+1 Recommend
0 collections
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Reducing Uncertainties in Carbonate Clumped Isotope Analysis Through Consistent Carbonate‐Based Standardization


      Read this article at

          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.


          About a decade after its introduction, the field of carbonate clumped isotope thermometry is rapidly expanding because of the large number of possible applications and its potential to solve long‐standing questions in Earth Sciences. Major factors limiting the application of this method are the very high analytical precision required for meaningful interpretations, the relatively complex sample preparation procedures, and the mass spectrometric corrections needed. In this paper we first briefly review the evolution of the analytical and standardization procedures and discuss the major remaining sources of uncertainty. We propose that the use of carbonate standards to project the results to the carbon dioxide equilibrium scale can improve interlaboratory data comparability and help to solve long‐standing discrepancies between laboratories and temperature calibrations. The use of carbonates reduces uncertainties related to gas preparation and cleaning procedures and ensures equal treatment of samples and standards. We present a set of carbonate standards of diverse composition, discuss how they can be used to correct for mass spectrometric biases, and demonstrate that their use significantly improves the comparability among four laboratories. We propose that the use of these standards or of a similar set of carbonate standards will improve the comparability of data across laboratories.

          Key Points

          • Standardization and correction procedures for carbonate clumped isotopes are reviewed

          • We propose a carbonate‐based standardization scheme to improve reproducibility

          • We demonstrate improved interlaboratory comparability of clumped isotope measurements

          Related collections

          Most cited references59

          • Record: found
          • Abstract: not found
          • Article: not found

          13C–18O bonds in carbonate minerals: A new kind of paleothermometer

            • Record: found
            • Abstract: found
            • Article: not found

            The magnitude and duration of Late Ordovician-Early Silurian glaciation.

            Understanding ancient climate changes is hampered by the inability to disentangle trends in ocean temperature from trends in continental ice volume. We used carbonate "clumped" isotope paleothermometry to constrain ocean temperatures, and thereby estimate ice volumes, through the Late Ordovician-Early Silurian glaciation. We find tropical ocean temperatures of 32° to 37°C except for short-lived cooling by ~5°C during the final Ordovician stage. Evidence for ice sheets spans much of the study interval, but the cooling pulse coincided with a glacial maximum during which ice volumes likely equaled or exceeded those of the last (Pleistocene) glacial maximum. This cooling also coincided with a large perturbation of the carbon cycle and the Late Ordovician mass extinction.
              • Record: found
              • Abstract: not found
              • Article: not found

              Defining an absolute reference frame for ‘clumped’ isotope studies of CO2


                Author and article information

                Geochem Geophys Geosyst
                Geochem Geophys Geosyst
                Geochemistry, Geophysics, Geosystems : G(3)
                John Wiley and Sons Inc. (Hoboken )
                03 September 2018
                September 2018
                : 19
                : 9 ( doiID: 10.1002/ggge.v19.9 )
                : 2895-2914
                [ 1 ] Geological Institute ETH Zürich Zürich Switzerland
                [ 2 ] Department of Earth, Atmospheric and Planetary Sciences Massachusetts Institute of Technology Cambridge MA USA
                [ 3 ] Godwin Laboratory for Palaeoclimate Research, Department of Earth Sciences University of Cambridge Cambridge UK
                [ 4 ] Now at Sediment & Isotope Geology Ruhr‐Universität Bochum Bochum Germany
                [ 5 ] Bjerknes Center for Climate Research and Department of Earth Science University of Bergen Bergen Norway
                [ 6 ] Earth Science Department Utrecht University Utrecht Netherlands
                Author notes
                [*] [* ] Correspondence to: S. M. Bernasconi,

                stefano.bernasconi@ 123456erdw.ethz.ch

                Author information
                GGGE21649 2017GC007385
                ©2018. The Authors.

                This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

                : 07 December 2017
                : 11 June 2018
                : 05 July 2018
                Page count
                Figures: 6, Tables: 5, Pages: 20, Words: 11481
                Funded by: EC | H2020 | H2020 Priority Excellent Science | H2020 European Research Council (ERC)
                Award ID: No 638467
                Funded by: ETH research Grant
                Award ID: ETH‐33‐14
                Funded by: Natural Environment Research Council (NERC)
                Award ID: NE/M003752/1
                Funded by: European Research Council (ERC)
                Award ID: 638467
                Funded by: UK Natural Environmental Research Council (NERC)
                Award ID: NE/M003752/1
                Funded by: Swiss National Science foundation
                Award ID: 200020_160046
                Award ID: 200021_143485
                Award ID: 200021_169849
                Funded by: ETH
                Award ID: ETH‐33 14‐1
                Clumped Isotope Geochemistry: From Theory to Applications
                Isotopic Composition and Chemistry
                Stable Isotope Geochemistry
                Instruments and Techniques
                Oceanography: Biological and Chemical
                Stable Isotopes
                Research Article
                Research Articles
                Custom metadata
                September 2018
                Converter:WILEY_ML3GV2_TO_NLMPMC version:version=5.5.1 mode:remove_FC converted:07.11.2018

                clumped isotopes,mass spectrometry,standardization,carbonate,paleothermometry


                Comment on this article