Articles | Volume 9, issue 11
Research article
25 Nov 2016
Research article |  | 25 Nov 2016

Stratospheric Air Sub-sampler (SAS) and its application to analysis of Δ17O(CO2) from small air samples collected with an AirCore

Dorota Janina Mrozek, Carina van der Veen, Magdalena E. G. Hofmann, Huilin Chen, Rigel Kivi, Pauli Heikkinen, and Thomas Röckmann

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Cited articles

Alexander, B., Vollmer, M. K., Jackson, T., Weiss, R. F., and Thiemens, M. H.: Stratospheric CO2 isotopic anomalies and SF6 and CFC tracer concentrations in the Arctic polar vortex, Geophys. Res. Lett., 28, 4103–4106, 2001.
APCG: IMAU-APCG measurements data, available at:, last access: 17 November 2016.
Assonov, S. S. and Brenninkmeijer, C. A. M.: A new method to determine the 17O isotopic abundance in CO2 using oxygen isotope exchange with a solid oxide, Rapid Commun. Mass Sp., 15, 2426–2437,, 2001.
Assonov, S. S. and Brenninkmeijer, C. M.: Reporting small Δ17O values: existing definitions and concepts, Rapid Commun. Mass Sp., 19, 627–636,, 2005.
Assonov, S. S. and Brenninkmeijer, C. A. M.: On the N2O correction used for mass spectrometric analysis of atmospheric CO2, Rapid Commun. Mass Sp., 20, 1809–1819,, 2006.
Short summary
Stratospheric Air Sub-sampler (SAS) is a device to collect and to store the stratospheric profile of air collected with an AirCore (Karion et al., 2010) in numerous sub-samples. The sub-samples (each of 25 mL at ambient temperature and pressure) can be later introduced to the continuous flow systems to measure for example the isotopic composition of CO2. The performance of the coupled system is demonstrated for a set of air samples from an AirCore flight in November 2014 near Sodankylä, Finland.