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Tundra

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.

Map of Alaska showing the study regions and a bar graph showing wildfire events by year.
Posted inEditors' Highlights

Lightning in Alaskan Tundra Ignites Most Fires

by Valeriy Ivanov 19 July 202211 August 2022

Cloud-to-ground lightning is found to be the most important controller of wildfire occurrence in the Artic tundra of Alaska from 2001 to 2019.

A student takes notes in Arctic Alaska.
Posted inNews

Testing on the Tundra: NASA Snow Program Heads North

by J. Besl 27 July 202111 August 2022

With infrastructure, experience, and a slice of the world’s largest snow biomes, Alaska is an essential research destination for NASA’s multiyear SnowEx campaign.

Aerial view of snowdrifts at a lake in the northern foothills of the Brooks Range in Alaska
Posted inResearch Spotlights

A Census of Snowdrifts in Northern Alaska

by David Shultz 2 December 20208 February 2023

Snowdrifts prove less ephemeral than they might seem, occurring in the same places year after year.

Two scientists on the flat green tundra—one holds a drone aloft, and one writes in a notebook
Posted inNews

Drones Help Bridge the Gaps in Assessing Global Change

Lesley Evans Ogden, Science Writer by Lesley Evans Ogden 27 August 202011 August 2022

New instruments in the research tool kit bolster scientific understanding of the ecology of a greening Arctic.

Four plots showing production of greenhouse gases during laboratory incubations in organic soils and mineral soils, with and without nitrogen addition.
Posted inEditors' Highlights

Downhill from Here: Landscape Positions and Greenhouse Emissions

by W. M. Hammond 5 August 202011 August 2022

In comparing soils from two tundra wetland landscape positions, landscape position is found to matter, and toeslopes are associated with higher greenhouse gas production.

Yellow, dry grass; green trees; and blue cloudy sky
Posted inNews

Turning the Arctic Brown

by The University of Sheffield 19 September 20195 January 2023

For a generation, the tundra has seen an increasing growth of vegetation, a process known as Arctic greening. A more accurate term might be “Arctic browning.”

Aerial view over the Alaskan tundra showing patches of snow, ice, and bare land
Posted inResearch Spotlights

Methane-Releasing Tundra Soils Freezing Later Each Year

Sarah Stanley, Science Writer by Sarah Stanley 18 September 201911 August 2022

Scientists find links between delayed freezing of Alaskan soils and higher atmospheric methane concentrations during the cold season.

Sparse vegetation grows in special areas of the frosty soils in Komi Republic, in northwestern Russia.
Posted inResearch Spotlights

High Arctic Emissions of a Strong Greenhouse Gas

Sarah Stanley, Science Writer by Sarah Stanley 6 April 201711 August 2022

Isotope data bring scientists one step closer to revealing the microbial processes behind nitrous oxide emission in the tundra.

Methane-releasing vegetation flourishes in small freshwater Arctic tundra ponds
Posted inNews

Aquatic Plants May Accelerate Arctic Methane Emissions

by R. Heisman 22 September 201611 August 2022

About two thirds of the gas produced by a study area near Barrow, Alaska, came from increasingly abundant greenery covering only 5% of the landscape, researchers estimate.

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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
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“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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