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NACP MCI: Tower Atmospheric CO2 Concentrations, Upper Midwest Region, USA, 2007-2009


DatasetNACP MCI: Tower Atmospheric CO2 Concentrations, Upper Midwest Region, USA, 2007-2009
Release date2014-01-16
Time period2007-01-01 to 2009-12-31

Usage Metrics

CountEarliest DateLatest DateData Usage
Downloads552014-04-092017-11-20401 total files downloaded


This data set provides high precision and high accuracy atmospheric CO2 data from seven instrumented communication towers located in the U.S. Upper Midwest. The overall sampling period was from January 2007 through December 2009 although actual sampling dates vary within this time period for individual towers and sampling heights above ground level. The measurements were obtained in support of the North American Carbon Program (NACP) Mid-Continent Intensive (MCI) campaign. The sampling network included: the five Ring 2 towers (Centerville (Iowa), Galesville (Wisconsin), Kewanee (Illinois), Mead (Nebraska), and Round Lake (Minnesota)) deployed and operated by PSU; the Missouri Ozarks (Missouri) co-located AmeriFlux site (PSU/Oak Ridge National Laboratory (ORNL)); and the Rosemount (Minnesota) tall tower trace gas observatory (University of Minnesota, Rosemount Research and Outreach Center (RROC)). Hourly CO2 dry mole fractions (in ppm) were averaged from measurements made at different above-ground levels on the towers and are reported in Coordinated Universal Time (UTC). For the five Ring 2 sites, daily daytime average CO2 dry mole fractions were also calculated, from hourly values between 12:00-17:00 local standard time and reported in UTC. There are seven compressed (.zip) data files and one comma-separated (.csv) file with this data set. Data quality flags are provided in each file.

Dataset documentation


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Crosscite Citation Formatter
Miles, N.L., S.J. Richardson, K.J. Davis, A.E. Andrews, T.J. Griffis, V. Bandaru, and K.P. Hosman. 2013. NACP MCI: Tower Atmospheric CO2 Concentrations, Upper Midwest Region, USA, 2007-2009. ORNL DAAC, Oak Ridge, Tennessee, USA.

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Data Files

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Data File (Granule)File SizeDatesLatitudeLongitude 328.3KB 2007-05-01 to 2009-11-04 41.14N96.46W 339.9KB 2007-05-03 to 2009-11-04 43.53N95.41W 333.1KB 2007-06-30 to 2009-11-04 44.09N91.34W 308.6KB 2007-04-28 to 2009-11-04 40.79N92.88W 244.0KB 2007-01-01 to 2009-12-31 44.69N93.07W 97.7KB 2007-01-01 to 2009-03-06 38.74N92.20W
ring2_mci_sites.csv 1.4KB 2007-01-01 to 2009-12-31 44.69N to 38.74N89.97W to 96.46W 317.3KB 2007-04-27 to 2009-11-04 41.28N89.97W

Companion Files

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Dataset has 11 companion files.

  • Kewanee_RING2_readme.pdf
  • Rosemount_readme.pdf
  • Galesville_RING2_readme.pdf
  • Round_Lake_RING2_readme.pdf
  • NACP_MCI_US_County_Names.csv
  • Missouri_Ozarks_readme.pdf
  • Mead_RING2_readme.pdf
  • Centerville_RING2_readme.pdf
  • NACP_MCI_CO2_Measurements.pdf