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NACP Site: Tower Meteorology, Flux Observations with Uncertainty, and Ancillary Data

Data Set Overview

Data setNACP Site: Tower Meteorology, Flux Observations with Uncertainty, and Ancillary Data
DOI10.3334/ORNLDAAC/1178
Release date2013-08-09
ProjectNorth American Carbon Program (NACP)
Time Period1991-01-01 to 2007-12-31

Description

This data set contains meteorological, carbon cycle flux, phenology, and ancillary data measured at 47 eddy covariance flux tower sites across North America. The data were used by North American Carbon Program (NACP) Site-Level Synthesis as model driver data and for assessing how well 24 Terrestrial Biosphere Models simulated carbon processes across vegetation types and environmental conditions. *The meteorology data include eight variables: air temperature (K), specific humidity (kg/kg), wind speed (m/s), precipitation (kg/m2/s), surface pressure (Pa), surface incident shortwave radiation (W/m2), surface incident longwave radiation (W/m2), and CO2 concentration (ppm). Gap-filled data were used by modeling teams as input model driver data. *Measured fluxes of net ecosystem exchange (NEE) and derived gross primary productivity (GPP) and respiration (R) and respective calculated uncertainty estimates are provided for each tower site at the native time resolution of the observations (30 or 60-minute) as well as the diurnal, seasonal, and annual time scales. The data were gap-filled following a standard protocol. Components of uncertainty include uncertainties resulting from turbulence, gap-filling, flux partitioning, and u* threshold determination. Flux observations and uncertainty data were used to assess how well models simulated carbon processes. *Remotely sensed NDVI, LAI, and fPAR phenology data were derived from the GIMMS version g NDVI data set for each flux tower site. Phenology data were used by some modeling teams as input model driver data. *Ancillary data and information describe tower location and physical characteristics, disturbance history, and biological and ecological attributes of the vegetation, litter, and soil. These ancillary data were used by modeling teams as input model driver data. The data files are in both ASCII text and NetCDF formats (ALMA standard). The compilation of these data was facilitated by the NACP Modeling and Synthesis Thematic Data Center (MAST-DC).

Documentation

Data set reference document

Citation

Barr, A.G., D.M. Ricciuto, K. Schaefer, A. Richardson, D. Agarwal, P.E. Thornton, K.J. Davis, R.B. Cook, D.Y. Hollinger, C. van Ingen, B. Amiro, A.E. Andrews, M.A. Arain, D. Baldocchi, T.A. Black, P. Bolstad, P. Curtis, A. Desai, D. Dragoni, L. Flanagan, L. Gu, G. Katul, B.E. Law, P.M. Lafleur, H. Margolis, R. Matamala, T. Meyers, J.H. McCaughey, R. Monson, J.W. Munger, W. Oechel, R. Oren, N.T. Roulet, M. Torn, and S.B. Verma. 2013. NACP Site: Tower Meteorology, Flux Observations with Uncertainty, and Ancillary Data. ORNL DAAC, Oak Ridge, Tennessee, USA. http://dx.doi.org/10.3334/ORNLDAAC/1178
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Project

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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  • NACP_Site_Tower_Met_and_Flux.pdf
  • Site_information_basic.csv
  • Site_location_summary.csv
  • NAPC_sites_ungrouped_with-label.png
  • phenology_readme.txt
  • site_synthesis_protocol_v7.pdf
  • Soil_texture_summary.csv
  • NACP_uncertainty_analysis.pdf
  • site_information_extended.pdf
  • site_synthesis_documentation.pdf
  • Richardson_gap_filling_2009.pdf

Data Files

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Data File (Granule)File SizeDatesLatitudeLongitude
CA-TP1_observation.zip 4.4 MB 2003-01-01 - 2007-12-31 42.66N80.56W
US-Ne3_observation.zip 4.4 MB 2001-01-01 - 2006-12-31 41.18N96.44W
US-Ne1_observation.zip 4.5 MB 2001-01-01 - 2006-12-31 41.17N96.48W
US-Ton_observation.zip 11.7 MB 2001-01-01 - 2007-12-31 38.43N120.97W
CA-Oas_observation.zip 19.1 MB 1997-01-01 - 2006-12-31 53.63N106.20W
US-MOz_observation.zip 5.4 MB 2004-01-01 - 2007-12-31 38.74N92.20W
CA-SJ3_observation.zip 4.1 MB 2004-01-01 - 2005-12-31 53.88N104.64W
US-IB1_observation.zip 3.2 MB 2005-01-01 - 2007-12-31 41.86N88.22W
CA-TP2_observation.zip 4.4 MB 2003-01-01 - 2007-12-31 42.77N80.46W
CA-SJ1_observation.zip 7.6 MB 2002-01-01 - 2005-12-31 53.91N104.66W
CA-Man_observation.zip 10.8 MB 1994-01-01 - 2006-12-31 55.88N98.48W
CA-Qfo_observation.zip 5.5 MB 2004-01-01 - 2006-12-31 49.69N74.34W
US-Dk2_observation.zip 2.8 MB 2003-01-01 - 2005-12-31 35.97N79.10W
CA-Ca3_observation.zip 9.7 MB 2002-01-01 - 2006-12-31 49.53N124.90W
CA-SJ2_observation.zip 7.3 MB 2003-01-01 - 2006-12-31 53.94N104.65W
US-Ne2_observation.zip 3.9 MB 2001-01-01 - 2006-12-31 41.16N96.47W
US-PFa_observation.zip 8.6 MB 1995-01-01 - 2005-12-31 45.95N90.27W
CA-TP3_observation.zip 4.4 MB 2003-01-01 - 2007-12-31 42.71N80.35W
CA-TP4_observation.zip 10.3 MB 2002-01-01 - 2007-12-31 42.71N80.36W
US-Me2_observation.zip 9.0 MB 2002-01-01 - 2007-12-31 44.45N121.56W
CA-Ojp_observation.zip 13.5 MB 2000-01-01 - 2006-12-31 53.92N104.69W
US-Me5_observation.zip 6.3 MB 1999-01-01 - 2002-12-31 44.44N121.57W
US-NR1_observation.zip 17.6 MB 1998-01-01 - 2007-12-31 40.03N105.55W
US-Me3_observation.zip 3.9 MB 2004-01-01 - 2005-12-31 44.32N121.61W
US-MMS_observation.zip 7.7 MB 1999-01-01 - 2006-12-31 39.32N86.41W
CA-Ca1_observation.zip 17.3 MB 1998-01-01 - 2006-12-31 49.87N125.33W
CA-Obs_observation.zip 13.4 MB 2000-01-01 - 2006-12-31 53.99N105.12W
US-Syv_observation.zip 10.7 MB 2001-01-01 - 2006-12-31 46.24N89.35W
US-ARM_observation.zip 13.6 MB 2000-01-01 - 2007-12-31 36.60N97.49W
US-Atq_observation.zip 6.5 MB 1999-01-01 - 2006-12-31 70.47N157.41W
CA-Gro_observation.zip 5.6 MB 2004-01-01 - 2006-12-31 48.22N82.16W
US-UMB_observation.zip 8.1 MB 1998-01-01 - 2006-12-31 45.56N84.71W
US-SO2_observation.zip 15.7 MB 1998-01-01 - 2006-12-31 33.37N116.62W
US-IB2_observation.zip 4.7 MB 2004-01-01 - 2007-12-31 41.84N88.24W
US-Var_observation.zip 13.4 MB 2001-01-01 - 2007-12-31 38.41N120.95W
US-WCr_observation.zip 14.9 MB 1998-01-01 - 2006-12-31 45.81N90.08W
US-Brw_observation.zip 7.8 MB 1998-01-01 - 2006-12-31 71.32N156.63W
US-Me4_observation.zip 4.6 MB 1996-01-01 - 2000-12-31 44.50N121.62W
CA-Mer_observation.zip 14.1 MB 1999-01-01 - 2006-12-31 45.41N75.52W
US-Dk3_observation.zip 14.4 MB 1998-01-01 - 2005-12-31 35.98N79.09W
US-Shd_observation.zip 4.9 MB 1997-01-01 - 2000-12-31 36.93N96.68W
US-Ho1_observation.zip 18.3 MB 1996-01-01 - 2004-12-31 45.20N68.74W
CA-WP1_observation.zip 7.3 MB 2003-01-01 - 2007-12-31 54.95N112.47W
CA-Let_observation.zip 19.7 MB 1997-01-01 - 2006-12-31 49.71N112.94W
US-Los_observation.zip 12.1 MB 2000-01-01 - 2006-12-31 46.08N89.98W
US-Ha1_observation.zip 14.1 MB 1991-01-01 - 2006-12-31 42.54N72.17W
CA-Ca2_observation.zip 11.4 MB 2001-01-01 - 2006-12-31 49.87N125.29W

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Files related to this data set have been downloaded on 150 occasions since 2013-08-21, totaling 4672 files.