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.
greenhouse, gasses, N2O, CO2, O2, CH4, soil gas, weathering front, deep soil
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 http://criticalzone.org/calhoun/data/dataset/4659/
Data Use Policy
1. Use our data freely. All CZO Data Products* except those labelled Private** are released to the public and may be freely copied, distributed, edited, remixed, and built upon under the condition that you give acknowledgement as described below. Non-CZO data products — like those produced by USGS or NOAA — have their own use policies, which should be followed.
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* CZO Data Products. Defined as data collected with any monetary or logistical support from a CZO. Logistical support includes the use of any CZO sensors, sampling infrastructure, equipment, vehicles, or labor from a supported investigator, student or staff person. CZO Data Products can acknowledge multiple additional sources of support.
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† Dataset Creators. Defined as the people who are responsible for designing, collecting, analyzing and providing quality assurance for a dataset. The creators of a dataset are analogous to the authors of a publication, and datasets should be cited in an analogous manner following the emerging international guidelines described at http://www.datacite.org/whycitedata.
Research area 1 (2016-2019). Soil Gas, Soil Moisture, Soil Temperature,...