Time-Integrated Collection of Co 2 for 14 C Analysis From Soils
Bibliographic Data
| ID | 9242118 |
|---|---|
| Authors | Shawn Pedron (0000-0001-7999-6119), X Xu (0000-0002-1484-6635), J C Walker, J C Ferguson, R G Jespersen, J M Welker (0000-0002-3865-4822), E S Klein, C I Czimczik (0000-0002-8251-6603) |
| Year | 2021 |
| Volume | 63 |
| Issue | 4 |
| Pages | 1303-1319 |
| Publication date | 2021-08-01 |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Radiocarbon (JOURNAL) |
| Journal identifiers | ISSN: 0033-8222 • E-ISSN: 1945-5755 |
| Publisher | Cambridge University Press (CUP) (PUBLISHER) |
| DOI | 10.1017/rdc.2021.42 |
| OpenAlex | W3177005349 |
| Language | EN |
| Citations received | 1 |
| References cited | 57 |
We developed a passive sampler for time-integrated collection and radiocarbon ( 14 C) analysis of soil respiration, a major flux in the global C cycle. It consists of a permanent access well that controls the CO 2 uptake rate and an exchangeable molecular sieve CO 2 trap. We tested how access well dimensions and environmental conditions affect collected CO 2 , and optimized cleaning procedures to minimize 14 CO 2 memory. We also deployed two generations of the sampler in Arctic tundra for up to two years, collecting CO 2 over periods of 3 days–2 months, while monitoring soil temperature, volumetric water content, and CO 2 concentration. The sampler collects CO 2 at a rate proportional to the length of a silicone tubing inlet (7–26 μg CO 2 -C day -1 ·m Si -1 ). With constant sampler dimensions in the field, CO 2 recovery is best explained by soil temperature. We retrieved 0.1–5.3 mg C from the 1st and 0.6–13 mg C from the 2nd generation samplers, equivalent to uptake rates of 2–215 ( n= 17) and 10–247 μg CO 2 -C day -1 ( n= 20), respectively. The method blank is 8 ± 6 μg C (mean ± sd, n= 8), with a radiocarbon content (fraction modern) ranging from 0.5875–0.6013 ( n= 2). The sampler enables more continuous investigations of soil C emission sources and is suitable for Arctic environments
Archaeology · Arctic · Carbon cycle · Carbon dioxide · Ecosystem · Geography · Radiocarbon dating · Soil water · Tundra · Atmospheric and Environmental Gas Dynamics · Chemistry · Climate change and permafrost · CO2 Sequestration and Geologic Interactions · Environmental Science · Ecology · Environmental Chemistry · Geology · Soil Science
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| Citations per year | 0.5 |
|---|---|
| Citation span | 2024 - 2024 (1) |
| Highly cited | No |