Daily Gross Primary Productivity for CONUS from TROPOMI SIF, 2018-2021

Gross primary production (GPP) estimates for the conterminous United States derived from satellite-based solar-induced chlorophyll fluorescence (SIF). The dataset provides daily, spatially explicit GPP values and uncertainties at 500-meter resolution from February 15,我们发现2018, to October 15, 2021. NASA produced this data by applying a linear model calibrated with measurements from 102 AmeriFlux ground sites to SIF observations from the TROPOMI instrument on the Sentinel-5P satellite.

Use Cases

• Modeling regional and global carbon budgets using daily GPP estimates (g m-2 d-1).
• Analyzing ecosystem responses to climate extremes by tracking spatiotemporal patterns in SIF measurements (mW m-2 sr-1 nm-1).
• Validating and improving carbon cycle models with direct, satellite-derived photosynthesis data.
• Monitoring vegetation productivity and photosynthetic activity across the CONUS at a 500-m spatial resolution.
• Assessing uncertainty in GPP estimates using the provided uncertainty layer.

Strengths

• Data is derived from a direct proxy for photosynthesis (SIF) using a model calibrated with 102 AmeriFlux sites.
• Provides high spatiotemporal resolution with daily estimates at a 500-meter grid over the CONUS.
• Covers a multi-year time range from 2018 to 2021, enabling analysis of seasonal and interannual trends.
• Includes a quantitative uncertainty estimate for each GPP value, supporting rigorous analysis.

Limitations

• Spatial coverage is limited to the conterminous United States (CONUS), not global.
• Temporal coverage ends in October 2021, and update dates conflict between sources (2026 vs. 2021).
• Specific row counts, file sizes, and detailed column names are not provided in the source metadata.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

GPP estimated from TROPOMI SIF measurements using a linear model with scaling factors from 102 AmeriFlux sites.

Time Range

2018-02-15 to 2021-10-15

Freshness

2026-03-13 04:11:27.264946

Geography

Conterminous United States (CONUS)