NACP VPRM NEE Parameters Optimized to North American Flux Tower Sites, 2000-2006

This data set provides Vegetation Photosynthesis Respiration Model (VPRM) net ecosystem exchange (NEE) parameter values optimized to 65 flux tower sites across North America. The parameters include the basal rate of ecosystem respiration (beta), the slope of respiration with respect to temperature (alpha), light-use efficiency (LUE) (lambda), and LUE curve half-saturation (PAR_0). Observed eddy covariance data from the 65 tower sites, locally observed temperature and photosynthetically active radiation (PAR) along with satellite-derived phenology and moisture were used as input data to optimize the VPRM parameters for the 65 sites. The data are provided by individual site, plant functional types (PFTs), and all sites together, and as monthly, annual, and all available data. The data are for the conterminous USA, Alaska, and Canada for the period 2000 to 2006.

Data and Resources

Additional Info

Field Value
Maintainer Earthdata Forum
Last Updated June 8, 2026, 16:35 (UTC)
Created April 1, 2025, 17:55 (UTC)
accessLevel public
bureauCode {026:00}
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
harvest_object_id d3dd581d-1964-4a9b-b03a-fc24016567a5
harvest_source_id b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title Science Discovery Engine
identifier 10.3334/ORNLDAAC/1349
license https://www.usa.gov/government-works
modified 2026-06-03T16:52:47Z
programCode {026:000}
publisher ORNL_DAAC
resource-type Dataset
source_datajson_identifier true
source_hash 99de3f8bdf98537549827ab5f4a1ad67a57b566f49425836e5f260ea350b3325
source_schema_version 1.1
spatial ["CARTESIAN", [{"WestBoundingCoordinate": -156.63, "NorthBoundingCoordinate": 71.32, "EastBoundingCoordinate": -68.74, "SouthBoundingCoordinate": 28.46}]]
temporal 2000-01-01/2007-12-31
theme {"Earth Science"}