Dataset Listing

Research areas 1, 4, 7 - Soil Gas (2015-2017)

sampled at depths of 0.5, 1.5, 3, 5, and 8.5 meters

Variables:  Date, Site, Plot, Depth (m), Time, O2_pct, CO2_pct, GC_N2O_ppm, GC_CH4_ppm, GC_CO2_pct

Standard Variables:  Carbon dioxide|Depth, soil|Methane|Nitrous oxide|Oxygen

Date Range:  (2015-07-31 to 2017-11-22. samples collected and analyzed approximately every 3 weeks; ongoing)

Dataset Creators/Authors:  Brecheisen, Z. S.; Cook, Charles W.; Richter, Daniel deB.

Contact:  Zachary Brecheisen, Nicholas School of the Environment, Duke University, Box 90328 Durham NC 27708,

Field Area:   Calhoun CZO Research Area 1 | Calhoun CZO Research Area 4 | Calhoun CZO Research Area 7

Keywords & XML
  • Description

    Zachary Brecheisen, with help from Dan Richter, Will Cook, Alex Cherkinsky, Jay Austin, and others, have augered and installed soil gas wells at 4 depths at 15 locations in the Calhoun CZO. Most installation occurred in the summer of 2015 and completed in summer 2016. Gas sampling of existing wells commenced 7-31-15 and has proceeded approximately every 3 weeks since then. The gas wells target 3 different land forms: flat uplands, mid-slopes, and steeper slopes in 3 different land use comparisons. The land uses consist of 3 reference hardwood forests minimally degraded by human activity, 3 old-field secondary succession pine forests >60 years old, and 1 pseudo-replicated agricultural plot which has been, to the best of our knowledge, continually cultivated from the 1930s at the latest. The goal of this sampling is to identify anthropogenic biogeochemical signals in the deep soil profile of cultivated lands and to evaluate their persistence or lack thereof in old-field pine forests relative to reference hardwoods. Soil gas is analyzed in the field for O2 using an Apogee oxygen meter and CO2 with a Vaisala meter. Other (greenhouse) gasses are brought back to the lab, where they are analyzed on a Varian gas chromatograph with known concentration standards.
    Gasses analyzed/measured include O2, CO2, N2O, and CH4. O2 and CO2 are measured as percent concentrations. N2O and CH4 are measured in parts per million (ppm). Samples are collected from 4 depths in the soil profile: 0.5, 1.5, 3, & 5m.
  • Keywords

    greenhouse, gasses, N2O, CO2, O2, CH4, soil gas, weathering front, deep soil

    XML Metadata

    XML is in ISO-19115 geographic metadata format, compatible with ESRI Geoportal Server.

  • Citation for This Webpage

    Brecheisen, Z. S.; Cook, Charles W.; Richter, Daniel deB. (2017). "CZO Dataset: Research areas 1, 4, 7 - Soil Gas (2015-2017)." Retrieved 08 Dec 2019, from


Research areas 1, 4, 7 - soil gas concentrations

(xlsx)   Data Level 1,  [Private]

Tower site, Research area 1 - soil gas concentrations

(xlsx)   Data Level 1

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