Tag

Southern Ocean

All articles tagged with #southern ocean

earth-science1 month ago•7 min saved

Meltwater from Antarctic Giant Triggers South Atlantic Phytoplankton Bloom

A melting Antarctic iceberg, A-23A, released nutrient-rich meltwater as it drifted into warmer South Atlantic waters, fueling a large phytoplankton bloom detectable by NASA satellites (VIIRS on Suomi NPP and the PACE mission). Scientists say light conditions and nutrients from iceberg melt promote bloom formation, with implications for the marine food web and carbon cycling; the duration and full ecological impact remain under study.

via NASA Science (.gov)|

#earth-science #iceberg-a-23a #nasa-earth-observatory

science2 months ago•9 min saved

West Antarctic Melt Might Dim Ocean Carbon Uptake, Study Finds

New research in Nature Geoscience shows that past West Antarctica ice retreat delivered iron to the Southern Ocean, but much of that iron was weathered and poorly soluble, so algae growth did not surge as expected; the study suggests continued WAIS thinning could reduce the ocean's CO2 uptake in the Pacific sector, revealing that the iron's chemical form, not just its amount, governs carbon drawdown.

via SciTechDaily|

#algae #carbon-dioxide-uptake #iron

science4 months ago•5 min saved

Antarctica’s Southern Ocean May Trigger a Century-Long Heat Release

A study warns that the Southern Ocean around Antarctica could release stored heat in a 'thermal burp' lasting over a century, potentially reversing climate gains from emission reductions and causing global temperatures to spike unexpectedly, highlighting the complex and uncertain response of Earth's climate system to human efforts.

via Indian Defence Review|

#antarctica #climate-change #co2-removal

science4 months ago•5 min saved

Potential Century-Long Thermal 'Burp' in Antarctica's Southern Ocean

The Southern Ocean around Antarctica has been absorbing significant heat due to climate change, and models suggest it could suddenly release this stored heat in a century-long 'burp,' potentially reversing some cooling efforts and accelerating global warming, highlighting the urgency of reducing greenhouse gas emissions.

via Live Science|

#antarctica #climate-change #heat-storage

science5 months ago•2 min saved

Scientists Discover 'Death-Ball' Sponge and Other Deep-Sea Creatures in Southern Ocean

Scientists exploring the Southern Ocean have discovered a variety of new and bizarre deep-sea creatures, including the carnivorous 'death-ball' sponge, iridescent worms, and new sea stars, highlighting the vast unknown biodiversity of the deep sea and the importance of ongoing exploration.

via Gizmodo|

#deep-sea #exploration #marine-biodiversity

science5 months ago•1 min saved

New 'Death Ball' Sponge and 29 Other Deep-Sea Species Discovered in Southern Ocean

Scientists exploring the remote Southern Ocean discovered 30 new deep-sea species, including a unique carnivorous sponge called 'death ball', along with new worms, sea stars, crustaceans, and mollusks, highlighting the vast undocumented biodiversity in this largely unexplored region.

via The Guardian|

#deep-sea-exploration #marine-biodiversity #marine-biology

science5 months ago•3 min saved

Southern Ocean's 'Burp' Threatens to Accelerate Global Warming

Climate scientists warn that the Southern Ocean may release a 'burp' of stored heat after humans reduce greenhouse gas emissions, potentially reigniting global warming for over a century, especially impacting the Southern Hemisphere and vulnerable countries in the global south.

via ScienceAlert|

#carbon-dioxide #climate-change #global-warming

science5 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

science7 months ago•3 min saved

Scientists React to End of U.S. Antarctic Research Vessel

Scientists are urging the U.S. to reconsider terminating the lease of the Nathaniel B. Palmer, the country's only Antarctic research vessel, emphasizing its critical role in climate research, sea ice studies, and understanding glaciers like Thwaites, with concerns that losing it would diminish U.S. scientific leadership in the region.

via Phys.org|

#antarctica #climate-change #nathaniel-b-palmer

world7 months ago•2 min saved

Scientists Confirm Earth's Fifth Ocean

Earth has five oceans, with the Southern Ocean officially recognized in 2021 by National Geographic, defined by the Antarctic Circumpolar Current rather than land boundaries, highlighting its ecological importance and the impact of climate change on its future.

via IFLScience|

#climate-change #conservation #geography

science9 months ago•6 min saved

Southward Shift in Ocean Circulation and Its Climate Impact

Recent measurements suggest a reversal in the salinity trend in the Southern Ocean around Antarctica, shifting from freshening to increased salinity, which complicates understanding of regional climate processes. While these changes are not large, they provide important clues about the complex interactions between sea ice, ocean circulation, and climate factors. The region's climate system is highly dynamic and challenging to model accurately, requiring integrated observations and advanced models to better predict future changes.

via RealClimate|

#antarctica #climate-change #ocean-salinity

science9 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

science9 months ago•3 min saved

Southern Ocean's Changing State and Its Global Climate Impact

A report claiming the reversal of the Deep Western Boundary Current (DWBC) and a catastrophic collapse of the Atlantic Meridional Overturning Circulation (AMOC) is false. The recent study discussed surface salinity changes in the Southern Ocean but did not indicate any reversal of ocean currents or system collapse. The claim of a current reversal is based on a misinterpretation and an erroneous press release, and experts clarify that there is no evidence of such an event occurring.

via Newsweek|

#amoc #climate-change #fact-check

science9 months ago•4 min saved

North Atlantic Cold Blob Indicates Century-Long Ocean Circulation Slowdown

A historic reversal of a major Southern Hemisphere ocean current has been confirmed, signaling a potential catastrophic shift in the global climate system, with risks including accelerated warming, destabilized weather patterns, and increased atmospheric CO₂ due to the release of deep-ocean stored carbon, all amid record marine heatwaves and weakening of the Antarctic overturning circulation.

via bne IntelliNews|

#carbon-release #climate-change #climate-tipping-points

science9 months ago•4 min saved

Antarctic Ice Loss Accelerates Amid Changing Ocean Conditions and Data Gaps

Scientists have discovered that the Southern Ocean around Antarctica is becoming much saltier, leading to the melting of sea ice from below and the reappearance of a large ice hole, which could accelerate global warming and cause significant ecological and weather changes.

via SciTechDaily|

#antarctica #climate-change #salinity-increase