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BigFoot Field Data for North American Sites, 1999-2003

Data Set Overview

Data setBigFoot Field Data for North American Sites, 1999-2003
DOI10.3334/ORNLDAAC/868
Release date2008-06-27
ProjectBigFoot
Time Period1999-01-01 to 2003-12-31

Description

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 ( http://landval.gsfc.nasa.gov/MODIS/index.php ), 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.

Documentation

Data set reference document

Citation

Gower, S. T. and A. A. Kirschbaum. 2008. BigFoot Field Data for North American Sites, 1999-2003. Data set. Available on-line [http://www.daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A. doi:10.3334/ORNLDAAC/868
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Project

BigFoot: The objective of BigFoot is to provide ground validation of MODLand (MODIS Land Discipline Group) land cover, leaf area index (LAI), fAPAR, and net primary production (NPP) products. The name BigFoot was selected to describe the multiple scales, or footprints, of ground validation that the project will undertake. The current BigFoot study plan covers measurement, mapping, and modeling activities at four sites, each equipped with a meteorological flux tower that makes continuous measurements of energy, water, and carbon fluxes for a roughly 1-km2 footprint.

Project data set list for BigFoot.

Companion Files

Display and save these companion files.

  • BigFoot_Field_Manual_1999.pdf
  • AGRO_README.pdf
  • TUND_README.pdf
  • BigFoot_Field_Data.pdf
  • SEVI_README.pdf
  • HARV_README.pdf
  • tund_plot_pictures.zip
  • KONZ_README.pdf
  • sevi_plot_pictures.zip
  • NOBS_README.pdf

Data Files

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Data File (Granule)File SizeDates
agro.zip 126.0 KB 1999-01-01 - 2003-12-31
BigFoot_site_locations.csv 1.4 KB 1999-01-01 - 2003-12-31
harv.zip 161.0 KB 1999-01-01 - 2003-12-31
konz.zip 194.7 KB 1999-01-01 - 2003-12-31
nobs.zip 164.2 KB 1999-01-01 - 2003-12-31
sevi.zip 56.8 KB 1999-01-01 - 2003-12-31
tund.zip 27.1 KB 1999-01-01 - 2003-12-31

Publications

Publications using this data set