Science Highlights

New Model Predicts Soil Drainage

An analytical model predicts how ice-wedge polygon geometry influences the export of solute-rich waters from tundra soils to ponds and streams.

Hybrid-energy module for remote environmental observations, instruments, and communications

New technology adds value to monitoring, observational, and experimental sites in remote areas.

A reporting format for leaf-level gas exchange data and metadata

NGEE Arctic investigators and others provide “best practices” on data and metadata from field gas-exchange measurements.

Permafrost promotes shallow groundwater flow and warmer headwater streams

Model-data integration with international partner highlights how thawing permafrost can impact conditions of water discharged to near-by streams.

Integrating Arctic plant functional types in a land surface model using above- and below-ground field observations

Field observations of community composition improve how plant functional types (PFT) are represented in E3SM simulations.

Arctic soil patterns analogous to fluid instabilities

Inspired by fluid instabilities, NGEE Arctic researchers developed a mathematical theory that predicts solifluction lobe development.

Wetland CH4 Flux Temperature Hysteresis Explained by Substrate Availability and Microbial Activity

Using a mechanistic ecosystem model, ecosys, to demonstrate that static temperature relations cannot accurately predict wetland CH4 production and emission rates due to substrate-mediated microbial and abiotic interactions.

Alaskan carbon-climate feedbacks will be weaker than inferred from short-term manipulations

Using a mechanistic land model, Ecosys, to demonstrate that short-term (< 10 year) warming experiments produce emergent ecosystem carbon stock temperature sensitivities inconsistent with multi-decadal responses due to the tightly coupled, nonlinear nature of high-latitude ecosystems

Coupling Surface and Subsurface Hydrology in Complex Terrain

A novel mathematical formulation allows accurate solution of water flow in geometrically complicated soil structures, including overturned soil layers and other soil disturbance.

Soil Geochemistry an Important Factor Influencing the rate and Magnitude of Greenhouse Gas Production in Tundra Soils

Rates and controls on CO2 and CH4 production were observed for two contrasting water‐saturated tundra soils within a permafrost‐affected watershed near Nome, AK.