Arctic Gross Primary Production Estimates from MODIS and Flux Towers

Daily gridded estimates of ecosystem Gross Primary Production (GPP) are provided at a 1 km² resolution across Alaska and Canada from 2000-01-01 to 2018-01-01. The dataset was produced by ORNL_CLOUD using a light-curve model fitted to Ameriflux tower data and upscaled with MODIS MAIAC satellite reflectance. This framework supports large-scale analysis of phenology and ecosystem sensitivity to climate change.

Use Cases

• Analyzing spatial and temporal trends in carbon uptake (GPP) across the ABoVE domain.
• Validating or calibrating terrestrial biosphere models using the derived light-curve parameters (aPAR, GPPmax, PPFDmax).
• Investigating ecosystem phenology and its response to climate drivers using the 18-year daily time series.
• Mapping regional photosynthetic capacity and limitations from the upscaled satellite reflectance data.

Strengths

• Provides an 18-year daily time series (2000-2018) for long-term trend analysis.
• Uses a validated methodology combining ground-based Ameriflux tower data with MODIS MAIAC satellite data.
• Offers high spatial resolution (1 km²) for detailed regional studies across Alaska and Canada.

Limitations

• Specific column names and the total row/grid cell count are not provided by any source.
• Conflicting last updated dates exist between platforms (2026-03 13 vs. 2018-01-01).

Provenance

Source

ORNL_CLOUD

Collection Method

Derived from a light-curve model fitted to Ameriflux flux tower data and upscaled using MODIS MAIAC daily reflectance.

Time Range

2000-01-01 to 2018-01-01

Freshness

2026-03-13 17:37:07.343766

Geography

Alaska and Canada (extended ABoVE domain)