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Abstract
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.
Date Range Comments: samples collected and analyzed approximately every 3 weeks; ongoing
Subject Keywords
Coverage
Spatial
Temporal
| Start Date: | |
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| End Date: |
Content
ReadMe.md
CCZO -- Soil Gas -- Research areas 1, 4, 7 -- (2015-2017)
OVERVIEW
Description/Abstract
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.
Creator/Author
Brecheisen, Z. S.|Cook, Charles W.|Richter, Daniel deB.
CZOs
Calhoun
Contact
Zachary Brecheisen, Nicholas School of the Environment, Duke University, Box 90328 Durham NC 27708, zbrecheisen@gmail.com
Subtitle
sampled at depths of 0.5, 1.5, 3, 5, and 8.5 meters
SUBJECTS
Disciplines
Biogeochemistry|Soil Science / Pedology
Topics
Soil Gas
Keywords
greenhouse|gasses|N2O|CO2|O2|CH4|soil gas|weathering front|deep soil
Variables
Date|Site|Plot|Depth (m)|Time|O2_pct|CO2_pct|GC_N2O_ppm|GC_CH4_ppm|GC_CO2_pct
Variables ODM2
Carbon dioxide|Depth, soil|Methane|Nitrous oxide|Oxygen
TEMPORAL
Date Start
2015-07-31
Date End
2017-11-22
Date Range Comments
samples collected and analyzed approximately every 3 weeks; ongoing
SPATIAL
Field Areas
Calhoun CZO Research Area 1|Calhoun CZO Research Area 4|Calhoun CZO Research Area 7
Location
Research areas 1, 4, 7
North latitude
34.61615
South latitude
34.53911
West longitude
-81.76541
East longitude
-81.67057
REFERENCE
CZO ID
4659
Related datasets
CCZO -- Soil Gas, Soil Moisture, Soil Temperature -- Research area 1 -- (2016-2019)
COMMENTS
Comments
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.
Additional Metadata
| Name | Value |
|---|---|
| czos | Calhoun |
| czo_id | 4659 |
| comments | 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 |
| subtitle | 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 |
| disciplines | Biogeochemistry, Soil Science / Pedology |
| related_datasets | 4658 |
| date_range_comments | samples collected and analyzed approximately every 3 weeks; ongoing |
| related_datasets_hs | https://www.hydroshare.org/resource/57a0afc2bb0e42b180478668a565720d/ |
How to Cite
This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
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