ABoVE: Lake and Pond Extents in Alaskan Boreal and Tundra Subregions, 2019-2021

Description

This dataset provides polygon spatial files of lake and pond extents for three sub-regions of Interior Alaska's boreal forest, and one tundra region located in Alaska's Yukon-Kuskokwim Delta. Files provide lake and pond extents of standing water without wetland vegetation or other obstructions with a minimum area of 0.01 ha. Water extents were derived from Planet Labs PlanetScope imagery with resolution of 3.125 m. A deep learning model (U-Net) was applied to PlanetScope orthotile imagery from Planet Labs' Dove-R and Super Dove satellites. The U-Net model used the red, green, blue, and near-infrared bands along with a slope raster derived from a 30-m digital elevation model (DEM) as inputs. The U-Net detected water bodies in all available cloud-free images from the snow-free period (May-September) of 2019-2021. Water body data are provided as 3-year composites (2019-2021) for all four regions and monthly climatological composites (May-September) over 2019-2021 for the three boreal forest regions. The composite water files indicate the presence of open, standing water in >40% of valid PlanetScope observations for a given composite time-slice. Files are provided in shapefile format.

Resources

Name Format Description Link
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.3334%2FORNLDAAC%2F2134
21 This link allows direct data access via Earthdata login https://daac.ornl.gov/above/Alaska_Lake_Pond_Maps/
21 ORNL DAAC Data Set Documentation https://daac.ornl.gov/ABOVE/guides/Alaska_Lake_Pond_Maps.html
21 ABoVE project site https://above.nasa.gov
21 Data set Landing Page DOI URL https://doi.org/10.3334/ORNLDAAC/2134
33 ABoVE: Lake and Pond Extents in Alaskan Boreal and Tundra Subregions, 2019-2021: Alaska_Lake_Pond_Maps.pdf https://data.ornldaac.earthdata.nasa.gov/public/above/Alaska_Lake_Pond_Maps/comp/Alaska_Lake_Pond_Maps.pdf
34 Four subregions of Alaska (left) with example of lakes and ponds derived from PlanetScope imagery (right). Lake and pond extents include monthly climatological composites (May - September) and 3-year composites for 2019-2021. Seasonal dynamics of expansion and contraction for these bodies of water are documented. The inset for the Fairbanks (FB) region shows a close-up of the water extents overlain on sub-meter Esri base map imagery, illustrating the 3-m resolution of the PlanetScope imagery. The Yukon Flats (YF) inset shows variability in surface area of large lakes, which is common in this region. The Delta Junction (DJ) inset shows seasonal changes in the area of small ponds. The Yukon-Kuskokwim Delta (YKD) inset shows the spatial variability of water body areas in this region and is an example of a 3-year composite. https://daac.ornl.gov/ABOVE/guides/Alaska_Lake_Pond_Maps_Fig1.png

Tags

  • ecosystems
  • biosphere
  • surface-water
  • terrestrial-hydrosphere
  • earth-science

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