Articles | Volume 18, issue 23
https://doi.org/10.5194/amt-18-7405-2025
https://doi.org/10.5194/amt-18-7405-2025
Research article
 | 
05 Dec 2025
Research article |  | 05 Dec 2025

Sensitivity of tunable infrared laser spectroscopic measurements of Δ′17O in CO2 to analytical conditions

David Bajnai and Vincent J. Hare

Cited articles

Adnew, G. A., Hofmann, M. E. G., 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, https://doi.org/10.1002/rcm.8478, 2019. 
Adnew, G. A., Koren, G., Mehendale, N., Gromov, S., Krol, M., and Röckmann, T.: Triple oxygen isotope composition of CO2 in the upper troposphere and stratosphere, Atmos. Meas. Tech., 18, 2701–2719, https://doi.org/10.5194/amt-18-2701-2025, 2025. 
Affek, H. P., Barkan, E., Tal, Y., Steidle, S. D., Wendt, K. A., Spötl, C., Edwards, R. L., Fishman, E., and Dublyansky, Y.: 17Oexcess in Devils Hole calcite: an indicator of equilibrium fractionation and paleo moisture sources, Earth Planet. Sci. Lett., 667, 119528, https://doi.org/10.1016/j.epsl.2025.119528, 2025. 
Bajnai, D. and Hare, V. J.: Supplementary material for: Sensitivity of tunable infrared laser spectroscopic measurements of Δ17O in CO2 to analytical conditions, Zenodo [data set], https://doi.org/10.5281/zenodo.15742110, 2025. 
Bajnai, D., Pack, A., Arduin Rode, F., Seefeld, M., Surma, J., and Di Rocco, T.: A dual inlet system for laser spectroscopy of triple oxygen isotopes in carbonate-derived and air CO2, Geochem. Geophys. Geosyst., 24, e2023GC010976, https://doi.org/10.1029/2023GC010976, 2023. 
Download
Short summary
Rare forms of oxygen, called isotopes, in carbon dioxide help scientists understand important atmopsheric processes, for example where CO2 comes from. In this paper, we examined how to improve the accuracy of a laser-based method for measuring oxygen isotopes in CO2, focusing on the rare mass-17 isotope. By testing instruments in two labs, we identified ways to make the results more reliable. Our findings provide practical guidance and support wider use of this method in environmental studies.
Share