Progress and Accomplishments

Modeled net biome productivity of (a) tussock tundra and (b) boreal site during 2003 and 1920 fire events respectively in Alaska.

Modeling the impacts of fire on surface energy and land-atmosphere carbon exchange across Alaska

Impacts of fire on the long-term net ecosystem productivity were modeled across selected sites in Alaska.

Biomass of root nodules (a), basal area (b), and height (c) of alders at the Kougarok hillslope that grow in water tracks (teal) and dense shrublands (light blue).

Symbiotic N-fixation by alder impacts nitrogen availability on a landscape scale

Nitrogen fixed within root nodules of alder growing in dense shrublands is associated with higher levels of local N availability. The inclusion of a plant functional type based on this N-fixing shrub may improve earth system models’ ability to capture nit

Simulated soil organic carbon (SOC) and net primary productivity (NPP) by ELM & ELM-PFLOTRAN compared to other datasets at the Barrow site, AK

Coupling PFLOTRAN into E3SM through collaboration between the CMDV and NGEE Arctic projects

The NGEE Arctic PFLOTRAN biogeochemistry (BGC) is coupled to the E3SM Land Model (ELM) through a generic interface and the ELM-PFLOTRAN is being evaluated at both point and global scales.

Key processes in the anaerobic carbon decomposition framework, including solid and aqueous phases, coupled to anaerobic respiration.

Modeling anaerobic soil organic carbon decomposition in Arctic polygon tundra: Insights into soil geochemical influences on carbon mineralization

Linking soil geochemistry with carbon decomposition improves predictions of CO2 and CH4 production along fine-scale hydrological variabilities in Arctic soil and permafrost.

Factors affecting the spatial pattern of snow distribution at the NGEE Arctic Teller and Kougarok watersheds

High resolution snow data collected from two small catchments in the southern Seward Peninsula was used to identify key factors that control snow distribution, quantify the relative impacts of those factors and improve the snow representation for the arct

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Metadata and NGEE Arctic Search Tool Metrics

View metrics about the NGEE Arctic metadata records and data downloads

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High Spatial Resolution Modeling of the Ground Temperature Dynamics in the Seward Peninsula

UAF researchers working on the NGEE Arctic project validated the GIPL model and simulated ground temperature dynamics for the entire Seward Peninsula according to the RCP4.5 climate scenario.

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A Subgrid Approach for Modeling Microtopographic Effects on Overland Flow: Application to Polygonal Tundra

The effects of fine-scale topography can be represented in models with coarser spatial resolution through the use of a new subgrid model, thus enabling computationally demanding integrated surface/subsurface hydrology models to be used at field scales

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Microtopography Determines How CO2 and CH4 Exchanges Respond to Temperature and Precipitation at an Arctic Polygonal Tundra Site

Microtopography in polygonal tundra affects CO2 and CH4 emissions, but landscape scaling of polygon types accurately captures landscape-scale states and exchanges with the atmosphere.

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NGEE Arctic Scientist Writes about Career, Mentoring, and the Value of Good Colleagues

Raised amidst the cornfields and grasslands of Mid-America, this NGEE Arctic researcher has passion and curiosity for people and the plant sciences.