Science Highlights

April 3rd, 2017

The ability to map snow depth in high resolution and over a large areas permits for the first time a dataset that can be used to quantify the impact of heterogeneous snow distribution on hydrology and carbon exchange.

October 18th, 2016

Rapid warming in the Arctic is leading to the thawing of carbon-rich soils that have been permanently frozen for millennia. The release of greenhouse gases from thawed permafrost could increase the rate of global warming, but this depends on the amount of carbon released into the atmosphere, and whether carbon is released as carbon dioxide or the more potent greenhouse gas methane.

April 24th, 2016

Results show that climate warming and permafrost thaw could potentially enhance methylmercury toxin production by an order of magnitude, impacting Arctic terrestrial and aquatic ecosystems by increased exposure to mercury through bioaccumulation and biomagnification in the food web.

Progress and Accomplishments

The Alaska Arctic Vegetation Archive (AVA-AK)

NGEE Arctic scientists contribute to an international database of vegetation data from the Alaskan Arctic tundra

Modeling the Spatiotemporal Variability in Subsurface Thermal Regimes across a Low-Relief Polygonal Tundra Landscape

Study develops an end-to-end high resolution modeling framework to simulate permafrost thermal dynamics of microtopography dominated polygonal tundra landscape

UAF Researchers “Scale Up” Permafrost Thermal Measurements in Western Alaska Using an Ecotype Approach

Field scientists develop a ground temperature map for western Alaska based on measured relationships between ground thermal regimes and vegetation ecotypes