tldrdailynews.com logo
Tag

Ice Sheets

All articles tagged with #ice sheets

Tropical Warm Pool Triggers Record East Antarctic Snowfall, Briefly Boosting Ice Mass
science1 month ago

Tropical Warm Pool Triggers Record East Antarctic Snowfall, Briefly Boosting Ice Mass

Researchers say sustained warming in the tropical warm pool (2021–23) set off a Rossby wave train and a north–south dipole that funneled moisture to East Antarctica, spawning atmospheric rivers and heavy snowfall that added about 695 billion tons to the ice sheet—the largest mass gain seen by GRACE. The effect is temporary and does not alter Antarctica's long-term ice loss; anthropogenic influence accounts for about 9% of the snowfall anomaly.

via Science Daily|
#antarctica#atmospheric-rivers#ice-sheets
Sailing to Greenland to chart ice-melt's impact on Atlantic currents
environment2 months ago

Sailing to Greenland to chart ice-melt's impact on Atlantic currents

A multinational team aboard the RRS Sir David Attenborough sails to Greenland to study tidewater glaciers and how melting ice sheets could rewire the North Atlantic Subpolar Gyre, with autonomous sensors and AI helping improve climate models; the six-week SE Greenland fjord campaign aims to reveal glacier–ocean interactions that could affect UK rainfall, storms, reservoirs and North Atlantic fisheries.

via BBC|
#climate-change#environment#giant-project
Mantle Waves Helped Antarctica Freeze Ahead of the Arctic
science3 months ago

Mantle Waves Helped Antarctica Freeze Ahead of the Arctic

A new study argues that deep-Earth mantle waves, triggered during the Gondwana breakup, uplifted East Antarctica around 45 million years ago. This uplift raised elevations high enough for snow to persist, allowing the East Antarctic ice sheet to form by about 34–35 million years ago and contribute to global cooling. The Arctic, lacking similar high terrain, lagged behind by roughly 25 million years, with climate and CO2 declines later driving ice-age conditions. The work suggests geology helped set the stage for ice sheets long before climate alone made the poles cold.

via The Conversation|
#antarctica#geology#ice-sheets
Thin Ice and Light Winds Move Death Valley's Sailing Stones
science3 months ago

Thin Ice and Light Winds Move Death Valley's Sailing Stones

Scientists confirmed how the famous sailing stones at Racetrack Playa move: during a rare winter, a shallow pond freezes into a 3–6 mm ice sheet that cracks into panels; a light breeze pushes these panels, sliding heavy rocks across the mud at a walking pace. The 2013–2014 study installed a weather station, time-lapse cameras, and GPS loggers, capturing major moves (one rock ≈65 m in 16 minutes; total trails up to 224 m) and showing that movement is episodic and dependent on precise conditions, while older theories of hurricane winds or thick ice are unlikely. The finding explains many trails, though not all on the playa, and highlights how subtle forces can shape dramatic landscapes.

via Space Daily|
#death-valley#gps-tracking#ice-sheets
Ocean Warming and Ice Melt Push Global Sea Levels Higher, Study Finds
environment4 months ago

Ocean Warming and Ice Melt Push Global Sea Levels Higher, Study Finds

Global sea levels are rising at an accelerating pace driven mainly by warming oceans expanding water, with glaciers and ice sheets contributing increasingly; improved satellite and tide-gauge measurements close a long-standing discrepancy between observations and known causes, and scientists warn sea levels will keep rising for centuries due to climate inertia.

via ScienceDaily|
#environment#glaciers#ice-sheets
Antarctica’s Hidden Gravity Hole Points to Deep-Earth Roots of Its Ice Sheets
earth-and-climate7 months ago

Antarctica’s Hidden Gravity Hole Points to Deep-Earth Roots of Its Ice Sheets

Scientists mapped a gravity low beneath Antarctica caused by extremely slow deep-Earth rock movements over tens of millions of years. The anomaly strengthened between about 50 and 30 million years ago, coinciding with the emergence of Antarctica’s vast ice sheets, suggesting mantle dynamics may have helped shape surface ice and sea level. Using earthquake data like a planetary CT scan and computer models, researchers reconstructed the gravity hole’s history and plan to explore how these interior processes influence climate.

via ScienceDaily|
#antarctica#earth-and-climate#earthquakes
Antarctic gravity low strengthens as mantle dynamics reshape the geoid
science7 months ago

Antarctic gravity low strengthens as mantle dynamics reshape the geoid

Scientists mapped Earth’s interior with earthquakes to build a 3D mantle model and a map of the Antarctic Geoid Low, finding the depression has persisted for about 70 million years but has intensified over the last 40–50 million years as subducted slabs sank and buoyant mantle material rose. The results, which also align with true polar wander, suggest deep Earth processes can subtly shift sea level and influence the growth of Antarctica’s ice sheet; the work was published in Scientific Reports.

via ScienceAlert|
#antarctic-geoid-low#gravity-field#ice-sheets
Scientists warn of irreversible Antarctic changes and potential catastrophe
science9 months ago

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
Satellite Data Confirms Accelerating Sea-Level Rise and Future Risks
science1 year ago

Satellite Data Confirms Accelerating Sea-Level Rise and Future Risks

Satellite data from 1993 to 2023 confirms that sea levels are rising faster than expected, validating early climate models and highlighting the significant role of melting ice sheets and regional differences. Continued monitoring is essential for refining future projections and implementing targeted interventions for vulnerable coastal areas.

via Indian Defence Review|
#climate-change#ice-sheets#regional-variability