NASMo-TiAM 250m 16-day North America Surface Soil Moisture Dataset

This NASMo-TiAM (North America Soil Moisture Dataset Derived from Time-Specific Adaptable Machine Learning Models) dataset holds gridded estimates of surface soil moisture (0-5 cm depth) at a spatial resolution of 250 meters over 16-day intervals from mid-2002 to December 2020 for North America. The model employed Random Forests to downscale coarse-resolution soil moisture estimates (0.25 deg) from the European Space Agency Climate Change Initiative (ESA CCI) based on their correlation with a set of static (terrain parameters, bulk density) and dynamic covariates (Normalized Difference Vegetation Index, land surface temperature). NASMo-TiAM 250m predictions were evaluated through cross-validation with ESA CCI reference data and independent ground-truth validation using North American Soil Moisture Database (NASMD) records. The data are provided in cloud optimized GeoTIFF format.

Data and Resources

Additional Info

Field Value
Maintainer Earthdata Forum
Last Updated November 5, 2026, 08:38 (UTC)
Created April 1, 2025, 18:01 (UTC)
Identifier 10.3334/ORNLDAAC/2326
Modified 2026-11-02T22:15:59Z
Theme {"Earth Science"}
accessLevel public
bureauCode {026:00}
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
harvest_object_id 779a6367-0ca4-4152-8872-9760059f960f
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 e042ca796df94d37b143ece7105908d1bb8b5fa102e2f322bdf953d35488d809
source_schema_version 1.1
spatial ["CARTESIAN", [{"WestBoundingCoordinate": -180.0, "NorthBoundingCoordinate": 82.7193, "EastBoundingCoordinate": -39.9955, "SouthBoundingCoordinate": 14.5312}]]
temporal 2002-06-26/2020-12-31