Compatibility of Atmospheric 14CO2 Measurements: Comparing the Heidelberg Low-Level Counting Facility to International Accelerator Mass Spectrometry (AMS) Laboratories

Hammer, Samuel; Friedrich, Ronny; Kromer, Bernd; Cherkinsky, Alexander; Lehman, Scott J; Meijer, Harro A J; Nakamura, Toshio; Palonen, Vesa; Reimer, Ron W; Smith, Andrew M; Southon, John R; Szidat, Sönke; Turnbull, Jocelyn; Uchida, Masao (2017). Compatibility of Atmospheric 14CO2 Measurements: Comparing the Heidelberg Low-Level Counting Facility to International Accelerator Mass Spectrometry (AMS) Laboratories. Radiocarbon, 59(03), pp. 875-883. Arizona Board of Regents, University of Arizona 10.1017/RDC.2016.62

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Combining atmospheric Δ14CO2 data sets from different networks or laboratories requires secure knowledge on their compatibility. In the present study, we compare Δ14CO2 results from the Heidelberg low-level counting (LLC) laboratory to 12 international accelerator mass spectrometry (AMS) laboratories using distributed aliquots of five pure CO2 samples. The averaged result of the LLC laboratory has a measurement bias of –0.3 ±0.5‰ with respect to the consensus value of the AMS laboratories for the investigated atmospheric Δ14C range of 9.6 to 40.4‰. Thus, the LLC measurements on average are not significantly different from the AMS laboratories, and the most likely measurement bias is smaller than the World Meteorological Organization (WMO) interlaboratory compatibility goal for Δ14CO2 of 0.5‰. The number of intercomparison samples was, however, too small to determine whether the measurement biases of the individual AMS laboratories fulfilled the WMO goal.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Departement of Chemistry and Biochemistry
10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR)

UniBE Contributor:

Szidat, Sönke

Subjects:

500 Science > 570 Life sciences; biology
500 Science > 540 Chemistry

ISSN:

0033-8222

Publisher:

Arizona Board of Regents, University of Arizona

Language:

English

Submitter:

Sönke Szidat

Date Deposited:

02 Aug 2017 14:11

Last Modified:

12 Sep 2017 18:20

Publisher DOI:

10.1017/RDC.2016.62

BORIS DOI:

10.7892/boris.101383

URI:

https://boris.unibe.ch/id/eprint/101383

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