Articles | Volume 14, issue 6
Atmos. Meas. Tech., 14, 4279–4304, 2021
https://doi.org/10.5194/amt-14-4279-2021
Atmos. Meas. Tech., 14, 4279–4304, 2021
https://doi.org/10.5194/amt-14-4279-2021

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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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.