Advancing the predictive power of Earth system models through understanding
of the structure and function of Arctic terrestrial ecosystems
Progress & Accomplishments
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
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.
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
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.
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
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.
NGEE Arctic Scientists Co-organize Symposium on Trait Covariation
Scientists around the world are working to simplify the vast array of plant species and forms in order to distill general features of plant function, structure, and strategy.
