Tag

Sea Ice

All articles tagged with #sea ice

environment8 days ago•1 min saved

Antarctic Sea Ice Hits Third-Lowest Peak as New Study Confirms Inevitable Ice Sheet Loss

Antarctica’s winter sea ice reached its third-lowest recorded maximum on September 14, 2026, falling nearly 1 million square kilometers below the long-term average. This marks the fourth consecutive year of record-low winter peaks, signaling a systemic shift rather than a temporary anomaly. Simultaneously, a new study in Nature Geoscience confirms that the Antarctic Ice Sheet is committed to mass loss this century, even under aggressive emissions cuts. While sea ice loss does not directly raise sea levels, it weakens ice shelves, potentially accelerating glacier flow and contributing up to 25.4 cm of sea-level rise by 2100 under high-emission scenarios.

via The Guardian|

#antarctica #climate-change #environment

science1 month ago•109 min saved

Arctic open water inches toward the North Pole, satellite shows

A NASA Worldview image from Aug. 29, 2026 shows large patches of open water as close as about 37 miles (60 km) to the North Pole, signaling a thinner, more fragile Arctic sea ice. While researchers say the extent isn’t necessarily worse than recent years, the area’s rapid changes are driven by summer fragmentation, winds and currents. The broader takeaway is a rapidly warming Arctic (about four times the global average) that could affect local weather, marine ecosystems and coastal risks, with ice expected to refreeze by mid to late September.

via Live Science|

#arctic #climate-change #nasa-worldview

climate1 month ago•34 min saved

July 2026 Joins 2024 as Hottest July on Record

July 2026 tied with July 2024 as the hottest July on record, with NASA rating it the hottest July and NOAA/NCEI noting it’s likely the warmest month since 1850. Global ocean temperatures were record-warm for July while land temps were among the warmest; North America, Africa, and Asia posted their warmest July on record. The year-to-date is among the warmest on record, and a strengthening El Niño could push 2026 (and 2027) toward new highs. Arctic sea ice extended to its sixth-lowest July extent and Antarctic sea ice was near its fifth-lowest for July. Dozens of heat records were set worldwide, and the first half of 2026 saw 29 billion-dollar weather disasters totaling about $104 billion in damage. Scientists warn that the coming months could see further extreme warmth due to El Niño and ongoing climate change.

via Yale Climate Connections|

#climate #climate-change #el-nino

science2 months ago•6 min saved

Antarctic penguins switch diet from fish to krill as sea ice vanishes, study finds

Using 30 years of satellite data plus color analysis of penguin guano, researchers show Adélie penguin diets track sea-ice conditions: more fish when ice is plentiful, more krill when ice is scarce. Penguins that rely more on krill are in decline, highlighting climate-driven shifts in the Antarctic food web and increasing competition for krill amid fisheries.

via BBC Wildlife Magazine|

#adelie-penguin #antarctic-ecosystem #climate-change

science2 months ago•6 min saved

Penguin foraging reveals prey become harder to reach under Antarctic sea ice

Tracking 23 Adélie penguins across 6,000+ dives beneath Antarctic sea ice shows prey can become much harder to reach even when abundant: krill shift deeper or farther in response to repeated hunting, keeping feeding rates steady but forcing penguins to work harder to find food. The study highlights prey accessibility as a key driver of predator foraging, with implications for climate change and krill fisheries.

via The Times of India|

#antarctica #krill #penguins

earth-science3 months ago•5 min saved

Bering Sea Ice Breaks Up as Summer Approaches

NASA’s Earth Observatory uses MODIS imagery from NASA’s Terra satellite to show the Bering Sea thaw as sea ice fragments break apart and sediment-laden coastal waters appear around Alaska’s Yukon Delta, signaling the approach of summer.

via NASA Science (.gov)|

#bering-sea #earth-science #modis

science3 months ago•82 min saved

Antarctica’s Texas-sized ice gap signals a warming ocean

A Texas-sized patch of winter sea ice failed to form in the Bellingshausen Sea off western Antarctica, a rare gap visible via satellites and likely linked to ocean warming; scientists say this is at least the third year in four that the region has seen unusually low sea ice, with potential effects on climate, ocean currents, and wildlife, and implications for nearby ice shelves such as Thwaites Glacier.

via Live Science|

#antarctica #bellingshausen-sea #climate-change

environment3 months ago•4 min saved

France-sized gap opens in West Antarctica’s winter sea ice as temperatures spike

A France-sized area of winter sea ice is missing from Antarctica’s Bellingshausen Sea, about 650,000 sq km below the 1991–2020 average. The loss coincides with extreme warmth on the Antarctic Peninsula (temps up to 15.4C, far above the norm) and is linked to ocean warming. The ice deficit threatens krill habitat, penguin breeding, and could hasten glacier melt and future sea-level rise, especially near Pine Island and Thwaites.

via The Guardian|

#antarctica #climate-change #environment

environment4 months ago•56 min saved

Arctic sea-ice melt triggers nutrient tipping point, threatening the food web

New research shows that rapid Arctic sea-ice loss since 2009 reduced nitrate in the Arctic Ocean via denitrification, limiting the nutrients needed for phytoplankton growth. As more light promotes phytoplankton proliferation, the nitrate pool shrinks, shifting communities toward smaller phytoplankton and weakening energy transfer up the food web, potentially impacting fisheries and carbon sequestration. Recovery of nitrate would be slow even if sea ice rebounds, making nitrate a key driver of future Arctic productivity and climate projections.

via Live Science|

#arctic #denitrification #environment

environment4 months ago•15 min saved

Three-stage warming pushes Antarctic sea ice toward a tipping point

A Southampton-led study in Science Advances identifies a three-stage sequence behind Antarctic sea-ice collapse to record lows since 2015: warm Circumpolar Deep Water rising toward the surface, intensified mixing that rapidly melts ice (especially East Antarctica), and a self‑reinforcing cycle that prevents new ice from forming. The East Antarctica melt is ocean-heat-driven, while West Antarctica is amplified by cloud-driven warming. If this persistent low-ice state continues, the Southern Ocean could become a long‑term driver of global warming, with destabilized currents and potential impacts on sea level and climate.

via Oceanographic Magazine|

#antarctica #climate-change #environment

science4 months ago•92 min saved

Antarctica’s sea-ice melt: winds and deep heat rewrite the southern ocean story

A Science Advances study traces Antarctica’s sudden sea-ice collapse from 2013–2023 to a three-stage sequence in which stronger westerly winds first slosh cold, fresh surface waters away and uncover a deeper warm, salty layer, then mix that heat upward after 2015, and finally trigger self-reinforcing feedbacks that thin and delay sea-ice formation. The result has driven record-low sea-ice extent in 2023 and below-average extents in 2024–26, while threatening the Southern Ocean’s heat and carbon storage and disrupting ecosystems. Although the system has shifted to a new regime, scientists say a full collapse hasn’t occurred yet and future changes (like precipitation or glacier melt) could alter the trajectory.

via Live Science|

#antarctica #climate-change #oceanography

planet-earth5 months ago•64 min saved

Deep Ocean Heat Triggers Antarctica's Sudden Sea-Ice Decline

Antarctic sea ice began a rapid, decade-long decline around 2016 after a “violent release” of heat from the deep ocean. Argo floats tracked warming temperatures and salinity shifts, showing that deeper warmth, churned up by winds and a fresher surface layer, prevented ice formation and hindered recovery. The findings underscore the ocean’s key role in decadal sea-ice variability and have implications for adjacent ice shelves and potential sea-level rise, though the long-term trend remains negative as the climate continues to warm.

via Live Science|

#antarctica #argo-floats #climate-change

environment6 months ago•3 min saved

Emperor penguins endangered as Antarctic sea ice vanishes

An IUCN red list update moves emperor penguins from near threatened to endangered as climate-driven sea-ice loss triggers mass chick drownings and colony collapses, with the population expected to decline about 50% by the 2080s (to roughly 595,000 adults), highlighting broader Antarctic ecosystem stress including krill-dependent species such as fur seals.

via The Guardian|

#climate-change #emperor-penguin #environment

environment6 months ago•4 min saved

Arctic winter sea ice near record low as global heat records surge

Arctic sea ice reached its winter maximum at about 5.52 million square miles, roughly tying the lowest on record and about 525,000 square miles below the 1981-2010 winter average, signaling a steady decline as warming continues. The smaller ice pack means less sunlight reflected, allowing more heat to enter the oceans and potentially affect the summer melt and weather patterns. Antarctica meanwhile posted its coldest March day on record; melting sea ice does not raise sea levels, but the broader loss signals climate disruption with implications for ecosystems and shipping routes.

via NBC News|

#arctic #climate-change #environment

science8 months 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