Progress and Accomplishments

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Predicted decomposition dynamics for a Century-like biogeochemical network that includes carbon, nitrogen, and phosphorus. “CLM-1” and “CLM-2” are ad hoc approaches based on CLM4.5BGC; “New” is our flux-limiter approach; “mBBKS” is the global flux-limiter

A Generic Law-of-the-Minimum Flux Limiter for Simulating Substrate Limitation in Biogeochemical Models

Complex biogeochemical networks that include many biotic and abiotic processes can be limited by different substrates under different conditions during their temporal evolution.

Conceptual model of anaerobic labile soil organic carbon (SOC) degradation pathways in the active layer of polygonal tundra upon warming.

Uncovering Labile Soil Organic Matter Degradation Pathways in Polygonal Tundra

Permafrost thaw and climate warming accelerates frozen soil organic carbon (SOC) degradation and emission of greenhouse gases, but what specific degradation pathways for labile SOC occur prior to CH4 and CO2 production are not well understood.

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New Website for NGEE Arctic

The NGEE Arctic website, to be released later in April, will have a new look and feel moving from an unsupported Drupal 6 into Drupal 7.

NGEE Arctic Data Management Team Working with NGEE Tropics

The ORNL NGEE Arctic Data Management Team (DMT) is lending expertise and tools deployed for the NGEE Arctic data effort to the NGEE Tropics project. The DMT has deployed a multi-faceted system for NGEE Arctic comprised of the On-line Metadata Editor (OME)

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The total number of metadata records available highlighting the number of publicly available datasets and documentation plus the number of planned datasets.

Metadata and NGEE Arctic Search Tool Statistics - March 31, 2016

These statistics reflect metadata submission and usage of the NGEE Arctic Search Tool since its implementation in the spring of 2014. Metadata records reflect a combination of data, information and documentation that form a collection. While all metadata

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Greenhouse gas emissions, classified by polygon type, position, and measurement month. (a) Net CH4 flux in nmol CH4 m-2 s-1 and (b) ecosystem respiration in mol CO2 m-2 s-1 were measured from each feature of 4 flat/high-centered (FHC) and 3 low-centered

LBNL Researchers Evaluate Methane Production, Oxidation, and Emissions Across Polygon Tundra Gradients

In an upcoming paper in Global Change Biology, LBNL researchers Lydia Smith Vaughn, Mark Conrad, Markus Bill, and Margaret Torn present results of a two-year field methane study in the Barrow Environmental Observatory.

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The relative influence of peat, surface and subsurface water, and snow on active layer thickness

Model simulations by LANL scientists were used to assess the relative effect of environment on active layer thickness.

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NGEE Arctic scientists at BNL evaluate zero-power method of warming tundra ecosystems

Current approaches to raising air temperatures are plagued by needing access to electrical power. Scientists on the NGEE Arctic problem are working to overcome that common constraint…

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A rock physics investigation of unconsolidated saline permafrost: P-wave properties from laboratory ultrasonic measurements

Researchers at LBNL apply seismic methods to examine characteristics of saline permafrost from coastal plain, Barrow, AK.

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UAF’s Vladimir Romanovsky named as NGEE Arctic new Chief Scientist

NGEE Arctic thanks Larry Hinzman for his contributions to Phase 1 and welcomes Vladimir Romanovsky in his expanded role as Chief Scientist.