Modeled Carbon Exchange for Continental USA with Soil Moisture Constraints

Hourly and monthly estimates of Net Ecosystem Exchange (NEE) of CO2 across the conterminous United States at a 50 km resolution from January 2012 to October 2014. The dataset was generated by the Ecosystem Demography Biosphere Model (ED2), uniquely constrained by AirMOSS-derived root zone soil moisture measurements. This model-data fusion approach aims to improve predictions of carbon fluxes by accounting for soil moisture impacts on ecosystem processes.

Use Cases

• Analyzing the spatiotemporal patterns of CO2 uptake and release across US ecosystems using the modeled NEE values.
• Investigating the sensitivity of carbon fluxes to soil moisture by leveraging the integrated AirMOSS soil moisture data.
• Validating or benchmarking other regional-scale carbon cycle models against these Level 4 estimates.
• Studying seasonal and interannual variability in net carbon exchange over a nearly three-year period.

Strengths

• Provides a unique fusion of ecosystem model (ED2) output with observational soil moisture data from the AirMOSS mission.
• Offers data at two temporal resolutions—hourly and monthly—over a 34-month period from 2012 to 2014.
• Covers the entire conterminous United States at a consistent 50 km spatial resolution.

Limitations

• Specific column names and the total row count are not provided by any source, limiting detailed structural understanding.
• Conflicting metadata exists: one platform lists a last update date of 2026-03-13, while another lists 2014-10 31, creating uncertainty about provenance.
• The license is ambiguously listed as 'other-license-specified' without explicit terms.

Provenance

Source

ORNL_CLOUD, using the Ecosystem Demography Biosphere Model (ED2) augmented with AirMOSS L2/3 soil moisture data.

Collection Method

Modeled estimates produced by the ED2 model, constrained and improved with observational root zone soil moisture data.

Time Range

January 2012 through October 2014

Freshness

2026 03 13 16:22:58.459474

Geography

Conterminous United States