Interlaboratory study for coral Sr/Ca and other element/Ca ratio measurements

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dc.contributor.authorHathorne, ECen_AU
dc.contributor.authorGagnon, Aen_AU
dc.contributor.authorFelis, Ten_AU
dc.contributor.authorAdkins, Jen_AU
dc.contributor.authorAsami, Ren_AU
dc.contributor.authorBoer, Wen_AU
dc.contributor.authorCaillon, Nen_AU
dc.contributor.authorCase, Den_AU
dc.contributor.authorCobb, KMen_AU
dc.contributor.authorDouville, Een_AU
dc.contributor.authordeMenocal, Pen_AU
dc.contributor.authorEisenhauer, Aen_AU
dc.contributor.authorGarbe-Schönberg, Den_AU
dc.contributor.authorGeibert, Wen_AU
dc.contributor.authorGoldstein, Sen_AU
dc.contributor.authorHughen, Ken_AU
dc.contributor.authorInoue, Men_AU
dc.contributor.authorKawahata, Hen_AU
dc.contributor.authorKölling, Men_AU
dc.contributor.authorCornec, FLen_AU
dc.contributor.authorLinsley, BKen_AU
dc.contributor.authorMcGregor, HVen_AU
dc.contributor.authorMontagna, Pen_AU
dc.contributor.authorNurhati, ISen_AU
dc.contributor.authorQuinn, TMen_AU
dc.contributor.authorRaddatz, Jen_AU
dc.contributor.authorRebaubier, Hen_AU
dc.contributor.authorRobinson, Len_AU
dc.contributor.authorSadekov, Aen_AU
dc.contributor.authorSherrell, Ren_AU
dc.contributor.authorSinclair, Den_AU
dc.contributor.authorTudhope, AWen_AU
dc.contributor.authorWei, GJen_AU
dc.contributor.authorWong, HKYen_AU
dc.contributor.authorWu, HCen_AU
dc.contributor.authorYou, CFen_AU
dc.date.accessioned2022-09-02T03:49:04Zen_AU
dc.date.available2022-09-02T03:49:04Zen_AU
dc.date.issued2013-07-25en_AU
dc.date.statistics2022-09-01en_AU
dc.description.abstractThe Sr/Ca ratio of coral aragonite is used to reconstruct past sea surface temperature (SST). Twenty-one laboratories took part in an interlaboratory study of coral Sr/Ca measurements. Results show interlaboratory bias can be significant, and in the extreme case could result in a range in SST estimates of 7°C. However, most of the data fall within a narrower range and the Porites coral reference material JCp-1 is now characterized well enough to have a certified Sr/Ca value of 8.838 mmol/mol with an expanded uncertainty of 0.089 mmol/mol following International Association of Geoanalysts (IAG) guidelines. This uncertainty, at the 95% confidence level, equates to 1.5°C for SST estimates using Porites, so is approaching fitness for purpose. The comparable median within laboratory error is <0.5°C. This difference in uncertainties illustrates the interlaboratory bias component that should be reduced through the use of reference materials like the JCp-1. There are many potential sources contributing to biases in comparative methods but traces of Sr in Ca standards and uncertainties in reference solution composition can account for half of the combined uncertainty. Consensus values that fulfil the requirements to be certified values were also obtained for Mg/Ca in JCp-1 and for Sr/Ca and Mg/Ca ratios in the JCt-1 giant clam reference material. Reference values with variable fitness for purpose have also been obtained for Li/Ca, B/Ca, Ba/Ca, and U/Ca in both reference materials. In future, studies reporting coral element/Ca data should also report the average value obtained for a reference material such as the JCp-1. ©2013 American Geophysical Unionen_AU
dc.description.sponsorshipHVM was supported by an AINSE Research Fellowship.en_AU
dc.identifier.citationHathorne, E. C., Gagnon, A., Felis, T., Adkins, J., Asami, R., Boer, W., Caillon, N., Case, D., Cobb, K. M., Douville, E., deMenocal, P., Eisenhauer, A., Garbe-Schönberg, D., Geibert, W., Goldstein, S., Hughen, K., Inoue, M., Kawahata, H., Kölling, M., Cornec, F. L., Linsley, B. K., McGregor, H. V., Montagna, P., Nurhati, I. S., Quinn, T. M., Raddatz, J., Rebaubier, H., Robinson, L., Sadekov, A., Sherrell, R., Sinclair, D., Tudhope, A. W., Wei, G., Wong, H., Wu, H. C., & You, C.- F. (2013). Interlaboratory study for coral Sr/Ca and other element/Ca ratio measurements. Geochemistry, Geophysics, Geosystems, 14(9), 3730-3750. doi:10.1002/ggge.20230en_AU
dc.identifier.issn1525-2027en_AU
dc.identifier.issue9en_AU
dc.identifier.journaltitleGeochemistryen_AU
dc.identifier.pagination3730-3750en_AU
dc.identifier.urihttps://doi.org/10.1002/ggge.20230en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/13718en_AU
dc.identifier.volume14en_AU
dc.language.isoenen_AU
dc.publisherJohn Wiley & Sons, Incen_AU
dc.subjectCoralsen_AU
dc.subjectStrontiumen_AU
dc.subjectCalciumen_AU
dc.subjectInterlaboratory comparisonsen_AU
dc.subjectAmbient temperatureen_AU
dc.subjectMagnesiumen_AU
dc.subjectData covariancesen_AU
dc.titleInterlaboratory study for coral Sr/Ca and other element/Ca ratio measurementsen_AU
dc.typeJournal Articleen_AU
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