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International-Soil-Radiocarbon-Database / ISRaD

Repository for the development and release of ISRaD data and tools
https://international-soil-radiocarbon-database.github.io/ISRaD/
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Bad %C and %N in Gentsch_2018 #271

Open CaitlinPries opened 11 months ago

CaitlinPries commented 11 months ago

The %C and %N data in Gentsch_2018 are not correct. We are talking tiny %C of 0.004 and in many cases the %N is greater than the %C. These data do not match what is in Table 1 of the paper, which only shows means. I have looked at the supplement, but I cannot find data for individual samples except for 14C, so I am not sure where these data came from. This template was entered by Jeff according to the metadata.

jb388 commented 11 months ago

Thanks for finding this Caitlin. I seem to remember going through this with @SophievF at one point---either because the CN ratios were so abnormal, or the 15N data were---but I'll check it again and report back.

jb388 commented 11 months ago

So it looks like the fraction C and N data got scrambled together somehow. Thanks for catching that. I fixed the template and uploaded the new version to github. I ran summary statistics on the source data (an external worksheet from Gentch), and the data still diverge---in some cases substantially. But even the sample numbers are different, so I'm not quite sure how to explain the discrepancy...