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.
Tundra
Posted inNews
Testing on the Tundra: NASA Snow Program Heads North
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.
Posted inResearch Spotlights
A Census of Snowdrifts in Northern Alaska
Snowdrifts prove less ephemeral than they might seem, occurring in the same places year after year.
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Drones Help Bridge the Gaps in Assessing Global Change
New instruments in the research tool kit bolster scientific understanding of the ecology of a greening Arctic.
Posted inEditors' Highlights
Downhill from Here: Landscape Positions and Greenhouse Emissions
In comparing soils from two tundra wetland landscape positions, landscape position is found to matter, and toeslopes are associated with higher greenhouse gas production.
Posted inNews
Turning the Arctic Brown
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.”
Posted inResearch Spotlights
Methane-Releasing Tundra Soils Freezing Later Each Year
Scientists find links between delayed freezing of Alaskan soils and higher atmospheric methane concentrations during the cold season.
Posted inResearch Spotlights
Tracking Nitrogen in Arctic Plants
Prevailing nutrient uptake models do not fit Arctic plants. Scientists test a new option that overcomes older models’ shortcomings.
Posted inResearch Spotlights
High Arctic Emissions of a Strong Greenhouse Gas
Isotope data bring scientists one step closer to revealing the microbial processes behind nitrous oxide emission in the tundra.
Posted inNews
Aquatic Plants May Accelerate Arctic Methane Emissions
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.