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  Jena Reference Air Set (JRAS): a multi-point scale anchor for isotope measurements of CO2 in air

Wendeberg, M., Richter, J., Rothe, M., & Brand, W. A. (2013). Jena Reference Air Set (JRAS): a multi-point scale anchor for isotope measurements of CO2 in air. Atmospheric Measurement Techniques, 6, 817-822. doi:10.5194/amt-6-817-2013.

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http://dx.doi.org/10.5194/amt-6-817-2013 (Verlagsversion)
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 Urheber:
Wendeberg, Magnus1, Autor           
Richter, Juergen1, Autor           
Rothe, Michael1, Autor           
Brand, Willi A.1, Autor           
Affiliations:
1Service Facility Stable Isotope, Dr. W. A. Brand, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497772              

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 Zusammenfassung: The need for a unifying scale anchor for isotopes of CO2 in air was brought to light at the 11th WMO/IAEA Meeting of Experts on Carbon Dioxide in Tokyo 2001. During discussions about persistent discrepancies in isotope measurements between the worlds leading laboratories, it was concluded that a unifying scale anchor for Vienna Pee Dee Belemnite (VPDB) of CO2 in air was desperately needed. Ten years later, at the 2011 Meeting of Experts on Carbon Dioxide in Wellington, it was recommended that the Jena Reference Air Set (JRAS) become the official scale anchor for isotope measurements of CO2 in air (Brailsford, 2012). The source of CO2 used for JRAS is two calcites. After releasing CO2 by reaction with phosphoric acid, the gases are mixed into CO2-free air. This procedure ensures both isotopic stability and longevity of the CO2. That the reference CO2 is generated from calcites and supplied as an air mixture is unique to JRAS. This is made to ensure that any measurement bias arising from the extraction procedure is eliminated. As every laboratory has its own procedure for extracting the CO2, this is of paramount importance if the local scales are to be unified with a common anchor. For a period of four years, JRAS has been evaluated through the IMECC1 program, which made it possible to distribute sets of JRAS gases to 13 laboratories worldwide. A summary of data from the six laboratories that have reported the full set of results is given here along with a description of the production and maintenance of the JRAS scale anchors.

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 Datum: 2013-03-082013-03-262013
 Publikationsstatus: Erschienen
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 Identifikatoren: Anderer: BGC1767
DOI: 10.5194/amt-6-817-2013
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Titel: Atmospheric Measurement Techniques
  Kurztitel : AMT
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Göttingen : European Geosciences Union, Copernicus
Seiten: - Band / Heft: 6 Artikelnummer: - Start- / Endseite: 817 - 822 Identifikator: ISSN: 1867-1381
CoNE: https://pure.mpg.de/cone/journals/resource/1867-1381