Tag

Ocean Circulation

All articles tagged with #ocean circulation

science1 month ago•3 min saved

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

environment1 month ago•4 min saved

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

science1 month ago•3 min saved

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

science2 months ago•6 min saved

Ocean's Hidden Giant: Earth's Largest Waterfall Drops Beneath Arctic Waters Between Iceland and Greenland

Between Iceland and Greenland lies the Denmark Strait cataract, the planet's largest waterfall, an underwater cascade of Arctic water plunging about 11,500 feet that helps drive Atlantic circulation and move heat northward, all while remaining invisible from the surface.

via Indian Defence Review|

#amoc #denmark-strait-cataract #dense-water-overflow

science3 months ago•6 min saved

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

science7 months ago•6 min saved

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

environment7 months ago•5 min saved

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

science8 months ago•4 min saved

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

science9 months ago•3 min saved

Scientists Discover Extensive Network of Submarine Canyons Beneath Antarctica's Ice

Scientists have mapped over 300 previously unknown submarine canyons beneath Antarctica's ice, revealing their significant role in ocean dynamics and ice sheet stability, which could impact future sea-level rise predictions and climate models.

via The Daily Galaxy|

#antarctica #climate-change #ocean-circulation

science10 months ago•2 min saved

New Antarctic Discoveries Reveal Hidden Landscapes That Could Impact Climate Predictions

Scientists have mapped 332 Antarctic seafloor canyons, revealing their potential impact on ocean circulation, ice-shelf thinning, and climate change, emphasizing the need for high-resolution data to improve climate models and predictions.

via The Guardian|

#antarctica #climate-change #ocean-circulation

science10 months ago•3 min saved

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

science10 months ago•5 min saved

Ancient Mud Disproves 750,000-Year-Old Ice Theory

A new study challenges the long-held belief that a thick, permanent ice shelf once covered the Arctic, revealing instead that the region was characterized by seasonal sea ice over the past 750,000 years, allowing for open water and marine life even during cold periods, which has important implications for understanding past and future climate change.

via SciTechDaily|

#arctic #climate-change #ice-shelf

science10 months ago•5 min saved

Hidden Oceanic Waterfall Surpasses All Others in Size

The world's largest waterfall, the Denmark Strait cataract, is a massive, silent undersea flow of cold, dense Arctic water plunging over a submerged ridge between Iceland and Greenland, significantly influencing global ocean circulation and climate, yet remains largely unseen and understudied.

via Earth.com|

#climate-change #denmark-strait #ocean-circulation

science10 months ago•3 min saved

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

science1 year ago•3 min saved

New Findings on Atlantic Climate Dynamics and Future Stability

A recent study shows that changes in water density in the subpolar North Atlantic quickly influence the strength of the Atlantic Meridional Overturning Circulation (AMOC), a key component of Earth's climate system, with implications for climate prediction and monitoring strategies.

via The Daily Galaxy|

#amoc #climate-change #north-atlantic