Aboveground Biomass Estimates for Salt Marsh for the Contiguous United States, 2020

This dataset provides estimates of aboveground biomass (AGB) and salt marsh extent in the contiguous United States for 2020 and includes all coastal watersheds across the contiguous United States at 10-m resolution. Estimates were generated by XGBoost machine learning regression. Salt marsh extent was classified using an ensemble of XGBoost, random forests, and support vector machines, trained with salt marsh location identified with the National Wetland Inventory (NWI). The data are organized by Hydrologic Unit Code (HUC) 6-digit basin. Within each HUC, the spatial extent of salt marsh and its uncertainty were estimated by machine learning and input data from NWI maps, the National Elevation Dataset, along with Sentinel-1 and Sentinel-2 imagery. Estimates were compared to in situ biomass data from salt marshes in Georgia and Massachusetts. The data are provided in cloud-optimized GeoTIFF format.

Data and Resources

Additional Info

Field Value
Maintainer Earthdata Forum
Last Updated October 20, 2026, 10:23 (UTC)
Created April 1, 2025, 14:09 (UTC)
Identifier 10.3334/ORNLDAAC/2348
Modified 2026-10-15T20:12:06Z
Theme {"Earth Science"}
accessLevel public
bureauCode {026:00}
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
harvest_object_id 0d2190a6-e3c0-4e39-ac04-a201854f87dc
harvest_source_id b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title Science Discovery Engine
license https://www.usa.gov/government-works
programCode {026:000}
publisher ORNL_DAAC
resource-type Dataset
source_datajson_identifier true
source_hash 34ae7d1b914790c033ae5ff34dd204b2b137201c0e05c0d4c7a47df48e3418ac
source_schema_version 1.1
spatial ["CARTESIAN", [{"WestBoundingCoordinate": -124.74, "NorthBoundingCoordinate": 49.0042, "EastBoundingCoordinate": -66.935, "SouthBoundingCoordinate": 24.5181}]]
temporal 2020-01-01/2020-12-31