Seawater

Scientists identify hidden accelerant in Antarctic ice loss

Study provides detailed assessment of shifts in toxin producing phytoplankton abundance

Enhancing the selective OH− adsorption for durable alkaline seawater oxidation at industrial current densities

Scientists have developed a novel catalyst that selectively repels chloride ions while accelerating oxygen evolution in alkaline seawater electrolysis. The optimized NiFe-LDH/Ce(OH)CO3 system delivers exceptional catalytic metrics and achieves energy efficiency of 68.59% at 500 mA cm-2.

Tiny particles in Arctic ponds may play role in cloud formation, climate change

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.

How can science support and enable the High Seas Treaty?

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.

The giant fire tornado that could save our oceans

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.

Hereon Press Release: Offshore wind farms change current patterns

A new study reveals that offshore wind farms can create complex wake structures that interact with each other, affecting surface currents and sediment transport. The research suggests that turbines spaced farther apart can reduce turbulence caused by tidal wakes, leading to optimized wind farm designs.

New review highlights electrochemical pathways to recover uranium from wastewater and seawater

Researchers systematically analyze recent advances in electrochemical strategies designed to extract uranyl from complex aqueous environments. Electro-adsorption, electrocatalysis, and photo-electrocatalysis approaches offer a potentially energy-efficient alternative to traditional chemical separation methods.

Engineers develop real-time membrane imaging for sustainable water filtration

Researchers at CU Boulder have introduced a solution to improving desalination plant performance by observing in real-time membrane fouling using SRS. The technique helps maximize filtration efficiency and reduce energy use, making it crucial for ensuring global access to clean water.

Expansion of Antarctic bottom water contributed to the end of the last Ice Age

A new study published in Nature Geoscience shows the key role of Antarctic Bottom Water in the transition from the last Ice Age. The expansion of AABW played a central role in releasing carbon dioxide into the atmosphere, which helped reduce atmospheric CO2 concentrations.

Breakthrough material advances uranium extraction from seawater, paving the way for sustainable nuclear energy

Researchers create a new material that dramatically boosts uranium extraction efficiency, addressing one of the key challenges in sustainable nuclear energy. The study introduces a special type of covalent organic framework (COF) that shows record-high efficiency and selectivity in isolating uranium from seawater.

Harnessing seawater ions to power next-generation seawater electrocatalysis

Researchers have discovered that certain seawater ions can be intentionally utilized to enhance electrochemical performance, rather than hindering it. This involves carefully designing catalysts and electrolytes to mitigate the negative effects of these ions while maximizing their benefits.

Study provides new forecasts of remote islands’ vulnerability to sea level rise

A new study has analyzed a rare flooding event in the Maldives in July 2022 and found it could become a far more common occurrence in the future. By 2050, predicted rises in sea levels, coupled with increased extreme weather events, may result in such flooding happening every two to three years.

Sunlight turns everyday fabrics into ocean microfibers, new study finds

Researchers found that sunlight can transform synthetic fabrics into tiny plastic fibers, releasing thousands of microscopic fragments. The study shows that fabric color and dye chemistry significantly impact microfiber generation, highlighting the need for sustainable textile design.

Artificial ocean carbon recycling system converts seawater CO2 into valuable chemicals

A team developed an artificial ocean carbon recycling system that captures CO2 from seawater and directly converts it into succinic acid, achieving a carbon capture efficiency of 70%. The system's cost is competitive with existing state-of-the-art technologies.

Sodium-ion battery breakthrough could power greener energy – and even make seawater drinkable

Scientists at the University of Surrey have discovered a simple way to boost sodium-ion battery performance by leaving water in key component. The new material, nanostructured sodium vanadate hydrate, showed significant improvements in charge storage, charging speed, and stability, even in saltwater.

Surprising bacteria discovery links Hawaiʻi’s groundwater to the ocean

Researchers at University of Hawaiʻi at Mānoa identified Caulobacter inopinatus, a previously unknown species found in seawater collected near Oʻahu's south shore. The discovery highlights the connection between land and sea ecosystems through microbial exchanges.

North American ice sheets drove dramatic sea-level rise at the end of the last ice age

A study published in Nature Geoscience found that North American ice sheets caused over 30 feet of global sea-level rise between 8,000 and 9,000 years ago. This discovery challenges decades of research and has significant implications for understanding climate change.

Chung-Ang University develops chloride-resistant Ru nanocatalysts for sustainable hydrogen production from seawater

Researchers developed chloride-resistant Ru nanocatalysts to overcome limitations in seawater electrolysis. The g-C3N4-mediated pyrolysis strategy creates a crystalline-amorphous junction with ultrafine Ru dispersion, enabling efficient and durable hydrogen production.

PolyU researchers use novel satellite laser ranging technique to reveal accelerated global average sea-level rise with 90 mm surge over past 30 years

Researchers at PolyU have developed a novel technique to measure global ocean mass change, revealing a 90 mm surge in sea-level rise over the past 30 years. The study attributes this acceleration to increased ocean mass and land ice melt, particularly in Greenland.

Sea-level projections from the 1990s were spot on, Tulane study says

A new study published in Earth's Future journal reveals that sea-level projections from the 1990s were remarkably accurate, with global sea-level rise averaging about one eighth of an inch per year. The researchers compared these projections with recent satellite measurements and found a remarkable match.

Ocean anomalies traveling North crucial for the Atlantic Meridional Overturning Circulation

Researchers found that ocean anomalies traveling northward affect the Atlantic Meridional Overturning Circulation in the Nordic Seas, controlling its strength. The study suggests that these anomalies can be monitored using satellite data, providing a cost-effective way to track climate changes.

Highest solar-to-hydrogen conversion efficiency in Cu2ZnSnS4 photocathodes and its directly unbiased solar seawater splitting

Researchers have introduced a new method to overcome defect limitations and enhance the performance of CZTS photocathodes, delivering a record half-cell solar-to-hydrogen efficiency of 9.91% in natural seawater. The device also sustains high photocurrent and exhibits corrosion resistance against chloride ions and dissolved oxygen.

Are sewage spills and coastal winds contributing to airborne microplastics?

Researchers found that sewage spills from land to sea coincided with winds of at least 6.5m/s on 178 days within a two-year period, potentially sending microplastics into the air. The study suggests that coastal towns and cities may be exposed to billions of airborne microplastic particles.

Rain events could cause major failure of Waikīkī storm drainage by 2050

A study published in Scientific Reports found that large rain events combined with sea level rise could cause severe flooding across 70% of Waikīkī, contaminating stormwater inlets and disrupting transportation. By 2050, the entire Waikīkī storm drainage system is expected to fail, posing a health hazard from contaminated water.

Silent witnesses: corals pinpoint the start of deforestation in Borneo

University of Leicester researchers analyzed coral cores to spot the start of industrial deforestation in Malaysian rainforest and its impact on coastal ecosystems. The study found that sediment concentrations remained low before 1950, but increased after, indicating enhanced soil erosion due to deforestation.

Tiny ocean migrants play a massive role in Southern Ocean carbon storage

A groundbreaking study reveals that small zooplankton like copepods and krill enhance carbon sequestration through seasonal migrations. These tiny creatures store around 65 million tonnes of carbon annually in the deep ocean.

USC technology may reduce shipping emissions by half

A USC-developed shipboard system using limestone and seawater can remove up to half of carbon dioxide emitted from shipping vessels, cutting maritime CO2 emissions by 50%. The process mimics a natural chemical reaction in the ocean, where CO2 is absorbed into water pumped onboard and then neutralized through a bed of limestone.

New study explains why your skin feels tight at the beach

Researchers from Binghamton University confirm the long-held 'urban myth' that saltwater dries out skin, increasing tissue stiffness and stress. A simple solution to alleviate tightness is taking a shower after coming out of the ocean.

Island rivers carve passageways through coral reefs

Research shows that island rivers shape reef passes, allowing seawater and nutrients to flow in and out. The locations of reef passes align with where rivers funnel out from an island's coast, providing circulation throughout the reef.

Sea ice plays important role in variability of carbon uptake by Southern Ocean

Longer winter sea ice duration is associated with a 20% increase in atmospheric CO2 absorption by the Southern Ocean. Sea ice protects the ocean from strong winds, allowing it to absorb more CO2 during winter.

Is the ocean getting darker?

The global ocean has experienced a significant reduction in the depth of its photic zones, home to 90% of all marine life, leading to widespread ocean darkening. This change could have profound implications for the planet's marine species and ecosystem services.

Artificial oxygen supply in coastal waters: A hope with risks

Researchers warn that artificial oxygen input cannot replace comprehensive water protection strategies. Technical approaches have shown promise, but risks include intensifying greenhouse gases and disrupting marine habitats. Climate protection and reducing nutrient inputs remain crucial for mitigating ocean oxygen loss.

The all-female Korean Haenyeo divers show genetic adaptions to cold water diving

A recent study on the Haenyeo divers from Korea found that they have distinct genetic adaptations, including gene variants associated with cold tolerance and decreased blood pressure. The researchers also discovered two unique gene variants in the Haenyeo population that may help them cope with the pressures of diving.

Hard-to-avoid emissions: Limited potential for marine carbon dioxide removal in Germany’s seas

A new study finds that ocean-based carbon dioxide removal (CDR) and storage in German waters is feasible but with limitations, such as local marine conditions and required materials, energy, and infrastructure. Only five methods were shortlisted for implementation in German North Sea and Baltic waters.

Trawling-induced sediment resuspension reduces CO2 uptake

A study found that sediment resuspension triggered by trawling and natural processes releases significant amounts of CO2 into the atmosphere through pyrite oxidation. The research reveals that protecting sensitive seafloor areas with fine-grained sediments is crucial to maintain the region's carbon sink capacity.

Genetic engineering drives innovative material design for enhanced uranium extraction from seawater

Researchers developed a novel protein, LSUBP, to enhance uranium extraction from seawater. The engineered protein achieves high adsorption capacity, offering a promising new material for effective uranium extraction.

Explainable AI for ship navigation raises trust, decreases human error

Researchers from Osaka Metropolitan University developed an explainable AI model for ship navigation that explains the basis for its decisions and intentions using numerical values. This technology aims to increase trust among maritime workers and contribute to the realization of unmanned ships.

UH researcher unveils new model to evaluate impact of extreme events and natural hazards

A new numerical computer model tracks how pollution travels through Galveston Bay, helping scientists understand water movement in estuaries. The model is critical for evaluating climate variability and sea level fluctuation impacts on coastal communities, guiding better decisions to keep water clean and prevent flooding.

Hundred-year storm tides will occur every few decades in Bangladesh, scientists report

A new study by MIT scientists finds that extreme storm tides will increase tenfold for Bangladesh, with what was once a 100-year event now striking every 10 years by the end of the century. The country's densely populated coastal regions are expected to experience more frequent and severe flooding events as a result.

With new database researchers may be able to predict rare milky seas bioluminescent, glowing event

A new database of 400 years of sightings compiled by researchers at Colorado State University may help anticipate when and where milky seas will occur. The archive includes eyewitness reports, satellite data, and individual accounts submitted to the Marine Observer Journal.

Potable water happy byproduct of low-cost green hydrogen technology

A Cornell University-led collaboration has developed a low-cost method to produce carbon-free 'green' hydrogen via solar-powered electrolysis of seawater. The process produces 200 milliliters of hydrogen per hour with 12.6% energy efficiency directly from seawater under natural sunlight.

Revealing long-term changes in the marine environment and ecosystems of the Southern Ocean

A multidisciplinary survey in the eastern Indian sector of the Southern Ocean found that the southern boundary of the Antarctic Circumpolar Current has shifted southward, causing a change in water temperature and mac zooplankton composition. The survey also estimated the biomass of Antarctic krill in the area, with comparable results t...

New computer model reveals how Bronze Age Scandinavians could have crossed the sea

A new computer modeling tool suggests that Bronze Age people may have traveled directly over the open ocean between Denmark and Norway. The simulations indicate that such trips were possible, but required a boat with specific capabilities and good weather forecasting.

Microplastics pollution from glitter can disrupt marine biomineralisation

PET-based glitter microplastics promote calcium carbonate crystallisation in seawater, altering natural biomineralisation processes in marine organisms. The study's findings suggest that glitter microplastics can degrade rapidly, releasing smaller fragments that are easily ingested by marine life.

Enhanced westerly winds lead to increased ocean heat transport to the East Antarctic Ice Sheet

Research finds that strengthened westerly winds enhance clockwise oceanic circulations, transporting warm seawater and causing accelerated ice sheet melting in East Antarctica. This study's findings improve future sea level rise projections.

Cleaning microplastics

Researchers at North Carolina State University have developed a system that actively removes microplastics from water in a single cycle. The microcleaners, made from biodegradable materials, use the Marangoni effect to self-disperse and capture microplastics, which are then collected by skimming.

Researchers develop biomimetic adsorbent to efficiently extract uranium from seawater

Researchers developed a biomimetic adsorbent inspired by the natural porous structure of the Chinese sweet gum tree's fruit. The hierarchical nano-trap framework significantly enhanced ion diffusion and increased uranium adsorption capacity, outperforming competitive ions in real seawater tests.

New study reveals shift in subtropical North Atlantic Ocean over the next decade

A new study analyzes nearly four decades of deep ocean observations to reveal significant cooling and freshening of deep water in the Subtropical North Atlantic. The results suggest that warmer, saltier deep waters may reach the region within the next decade, potentially influencing large-scale sea level changes.

Were our blue oceans once green?

Research suggests the Earth's oceans were green 2.4 billion years ago due to iron precipitation, leading to a new understanding of ancient photosynthetic organisms and their potential for life beyond Earth. The discovery could aid in the search for extraterrestrial life by identifying green oceans as a possible indicator.

Snapshot of Antarctica’s past helps predict future climate

Researchers studied Aurora Subglacial Basin's subglacial hydrology, finding dynamic rivers that change over time. This new insight may alter predictions of rising sea levels and the role of subglacial water in ice dynamics.

5,700-year storm archive shows rise in tropical storms and hurricanes in the Caribbean

A 30-meter sediment core from the Great Blue Hole in Belize provides the longest recorded storm frequency data for the Atlantic, with 574 storm events over 5,700 years. The research reveals a steady increase in tropical storms and hurricanes in the southwestern Caribbean due to climate change.

Mere whiff of penguin poo pushes krill to take frantic evasive action

Antarctic krill exhibit sudden changes in behavior when exposed to the water-borne smell of penguin poo, showing increased speed, turns, and reduced foraging efficiency. This 'zigzagging' is an avoidance reaction that may increase their odds of survival in a swarm.

New carbon-negative material could make concrete and cement more sustainable

Researchers at Northwestern University have developed a new carbon-negative building material that can be used to manufacture concrete, cement, plaster, and paint. By converting CO2 into solid, durable materials using electricity and seawater, the material not only stores CO2 but also produces clean hydrogen gas.

Researchers optimize a method using seawater that produces mineral deposits while trapping carbon dioxide

Researchers have optimized an electrochemical method called seawater splitting to trap and sequester carbon dioxide into stable solid mineral deposits. The method allows for maximal mineral yield with minimal energy use, making it a promising pathway for transforming carbon dioxide into useful substances.

Wild weather linked to weedy seadragon deaths

A recent study found that intense east coast low storms and marine heatwaves caused the deaths of over 200 weedy seadragons on Sydney beaches. The extreme weather triggered record-breaking waves and rainfall, which seadragons struggle to handle.

Pacific island water security requires new approach

Experts at Flinders University are calling for a new approach to water security on Pacific islands, where rising sea levels threaten local water supplies. Infiltration galleries, which extract fresh groundwater from shallow depths, may provide a solution, but more research is needed on their optimal design and performance.

Supramolecular organic framework for iodine capture from seawater

A team at Hainan University has developed a supramolecular organic framework for efficient iodine capture from seawater, removing 79% of iodine pollution in simulated contaminated environments. The material achieves an ultrahigh iodine adsorption capacity of 46 mg g−1 within a 20-day extraction period.

Giant clone of seaweed in the Baltic Sea

The discovery challenges our understanding of seaweed in a changing ocean and has implications for predicting its future. The giant clone, found to be a single species with millions of individuals, thrives in low-salinity waters and provides habitat for various marine life.

Sea water purification technique outperforms commonly used materials, even activated carbon

Researchers at Nagoya University developed a new technique to improve electrode performance in seawater purification, allowing for higher surface area and increased efficiency. The oxygen-doped electrodes show promise for reducing water purification costs and expanding applications beyond water treatment.