Progress & Accomplishments

Modeling the role of vegetation-induced preferential snow accumulation in open talik development and hillslope groundwater flow in a transitional permafrost landscape

The role of distributed snow on permafrost distribution along the hillslope at Teller field site

Schematic representation of the distributed snow depth where tall shrubs trap more snow than surrounding tundra affecting permafrost distribution and form new pathways for groundwater flow.

Convolutional neural network approach for mapping Arctic vegetation using multi-sensor remote Sensing fusion

Deep learning models achieve multi-sensor remote sensing fusion for mapping of Arctic vegetation

These panels show a landscape swath over which multiple remote sensing data collected in an area near Kougarok in the Seward Peninsula of Alaska. (a) Unsupervised cluster analysis classification map (k = 25) using EO-1, Landsat 8 OLI, ALOS-1, PALSAR, SPOT

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.

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

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

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).

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.

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

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.

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

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

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

NGEE Arctic

Next-Generation Ecosystem Experiments

Progress & Accomplishments

Modeling the role of vegetation-induced preferential snow accumulation in open talik development and hillslope groundwater flow in a transitional permafrost landscape

Schematic representation of the distributed snow depth where tall shrubs trap more snow than surrounding tundra affecting permafrost distribution and form new pathways for groundwater flow.

Convolutional neural network approach for mapping Arctic vegetation using multi-sensor remote Sensing fusion

These panels show a landscape swath over which multiple remote sensing data collected in an area near Kougarok in the Seward Peninsula of Alaska. (a) Unsupervised cluster analysis classification map (k = 25) using EO-1, Landsat 8 OLI, ALOS-1, PALSAR, SPOT

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

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

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

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).

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

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

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

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

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

Metadata and NGEE Arctic Search Tool Metrics

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

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

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