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Greenland Ice Sheet

All articles tagged with #greenland ice sheet

Warming Oceans and Ice Melt Confirmed as Primary Drivers of Global Sea-Level Rise
science20 hours ago

Warming Oceans and Ice Melt Confirmed as Primary Drivers of Global Sea-Level Rise

A new Science Advances study shows global mean sea level has risen about 2.06 mm/year since 1960 and accelerated to 3.94 mm/year from 2005–2023, with ocean warming accounting for about 43% of the rise and ice melt from glaciers (27%), Greenland (15%), and Antarctica (12%) becoming larger contributors over time; corrections to satellite data and tide gauges resolve a long-standing measurement gap, and scientists warn sea level will keep rising for centuries even if emissions stabilize.

via SciTechDaily|
#antarctic-ice-sheet#glaciers#greenland-ice-sheet
Earth Nears Irreversible Climate Tipping Points, Scientists Warn
environment3 months ago

Earth Nears Irreversible Climate Tipping Points, Scientists Warn

Scientists warn Earth is approaching multiple tipping points in climate systems—including the Greenland and West Antarctic ice sheets, boreal permafrost, and the Amazon—raising the risk of a ‘hothouse Earth’ with about 9°F of warming; current climate commitments are insufficient, and entrenched power structures complicate a just, effective transition.

via Futurism|
#amazon-rainforest#climate-change#environment
New Evidence Reveals Cause of Greenland Ice Sheet Mystery
science8 months ago

New Evidence Reveals Cause of Greenland Ice Sheet Mystery

New research suggests that a platinum spike found in Greenland's ice core around 12,800 years ago, previously thought to indicate a meteorite impact, was likely caused by a volcanic fissure eruption in Iceland, which may have contributed to the onset of the Younger Dryas cold period by releasing sulfur and heavy metals into the atmosphere. This finding challenges the impact hypothesis and highlights the role of volcanic activity in past climate shifts, emphasizing the importance of understanding such events for future climate predictions.

via The Conversation|
#climate-change#greenland-ice-sheet#platinum-spike
Decades-Old Climate Predictions on Sea Level Rise Confirmed
science9 months ago

Decades-Old Climate Predictions on Sea Level Rise Confirmed

A recent study confirms that climate projections from the mid-1990s accurately predicted global sea-level rise over the past three decades, though they underestimated ice melt contributions. Satellite data has been crucial in tracking these changes, revealing that sea levels are rising faster than initially thought, with regional variability influenced by ice sheet dynamics. The findings underscore the importance of refining localized forecasts to better prepare vulnerable regions for future sea-level rise.

via SciTechDaily|
#climate-change#greenland-ice-sheet#ice-melt
Seafloor Fibre Sensing Unveils Calving Impact on Fjord Dynamics
science9 months ago

Seafloor Fibre Sensing Unveils Calving Impact on Fjord Dynamics

The article discusses how seafloor fibre sensing technology, specifically DAS and DTS, is used to study calving-driven fjord dynamics and ice-ocean interactions at Greenland's glaciers, revealing detailed processes such as fracturing, iceberg detachment, tsunamis, internal waves, and seafloor currents, which are crucial for understanding and modeling glacier mass loss and sea level rise.

via Nature|
#fibre-sensing#fjord-dynamics#greenland-ice-sheet
"Scientists Uncover Key Missing Element in Climate Models"
science1 year ago

"Scientists Uncover Key Missing Element in Climate Models"

Researchers from UC Irvine and the University of Michigan have identified that a commonly used climate model overestimates the albedo of ice by about 5%, leading to underestimations of ice melt. By incorporating more accurate ice reflectivity data, the model now shows the Greenland Ice Sheet melting at a rate of six gigatons more than previously estimated. This finding highlights the importance of accounting for microphysical properties of ice, such as the effects of algae and dust, in climate models.

via Phys.org|
#albedo#climate-change#climate-models
"Atlantic Ocean Circulation Collapse: Iceberg History Offers Clues"
environment2 years ago

"Atlantic Ocean Circulation Collapse: Iceberg History Offers Clues"

Recent research suggests that while Greenland's ice loss is significant, it is unlikely to continue long enough to shut down the Atlantic Ocean circulation system in the coming decades. Historical evidence shows that icebergs, which are more effective at disrupting ocean currents, are less likely to form in the future due to the receding ice sheet. Although the Atlantic Meridional Overturning Circulation (AMOC) is projected to decline, the risk of an imminent collapse is lower than some fear, but climate change mitigation remains crucial.

via The Conversation Indonesia|
#atlantic-ocean#climate-change#environment
"Rapid Melting: Uncovering Greenland's Impact on Ice Motion"
earth-and-environment2 years ago

"Rapid Melting: Uncovering Greenland's Impact on Ice Motion"

A study published in Geophysical Research Letters found that late-season melting events on the Greenland Ice Sheet have minimal impact on its annual motion, despite causing temporary accelerations in ice flow. The research, led by Ryan Ing and colleagues, used satellite imagery and meteorological data to analyze the effects of intense melting events in 2022. While these events led to short-lived increases in ice motion, they did not significantly affect the overall annual ice discharge. However, the study highlighted the significant role of late-season melt events in intensifying surface melting and increasing annual meltwater runoff, which could have broader implications for ice sheet mass loss as Earth's climate continues to warm.

via Phys.org|
#climate-change#earth-and-environment#greenland-ice-sheet
"Modeling Study Suggests Geoengineering Could Slow Greenland Ice Sheet Loss"
science2 years ago

"Modeling Study Suggests Geoengineering Could Slow Greenland Ice Sheet Loss"

A modeling study led by an international team of researchers has found that a geoengineering technique called stratospheric aerosol injection (SAI) could potentially slow down the loss of the Greenland Ice Sheet. The study simulated the effects of SAI on ice sheet melting and found that under the scenario involving SAI, ice loss from the Greenland Ice Sheet would be limited, potentially reducing sea-level rise. However, the researchers caution that geoengineering is a highly contentious topic and may only address the symptoms of global warming without tackling the root causes, with unpredictable positive and negative outcomes.

via Phys.org|
#climate-change#geoengineering#greenland-ice-sheet
Imminent Catastrophic Climate Tipping Points: Urgent Action Needed
environment2 years ago

Imminent Catastrophic Climate Tipping Points: Urgent Action Needed

A new scientific report warns that continued global warming could trigger catastrophic tipping points in the Earth's climate system, leading to irreversible consequences. The collapse of the Greenland ice sheet, unstoppable ice loss in West Antarctica, permafrost thawing, coral die-offs, and the collapse of ocean currents are among the potential tipping points. The report emphasizes the urgent need for a rapid phase-out of greenhouse gas emissions and a global commitment to reach net-zero emissions by 2050. It also calls for strengthening global frameworks for adapting to climate impacts, investing in scientific research on tipping points, and triggering positive tipping points through low-carbon transitions.

via POLITICO|
#climate-change#emissions-reduction#environment