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Surveying the Ecological Effects of Fire on Alaska's Yukon-Kuskokwim Delta

Map of Cover according to Plant Functional Types

Vegetation point-intercept (VPI) any-hit cover metric data were combined with Landsat imagery to develop fractional maps of any-hit cover for four aggregated plant functional types (PFTs); shrubs bryophytes, lichen, and herbs for the upland tundra area of the Y-K Delta, Alaska. VPI data were collected from plots in areas burned in 1971, 1985, 2005, and 2015.

Ecological field data and maps of vegetation cover spanning gradients of fire history in upland tundra are available from the Arctic-Boreal Vulnerability Experiment (ABoVE).

Boreal Forest Biomass and Soil Metrics at Burned Sites

Map of burned areas across portions of North America.

Field sites, ecoregions, and total area burned (millions of hectares; Mha) in each of the ecoregions in the study domain over time. Grey dotted line in the inset represents the simple linear regression, with red shading for the 95% confidence intervals, of burned area for all ecoregions combined. Analyses were completed using the field site groupings, located within the six ecoregions defined by the EPA Level II Ecoregions of North America.

Burned forest plot data is available from the Arctic-Boreal Vulnerability Experiment (ABoVE).

Active Layer Thickness across Alaska

Map of active layer thickness in Alaska.

Model-simulated 1 km mean active layer thickness (ALT) map from 2001 to 2015. Black dots are locations of circumpolar active layer monitoring (CALM) sites used for comparison of observed ALT to modeled ALT. CALM data are not provided. The areas with ALT greater than 300 cm depth are shown in dark gray.

MODIS and SMAP satellite data were used to derive estimates of active layer thickness and uncertainty.

Open Water Pixel Masks from ABoVE Flight Paths

AirSWOT Imagery

Example of color-infrared imagery shown alongside the corresponding semi-automated open water classification at Old Crow Flats, Alaska.

AirSWOT imagery from the 2017 Arctic-Boreal Vulnerability Experiment (ABoVE) was used to create water masks across parts of Canada and Alaska.

Boreal Forest Burned and Unburned Site Comparisons

Image of a burned field site.

A typical burned plot in the Saskatchewan, Canada, boreal forest study area.

Fire history and field measurements were used to estimate above- and belowground carbon values.