Data from: High Accuracy 14C Measurements for Atmospheric CO2 Samples from the South Pole and Point Barrow, Alaska by Accelerator Mass Spectrometry
Meijer, H. (Creator), Pertuisot, M. (Creator), Plicht, van der, J. (Creator) & Blasing, T. J. (Data Manager), US Department of Energy, 1-Jan-2006
Typically, the extracted CO2 from 2-5 flasks from consecutive weekly measurements were put together in one flame-off tube. The tubes were broken in the standard inlet arrangement of a dual inlet stable isotope ratio mass spectrometer,
and a stable isotope measurement was performed using the same instrument used in the original analyses (Roeloffzen et al., 1991).
Then, the CO2 was cryogenically trapped and converted to graphite (Aerts-Bijma et al., 1997). For the majority of the samples the amount of CO2 was sufficient for our regular, 2 mm diameter AMS targets, containing about 1.5 mg of C. For most of these, two targets could be produced from one CO2 flask. In some cases, however, the amount of CO2 was only sufficient for a smaller target.
Individual standard samples were graphitized along with the corresponding atmospheric CO2 samples, so that any day to day variability in the graphitization circumstances would be visible in the standard samples.
The 14C is reported as ∆14C as per Stuiver and Polach 1977. More information about 14C standards can be found at:
More information about sample preparation and analysis at the Groningen AMS can be found at: https://www.rug.nl/ees/onderzoek/programmas/radiocarbonams/sampleTreatmentAms The primary literature reference for the material presented here is Meijer et al. (2006).
The statistical analysis included curve fitting described by Cleveland (1979). A seasonal pattern was then fit to the residuals, and the data are given in terms of these trends and departures from them.
|Date made available||1-Jan-2006|
|Publisher||US Department of Energy|
|Geographical coverage||South Pole, Point Barrow|
|Access to the dataset||Open|
- C14, 14C, Atmospheric C14, Atmospheric 14CO2, Flask samples, accelerator mass spectrometry, accelerator mass spectroscopy, Smoothed 14CO2 concentration
Keywords on Datasets
- Meijer, H. A. J., Pertuisot, M. H. & van der Plicht, J., 2006, In : Radiocarbon. 48, 3, p. 355-372 18 p.
Research output: Contribution to journal › Article › Academic › peer-review