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Greenland

Photo of an ocean with snow-capped mountains in the background.
Posted inEditors' Vox

Marine Sediments Reveal Past Climate Responses to CO2 Changes

by Sze Ling Ho and Erin McClymont 21 September 202320 September 2023

Climate records stored in marine sediments reveal different ice sheet and ocean responses to falling atmospheric CO2 concentrations from the warm Pliocene to the ice ages of the Pleistocene.

Three soil blocks from a subice core taken in Camp Century, Greenland
Posted inNews

Greenland Was Much Greener 416,000 Years Ago

by Bill Morris 31 August 20238 September 2023

A fresh analysis of a historic ice core has revealed evidence of a much smaller ice cap.

A four-legged animal with furry brown hair and a pair of curved, tan horns stands on grassy ground behind a rock, and a younger animal of the same breed appears in the background.
Posted inNews

Herbivore Diversity Helps Maintain Arctic Tundra Diversity

Katherine Kornei, Science Writer by Katherine Kornei 11 August 202311 August 2023

A long-term experiment in southwestern Greenland reveals that the presence of musk oxen and caribou helps stave off declines in Arctic tundra diversity brought on by climate change.

Maps showing the high-resolution ocean model ECCO.
Posted inEditors' Highlights

Going with the Flow: New Tool Improves Sea Level Projections

by Nicholas Golledge 4 May 20231 May 2023

By bringing together multiple data sources a new statistical method aims to improve the accuracy with which we might predict future ice melt in Greenland.

The lower part of Bear Glacier, Alaska, tripled in velocity in 2019, a phenomenon largely attributable to an ice-dammed lake suddenly draining through it.
Posted inFeatures

Redefining “Glacial Pace”

Damond Benningfield, Science Writer by Damond Benningfield 24 April 202324 April 2023

As Earth’s climate warms, glaciers and ice sheets are retreating, cracking, and adding to sea level rise at record speeds.

A chunk of coastal permafrost has toppled into the sea along Alaska’s northernmost shores.
Posted inEditors' Vox

What We Know and Don’t Know About Climate Tipping Elements

by Seaver Wang 12 April 202311 April 2023

As climate change continues, parts of the Earth system such as ice sheets, frozen soils, or the Amazon rainforest could shift—some quickly, some slowly—after crossing key thresholds or tipping points.

Image depicting Viscosity estimates for the mantle underneath Greenland.
Posted inEditors' Highlights

4D Viscosity Constraints from Greenland 

by Thorsten Becker 28 March 202311 April 2023

The mantle’s resistance to flow appears different for glacial and plate tectonic timescales but this behavior can be reconciled with new thermo-mechanical models of the asthenosphere.

Aerial image of the 1952 landslide showing the debris path that leads into the ocean
Posted inNews

A 1952 Landslide Hints at Early Permafrost Thaw in the Arctic

by Andrew Chapman 22 March 20234 April 2023

Scientists took a deeper look at a 70-year-old slide and found that climate change likely set the stage for the disaster.

Riverbed construction
Posted inFeatures

Grains of Sand: Too Much and Never Enough

by Alka Tripathy-Lang 25 January 202317 February 2023

Sand is a foundational element of our cities, our homes, our landscapes and seascapes. How we will interact with the material in the future, however, is less certain.

Photo of a polar bear and two cubs traversing a field of snow and ice
Posted inNews

Glacial Ice Offers Polar Bears a Precarious Climate Refuge

by Elise Cutts 9 December 202222 March 2023

An isolated polar bear population in southeastern Greenland survives in fjords, despite spotty sea ice. But this pocket of bears is not a sign of how the species could be saved.

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Features from AGU Journals

RESEARCH SPOTLIGHTS
Geophysical Research Letters
“Neural Networks Map the Ebb and Flow of Tiny Ponds”
By Sarah Derouin

EDITORS' HIGHLIGHTS
Community Science
“Collaboration Helps Overcome Challenges in Air Quality Monitoring”
By Muki Haklay

EDITORS' VOX
Reviews of Geophysics
“What We Know and Don’t Know About Climate Tipping Elements”
By Seaver Wang

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