Science Highlights | NGEE Arctic

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.

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Model-data Comparison Highlights Overlooked Processes in Models of Soil Moisture and Hydrology

Most models project a long-term drying of the surface soil for the permafrost region despite increases in the net air–surface water flux.

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Bromide Tracer Studies Quantify Vertical and Horizontal Flow in Low- and High-centered Polygons

The study provides new insight into hydrological processes of low- and high-centered polygon systems, where flow and transport field investigations are almost totally lacking.

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Creating a Safe, Secure, Open, and Inclusive Project

Leadership team takes time and intentional steps to build a culture of safety and respect across the project.

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Impacts of Stoichiometry Traits on Carbon Accumulation using the E3SM Land Model

Plant stoichiometric flexibility controls the CO2 fertilization effect on ecosystem carbon accumulation.

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Arctic Soil Governs Whether Climate Change Drives Losses or Gains in Soil Carbon

Multiple models are needed to capture true uncertainty of soil carbon fate in a changing world.

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Understanding Vertical and Horizontal Flow in Ice-Wedge Polygons

Novel bromide tracer experiments are used to develop a model of subsurface flow and transport within ice-wedge polygons.

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Unfrozen Permafrost Presence in Shrub-Dominated Landscapes

Field observations and model simulations confirm the presence of unfrozen permafrost in shrub-dominated landscapes.

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Tundra Plant Trait Database

Worldwide trait database addresses long-standing questions about trait-environment relationships and provides an unprecedented digital resource to inform Earth system models.

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Mapping Vegetation Communities using Convolutional Neural Networks

Artificial intelligence applied to multiple remote sensing datasets accurately represents shrub distribution across hillslopes at the Kougarok field site.

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Depiction of vegetation community type computing.