oceans
Researchers investigated adding iron to the ocean to boost CO2 removal, finding varying effects on marine ecosystems. The Southern Ocean offers a favorable balance of climate impact and ecological consequences, while other regions face more severe consequences.
Researchers from Utrecht University found that the Atlantic Meridional Overturning Circulation's (AMOC) stability depends on how fast the climate is changing. Slow warming allows the ocean to adapt, while fast warming triggers a collapse around +2°C of warming.
New research highlights the hidden threats of marine heatwaves on human health, including psychological impacts, respiratory problems, and eco-anxiety. The study calls for governments and public health agencies to treat marine heatwaves as a major public health issue.
Researchers found specific song themes tied to specific parts of a dive, revealing insights into how singing affects energy use, oxygen management and vulnerability. The study's findings offer practical applications for tracking whale populations and establishing a clearer baseline for normal humpback behavior.
Scientists used chemical clues in microscopic fossils to find evidence that ocean acidification caused one of the largest extinction events in planktic foraminifera history. The study suggests that volcanic eruptions and rising CO2 levels led to a decrease in shell-building ability, ultimately contributing to the extinction.
A new digital mapping project has created a comprehensive dataset to safeguard UNESCO World Heritage sites along coastlines at risk of flooding and erosion. The Global Coastal Heritage (Glo-CoH) dataset includes 1250 individual heritage sites, spanning over 235 million hectares across the globe.
New analysis reveals Arctic winter sea ice coverage declined significantly due to record lows in 2025 and 2026, reversing a brief slowdown. The study suggests that Arctic winter sea ice loss is continuing in a warming climate.
Scientists use commercially available surfing webcams to measure Oregon's coastal fog, revealing patchy fog patterns along 93 miles of coastline. The study found that airport measurements were a good indication of average monthly fog frequency, but surface weather conditions at the airport were not sufficient for real-time fog detection.
Researchers found that as salinity increases in freshwater environments, microbial communities lose diversity due to faster-growing strains taking over, but maintain overall growth rates. This effect is also observed in natural ecosystems across different environments.
Researchers found that tiny, invisible swirls in the deep ocean shape significant climate forces like sea level rise and fisheries collapse. Climate models require significant improvements to accurately predict these effects.
A new study reveals that microplastics in the air can trap heat, making them a previously unknown contributor to climate change. Researchers found that colored microplastics absorb roughly 16% as much heat as black carbon, with an effect equivalent to running 200 coal-fired power plants annually.
Declining plankton abundance across the North East Atlantic poses a significant threat to ocean health, impacting marine food webs and carbon cycling. The study found six pelagic habitat-region combinations rated as 'Not Good' and three as 'Uncertain', highlighting the need for climate change mitigation and reduced nutrient pollution.
The 'Hess Evolution' expedition aims to uncover the origin and age of Hess Rise, a vast volcanic plateau. Researchers will analyze rock samples collected from depths of up to 6,000 meters to determine if they reveal systematic age patterns across the plateau.
Researchers propose a thermochemical mantle plume formation process for the Ontong Java Plateau, contradicting previous hypotheses. The model explains spatial variations in crustal thickness and lava composition across the plateau.
A new underwater mapping technique, Sonar-MASt3R, combines sonar and visual data to generate detailed 3D maps of environments in real-time. The system enables vehicles to navigate through cloudy water by quickly mapping the general shape of their surroundings using sonar.
A new study by Tulane University researcher Sönke Dangendorf found that human-caused sea-level rise has significantly increased the frequency of extreme coastal flooding worldwide. Coastal flooding events expected once every 100 years now occur on average about 12 times more likely to occur globally.
A new study has analyzed over 2100 samples to build a genetic dataset containing more than 500 million unique genes, revealing the immense potential of deep-sea biodiversity for developing new technologies. The research found that despite vast genetic diversity, deep-sea organisms rely on stable, core designs to survive extreme conditi...
Researchers used the Hybrid Coordinate Ocean Model to predict internal tide sea-surface height signatures and improve SWOT satellite observations of small-scale ocean eddies. The new approach accounts for 60% more internal tide signal, yielding a clearer picture of these important ocean patterns.
A recent study found that Caribbean reef sharks prefer locations with dense prey populations, making food abundance an essential factor in their habitat choice. The research suggests that prey conservation should be considered alongside fishing bans to support shark conservation.
SwRI has introduced a new 30-inch diameter pressure vessel, enabling faster testing of larger equipment at extreme ocean depths. The vessel can test equipment up to 16,500 psig, simulating the pressures in the deepest parts of the ocean, and features a novel quick-acting closure system.
Scientists discovered that oxygen levels in shallow oceans declined about 8 million years before the end-Triassic mass extinction, stressing marine ecosystems. The research provides a rough guide for the future as our oceans undergo acidification and deoxygenation.
A study found that scuba diving tourism causes frequent and often hidden damage to coral reefs, with most damage being unintentional or unnoticed. The research identifies factors such as underwater camera use, gloves, and peer behavior that contribute to reef damage.
A new study by international researchers suggests that massive Atlantic seaweed blooms could be harnessed for climate solutions such as marine carbon dioxide removal and biofuel production. The vast blooms of Sargassum are not only likely to persist, but may be predictable, with predictive capability reducing uncertainty about the futu...
Rising ocean temperatures cause corals to struggle with oxygen uptake due to disrupted ciliary motion. At moderate temperatures, corals accelerate ciliary motion to meet increased oxygen demand, but this compensatory mechanism fails at higher temperatures.
A global study of marine litter has identified food and beverage plastics as the leading contributors to ocean pollution, with plastic packaging, caps, and bottles dominating shoreline debris worldwide. The research highlights the urgent need for reduced plastic production and more efficient waste management practices.
The SO320/1 expedition aims to investigate the formation of the 1,000km-long Hess Rise plateau using various models and multiple research instruments. The team will test three scenarios for its formation and collect rock samples from the seafloor for further analysis.
A new study led by University of Maryland scientist Madeleine Youngs reveals that meltwater flowing off ice shelves changes the ocean's circulation patterns, driving even faster melting. This self-reinforcing chain reaction contributes as much to rising sea levels as direct atmospheric warming.
A study has mapped changes in the distributions of two phytoplankton groups, Pseudo-nitzschia and Dinophysis, which produce toxins that can harm human health and marine ecosystems. The research reveals significant shifts over six decades, with changes aligned more closely with climate-driven ocean physical shifts.
A new study reveals that even the most remote corners of the ocean are contaminated with zinc from human sources, surpassing natural zinc levels. Zinc from fossil fuel combustion and industrial emissions dominates the upper layer of the South Pacific, posing a potential threat to marine life and nutrient balances.
A study by ICTA-UAB reveals that the West African coast is a primary source of microlitter in the South Atlantic Ocean, with particles transported by equatorial currents to remote areas. The research highlights the need for global action to address this environmental issue.
A new study finds that water masses from the Southern Hemisphere have been a major contributor to the Indonesian Throughflow for over 800,000 years. The researchers measured nitrogen isotopes in sediment cores and found a remarkable long-term stability of the nitrogen cycle along the equatorial Pacific.
A new study explores potential options for Venice to adapt to sea-level rise, including relocating the city, movable barriers, ring dikes, and closing the Venetian Lagoon. The research suggests that no single approach is optimal, requiring a balance of factors such as resident wellbeing, economic prosperity, and cultural heritage.
A new study introduces Map the Giants, a pioneering citizen-science initiative to document giant coral colonies before they disappear due to global pressures. The project aims to unlock genetic secrets and traits of resilient corals, providing a validated sampling frame for future research.
Researchers from Colorado State University found that tiny particles bubbling up from melting sea ice in the Arctic sky can create clouds, providing a platform for water vapor to freeze onto. This discovery sheds light on why Arctic clouds behave differently and could help improve weather modeling and climate change predictions.
The study clarifies the typical characteristics and driving factors of Oxygen Minimum Zones (OMZ) in the global ocean, highlighting the role of temperature, ocean circulation, and other factors. The researchers also propose establishing OMZ gradient thresholds for better understanding and management.
A new study published in Biodiversity Data Journal reveals a profound look at life up to nearly 10 kilometers below the ocean's surface in the Japan, Ryukyu, and Izu-Ogasawara trenches. The research catalogs at least 108 distinct organism groups, including a baffling unidentified animal that has left global taxonomic experts stumped.
The partnership aims to boost conservation impact by harnessing advanced digital technology and biobanking techniques, focusing on three core areas: knowledge transfer, innovation, and student engagement. This collaboration seeks to address pressing environmental challenges such as biodiversity threats and emerging pathogens.
A new study provides a solutions-focused pathway to implementing the High Seas Treaty, highlighting the need for enhanced data resources and sharing. The researchers identify major scientific and technical developments that can help address challenges in biodiversity monitoring and connectivity between areas.
A new study suggests that climate change will shift the balance of macromolecules in phytoplankton from proteins to carbohydrates and lipids, with a 20% increase expected by 2100. This could lead to an unbalanced diet for marine life, with implications for ocean health and human consumption.
Researchers tracked movement, acceleration, depth, and water temperature for nine hammerheads in Florida and the Bahamas waters. They found great hammerheads can effectively hunt fast-moving prey like blacktip sharks in winter and tarpon in summer, suggesting they may tolerate changing climates better than other species.
A global analysis of over 2,300 seawater samples reveals human-made chemicals make up a significant portion of organic matter in coastal oceans. Industrial chemicals, including plastics and consumer products, dominate the anthropogenic chemical signal, persisting even 20 kilometers offshore.
Researchers have completed the most comprehensive survey of DNA associated with plankton in the Southern Ocean, revealing a vast genetic diversity that affects the carbon cycle. The study sheds light on the role of microbial ecosystems in climate change and highlights the need to understand how these genes control ocean chemistry.
A Rutgers researcher finds bacteria accelerate calcium carbonate dissolution in shallow seas, potentially slowing carbon sequestration and influencing climate change. The discovery sheds light on the ocean's biological carbon pump and its future implications.
A new study finds hitchhiking bacteria dissolve essential ballast in ubiquitous
In 2025, global unprovoked shark bites returned to near-average levels, with a significant decrease in the United States. The country accounted for 38% of worldwide incidents, down from over 50% in recent years. Australia followed closely, with 32% of global bites and 56% of fatalities.
Researchers on M217/1 expedition study upwelling system and extreme events off southwest African coast, focusing on Coastal Kelvin waves and Benguela Niños. Key findings include the seasonal upwelling without wind off Angola and the causes of marine heatwaves that disrupt marine ecosystems.
Researchers have developed a new method for cleaning oil spills using massive fire whirls, which can burn through crude oil nearly twice as fast as in-situ fire pools. The results show that fire whirls produce 40% less soot and consume up to 95% of the fuel, leaving fewer harmful particles behind.
A new study by Tokyo University of Science found that floods are the biggest drivers of plastic pollution in rivers, increasing microplastic and mesoplastic concentrations by orders of magnitude. The research highlights the need to include high-flow events when assessing plastic emissions.
A field-deployable CRISPR-based biosensing platform has been developed for rapid, on-site monitoring of marine species and ecosystems, offering a sustainable solution for tracking ocean health. The technology has the potential to detect critical species, predict outbreaks, and support early warning systems for ecosystem disruptions.
A third of fish off Pacific Islands' coasts contain microplastics, with Fiji showing a high rate of contamination. Research highlights the pervasiveness of microplastic pollution and its impact on ecosystems and human health.
Research reveals that ancient tropical oceans had the highest oxygen concentrations during the Proterozoic Eon, driven by photosynthetic organisms producing oxygen. The study suggests that a critical threshold of atmospheric oxygen led to a shift in ocean biogeochemistry, fundamentally reorganizing oxygen distribution.
New research reveals that North Atlantic Deep Water (NADW) was only about 1.8°C colder than today during the Last Glacial Maximum, contradicting previous assumptions of near-freezing conditions. The study supports climate model projections and suggests that weakening AMOC could have dramatic consequences for future climate.
A £3.7 million project aims to provide unprecedented analysis of mesophotic coral reefs' vulnerability to climate change and identify ways to protect them. The study will use state-of-the-art technologies to collect comprehensive data on biodiversity, health, and environmental parameters.
The North Atlantic's ocean ventilation has weakened, with water masses aging significantly faster than 30 years ago. This decline in ventilation indicates a slower renewal of deep waters and reduced oxygen transport to depths, potentially impacting marine ecosystems.
A USF-led study using AI shows a significant increase in macroalgae growth globally, with blooms expanding across the tropical Atlantic and western Pacific. The study attributes this shift to climate variability and human activities such as nutrient runoff.
A recent study found that nearly every major river delta is experiencing subsidence, with at least some portion sinking faster than the sea level in 18 of the 40 deltas examined. This phenomenon poses a significant threat to the lives of over 236 million people, particularly in regions such as the Mekong and Nile river systems.
Researchers found that some phage-resistant mutations enhance bacteria's ability to sink carbon, while others slow down growth rates. The study suggests that the selection of surface mutants may play a key role in marine biological pump and carbon export.
A Harvard-designed bio-logger captures high-fidelity audio of sperm whale codas, which are later analyzed by machine learning models to uncover structured communication. Recent results show that sperm whales have their own alphabet and use vowels and diphthongs in their language.
Scientists at the University of East Anglia used an autonomous underwater vehicle to survey beneath the Dotson Ice Shelf, finding that the shape of the seabed is more important than current speed in influencing warm water circulation. This leads to melting at the underside of the ice shelf, contributing to sea level rise.
A new study by the University of Oxford and WCS reveals that connections between coral reefs can stabilize reef health, reducing the risk of collapse. By simulating future reef conditions under different management scenarios, researchers found that a dual approach improving land and sea conditions provides the best outcomes for reefs.