Herbaceous Biomass and Productivity Maps for Mississippi River Delta

Spring and fall 2021 data provides high-resolution (~5 m) gridded maps of aboveground biomass (AGB), necromass (AGN), and net primary productivity (ANPP) for herbaceous vegetation in Louisiana's Atchafalaya and Terrebonne basins. The dataset was produced by ORNL_CLOUD using NASA AVIRIS-NG airborne spectrometer imagery and machine learning models trained on coincident field samples. This Version 3 release updates previous versions and is available in cloud-optimized GeoTIFF format.

Use Cases

• Modeling carbon sequestration potential in coastal herbaceous wetlands using AGB and ANPP layers.
• Assessing seasonal biomass dynamics (spring vs. fall) in deltaic floodplains.
• Calibrating or validating satellite-derived biomass products with high-resolution (~5 m) reference data.
• Studying the relationship between vegetation type and biomass/necromass distribution.
• Analyzing spatial patterns of primary productivity (ANPP) derived from AGB and AGN estimates.

Strengths

• High spatial resolution of approximately 5 meters, enabling detailed landscape analysis.
• Products derived from NASA AVIRIS-NG hyperspectral data combined with field-sampled AGB and AGN for machine learning model training.
• Covers two distinct seasons (spring and fall 2021) for the same geographic area, allowing temporal comparison.
• Cross-platform presence on NASA Earthdata and Data.gov signals recognized importance and curation.

Limitations

• Conflicting last updated dates: one source lists 2026-03-13, another lists 2021-08-25; the versioning note suggests 2026 is more likely for V3.
• Specific license terms under 'other-license-specified' are not detailed in the provided metadata.
• Column names and precise row/size counts are not provided, limiting understanding of the internal GeoTIFF data structure.

Provenance

Source

ORNL_CLOUD, utilizing NASA's Airborne Visible Infrared Imaging Spectrometer - Next Generation (AVIRIS-NG).

Collection Method

Machine learning regression models applied to BRDF-adjusted surface reflectance, trained on local field samples of AGB and AGN collected in Spring and Fall 2021.

Time Range

2021 (Spring and Fall seasons)

Freshness

2026-03-13 03:17:19.675032

Geography

Atchafalaya and Terrebonne basins of the Mississippi River Delta, coastal Louisiana, USA.