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

Data Set Overview

Data setNACP VPRM NEE Parameters Optimized to North American Flux Tower Sites, 2000-2006
Release date2016-11-17
ProjectNorth American Carbon Program (NACP)
Time Period2000-01-01 to 2007-12-31


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 set reference document


Hilton, T.W., K.J. Davis, K. Keller, and N.M. Urban. 2016. NACP VPRM NEE Parameters Optimized to North American Flux Tower Sites, 2000-2006. ORNL DAAC, Oak Ridge, Tennessee, USA.
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North American Carbon Program (NACP): The North American Carbon Program (NACP) is a multidisciplinary research program designed to obtain scientific understanding of North America's carbon sources and sinks and of changes in carbon stocks needed to meet societal concerns and to provide tools for decision makers.

Project data set list for North American Carbon Program (NACP).

Companion Files

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  • VPRM_North_America_Parameters_Fig1.png
  • VPRM_North_America_Parameters.pdf

Data Files

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Data File (Granule)File SizeDates
VPRM_parameters_all_sites_all_data.csv 191 B 2000-01-01 - 2007-12-31
VPRM_parameters_all_sites_annual_data.csv 634 B 2000-01-01 - 2007-12-31
VPRM_parameters_all_sites_monthly_data.csv 5.5 KB 2000-01-01 - 2006-12-31
VPRM_parameters_individual_sites_all_data.csv 4.4 KB 2000-01-01 - 2004-12-31
VPRM_parameters_individual_sites_annual_data.csv 19.0 KB 2000-01-01 - 2006-12-31
VPRM_parameters_individual_sites_monthly_data.csv 222.4 KB 2000-01-01 - 2006-12-31
VPRM_parameters_pft_sites_all_data.csv 677 B 2000-01-01 - 2000-12-31
VPRM_parameters_pft_sites_annual_data.csv 3.9 KB 2000-01-01 - 2006-12-31
VPRM_parameters_pft_sites_monthly_data.csv 44.6 KB 2000-01-01 - 2006-12-31

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Files related to this data set have been downloaded on 2 occasions since 2017-03-16, totaling 24 files.