Articles tagged with Ocean Currents
Recent measurements reveal a surprise increase in dense water sinking near Antarctica, following 50 years of decline. Changes in bottom water formation can impact global climate and deep ocean ecosystems. The study documents an increase in supply of bottom water to the Indian and Pacific Oceans.
Researchers develop a strain sensor that can detect small changes in muscle movement through clothing, demonstrating its high sensitivity. The sensor's resilience allows it to withstand repeated exposure to harsh conditions like being stabbed with a scalpel or run over by a car.
Researchers propose adding altitude-measuring instruments to existing NOAA buoys to track global sea levels and monitor accelerating sea-rise rates. This approach will provide valuable insights into the effects of climate change on coastal areas.
The discovery confirms that African crocodiles of the genus Crocodylus inhabited Europe during the late Miocene, with fossils found in Italy and Spain. The remains suggest a dispersal from Africa to Europe via sea, supported by modern crocodile behavior and anatomical similarities with other extinct species.
Researchers have found a decline in sea turtle sightings off the coasts of the UK and Ireland over the past few decades. The study suggests that factors such as climate change, prey availability, and environmental disasters may be influencing this trend.
Extracellular vesicles (EVs) derived from endothelial cells have been shown to revive heart cells after a heart attack and keep them functioning while deprived of oxygen. The researchers demonstrated this functionality in human tissue using a heart-on-a-chip model.
Researchers found a warming trend in the deep sea, with temperature fluctuations detectable at depths of up to 4,757 meters. The increase in temperatures is consistent with global climate change, but more research is needed to understand its causes.
A study using GPS-enabled decoy sea turtle eggs gathered evidence of the illegal trade and tracked eggs from beaches to restaurants and bars in Central America. The findings suggest that most stolen eggs remain in local areas, making it crucial to target conservation efforts towards local communities.
Research reveals that two groups of marine organisms, sea butterflies and sea angels, have survived dramatic global climate change and Earth's most recent mass extinction event. The study found that these pteropods evolved in the early Cretaceous period and likely survived previous episodes of ocean acidification.
Researchers investigate marine heatwaves and their effects on regional ocean circulation, marine life, and fisheries. They found that extreme warming events can extend to 300 meters below the surface in certain areas, impacting ecosystems and economies.
Hurricane Teddy generated up to 30 mm of rain per hour on its western side, with heavier rainfall expected near Bermuda. The storm is moving northwestward, increasing the risk of strong winds, storm surge, and heavy rainfall.
A Rutgers-led study finds that 80% of bottom-dwelling invertebrates have disappeared from Georges Bank due to warming-induced changes in spawning times. Ocean warming causes these creatures to spawn earlier, exposing larvae to stronger winds and water currents that push them toward warmer waters.
After a century of being ignored by scientists, the Black sea spider crab has been re-described by a research team led by Dr Vassily Spiridonov. The team analyzed molecular genetic barcode data to confirm that Macropodia czernjawskii is a distinct species with epibiosis, including a non-indigenous red alga species found in its epibiosis.
Researchers used high-resolution models to predict where marine heatwaves will occur and intensify, revealing stark regional variability. The study found intense heatwaves more likely off Tasmania's coast and along the US Gulf Stream's shoreline.
Researchers found that climate change and coastal development will reduce suitable nesting grounds for loggerhead turtles by 10%, while green turtles will see a 7% decrease along the US East Coast. Leatherback turtles face minimal changes in suitable habitat availability.
Researchers found Arctic winter ice grew less than half as much as normal due to increased ocean heat from the interior. This weakening of the halocline barrier allows for more efficient mixing between warmer and colder waters, limiting sea ice growth.
The Marine Technology Society has recognized a diverse group of individuals and organizations for their significant contributions to marine science and technology. The award winners include CAPT (Ret.) Craig McLean, Dr. Vladimir Ryabinin, CODAR Ocean Sensors LTD, and Dr. Manhar Dhanak, among others.
A new study finds tropical expansion is primarily driven by ocean warming caused by climate change, not atmospheric changes. The Southern Hemisphere, with more ocean surface area, experiences the most significant expansion.
Researchers describe daily variability of key deep currents in the South Atlantic Ocean, with variations linked to climate and weather globally. The study found that upper and deeper layers behave independently, impacting sea level rise and hurricane intensification.
The Florida Current, a key component of the Gulf Stream, has slowed significantly over the past century, with its strength being the weakest in the past 110 years. This decline is linked to the broader Atlantic Meridional Overturning Circulation (AMOC) system, which plays a crucial role in regulating global climate.
The study found that nutrient-poor water is pooled in the intermediate layer, allowing for vertical mixing and transport of nutrients to the surface. This process helps maintain high biological productivity in the subarctic Pacific region.
Researchers from GEOMAR found that short wind turns with strong cooling effect can explain the lower sea surface temperatures in tropical North Atlantic during summer months. Inertial waves, caused by brief variations in near-surface winds, trigger mixing between warm and cold waters.
Research from the University of Colorado Boulder shows that climate change is driving an increase in Arctic freshwater over the past two decades. This freshwater will eventually move into the North Atlantic Ocean, potentially disrupting ocean currents and temperatures in northern Europe.
Researchers studied the decline of Arctic sea ice in 2018, finding it was three times higher than the initial loss during the satellite era. The study links this decline to global atmospheric processes and warns of catastrophic impacts on air temperatures and ocean circulation if the trend continues.
Researchers have detected a newer PFAS compound, HFPO-DA, in Arctic seawater for the first time, posing similar health and persistence concerns as PFOA. Higher levels of PFAS were found in outgoing water compared to entering water from the North Atlantic.
A previously unrecognized ocean current was discovered transporting water to the Faroe Bank Channel Overflow in the North Atlantic Ocean. The research team identified a new path for cold and dense water flowing at depth, which led to this exciting finding.
The IBCAO 4.0 bathymetric chart provides a detailed map of the Arctic Ocean with higher and better resolution data than previous versions. The new chart reveals a great variety of glacial origins and helps to reconstruct geological processes in arctic latitudes.
Researchers found that sea turtles do not arrive at their targets with pinpoint accuracy, but can make course corrections in the open ocean. They use a crude true navigation system, possibly using the earth's geomagnetic field, to guide them on their way.
Scientists are working on establishing an early warning system for sudden changes in the Atlantic Ocean's sea currents. These changes can impact global temperatures and climate patterns. By monitoring temperature and density metrics, researchers aim to detect subtle shifts before they become catastrophic.
Researchers from OIST Graduate University explored how ocean currents impact plankton diversity, finding that currents create barriers that limit dispersal and force coexistence of species. The study used mathematical models and metagenomics to uncover the mystery behind high plankton diversity in oceans.
Researchers from OIST Graduate University discovered the crown-of-thorns starfish's evolution, shedding light on its population changes and potential threats to coral reefs. The findings suggest complex ocean currents in the Ryukyu Archipelago may aid the survival of the larvae.
A University of Maryland researcher discovered that churning along the edge of the Gulf Stream can mix water across the current, influencing weather, climate, and fisheries. This finding has significant implications for understanding ocean circulation, biology, and potentially climate.
Using highly novel techniques, researchers observed upper ocean currents of approximately 0.1-10 km in size, critical for controlling heat and carbon movement between the ocean and atmosphere. These findings contribute to improving our understanding of small-scale ocean and climate processes with impacts globally.
Researchers discovered that ancient fish fossils near Japan hold valuable rare-earth elements, indicating potential new global supply sources. The findings suggest that fish populations were drawn to specific locations due to climate change and underwater geology, resulting in concentrated deposits of these metals.
The Arctic Ocean is projected to absorb 20% more CO2 by the end of the 21st century, leading to stronger ocean acidification. This increase in CO2 will negatively impact calcifying organisms such as mussels and corals, having serious consequences for the entire food chain.
Experts from Regenstrief Institute, Mayo Clinic and The Pew Charitable Trusts call for urgent action to address patient matching rates, which vary widely. The correct sharing of electronic health data among healthcare providers is crucial for identifying COVID-19 infected individuals and supporting future vaccination efforts.
Intensifying tropical cyclones strengthen ocean eddies feeding the Kuroshio Current, accelerating it and transferring more heat energy to mid- and high-latitude ocean waters. This phenomenon highlights a positive feedback loop between TCs and climate warming, potentially impacting future climate predictions.
A study led by the University of Plymouth found that sea snakes' vision has been modifying genetically over millions of generations, enabling them to adapt to new environments. The research reveals that diving sea snakes share their adaptive properties with some fruit-eating primates.
Researchers developed an algorithm to analyze ocean conditions and identify regions where objects are likely to converge. The technique uses data-driven ocean modeling and prediction systems to uncover hidden 'traps', providing first responders with a new perspective for search-and-rescue operations.
Researchers developed an algorithm to predict coastal currents using dynamical systems theory and ocean data. This new tool promises to enhance search and rescue techniques at sea, potentially saving lives.
A new study highlights the need for Indigenous collaboration in managing sea otter populations to improve coexistence between humans and this challenging predator. The study reveals that strengthening Indigenous governance authority and establishing locally designed co-management plans can enable human-otter coexistence.
Archaeological finds of Boa vertebrae on Martinique and Guadeloupe suggest the snake's cultural significance in pre-Columbian Lesser Antilles. The discovery also highlights the importance of interdisciplinary research to reconstruct lost pasts.
A new study reveals evidence of human prehistory beneath the seas in places that were dry during the Last Glacial Maximum. The researchers found many unknown, transitory islands that would have acted like stepping stones luring travelers eastward across the Bering Strait.
Scientists have discovered the highest levels of microplastics ever recorded on the seafloor, with concentrations concentrated by powerful deep-sea currents. Microplastics are mainly comprised of fibres from textiles and clothing, and their distribution is linked to sediment-transport processes.
A new study reveals that slow-moving seafloor currents near the bottom of the ocean direct the flow of microplastics, creating hotspots in sediments. These currents supply oxygen and nutrients to deep sea creatures, increasing the chance of ingestion by toxic microplastics.
Researchers assessed 1062 Mediterranean marine protected areas and found that 95% lack regulations to reduce human impacts on biodiversity. Effective levels of protection represent only 0.23% of the region.
Researchers have found a rare marine snail, Leptogyra bujnitzkii, in a biological collection from the Soviet Arctic expeditions of the 1930s. The discovery suggests the presence of sunken wood biocenoses in the Arctic Ocean.
The Southern Ocean's biodiversity is at risk due to current marine protected areas, which are insufficient to represent the region's unique habitats and species. To address this, a new study suggests doubling existing protected areas to better safeguard biodiversity and resilience in the face of climate change.
Researchers studied the nexus between climate, upwelling, and marine ecosystems, finding that each Eastern Boundary Upwelling System (EBUS) has unique drivers and climate variability. The study highlights the importance of considering local and remote forcing factors in predicting long-term variations in upwelling.
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.
A team of researchers from the University of California - Santa Barbara used big data and optimization algorithms to identify high-biodiversity hotspots in international waters. These areas could become the first generation of high seas marine protected areas, leveraging new global data assets and tools for conservation.
Tropical Cyclone Harold has caused severe flooding and property damage in Vanuatu, with NASA's GPM satellite detecting heavy rainfall rates of up to 48 mm per hour. The cyclone is now a Category 4 storm, forecasted to continue affecting Fiji later this week.
Research reveals stronger Atlantic currents are key to 'Atlantification', where temperate species like Emiliania huxleyi thrive in Arctic waters. Satellite images show turquoise oceans reflecting the microalgae's shell, a phenomenon observed from space.
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 new framework will help marine scientists design more accurate experiments to understand the impact of global warming on marine life. The framework provides a simple way to select future CO2 levels and temperature for experiments, taking into account regional variability and local conditions.
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.
Researchers found that sea turtles respond to odors from biofouled plastics in the same way they respond to food odorants. This 'olfactory trap' explains why sea turtles ingest and become entangled in plastic debris. Biofouling, the accumulation of microbes on wet surfaces, is a major factor contributing to this attraction.
A team of scientists has identified a new isotopic signature, 233U/236U, that distinguishes between environmental emissions from civil nuclear industry and weapons fallout. This discovery provides a promising tool for tracing ocean currents and understanding the impact of human activities on the environment.
Researchers found fossilized thread-like filaments connecting organisms across nearly 40 sites in Newfoundland, Canada. The discovery may have revealed ancient social networks and challenged earlier studies of Ediacaran organisms' interactions.
A new study by UCF predicts that Canaveral National Seashore will experience the greatest impact from sea level rise and hurricanes, with a loss of about 1% of its loggerhead habitat by 2100. The study used a new method to calculate current and future sea turtle nesting areas, which can help the National Park Service manage resources.