Articles | Volume 14, issue 6
Atmos. Meas. Tech., 14, 4279–4304, 2021
Atmos. Meas. Tech., 14, 4279–4304, 2021

Research article 09 Jun 2021

Research article | 09 Jun 2021

Simultaneous measurement of δ13C, δ18O and δ17O of atmospheric CO2 – performance assessment of a dual-laser absorption spectrometer

Pharahilda M. Steur et al.

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Cited articles

Adnew, G. A., Hofmann, M. E., Paul, D., Laskar, A., Surma, J., Albrecht, N., Pack, A., Schwieters, J., Koren, G., Peters, W., and Röckmann, T.: Determination of the triple oxygen and carbon isotopic composition of CO2 from atomic ion fragments formed in the ion source of the 253 Ultra high‐resolution isotope ratio mass spectrometer, Rapid Commun. Mass Spectrom., 33, 1363–1380,, 2019. a, b
Allison, C. and Francey, R.: High precision stable isotope measurements of atmospheric trace gases, Reference and intercomparison materials for stable isotopes of light elements, IAEA-TECDOC, Vienna, 131–154, 1995. a
Allison, C., Francey, R., and Meijer, H.: Recommendations for the reporting of stable isotope measurements of carbon and oxygen in CO2 gas, IAEA-TECDOC, Vienna, 155–162, 1995. a
Assonov, S. S. and Brenninkmeijer, C. A. M.: On the 17O correction for CO2 mass spectrometric isotopic analysis, Rapid Commun. Mass Spectrom., 17, 1007–1016,, 2003. a
Barkan, E. and Luz, B.: High-precision measurements of 17O/16O and 18O/16O ratios in CO2, Rapid Commun. Mass Spectrom., 26, 2733–2738,, 2012. a
Short summary
For understanding the sources and sinks of atmospheric CO2, measurement of stable isotopes has proven to be highly valuable. We present a new method using laser absorption spectroscopy to simultaneously conduct measurements of three CO2 isotopes, directly on dry-air samples. This new method reduces sample preparation time significantly, compared to the conventional method in which measurements are conducted on pure CO2, and avoids measurement biases introduced by CO2 extraction.