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Carbon Combustion Following Saskatchewan Wildfires

Map of Saskatchewan and total carbon combustion.

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).

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

Landscape-Scale Estimates of Methane Ebullition from Lakes

Map of Alaska study regions.

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.

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

Soil Pit Properties from the Arctic-Boreal Vulnerability Experiment

Site sampling plan for active layer soil characterization.

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).

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

High Res/Cloud-Free Snow Cover Extent and Depth

Map of Alaska showing snow depth.

Downscaled MERRA-2 snow depth (in meters) data. Images show snow depth for two time periods: spring snow melt for 23-30 April, 2007 (left) and during early snow accumulation for 30 September-7 October, 2007 (right).

One kilometer resolution, cloud-free snow cover extent and snow depth data are available for Alaska from 2001 to 2017.

Spatial Patterns in Methane Fluxes of Arctic Vegetation

Chamber located in a grass field.

The custom-built chamber for measuring in situ trace gas fluxes from soil/vegetation and water surfaces. The chamber (~ 0.5 m3) provides adequate height to enclose emergent grasses and reeds.

A new dataset provides diffusive methane (CH4) fluxes of emergent and upland vegetation at two thermokarst lakes in Alaska.

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