Articles tagged with Seawater
A new study finds that freshwater runoff from rivers and shelf sediments are bringing significant quantities of carbon and trace elements into the Arctic Ocean. This increase in nutrients may boost Arctic marine productivity, but also exacerbates climate warming.
New research reveals that up to 93% of North Atlantic Subtropical Mode Water has been lost in the past decade due to ocean warming, weakening its ability to absorb heat and carbon dioxide.
Researchers found high concentrations of microplastic particles in Fram Strait's water column and sediment. The deep sea is a major sink for microscopically small plastic particles, with sediments containing up to 13,000 particles per kilogramme.
A new study reveals frequent disruptions to North Atlantic Deep Water (NADW) stability during warm climate interglacials, contradicting previous notions of relative stability. The high-resolution sediment record suggests that large perturbations in ocean circulation are more easily triggered than previously thought.
A Rutgers University study suggests short-term disruptions of deep ocean circulation occurred during past warm interglacial periods, which may happen again due to climate change. The study found century-long disruptions in the North Atlantic Deep Water formation during four warm interglacial periods within the past 450,000 years.
Researchers suggest that squid use visual communication to establish order in near-darkness, utilizing light-producing organs and shifting skin patterns. The study found supporting evidence for this hypothesis in anatomical studies of captured squid.
Researchers found that groundwater flowing from frozen permafrost carries significant concentrations of carbon and nutrients to Arctic coastal food webs. The discovery suggests a new and potentially important source of fuel for local coastal ecosystems.
A new study by FSU researchers reveals that groundwater flows on top of frozen permafrost are a significant source of dissolved organic matter entering Arctic coastal waters. This ancient carbon is transported to the ocean without decomposition and provides a new food source for local coastal ecosystems.
The Woods Hole Oceanographic Institution has received an $8.3 million grant to extend the life of the Overturning in the Sub-polar North Atlantic Program, a key part of Earth's ocean-climate system. The program provides a high-resolution view of processes that regulate global climate and influence weather in Europe.
A new study links Antarctic sea ice melt to warmer oceans, increased rainfall, and strengthened trade winds in the tropics. The research team found that a 0.5? (0.9?) warming of the surface ocean at the equator would lead to an additional 0.3 millimeters of rain per day.
HKU researchers reconstruct water depth changes in Svalbard using fossil Ostracoda, revealing a sudden temperature rise and abrupt sea-level change due to warm Atlantic waters. The study provides the first solid evidence of MWP-1B's relative sea-level change in ice-proximal areas.
Sea turtles eat ocean plastics due to their smell, which is caused by a coating of algae and microorganisms on the plastic. This can lead to blockages in their digestive systems and even illness.
Researchers developed a new estuary box model to simulate river plumes and outflows, improving ocean model performance. The CMCC EBM model successfully reconstructed river plumes and improved forecast accuracy in the Mediterranean Sea.
The Whillans Subglacial Lake, located in West Antarctica, contains a pool of dissolved organic carbon that can be produced in 4.8 to 11.9 years. This nutrient-rich environment provides essential energy and sources for life in the ice-covered regions of the Southern Ocean.
A new study found that elevated nutrients and modest water temperature increases negatively affect coral larvae's first few days of life. The research revealed that nutrient imbalances can seriously impact coral larvae, but certain larvae types are more resistant to environmental stressors.
Researchers discovered that the ratio of oxygen isotopes in ancient ocean rocks suggests a global ocean covered most of the planet's surface at that time. This finding could help scientists understand how single-cell organisms first emerged on Earth.
Geologists have determined that the early Earth was a 'water world' with submerged continents based on oxygen isotope data from ancient ocean crust in Australia. This finding has significant implications for the origin of life on Earth and its possible existence elsewhere.
The study found that massive flood events in the eastern North Pacific Ocean, known as the Missoula Floods, may have contributed to abrupt climate changes in the Northern Hemisphere. The researchers reconstructed sea surface temperature and salinity patterns using fossil plankton data from marine sediment cores.
A recent expedition led by the University of Western Australia has revealed rich and diverse ecosystems in the cold waters deep within the Bremer Canyon submarine canyons. The team collected deep-sea corals, fauna, seawater, and geological samples, providing a new understanding of these previously unknown ecosystems.
A new method has been proposed to swiftly and accurately detect underground water leaks in transmission mains. By assimilating data from pressure sensors into a mathematical model, the researchers claim faster results with higher accuracy than current methods, reducing computational costs and improving speed.
Scientists investigate microorganisms in the twilight zone of the ocean and find they can degrade recalcitrant organic compounds. The study provides insight into the ocean's carbon cycle and may help predict microbes' role in regulating it.
Researchers have identified key technological and scientific challenges in producing hydrogen through seawater electrolysis. The study highlights the need for new catalysts and electrode materials to overcome competition between chlorine chemistry and water oxidation in seawater.
Researchers found that warmer waters increase the frequency and intensity of snapping shrimp sounds, which could dominate coastal ocean soundscapes. This might impact fish communication, human sonar instruments, and even Navy mine detection systems.
A study published in PNAS reveals that Antarctic sea-ice played a crucial role in past climate transitions, storing extra carbon in the deep ocean and reducing atmospheric CO2 levels. Sea ice formation increases storage of carbon in the deep ocean, leading to a 30 ppm drawdown of atmospheric CO2.
A new international study led by UNSW Sydney reveals that the West Antarctic Ice Sheet melted rapidly during the Last Interglacial period, causing a multi-metre rise in global mean sea levels. The research suggests that the ice sheet is highly sensitive to future ocean warming, posing an urgent need to minimize warming.
NASA measured heavy rainfall around Tropical Storm Uesi's center and in a large band of thunderstorms, triggering warnings for Vanuatu. The heaviest rainfall was falling at 1.2 inches per hour near the center, while a large band of thunderstorms experienced rainfall rates of up to 1 inch per hour.
A new quantum process tomography method based on convex optimization effectively characterizes quantum channels, revealing their true action with high accuracy. The method demonstrates excellent performance in both unitary and non-unitary quantum channels, achieving up to 99.5% accuracy.
A recent study by the University of Colorado Boulder and Rutgers University explores the impact of nuclear war on the world's oceans. The research finds that smoke generated by detonated warheads could shift ocean acidification patterns and rob waters of essential building blocks for organisms like corals.
A new study reveals global ocean circulation has accelerated over the past two decades, with a sharp increase in kinetic energy from 1990s onwards. The acceleration is attributed to intensification of surface winds and a near 2%-per-decade rise in wind speeds.
A novel bacteria effectively removes nitrogen from salty wastewater, suggesting a potential solution for sewage treatment from seawater-based toilets. This finding could help alleviate pressure on freshwater resources as the world's population is expected to grow to 10 billion by 2050.
Researchers discovered a substantial concentration of microplastics in the Delaware Bay, accumulating in hotspots driven by tidal, wind, and buoyancy variations. The study used field sampling and modeling to simulate microplastic distribution and found high concentrations near salinity fronts where surface currents converge.
The robotic underwater vehicle, Icefin, captured unprecedented images of the grounding line, a critical area for Thwaites Glacier's stability. Researchers hope to gain a clearer picture of its condition, as it contributes significantly to global sea-level rise. The data collected will help predict future changes with more certainty.
Scientists have observed record warm water beneath the Thwaites Glacier in Antarctica, which is causing significant melting. The discovery suggests that climate change may be responsible for the glacier's retreat, with potential implications for global sea levels.
Researchers found that upper-ocean stratification is increasing in about 40% of the world's oceans, which could have a negative impact on the marine food chain. The study suggests that global warming may be driving this trend.
Researchers are exploring seawater-based Na-ion batteries as a potential alternative to lithium ion batteries. A new study investigated electrode materials that increase voltage, capacity, and wattage. The development of these batteries could alleviate concerns around cobalt mining and reduce costs.
Researchers used a non-targeted approach to identify 64 previously unknown chemicals in Puget Sound, including pesticides and pharmaceuticals. The team found eight concerning chemicals at potentially hazardous concentrations that require further investigation.
Researchers found that Antarctic Bottom Water, a deep-water mass in the Southern Hemisphere, was disrupted from spreading northwards into the South Atlantic and Indian Oceans during peak ice ages. The study suggests that weaker circulation in the Southern Ocean during cold periods may have interrupted this process.
Researchers have discovered a unique CO2 hotspot in the ocean, with readings of up to 95,000 parts per million. The site, known as Soda Springs, is being studied for its potential to understand how coral reefs cope with climate change.
Researchers argue for mobile marine protected areas in international waters to protect highly mobile species affected by climate change. New technologies, such as satellite tracking, enable dynamic management strategies that adjust to species' movements and habitats shifts.
Scientists found that seasonal temperature variations in the Arctic Ocean significantly impact methane emissions, with a 43% decrease in colder conditions. This study corrected existing estimates in the methane emissions budget, highlighting the importance of considering seasonal changes in biogeochemical processes.
A new analysis shows the world's oceans were the warmest in 2019 than any other time in recorded human history. The study reveals that the past ten years have been the warmest on record for global ocean temperatures, with significant consequences for marine life and extreme weather events.
Research on puffadder shysharks reveals that ocean acidification damages up to 25% of their denticles, limiting their swimming ability. The study also found that sharks have an acid-base regulatory mechanism to adapt to environmental conditions.
Researchers analyzed 101 monthly stream and tide gauge records to estimate variations in relative water level in the Ganges-Brahmaputra-Meghna delta from 1968 to 2012. The study found RWL increased by approximately 3mm/year, similar to global mean sea-level increase, leading to estimated maximum land subsidence rates of 1-7mm/year.
Scientists provided reliable regional estimates of land subsidence and water-level rise in the Ganges-Brahmaputra-Meghna delta, projecting 85-140cm rise by 2100. The delta's 200 million inhabitants face significant flooding risks due to climate change, intense monsoon rainfall, rising sea levels, and land subsidence.
Research reveals Pacific Ocean infiltration into the Southern Ocean around 6,000-7,000 years ago, possibly due to weakened westerly winds. This finding may signal potential impacts of climate change on the region.
Researchers found that changes in deep-water circulation occurred around 7,000 years ago, influencing CO2 levels in the atmosphere. This discovery highlights the importance of studying past climate change and suggests future climate change could lead to increased CO2 release from Southern Ocean.
A team of mathematicians has discovered a new phenomenon that generates a fluidic force capable of moving and binding particles immersed in density-layered fluids. This breakthrough offers an alternative to previously held assumptions about particle accumulation in lakes and oceans.
A study published in Scientific Reports suggests that prolonged exposure to high carbon dioxide seawater may corrode tooth-like scales covering the skin of puffadder shysharks. The research found that 25% of denticles were damaged in acidified water, compared to 9.2% in a control group.
Researchers at Cornell University have discovered a new ice river forming on the Vavilov ice cap in Siberia, shedding nearly 11% of its mass since 2013. The rapid ice loss is believed to be linked to climate change, which can cause unstable ice shelves and erosion by warm water.
Researchers from University of Maryland provide rigorous mathematical explanation for Batchelor's law, a fundamental concept in fluid mechanics. The proof resolves the uncertainty surrounding the law's applicability and limitations, opening doors to better engineering designs and weather prediction models.
An ice-free Arctic region could lead to increased global warming, but also offer benefits like reduced shipping distances and heating demands. IIASA researchers propose strategies to increase the North Atlantic current, which could lower ocean temperatures and mitigate climate change.
A new European research project, HOTMIC, aims to investigate the fate of microplastic in the North Atlantic Ocean. The study's lead researcher suggests that microplastic particles may be transported by microorganisms or marine animals, which could have a significant impact on the marine ecosystem.
The study investigates the physical forces acting on Enceladus that allow the tiger stripe fissures to form and remain in place. The researchers found that the fissures could have formed on either pole, but the south pole's unique deformation led to their formation.
Researchers used computer simulations to investigate wind and water conditions that cause Kemp's ridley sea turtles to become stranded on beaches in Cape Cod. The study found that turtles are more likely to strand when water temperatures drop below 10.5°C and winds blow with high wind stress.
The Bulwer's petrel can fly up to 1,800 kilometers from the Canary archipelago to the Azores in search of food. The new study provides the most comprehensive scientific data on the species' space ecology, diet and daily/annual movement patterns.
An international team of scientists analyzed 3 million species records from 200 ecological communities worldwide to reveal the impact of ocean warming on fish communities. The study found that subtle changes in species movement in response to rising temperatures made a significant impact on the global picture.
Marine researchers investigated adaptability of marine organisms to highly acidified seawater after earthquake and typhoon hit a volcanic island. Organisms were able to adapt to changes in biogeochemistry, providing insights into effects of ocean acidification on marine communities.
Researchers have developed a new oxygen evolution reaction catalyst that can produce hydrogen from seawater at current densities capable of supporting industrial demands. The catalyst requires relatively low voltage to start seawater electrolysis and avoids obstacles that limited earlier attempts.
Tropical Storm Matmo is located in the center of the Bay of Bengal with maximum sustained winds near 63 mph. The storm will strengthen to 85 knots but weaken rapidly before making landfall just east of Kolkata on Nov. 9.
A UCL-led research team has successfully created self-assembling protocells in hot, alkaline seawater, a key stepping stone to cell-based life. The study suggests that heat and alkalinity are necessary for the formation of life, adding weight to the theory that deep-sea hydrothermal vents could be the origin of life.