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permafrost

Reindeer walking on snow in a forest
Posted inNews

Reindeer Could Trample Permafrost Thaw

by Kimberly M. S. Cartier 25 March 202031 January 2022

Thick, fluffy snow traps summer’s heat in the top layers of Arctic permafrost even as winter chills the air above. Grazing animals stomp that snow flat.

Researchers walk near the eroding shoreline on the southeast side of Qikiqtaruk (Herschel Island) off the coast of Yukon, Canada.
Posted inResearch Spotlights

Where Does the Carbon Go When Permafrost Coasts Erode?

by Kate Wheeling 7 November 20199 December 2021

Arctic coastlines have not been considered carefully in carbon cycles for long, but new research suggests that eroding permafrost may emit more greenhouse gases than previously thought.

Map of Kuparuk river floodplain showing elevation
Posted inEditors' Highlights

Permafrost Thaws Rapidly as Arctic River Flooding Increases

by Amy E. East 21 October 201920 October 2021

As climate warms, Arctic rivers carry higher flows and flood earlier in the spring, causing underlying permafrost to thaw rapidly.

A photograph of a collapse scar bog near Fairbanks, Alaska
Posted inNews

The Permafrost Listeners

by L. Joel 7 August 20199 August 2019

Geophysicists have discovered a way to monitor permafrost thaw by measuring seismic waves so gentle they don’t shake a thing.

researcher measures fall thaw depth at the Eight Mile Lake study site in interior Alaska
Posted inResearch Spotlights

How Nitrogen Contributes to Permafrost Carbon Dynamics

by Aaron Sidder 2 November 201818 October 2021

Nitrogen released into the soil from thawing permafrost in the Arctic could accelerate soil carbon decomposition and alter carbon dynamics, with global implications.

This aerial photo taken over Alaska shows one of the ways that thawing permafrost reshapes the landscape.
Posted inScience Updates

A Modeling Toolbox for Permafrost Landscapes

by I. Overeem, E. Jafarov, K. Wang, K. Schaefer, S. Stewart, G. Clow, M. Piper and Y. Elshorbany 28 September 20188 November 2021

A new resource makes it easier for researchers to explore predictions of how melting permafrost might affect carbon release, wetlands, and river deltas as they evolve and other interacting effects.

Posted inResearch Spotlights

A Deeper Understanding of Carbon Decomposition in Arctic Soils

by Terri Cook 22 March 20189 December 2021

Physical parameters may help scientists extrapolate Arctic carbon soil losses from the local to the regional scale, according to the results of a yearlong incubation experiment.

Erosion eats away at the permafrost of Canada’s Yukon Coastal Plain
Posted inResearch Spotlights

Carbon Release from Permafrost Erosion Along the Yukon Coast

by Sarah Stanley 16 March 201829 June 2022

New findings highlight the need to account for large amounts of ground ice contained in frozen soil when assessing Arctic carbon cycling.

Scientists use eddy covariance flux towers to measure methane release from permafrost near the Stampede Trail in Alaska.
Posted inScience Updates

Understanding High-Latitude Methane in a Warming Climate

by S. M. Miller, M. A. Taylor and J. D. Watts 13 March 20182 November 2021

Climate change could spur greenhouse gas release from the Arctic. A new project will synthesize existing data to improve uncertain predictions.

Small lakes dot the tundra north of Yellowknife, in Canada’s Northwest Territories.
Posted inNews

Airborne Surveys Examine Water Levels of Lakes Perched on Permafrost

by J. Leman 14 December 201730 September 2021

Do water levels in high-latitude Canadian lakes fluctuate as one body or as separate entities? The answer could reveal clues to how melting permafrost influences the environment.

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