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Jessica Welch to Present ORNL DAAC Tools at ESA Workshop

Submitted by ORNL DAAC Staff on 2020-08-01
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Jessica Welch will demonstrate ORNL DAAC tools and service at the upcoming Ecological Society of America (ESA) virtual meeting.

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The ORNL DAAC invites Ecological Society of America meeting participants to learn about our resources at the NASA Data Made Easy Workshop.

Landscape-Scale Estimates of Methane Ebullition from Lakes

Submitted by ORNL DAAC Staff on 2020-07-29
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SAR-based lake ebullition maps. Panel a shows Alaska study regions with SAR footprints outlined in yellow. Subsequent panels show SAR-based CH4 ebullition maps for b) Barrow Peninsula, c) Atqasuk, d) Toolik, e) northern Seward Peninsula, and f) Fairbanks. Study lakes with field-based measurements are outlined (b,c) or boxed (d,e,f) in white. Orange boxes in panel f indicate anthropogenic study lakes.

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Synthetic Aperture Radar (SAR) was used to estimate methane ebullition flux for thousands of lakes in five regions across Alaska.

Carbon Combustion Following Saskatchewan Wildfires

Submitted by ORNL DAAC Staff on 2020-07-28
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Spatial estimates of total carbon combustion at 30 m resolution across the 2015 fire perimeters in Saskatchewan (a) and sampled fires (b, c, d). The spatial extents of sampled fires are shown as blue rectangles in (a).

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A new Arctic-Boreal Vulnerability Experiment (ABoVE) provides spatial estimates of carbon combustion and uncertainty on a 30 m grid.

Soil Pit Properties from the Arctic-Boreal Vulnerability Experiment

Submitted by ORNL DAAC Staff on 2020-07-20
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Site sampling plan used for characterizing active layer soils (left). Axes are in meters. At Imnavait Creek, active layer thickness (ALT) was measured on transects intersecting a central soil pit. Soil dielectric properties, in situ moisture and temperature profiles were measured, and soil samples were collected for analyses from the soil pit (right).

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Active layer thickness, soil dielectric profiles, and soil physical properties are key variables for understanding the Arctic permafrost layer.