Advancing the predictive power of Earth system models through understanding
of the structure and function of Arctic terrestrial ecosystems
Progress & Accomplishments
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.
Plant Traits Across an Arctic Landscape: Above versus Belowground
NGEE Arctic researchers are quantifying above and belowground variation in plant functional traits across environmental gradients to inform the representation of plant traits in terrestrial biosphere models.
Evapotranspiration across Plant Types and Geomorphological Units in Polygonal Arctic Tundra
A field research showed that evapotranspiration from mosses and open water was twice as high as that from lichens and bare ground, and that microtopographic variations in polygonal tundra explained most of this and other spatial variation
