Analysis of the background of the Jena 14C-AMS facility

Steinhof, Axel

doi:10.1016/j.nimb.2013.12.038

Cited by 3 publications

(2 citation statements)

References 17 publications

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“…Radiocarbon concentrations of SIC were measured by accelerator mass spectrometry at the Jena 14 C facilities (Steinhof, 2014). Because 14 C measurements are costly, we chose the cropland pair with the larger SIC loss (always irrigated plots where available) for comparison with 14 C SIC under natural vegetation.…”

Section: Methodsmentioning

confidence: 99%

Agricultural acceleration of soil carbonate weathering

Kim

Jobbágy

Richter

et al. 2020

Global Change Biology

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Soil carbonates (i.e., soil inorganic carbon or SIC) represent more than a quarter of the terrestrial carbon pool and are often considered to be relatively stable, with fluxes significant only on geologic timescales. However, given the importance of climatic water balance on SIC accumulation, we tested the hypothesis that increased soil water storage and transport resulting from cultivation may enhance dissolution of SIC, altering their local stock at decadal timescales. We compared SIC storage to 7.3 m depth in eight sites, each having paired plots of native vegetation and rain‐fed croplands, and half the sites having additional irrigated cropland plots. Rain‐fed and irrigated croplands had 328 and 730 Mg C/ha less SIC storage, respectively, compared to their native vegetation (grassland or woodland) pairs, and irrigated croplands had 402 Mg C/ha less than their rain‐fed pairs (p < .0001). SIC contents were negatively correlated with estimated groundwater recharge, suggesting that dissolution and leaching may be responsible for SIC losses observed. Under croplands, the remaining SIC had more modern radiocarbon and a δ13C composition that was closer to crop inputs than under native vegetation, suggesting that cultivation has led to faster turnover and incorporation of recent crop carbon into the SIC pool (p < .0001). The losses occurred just 30–100 years after land‐use changes, indicating SIC stocks that were stable for millennia can rapidly adjust to increased soil water flows. Large SIC losses (194–242 Mg C/ha) also occurred below 4.9 m deep under irrigated croplands, with SIC losses lagging behind the downward‐advancing wetting front by ~30 years, suggesting that even deep SIC were affected. These observations suggest that the vertical distribution of SIC in dry ecosystems is dynamic on decadal timescales, highlighting its potential role as a carbon sink or source to be examined in the context of land use and climate change.

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Section: Methodsmentioning

confidence: 99%

Agricultural acceleration of soil carbonate weathering

Kim

Jobbágy

Richter

et al. 2020

Global Change Biology

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“…The Institute for Nuclear Physics of the University of Cologne has purchased the 3 MV Tandetron model 4130 from the Max-Planck Institute for Biogeochemistry Jena (Germany), including the main components of the high energy mass spectrometer; the quadrupole doubled lens, the 110 • analyzing magnet and the 33 • electrostatic analyzer. The HVEE AMS system is dedicated for 14 C measurements [8].…”

Section: The 3 MV Tandem Acceleratormentioning

confidence: 99%

Ion beam techniques for nuclear waste management

et al. 2020

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An automated CO2 gas handling and injection system was developed. It is designed to dilute CO2 samples with blank gas in a mixing volume. The system is intended to be used for the characterization and quantification of 14C content in reactor graphite with accelerator mass spectrometry. A 100 kV accelerator system was developed to measure samples with high 14C content, to test the gas injection system and to measure the 3H content from gaseous releases of reactor graphite. Additionally, the Tandetron model 4130 was purchased from the Max-Planck Institute for Biogeochemistry Jena (Germany) and a concept was developed for installation at the accelerator building of the University of Cologne. With the new 3 MV system, new isotopic ratio measurements and ion beam techniques for material analysis can be performed. The system will be used for nuclear waste management measurements of isotopes, e.g. 3H, 14C, 36Cl, 41Ca and 55Fe, which are difficult to measure with other techniques.

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Accelerator Mass Spectrometry of Radiocarbon

Steinhof

2016

Radiocarbon and Climate Change

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Analysis of the background of the Jena 14C-AMS facility

Cited by 3 publications

References 17 publications

Agricultural acceleration of soil carbonate weathering

Agricultural acceleration of soil carbonate weathering

Ion beam techniques for nuclear waste management

Accelerator Mass Spectrometry of Radiocarbon

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