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Jan Kaiser, How accurate do we know 13C/12C, 18C/16O and 17O ...

Jan Kaiser, How accurate do we know 13C/12C, 18C/16O and 17O ...

Jan Kaiser, How accurate do we know 13C/12C, 18C/16O and 17O ...

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Conclusions<br />

Agreed isobaric correction <strong>and</strong> normalisation schemes<br />

improve reproducibility (<strong>and</strong> maybe trueness) of δ values.<br />

Several minor issues remain for the accuracy of δ values<br />

confirmation of C (<strong>and</strong> D)<br />

17<br />

Δ value of tropospheric CO 2<br />

relative ionisation efficiency of 12 C 17 O 16 O<br />

Major issues remain for the accuracy of R values<br />

13<br />

R(VPDB-CO 2 ): converging?<br />

18<br />

R(VPDB-CO 2 ): converged<br />

17<br />

R(VPDB-CO 2 ): diverging [but can be linked to 13 R]

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