LiDAR Derived Forest Aboveground Biomass Maps, Northwestern USA, 2002-2016

Description

This dataset provides maps of aboveground forest biomass (AGB) of living trees and standing dead trees in Mg/ha across portions of Northwestern United States, including Washington, Oregon, Idaho, and Montana, at a spatial resolution of 30 m. Forest inventory data were compiled from 29 stakeholders that had overlapping lidar imagery. The collection totaled 3805 field plots with lidar imagery for 176 collections acquired between 2002 and 2016. Plot-level AGB estimates were calculated from tree measurements using the default allometric equations found in the Fire Fuels Extension (FFE) of the Forest Vegetation Simulator (FVS). The random forest algorithm was used to model AGB from lidar height and density metrics that were generated from the lidar returns within fixed-radius field plot footprints, gridded climate metrics obtained from the Climate-FVS Ready Data Server, and topographic estimates extracted from Shuttle Radar Topography Mission (SRTM) 1 Arc-Second Global elevation rasters. AGB was then mapped from the same lidar metrics gridded across the extent of the lidar collections at 30-m resolution. The standard deviation of estimated AGB of the terminal nodes from the random forest predictions was also mapped to show pixel-level model uncertainty. Note that the AGB estimates are, for the most part, a single snapshot in time and that the forest conditions are not necessarily representative of the larger study area.

Resources

Name Format Description Link
21 This link allows direct data access via Earthdata login https://daac.ornl.gov/cms/Forest_AGB_NW_USA/
21 ORNL DAAC Data Set Documentation https://daac.ornl.gov/CMS/guides/Forest_AGB_NW_USA.html
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.3334%2FORNLDAAC%2F1766
21 Data set Landing Page DOI URL https://doi.org/10.3334/ORNLDAAC/1766
33 LiDAR-Derived Forest Aboveground Biomass Maps, Northwestern USA: Forest_AGB_NW_USA.pdf https://data.ornldaac.earthdata.nasa.gov/public/cms/Forest_AGB_NW_USA/comp/Forest_AGB_NW_USA.pdf
34 The locations of the 176 lidar collection areas (light green polygons) acquired between 2002 and 2016. Source: LidarUnits.zip https://daac.ornl.gov/CMS/guides/Forest_AGB_NW_USA_Fig1.png
25 LiDAR-Derived Forest Aboveground Biomass Maps, Northwestern USA: LidarUnits.kmz https://data.ornldaac.earthdata.nasa.gov/public/cms/Forest_AGB_NW_USA/comp/LidarUnits.kmz

Tags

  • ecosystems
  • biosphere
  • vegetation
  • earth-science

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