Tag

Sea Ice

All articles tagged with #sea ice

science27 days ago•7 min saved

Arctic bears adapt: Svalbard polar bears stay healthy despite melting ice

A Scientific Reports study of hundreds of Svalbard polar bears finds their body condition improved from 2000 to 2019 even as sea ice declined, suggesting dietary adaptation (more ringed seals and land prey like reindeer, plus scavenging) and regional variability among roughly 20 populations; while other regions like Western Hudson Bay show declines, climate change remains a major threat, and polar bears are not doomed everywhere.

via vox.com|

#arctic #climate-change #polar-bears

science1 month ago•3 min saved

Clouds Force Detour in Thwaites Expedition, Steering Researchers to Pine Island

Persistent low clouds kept helicopters grounded on Thwaites Glacier, so the icebreaker Araon rerouted to Pine Island Glacier to begin the season’s fieldwork, with teams testing sea ice, extracting ice cores, collecting seawater samples, calibrating equipment, and starting in-situ research amid a penguin sighting.

via The New York Times|

#antarctica #expedition #science

science2 months ago•5 min saved

Scientists warn of irreversible Antarctic changes and potential catastrophe

Australian scientists warn that Antarctica is experiencing rapid, irreversible climate changes, including shrinking sea ice, weakening ocean currents, and destabilizing ice sheets, driven by global warming. These changes threaten global sea levels and ecosystems, emphasizing the urgent need for deep emission cuts this decade to prevent irreversible damage.

via Earth.com|

#antarctica #climate-change #global-warming

science2 months ago•4 min saved

Massive Antarctic Sea Ice Hole Unveils Hidden Force

A massive hole in Antarctic sea ice, known as a polynya, was caused by complex interactions between wind, ocean currents, and salinity, revealing how localized ocean processes can have significant impacts on global climate and ocean circulation. The event, driven by Ekman-driven salt transport and deep convection, highlights the changing dynamics of the Southern Ocean in the context of climate change, with potential implications for heat and carbon exchange.

via Indian Defence Review|

#antarctica #climate-change #ocean-currents

science6 months ago•2 min saved

Scientists Warn of Catastrophic Consequences from Rapid Antarctic Ice Loss

Scientists warn that climate change is causing irreversible ice loss in Antarctica, which could lead to catastrophic environmental impacts, including accelerated warming, ecosystem collapse, and potential ice-free conditions in summer, with some effects possibly unavoidable even if emissions are reduced.

via DW|

#antarctica #climate-change #global-warming

environment6 months ago•33 min saved

Scientists Warn of Rapid and Abrupt Changes in Antarctica's Environment

Emerging evidence indicates abrupt environmental changes in Antarctica, including significant sea ice loss, ice sheet melting, and potential climate tipping points, driven by global warming and oceanic changes, with implications for sea level rise and ecosystem stability.

via Nature|

#antarctica #climate-change #environment

science6 months ago•2 min saved

Rapid Antarctic Ice Loss Signals Critical Climate Tipping Point

A scientific study warns that the rapid loss of Antarctic sea ice could be a critical climate tipping point, leading to irreversible effects such as sea level rise, altered ocean currents, and ecosystem damage, with some changes potentially continuing even if global warming is stabilized.

via Reuters|

#antarctica #climate-change #global-warming

environment6 months ago•4 min saved

Arctic Changes Threaten Global Climate Stability

A study published in Nature Climate Change reveals significant shifts in Antarctic phytoplankton communities over nearly three decades, driven by reduced sea ice and iron availability, leading to a decline in diatoms crucial for carbon sequestration. These changes threaten to disrupt the marine food web and accelerate global climate change by decreasing the ocean's ability to store carbon, highlighting the importance of long-term data collection in understanding climate impacts.

via The Daily Galaxy|

#antarctic #carbon-cycle #climate-change

science7 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

science7 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

environment7 months ago•4 min saved

Rising Ocean Salinity Near Antarctica Threatens Sea Ice and Climate Stability

The Southern Ocean around Antarctica is becoming saltier and losing sea ice at an unprecedented rate, driven by a surprising feedback loop where increased salinity causes heat to rise from the depths, melting ice and further accelerating climate change impacts globally. This rapid change threatens ecosystems, sea levels, and weather patterns, highlighting the urgent need for continued monitoring and updated climate models.

via ScienceAlert|

#antarctica #climate-change #environment

environment7 months ago•3 min saved

Antarctic Ice Decline Accelerates Amid Rising Ocean Salinity and US Data Sharing Halt

Scientists warn that the US Department of Defense's decision to stop sharing satellite data on sea ice could hinder global efforts to monitor climate change impacts, especially in Antarctica where record low sea ice levels are accelerating ice shelf calving and potential sea level rise, with broader ecological consequences.

via The Guardian|

#antarctica #climate-change #environment

science8 months ago•1 min saved

Rising Salinity in Southern Ocean Accelerates Antarctic Ice Loss

A recent study reveals that increasing salinity in the surface waters near Antarctica is accelerating sea ice melt, contributing to the observed decline in Antarctic sea ice over the past decade and indicating a shift to a new environmental system.

via The New York Times|

#antarctica #climate-change #ocean-studies

science8 months ago•2 min saved

NASA Satellite Captures Major Sea Ice Breakup in Canada

NASA satellite images show significant cracks forming in the sea ice of Canada's Amundsen Gulf, a region historically navigated by explorers like Roald Amundsen. The breakup of sea ice, driven by seasonal warming and wind, poses ongoing challenges for Arctic navigation and is indicative of broader climate change impacts in the region.

via Space|

#arctic #canada #climate-change

environment1 year ago•2 min saved

Antarctic Ice Melting Accelerates Amid Unusual Patterns and Risks

Scientists are alarmed by the second-lowest recorded Antarctic sea ice winter maximum, with only 6.6 million square miles covered, continuing a decade-long trend of decreasing ice. This phenomenon, potentially indicating a new state for Southern Ocean sea ice, is attributed to warm near-surface ocean temperatures rather than just rising air temperatures. While some experts caution against immediately linking this to global warming, the pattern aligns with the broader trend of rising global temperatures driven by fossil fuel use.

via The Cool Down|

#antarctica #climate-change #environment