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Ocean Circulation

All articles tagged with #ocean circulation

Congo River Freshwater Takes a Bursty Atlantic Voyage via Giant Ocean Eddies
science6 days ago

Congo River Freshwater Takes a Bursty Atlantic Voyage via Giant Ocean Eddies

A new study using high‑resolution ocean modeling and satellite data traces the Congo River’s 40,000 m3/s freshwater plume into the tropical Atlantic, revealing that giant mesoscale eddies trap and carry river water hundreds of kilometers offshore in bursts rather than a steady spread, with seasonal discharge still driving the overall transport and smaller submesoscale features occasionally contributing. The findings impact understanding of regional circulation, climate and marine ecosystems across the Atlantic.

via The Times of India|
#atlantic-ocean#congo-river#freshwater-plume
AMOC on edge: new studies warn Atlantic current could weaken toward collapse
science2 months ago

AMOC on edge: new studies warn Atlantic current could weaken toward collapse

Two Science Advances studies warn the Atlantic Meridional Overturning Circulation (AMOC) is already weakening across four western Atlantic sites and could slow by more than 50% by 2100, potentially collapsing this century due to anthropogenic climate change. A weakening AMOC would cool parts of the North Atlantic, increase European winter storms, reduce Sahel and South Asian rainfall, and raise sea levels along the U.S. Northeast, underscoring the need for emissions cuts and ongoing monitoring.

via USA Today|
#amoc#climate-change#ocean-circulation
Atlantic Conveyor on the Edge: AMOC Could Collapse and Reshape Global Climate
environment2 months ago

Atlantic Conveyor on the Edge: AMOC Could Collapse and Reshape Global Climate

A new Science Advances study using real-world data suggests the Atlantic Meridional Overturning Circulation (AMOC) could weaken by about 51% by 2100 (roughly 43–59% range), potentially triggering a long-lasting climate disruption: sea levels may rise across North America, Southern Europe could face severe droughts, and Europe and the US could experience much warmer or cooler shifts with broad ecological and agricultural impacts. The timing is uncertain, but researchers urge preparation and further validation of models.

via New York Post|
#amoc#climate-change#environment
Atlantic Conveyor Near Tipping Point as Collapse Risk Rises
science2 months ago

Atlantic Conveyor Near Tipping Point as Collapse Risk Rises

Combining real-world ocean observations with climate models, researchers find the Atlantic Meridional Overturning Circulation (Amoc) is likely to slow by 42-58% by 2100 and is almost certainly headed for collapse, a scenario with potentially drastic impacts on European climate, rainfall across Africa and the Americas, and Atlantic sea levels; the study in Science Advances shows the pessimistic models match observations better, and notes that Greenland meltwater could push the risk even higher.

via The Guardian|
#amoc#climate-change#ocean-circulation
Antarctica's Hidden Canyon Network May Rewrite Ocean Circulation and Ice Melt
science4 months ago

Antarctica's Hidden Canyon Network May Rewrite Ocean Circulation and Ice Melt

A high‑resolution survey around Antarctica identified 332 submarine canyons, some deeper than 4,000 meters, with distinct eastern and western morphologies that challenge prior climate assumptions. These canyons regulate exchanges between the continental shelf and the deep Southern Ocean, channeling warm water toward ice shelves to accelerate melting while exporting freshwater that influences global ocean circulation. The dataset enables more realistic seafloor topography in climate models, though direct flow measurements are still limited and further mooring/observational campaigns are planned.

via Indian Defence Review|
#antarctica#bathymetry#ice-shelves
Southern Ocean's Hidden Role in Climate Change Revealed
science8 months ago

Southern Ocean's Hidden Role in Climate Change Revealed

A study reveals that despite climate change predictions, the Southern Ocean continues to absorb CO2 due to increased freshwater input from melting glaciers and sea ice, which enhances water stratification and temporarily prevents deep water from releasing stored CO2. However, ongoing wind strengthening may soon disrupt this balance, potentially reducing the ocean's capacity to act as a carbon sink and accelerating climate change.

via SciTechDaily|
#carbon-sink#climate-change#ocean-circulation
Unusual North Atlantic Currents Signal Potential Climate Risks
environment9 months ago

Unusual North Atlantic Currents Signal Potential Climate Risks

Recent research indicates that the North Atlantic subpolar gyre is destabilizing and may be nearing a tipping point, which could lead to severe climate consequences such as extreme weather in Europe. This destabilization, linked to global warming and historical ocean patterns, poses significant risks even if the broader Atlantic Meridional Overturning Circulation remains intact.

via Indian Defence Review|
#climate-change#climate-impact#environment
Critical Atlantic Ocean Currents Face Potential Collapse, Threatening Global Climate
science10 months ago

Critical Atlantic Ocean Currents Face Potential Collapse, Threatening Global Climate

A recent study warns that the Atlantic Meridional Overturning Circulation (AMOC), a crucial ocean current system regulating global climate, could collapse as early as 2055 due to warming and melting Arctic ice, with significant worldwide consequences. Detecting early signs through surface buoyancy flux indicates the weakening of the AMOC, and while reducing carbon emissions could prevent or delay collapse, the risk remains, emphasizing the urgent need for climate action.

via Indian Defence Review|
#amoc#atlantic-ocean-currents#climate-change
New Map Unveils Extensive and Deep Antarctic Submarine Canyons
science11 months ago

New Map Unveils Extensive and Deep Antarctic Submarine Canyons

Scientists have discovered 332 submarine canyons beneath Antarctica, significantly more than previously known, which play a crucial role in ocean circulation, ice-shelf dynamics, and climate regulation. The study highlights differences between East and West Antarctic canyons and emphasizes the need for detailed mapping to improve climate models.

via The Daily Galaxy|
#antarctica#climate-change#marine-geology
Southern Ocean's Circulation Reverses, Signaling Climate Shift
science1 year ago

Southern Ocean's Circulation Reverses, Signaling Climate Shift

Researchers have discovered a historic reversal in the Southern Ocean's circulation, with increasing surface salinity and rising deep waters bringing heat and CO₂ to the surface, disrupting traditional ocean dynamics, accelerating ice melt, and potentially triggering significant global climate impacts similar to the collapse of the Atlantic Meridional Overturning Circulation.

via Cape Town ETC|
#climate-change#ocean-circulation#salinity