Radiocarbon measurements of dissolved inorganic carbon (DIC) in sediment porewater and seawater at AWI Micadas
Bibliographic Data
| ID | 6447990 |
|---|---|
| Authors | Hendrik Grotheer (0000-0003-0207-3767), Jens S Hammes (0000-0002-4502-3789), Torben Gentz (0000-0001-6739-5359), Maxi Castrillejo (0000-0001-5149-2218), Lukas Wacker (0000-0002-8215-2678), Roberta L Hansman (0000-0003-1525-8509), Gesine Mollenhauer (0000-0001-5138-564X) |
| Year | 2025 |
| Volume | 67 |
| Issue | 2 |
| Pages | 297-306 |
| Publication date | 2025-01-21 |
| Peer Reviewed | Yes |
| 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.2024.139 |
| OpenAlex | W4406630110 |
| Language | EN |
| References cited | 29 |
Radiocarbon ( 14 C) measurements on dissolved inorganic carbon (DIC) are a powerful tool to trace water masses and carbon cycling in the ocean. Existing methodologies to determine the 14 C content of seawater DIC requires large volumes of sample (usually >100 mL) and specialized graphitization techniques to achieve the accuracy and precision needed for meaningful data interpretation. The advancement of the CO 2 gas ionization accelerator mass spectrometry (AMS) technique today allows routine 14 C measurements on small samples (<100 μgC) and may thus permit reducing the sample volumes needed to determine 14 C content of seawater DIC to ∼2 mL. The proposed method utilizes the carbonate handling system (CHS), gas interface system (GIS) and MICADAS AMS, and provides good accuracy but reduced precision compared to established methods. Good accuracy is shown by comparing results for a marine in-house DIC standard and a DIC seawater profile from Antarctica between the proposed CHS-GIS-MICADAS approach and reference measurements conducted on the same material at established laboratories (ETH and NOSAMS). Further, two sedimentary porewater profiles from a fjord system in Svalbard are presented. Despite good agreement, the precision of the CHS-GIS-MICADAS approach is reduced, potentially limiting possible interpretations on seawater DIC. Nonetheless, the reduction of sample volumes proves particularly helpful to analyze porewater DIC from sediment cores, where sample material is notoriously limited, reduces the required amounts of toxic HgCl 2 and simplifies expedition logistics
Carbon dioxide · Carbon fibers · Dissolved organic carbon · Geochemistry · Geomorphology · Radiocarbon dating · Seawater · Sediment · Total inorganic carbon · Chemistry · Environmental Science · Geology and Paleoclimatology Research · Isotope Analysis in Ecology · Maritime and Coastal Archaeology · Environmental Chemistry · Geology · Oceanography · Paleontology
Bats
Micadas
The Rapid Preparation of Seawater ΣCO 2 for Radiocarbon Analysis at the National Ocean Sciences Ams Facility
Comparability of Radiocarbon Measurements in Dissolved Inorganic Carbon of Seawater Produced at Eth-Zurich
The Impact of Leaching on Radiocarbon Ages of Small-Sized Foraminifera Samples
High Precision 14 C Analysis in Small Seawater Samples
Marine Organic Carbon and Radiocarbon—present and Future Challenges
Identification in Pore Waters of Recycled Sediment Organic Matter Using the Dual Isotopic Composition of Carbon ( Δ 13 C and Δ 14 C)
Isotopic Signature (δ 13 C, ∆ 14 C) of DIC in Sediment Pore Waters
| Citation velocity | historical |
|---|---|
| Highly cited | No |