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Atmospheric CO2, δ(O2/N2) and δ13CO2 measurements at Jungfraujoch, Switzerland: results from a flask sampling intercomparison program

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons62345

Brand,  Willi A.
Service Facility Stable Isotope, Dr. W. A. Brand, Max Planck Institute for Biogeochemistry, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons62423

Jordan,  Armin
Service Facility Gas Analytical Laboratory, Dr. A. Jordan, Max Planck Institute for Biogeochemistry, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons62528

Richter,  Juergen
Service Facility Stable Isotope, Dr. W. A. Brand, Max Planck Institute for Biogeochemistry, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons62534

Rothe,  Michael
Service Facility Stable Isotope, Dr. W. A. Brand, Max Planck Institute for Biogeochemistry, Max Planck Society;

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Zitation

van der Laan-Luijkx, I. T., van der Laan, S., Uglietti, C., Schibig, M. F., Neubert, R. E. M., Meijer, H. A. J., et al. (2013). Atmospheric CO2, δ(O2/N2) and δ13CO2 measurements at Jungfraujoch, Switzerland: results from a flask sampling intercomparison program. Atmospheric Measurement Techniques, 6, 1805-1815. doi:10.5194/amt-6-1805-2013.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0014-182E-C
Zusammenfassung
We present results from an intercomparison program of CO2, (O2/N2) and 13CO2 measurements from atmospheric flask samples. Flask samples are collected on a biweekly basis at the High Altitude Research Station Jungfraujoch in Switzerland for three European laboratories: the University of Bern, Switzerland, the University of Groningen, the Netherlands and the Max Planck Institute for Biogeochemistry in Jena, Germany. Almost 4 years of measurements of CO2, (O2/N2) and 13CO2 are compared in this paper to assess the measurement compatibility of the three laboratories. While the average difference for the CO2 measurements between the laboratories in Bern and Jena meets the required compatibility goal as defined by the World Meteorological Organization, the standard deviation of the average differences between all laboratories is not within the required goal. However, the obtained annual trend and seasonalities are the same within their estimated uncertainties. For (O2/N2) significant differences are observed between the three laboratories. The comparison for 13CO2 yields the least compatible results and the required goals are not met between the three laboratories. Our study shows the importance of regular intercomparison exercises to identify potential biases between laboratories and the need to improve the quality of atmospheric measurements.