BigFoot Field Data for North American Sites, 1999-2003

Metadata Updated: November 12, 2020

The BigFoot project gathered field data for selected EOS Land Validation Sites in North America from 1999 to 2003. Data collected and derived for varying intervals at the BigFoot sites and archived with this data set include FPAR, nitrogen content, allometry equations, root biomass, LAI, tree biomass, soil respiration, NPP, landcover images, and vegetation inventories.Each site is representative of one or two distinct biomes, including the Arctic tundra; boreal evergreen needleleaf forest; temperate cropland, grassland, and deciduous broadleaf forest; desert grassland and shrubland. The project collected multi-year, in situ measurements of ecosystem structure and functional characteristics related to the terrestrial carbon cycle at the sites listed in Table 1. Companion files include documentation of measurement data, site and plot locations (Figure 2), and plot photographs for the SEVI and TUND sites (Figure 3).BigFoot Project Background: Reflectance data from MODIS, the Moderate Resolution Imaging Spectrometer onboard NASA's Earth Observing System (EOS) satellites Terra and Aqua ( ), was used to produce several science products including land cover, leaf area index (LAI), gross primary production (GPP), and net primary production (NPP). The overall goal of the BigFoot Project was to provide validation of these products. To do this, BigFoot combined ground measurements, additional high-resolution remote-sensing data, and ecosystem process models at six flux tower sites representing different biomes to evaluate the effects of the spatial and temporal patterns of ecosystem characteristics on MODIS products. BigFoot characterized up to a 7 x 7 km area (49 1-km MODIS pixels) surrounding the CO2 flux towers located at six of the nine BigFoot sites. The sampling design allowed the Project to examine scales and spatial patterns of these properties, the inter-annual variability and validity of MODIS products, and provided for a field-based ecological characterization of the flux tower footprint. BigFoot was funded by NASA's Terrestrial Ecology Program.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020

Metadata Source

Harvested from NASA Data.json

Graphic Preview

Example of .tif file provided for LAI (leaf area index) data.

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Publisher ORNL_DAAC
Unique Identifier Unknown
Identifier C179003097-ORNL_DAAC
Data First Published 2008-06-27
Language en-US
Data Last Modified 2019-04-15
Category BIGFOOT, geospatial
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Citation Gower, S.T., and A.A. Kirschbaum. 2008. BigFoot Field Data for North American Sites, 1999-2003. ORNL DAAC, Oak Ridge, Tennessee, USA.
Graphic Preview Description Example of .tif file provided for LAI (leaf area index) data.
Graphic Preview File
Homepage URL
Metadata Type geospatial
Program Code 026:001
Source Datajson Identifier True
Source Hash 4f9cf8e286b72929c41620e1c57c3337aba2fd15
Source Schema Version 1.1
Spatial -156.61 34.32 -72.25 71.27
Temporal 1999-01-01T00:00:00Z/2003-12-31T23:59:59Z

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