NACP Site Synthesis: Terrestrial Biosphere Model Output for 47 Flux Towers

Twenty-four terrestrial biosphere models provide standardized output for six key ecosystem variables at 47 eddy covariance flux tower sites across North America. The dataset was compiled for the North American Carbon Program Site-Level Synthesis to enable model intercomparison and assessment of carbon process simulations across diverse vegetation and environmental conditions. Output and gap-filled observations are available at half-hourly, daily, monthly, and annual temporal aggregations.

Use Cases

• Benchmarking terrestrial biosphere model performance against gap-filled flux tower observations.
• Analyzing spatial and temporal patterns of gross primary productivity and net ecosystem exchange across North American ecosystems.
• Assessing model uncertainty in simulating carbon, water, and energy fluxes (e.g., latent heat, sensible heat).
• Comparing simulated leaf area index and ecosystem respiration outputs from 24 different models.
• Conducting site-level synthesis studies for the North American Carbon Program.

Strengths

• Includes output from 24 distinct terrestrial biosphere models, enabling broad model intercomparison.
• Covers 47 eddy covariance flux tower sites, providing spatial breadth across North America.
• Contains gap-filled observations and total uncertainty estimates alongside model output.
• Data is available at multiple temporal resolutions (half-hourly to annual), supporting analyses at different scales.

Limitations

• Specific column names and the total row count are not provided in the available metadata.
• There is a conflict in the 'last updated' date between platforms (2007 vs. 2026), casting doubt on data freshness.
• The license is ambiguously listed as 'other-license-specified' without explicit terms.

Provenance

Source

National Aeronautics and Space Administration (NASA), compiled for the North American Carbon Program (NACP) Site-Level Synthesis.

Collection Method

Model outputs generated using standardized input data (gap-filled weather, land use history) and setup procedures for each flux tower site.

Time Range

null

Freshness

Last updated dates conflict: one source states 2007-12-31, another states 2026-04-10.

Geography

47 eddy covariance flux tower sites in North America.