Tag

Ice Sheets

All articles tagged with #ice sheets

earth-and-climate1 month ago•6 min saved

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

science1 month ago•5 min saved

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

science3 months ago•3 min saved

Century-Old Desert Rocks Move on Their Own, Revealing the Mystery

Scientists finally uncovered the mystery of the moving rocks in Death Valley's Racetrack Playa, revealing that delicate sheets of ice, formed overnight and melted in the sun, along with light winds, gently push the rocks across the desert floor, leaving trails that have puzzled observers for over a century.

via The Daily Galaxy|

#death-valley #geology #ice-sheets

science3 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

science5 months ago•3 min saved

Unveiling Antarctica's Hidden Secrets: Submersible Discoveries Beneath the Ice

NASA and BAS revealed detailed images of Antarctica's hidden terrain beneath the ice, showing a rugged landscape that influences ice flow and global sea levels, with implications for understanding climate change and future sea-level rise.

via Indian Defence Review|

#antarctica #climate-change #ice-sheets

science5 months ago•3 min saved

Greenland's Shape and Position Are Changing Due to Melting Ice

Greenland's landmass is experiencing complex movements due to tectonic activity and the lingering effects of past ice sheets, with recent research revealing that mantle adjustments from ice sheet retreat are causing the island to twist, lift, and shrink in ways that could impact navigation and our understanding of Earth's history.

via Live Science|

#climate-change #greenland #ice-sheets

science6 months ago•4 min saved

Discovery of 85 New Subglacial Lakes Beneath Antarctica

Researchers using ESA's CryoSat satellite data have discovered 85 new subglacial lakes beneath Antarctica, increasing the known active lakes to 231, which are crucial for understanding ice sheet dynamics and potential impacts on global sea levels.

via European Space Agency|

#antarctica #cryosat #ice-sheets

environment7 months ago•7 min saved

Antarctica's Rapid Ice Loss Threatens Global Sea Levels

Antarctica is experiencing rapid and potentially irreversible environmental changes, including significant sea ice loss and warming of surrounding waters, which threaten to accelerate ice sheet collapse and cause global sea level rise, emphasizing the urgent need to reduce greenhouse gas emissions.

via Gizmodo|

#antarctica #climate-change #environment

science7 months ago•4 min saved

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

environment7 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

science10 months ago•2 min saved

Scientists Uncover Ancient Antarctic Ecosystem and Hidden Mountain Range

Scientists from the University of Wisconsin and University of Colorado have discovered new evidence suggesting a more dynamic and complex geological history of Antarctica, particularly involving the Transantarctic Mountains, which may have significantly influenced the continent's glacial cycles and climate history.

via Yahoo|

#antarctica #geology #glacial-cycles

science10 months ago•2 min saved

Scientists Reveal Hidden 34-Million-Year-Old World Beneath Antarctica's Ice

Scientists have discovered ancient mountain peaks buried beneath Antarctica's ice in the Transantarctic Mountains, revealing a complex geological history involving multiple mountain-building and erosion events linked to tectonic shifts and glaciations, including a major glacial period around 300 million years ago that influenced the development of the continent's ice sheets.

via Indian Defence Review|

#antarctica #geology #ice-sheets

scienceenvironment2 years ago•0 min saved

"Visualizing the Transformation of Antarctica's Glaciers and Ice Sheets"

Turkey's 8th National Antarctic Science Expedition is conducting 22 projects to study the impact of climate change on Antarctica's glaciers and ice sheets. Anadolu Agency's photojournalist Sebnem Coskun is documenting the expedition's scientific research and life in the region to share the findings with the world, aiming to uncover concealed data within the ice gathered from years of research.

via The Guardian|

#antarctica #climate-change #glaciers

climate-change2 years ago•0 min saved

Unprecedented Ice Loss: Antarctic Glaciers in Peril

Scientists warn that humanity has "lost control" of the Earth's ice sheets, as the melting of polar ice caps accelerates due to global warming. The loss of ice sheets contributes to rising sea levels, posing a significant threat to coastal communities and ecosystems worldwide. Urgent action is needed to mitigate the effects of climate change and reduce greenhouse gas emissions.

via Financial Times|

#climate-change #climate-crisis #environmental-impact

earth-and-environment2 years ago•4 min saved

"Antarctica's Ancient Ice Sheets: A Glimpse into Earth's Future"

Researchers have discovered evidence that Antarctica's ice sheets grew and receded more frequently during the Miocene epoch than previously known, with cycles of growth and recession occurring over just a few thousand years. This rapid volatility raises questions about the causes behind it. The findings, based on sediment records from the Antarctic Drilling Project, provide valuable insights into the behavior of ancient ice sheets and have implications for understanding the potential future changes in Antarctica's ice sheets under a warming climate. The fate of these ice sheets has significant consequences for global sea levels, ocean currents, marine food webs, and regional climates.

via Phys.org|

#antarctica #climate-change #earth-and-environment