NGEE Arctic | "...improving climate model predictions through advanced understanding of coupled processes in Arctic terrestrial ecosystems."

Data units ready for transport
Snowmachines ready for trip to field site
Transport of power and communication platform
Snow depth measurements at Teller field site
Double-checking safety equipment
Installation of tram across polygonal tundra
Power and communications unit near Council, AK
Shrub survey at Kougarok field site
DOE sponsors in Utqiagvik, AK
Scenic vista on the Seward Penninsula
Safety preparations at field site
Coastline of Norton Sound near Nome, AK
Winter commute to field sites
Helicopter drops off NGEE Arctic scientists
NGEE Arctic eddy covariance tower near Council, AK

Media Mentions

SnowEx Hackweek 2022

International Symposium on ice, snow, and water in a warming world

Methane in a Changing Arctic

Signals in Alaska's Snow Reveal a Great Change

UAF permafrost scientist stepping away after 30 years on semi-solid ground

New Understanding of the Arctic’s Carbon Cycle

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Science Highlights

The Arctic tundra biome continued to green in the past 10 years with historically high midsummer greenness measurements

Multiscale remote sensing technologies are helping researchers better understand the effects of climate change on vegetation productivity and regional variability in greening and browning trends.

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Magnitude of the trend in MaxNDVI for the 39-year period 1982–2020 based on the AVHRR GIMMS-3g+ dataset.

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.

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A schematic of the model, which uses fundamental hydrologic principles to simulate the flushing of water from the central depression of an ice wedge polygon outward toward the trough.

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

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

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Hybrid-energy module deployed near Council, AK for year-round power, data acquisition, and satellite communications.

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.

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Relationships between gas exchange measurements and the components of this data and metadata reporting format. Data tables, methods metadata, instrument details and the complete instrument output are required to be included in a data package.

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Progress & Accomplishments

NGEE Arctic Mid-Phase Review: Phase 3 (2019–2024)

A conspicuous signal of climate change in high-latitude tundra

Observed spatial variability of soil pore water geochemistry

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Publications

Iron and iron-bound phosphate accumulate in surface soils of ice-wedge polygons in arctic tundra

Temporal, Spatial, and Temperature Controls on Organic Carbon Mineralization and Methanogenesis in Arctic High-Centered Polygon SoilsData_Sheet_1.docx

Triose phosphate utilization limitation: an unnecessary complexity in terrestrial biosphere model representation of photosynthesis

A best-practice guide to predicting plant traits from leaf-level hyperspectral data using partial least squares regressionAbstract

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