Climate change will have far-reaching consequences for the world's oceans, affecting marine habitats and organisms, as well as human societies that depend on them. The study warns of massive disruptions to food chains, fishing, and tourism, with up to 870 million people relying on ocean goods and services.
A new study predicts that climate change will significantly impact the world's oceans by 2100, affecting marine habitats and organisms. The study reveals that no corner of the ocean will be untouched by changes in temperature, acidification, oxygen depletion, and productivity, with massive disruptions to food chains, fishing, and tourism.
A new study reveals dramatic ocean mixing in Drake Passage, crucial for regulating Earth's climate and ocean currents. The research provides detailed information needed to accurately predict long-term climate projections.
Researchers collected water samples up to six kilometres below the surface of the Southern Ocean, finding that physical transport in the ocean on currents shapes microbial communities. The study shows that communities connected by ocean currents are more similar to each other, regardless of distance.
Scientists found that ocean currents carrying anammox bacteria produce vast amounts of nitrogen gas in the Pacific Ocean, weakening the ocean's ability to absorb CO2. This process also leads to fewer algae in the water, less food for marine microorganisms and ultimately, a decrease in fish populations.
Researchers have developed a new tool that can predict fish habitat conditions six months in advance. The JISAO Seasonal Coastal Ocean Prediction of the Ecosystem (J-SCOPE) uses global climate models and regional coastal ocean simulations to forecast ocean temperatures, oxygen levels, and phytoplankton blooms.
Researchers at GEOMAR found that about one third of oxygen supply in tropical oxygen minimum zones is provided by vertical turbulent mixing, surprising previous assumptions. High-precision measurements confirmed this finding, using a tracer and profiling current meters.
Marine scientists have decoded the mechanism for long-term climate fluctuations in the Atlantic, revealing that ocean currents significantly affect long-term climate variability. The study found that heat exchange between ocean and atmosphere influences decadal climate fluctuations, which are superimposed on the general warming trend.
Scientists from CSIRO and the University of NSW attribute rapid ocean warming to global greenhouse gas emissions and aerosol decline. Models show a 30-year delay in Indian Ocean warming due to aerosol levels, highlighting human-emitted aerosols' significant impact on remote ocean temperatures.
A new study suggests that increased atmospheric CO2 levels are altering the types of nitrogen-fixing cyanobacteria in the ocean, with implications for ocean productivity and fisheries. The research found that certain strains of these bacteria thrive in high CO2 environments, while others may struggle to survive.
A new study finds that all existing coral reefs will be engulfed in inhospitable ocean chemistry conditions if civilization continues on its current emissions trajectory. Deep cuts in emissions are necessary to sustain even a fraction of existing reefs.
Researchers found at least 1000 types of bacterial cells on plastic debris, including autotrophs, heterotrophs, and symbionts. The plastisphere may alter ocean ecosystems and transport harmful microbes, sparking concerns about its impact on marine life.
Research at Princeton University found that migrating ocean animals consume vast amounts of oxygen in the ocean's 'oxygen minimum zone'. This phenomenon, known as diel vertical migration (DVM), results in oxygen depletion and can be disrupted by climate change.
Coral reefs are more vulnerable to disruption and erosion due to ocean acidification, which reduces the density of coral skeletons. The study found that corals cannot fully acclimate to low pH conditions in nature.
A global study of ocean nitrogen cycle changes at the end of the last ice age confirms the oceans' ability to balance on a global scale. However, the data suggests it is a slow process that may take centuries or millennia, highlighting concerns about current rapid changes.
A team of Spanish researchers has sequenced the global deep ocean genome using over 2,000 samples of microorganisms collected from the Atlantic, Indian, and Pacific Oceans. This groundbreaking study reveals a vast unknown species of microorganisms with intense biological activity.
Researchers found that purple sea urchins can adapt to ocean acidification through natural variation and heritable traits. The study suggests that adaptation will play a significant role in the survival of this keystone species as carbon dioxide levels increase.
Scientists have created global maps showing how shipping noise affects the ocean, with high levels appearing in northern Atlantic and Pacific Oceans and along major shipping routes. The models take into account factors like water temperature, pressure, and sediment type to predict sound wave propagation.
Researchers reconstructed Arctic circulation through sediments and found that protactinium was being swept out of the Arctic before settling to the bottom. This suggests that the water couldn't have been stagnant, contradicting assumptions about the impact of the last ice age on global ocean currents. The study's findings indicate that...
A team led by UCSB professors found that certain microscopic shelled plants, such as Emiliania huxleyi, can tolerate high levels of carbon dioxide and even increase shell production, but may grow slower. This discovery suggests variable responses in marine organisms to ocean acidification.
A multi-author review paper reviews ocean nutrient patterns and interactions, highlighting their influence on climate by fuelling biological production. The study emphasizes the importance of understanding nutrient cycles in predicting future environmental changes.
A study published in Nature Geoscience reveals that oceanographic reorganisations and biological processes linked to airborne dust in the Southern Ocean drove past rapid fluctuations in atmospheric carbon dioxide levels. The research found large changes in chemical stratification of the Southern Ocean on millennial timescales, highligh...
A new study reveals that some turtle populations are among the least likely to recover from climate change impacts. Protecting key regional nesting beaches and areas suitable for future nesting is crucial to enhance marine turtles' resilience.
Using ocean WiFi hotspots, Stanford professor Barbara Block is tracking animal movements in real-time, enabling new insights into marine ecosystems and fisheries management. Her 'Wired Ocean' project aims to establish a global network of instruments to study the biosphere under unprecedented human impact.
A long-term mesocosm experiment off Sweden investigates the effects of ocean acidification on plankton communities, shedding light on their ability to adapt to new conditions. The study also explores the impact of ocean acidification on the development of fish at the base of the food web.
The inclusion of intense but small-scale polar storms in climate models could lead to a different picture of climate change. Adding these storms results in significant changes in ocean circulation, including an increase in heat traveling north in the Atlantic Ocean.
A new study found severe dissolution of pteropod shells in Southern Ocean waters due to ocean acidification. The tiny snails are a valuable food source for fish and birds, and their shells dissolving may increase vulnerability to predation and infection.
A University of Houston geologist is leading an international team on a two-month, $10 million expedition to drill into the Pacific Ocean's lower crust. The voyage aims to distinguish between competing theories on magma intrusion, shedding light on volcanic seafloor spreading and oceanic processes.
Researchers, led by Dr. Emily Shuckburgh, apply mathematical ideas from dynamical systems to analyze circulation in the Southern Ocean. Mixing of water with different properties is a key determinant in heat uptake by oceans.
A new study projects a 14-20% decline in maximum fish body weight by 2050, with the tropics being most impacted. The research highlights the need to curb greenhouse gas emissions and monitor changes to ocean ecosystems.
A new study reveals how warming waters in the Southern Ocean can connect with the movement of massive ice-sheets deep in the Antarctic interior. The research found that ocean warming can trigger increased flow of ice through narrow glaciers, causing inland sectors of the ice-sheet to become thinner and flow faster.
Researchers discovered Arctic crustaceans migrate below sea ice during winter nights, using deep-ocean currents to reach colder areas. This adaptation increases survival and enables them to remain in the Arctic Ocean, a key finding that challenges previous perceptions of ice fauna's vulnerability.
Researchers Kevin Speer and John Marshall suggest that the majority of ocean heat transport occurs in the Southern Ocean surrounding Antarctica, driven by strong winds. This finding could significantly impact our understanding of global climate processes.
The Ocean Health Index assesses the benefits to people of healthy oceans, combining ecological, social, economic, and political conditions. It scores countries globally, ranging from 36 to 86, with densely populated nations like Germany and uninhabited islands leading the way.
A team of researchers, including UBC scientists, assessed global ocean health and created the Ocean Health Index, scoring countries from 36 to 86. Canada and the US performed well with scores of 70 and 63 respectively.
Researchers found that when hurricanes blow over ocean regions swamped by fresh water, the conditions can intensify the storm. This results in a 50 percent increase in intensity, which can lead to much larger destruction and death.
A new study in Nature confirms an improved method for measuring nitrogen fixation in the ocean, revealing rates that are between 62 and 600 percent higher than previously measured. The findings leave a gap in the nitrogen budget due to incomplete knowledge of microorganisms responsible for these processes.
Researchers found that localized pathways created by winds, currents, and eddies draw waters down into the deep ocean, locking away carbon from the atmosphere. This improved understanding helps predict effects of climate change on ocean carbon absorption.
A team of scientists has discovered a method of how carbon is drawn down from the surface of the Southern Ocean to deep waters, utilizing winds, currents, and eddies. This understanding improves knowledge of climate change effects on ocean carbon absorption.
Kendall L. Carder has been recognized with the Jerlov Award for his groundbreaking research on in situ optical measurements, underwater imaging systems, and ocean color remote sensing. His contributions have significantly advanced our understanding of light in the ocean.
A new trigger for the North Atlantic plankton bloom has been discovered, revealing that swirling currents of seawater sustain phytoplankton in shallower waters. This phenomenon is crucial to the ocean's carbon cycle, absorbing vast amounts of carbon dioxide and emitting oxygen.
Researchers found that whirlpools, or eddies, in the North Atlantic Ocean sustain phytoplankton growth, allowing them to thrive in shallower waters with ample sunlight. This discovery helps explain the timing and patchy appearance of the massive spring blooms.
New research by Lawrence Livermore National Laboratory scientists reveals that human activities are the primary cause of global ocean warming over the past 50 years. The study analyzed observational and modeling uncertainties to confirm this conclusion.
MoLab measures biological, physical, chemical, or geological parameters over several months and square kilometers. The system investigates the impact of climate change on corals and their ecosystems.
Scientists from WHOI conducted a new study measuring carbon levels at various depths in the Arctic Ocean. The data will help researchers understand how carbon cycles through the marine ecosystem and respond to rising global temperatures.
Scientists have measured a significant decline in Antarctic Bottom Water, a key driver of global ocean currents, with a 60% reduction estimated since 1970. The densest waters are becoming less saline, indicating rapid response to climate changes.
A new transatlantic graduate school in ocean system science and technology is launched by German and Canadian researchers. The Helmholtz Research School will improve understanding of the ocean's responses to natural and human influences, with a focus on sustainable use of marine resources.
Marine researchers have linked ocean acidification to the collapse of oyster seed production at an Oregon hatchery, where larval growth declined due to corrosive water conditions. The study's findings suggest that increased CO2 levels may push oyster larval growth past the break-even point in terms of production.
A new study links the end-Ordovician mass extinction to nutrient-driven anoxia in the global ocean. The research overthrows century-old knowledge on why marine animals faced their first major challenges, highlighting the tight coupling between life evolution and oxygen dynamics.
A University of Rhode Island oceanographer is leading an effort to partner with the global shipping industry to collect detailed ocean data on commercial vessels. The proposed OceanScope initiative aims to fill observational deficiencies in the ocean, particularly below the surface, where satellites cannot measure properties.
A new study reveals a global ocean warming trend spanning at least 100 years, with an average increase of .33-degree Celsius in upper ocean temperatures. The research uses historical temperature readings from HMS Challenger's 1872-1876 voyage and modern data from the Argo program.
A recent study led by a US scientist estimates that human impacts on the ocean could cost the global economy over $1 trillion per year by 2100. The research highlights the urgent need to reduce pollution, overfishing, and other threats to ocean health.
The Surface Ocean CO2 Atlas (SOCAT) provides a comprehensive dataset of 6.3 million global observations since 1968, documenting year-to-year and decadal changes in ocean carbon uptake. This will help assess the feedbacks between climate change and the ocean carbon cycle.
Researchers found a link between large dust storms on southern Iceland and accelerated glacial melting, while also increasing nutrients in the North Atlantic Ocean. The iron-rich dust boosts ocean primary productivity and stimulates marine biota growth, drawing down CO2 from the atmosphere.
Scientists have tracked water from Bass Strait to the Indian Ocean using ocean gliders, revealing a 200-metre tall wall of water and discovering undiluted Bass Strait water hundreds of kilometres away. The study showcases the benefits of Australia's Integrated Marine Observing System.
Research by UBC scientists finds that adding ocean acidification and deoxygenation to climate change projections can significantly reduce fish catch potential in certain regions. For example, the Norwegian Sea may see a 15% decrease in fisheries catch potential due to combined effects of warming and acidification.
As ice melts in the Far North, Canada faces growing challenges but also opportunities to lead international governance in ocean law. David VanderZwaag, a leading expert, emphasizes the country's strengths in ocean governance and suggests advancing laws on shipping regulation, ocean governance and marine biodiversity protection.
The Tasman Sea has become a global warming hotspot, with ocean temperatures rising two degrees warmer than 60 years ago due to intensified east-west winds and greenhouse gas emissions. A long-term monitoring network is needed to track these changes.
A comprehensive study of ocean acidification has made key findings, showing that some marine ecosystems are already experiencing acidity levels not predicted to occur until the end of the century. The study used sensors developed at Scripps Institution of Oceanography and found variability in seawater pH within and across ecosystems.
Expanding ocean dead zones driven by climate change reduce oxygen levels, forcing blue marlins and other billfish to surface waters where they are more vulnerable to fishing. This shift affects the long-term health of these species and their ecosystems.