Progress & Accomplishments

Iron and Iron-Bound Phosphate Accumulate in Soils of Polygonal Tundra

Geochemical and spectroscopic characterization of active-layer soil indicate near-surface accumulation of iron oxides that sequester the nutrient phosphate.

ORNL’s Misha Krassovski Supports International MOSAiC Expedition

Seasoned by the NGEE Arctic project, scientist gets tapped for a new opportunity.

NGEE Arctic Contributes to NOAA’s 2019 Arctic Report Card

NGEE Arctic contributed to the Arctic Report Card chapter on ’Tundra Greenness’ including changes in the cover of alder shrubs that impact local nutrient cycling.

NGEE Arctic Continues to Have a Strong Presence at the American Geophysical Union (AGU) Meetings

Numerous posters, oral, and organized sessions submitted to AGU continue to highlight science and science leadership by members of the NGEE Arctic project.

NGEE Arctic Returns to San Francisco for its Ninth All-Hands Meeting

Scientists from across the country gather for their ninth annual NGEE Arctic All-Hands meeting to celebrate success and discuss progress and plans for the project.

Investigations of topographic control on thermokarst development and the ground thermal regime in ice wedge polygons using the Advanced Terrestrial Simulator

NGEE Arctic researchers found that rim height and trough depth in ice wedge polygons considerably influence the vulnerability of the underlying permafrost, shaping feedbacks which ultimately control topographic deformation and increased soil aeration in t

Snapshot of simulated snowpack surface (cyan line) and ground temperature in a low centered polygon on December 24, 2014, demonstrating that rims function as preferential outlets of subsurface heat in winter, becoming the coldest zone of the polygon.

NGEE Arctic scientists attend NASA ABoVE annual meeting

Shawn Serbin represented NGEE Arctic at the NASA ABoVE meeting, showcasing our science and identifying opportunities for synergy with NASA ABoVE.

NASA ABoVE group photo including NGEE Arctic scientists, Shawn Serbin (top left) and Eugenie Euskirchen (bottom left).

Characterization of permafrost landscapes using an unmanned aerial system: LiDAR mapping the NGEE Arctic Teller field site

A state-of-the-art unmanned aerial system was deployed to collect centimeter-resolution imagery and topographic data of the NGEE Teller research site.

Examples of the collected data (e.g. LiDAR and aerial imagery) and products (Digital Elevation model) using UAS at NGEE Teller research site.

Impacts of microtopography on hydrologic and thermal states in an Arctic ecosystem: A case study using ELM-3D v1.0

Using a new three-dimensional hydrological and thermal capability in ELM (ELM-3D), scientists at LBNL analyzed the role of snow redistribution and lateral interconnectivity on soil temperatures and active layer.

Comparison of soil temperature observations and predictions in polygon centers (a) and rims (b). The simulation was performed with snow redistribution on and two-dimensional subsurface physics, between September 2012 and September 2013. ELM-3D accurately

Modeling the role of vegetation-induced preferential snow accumulation in open talik development and hillslope groundwater flow in a transitional permafrost landscape

The role of distributed snow on permafrost distribution along the hillslope at Teller field site

Schematic representation of the distributed snow depth where tall shrubs trap more snow than surrounding tundra affecting permafrost distribution and form new pathways for groundwater flow.

NGEE Arctic

Next-Generation Ecosystem Experiments

Progress & Accomplishments

Iron and Iron-Bound Phosphate Accumulate in Soils of Polygonal Tundra

Fig.1_20Q2.png

ORNL’s Misha Krassovski Supports International MOSAiC Expedition

Misha Krassovski

NGEE Arctic Contributes to NOAA’s 2019 Arctic Report Card

2019 NOAA Arctic Report Card

NGEE Arctic Continues to Have a Strong Presence at the American Geophysical Union (AGU) Meetings

2019 AGU

NGEE Arctic Returns to San Francisco for its Ninth All-Hands Meeting

Awards

Investigations of topographic control on thermokarst development and the ground thermal regime in ice wedge polygons using the Advanced Terrestrial Simulator

Snapshot of simulated snowpack surface (cyan line) and ground temperature in a low centered polygon on December 24, 2014, demonstrating that rims function as preferential outlets of subsurface heat in winter, becoming the coldest zone of the polygon.

NGEE Arctic scientists attend NASA ABoVE annual meeting

NASA ABoVE group photo including NGEE Arctic scientists, Shawn Serbin (top left) and Eugenie Euskirchen (bottom left).

Characterization of permafrost landscapes using an unmanned aerial system: LiDAR mapping the NGEE Arctic Teller field site

Examples of the collected data (e.g. LiDAR and aerial imagery) and products (Digital Elevation model) using UAS at NGEE Teller research site.

Impacts of microtopography on hydrologic and thermal states in an Arctic ecosystem: A case study using ELM-3D v1.0

Comparison of soil temperature observations and predictions in polygon centers (a) and rims (b). The simulation was performed with snow redistribution on and two-dimensional subsurface physics, between September 2012 and September 2013. ELM-3D accurately

Modeling the role of vegetation-induced preferential snow accumulation in open talik development and hillslope groundwater flow in a transitional permafrost landscape

Schematic representation of the distributed snow depth where tall shrubs trap more snow than surrounding tundra affecting permafrost distribution and form new pathways for groundwater flow.