IMIS | Vlaams Instituut voor de Zee

Vlaams Instituut voor de Zee

Platform voor marien onderzoek


Publicaties | Instituten | Personen | Datasets | Projecten | Kaarten
[ meld een fout in dit record ]mandje (0): toevoegen | toon Print deze pagina

Dual clumped isotope thermometry resolves kinetic biases in carbonate formation temperatures
Bajnai, D.; Guo, W.; Spötl, C.; Coplen, T.B.; Methner, K.; Löffler, N.; Krsnik, E.; Gischler, E.; Hansen, M.; Henkel, D.; Price, G.D.; Raddatz, J.; Scholz, D.; Fiebig, J. (2020). Dual clumped isotope thermometry resolves kinetic biases in carbonate formation temperatures. Nature Comm. 11(1): 9 pp.
In: Nature Communications. Nature Publishing Group: London. ISSN 2041-1723; e-ISSN 2041-1723, meer
Peer reviewed article  

Beschikbaar in  Auteurs 

Auteurs  Top 
  • Bajnai, D.
  • Guo, W.
  • Spötl, C.
  • Coplen, T.B.
  • Methner, K.
  • Löffler, N.
  • Krsnik, E.
  • Gischler, E.
  • Hansen, M.
  • Henkel, D.
  • Price, G.D.
  • Raddatz, J.
  • Scholz, D.
  • Fiebig, J.

    Surface temperature is a fundamental parameter of Earth’s climate. Its evolution through time is commonly reconstructed using the oxygen isotope and the clumped isotope compositions of carbonate archives. However, reaction kinetics involved in the precipitation of carbonates can introduce inaccuracies in the derived temperatures. Here, we show that dual clumped isotope analyses, i.e., simultaneous ∆47 and ∆48 measurements on the single carbonate phase, can identify the origin and quantify the extent of these kinetic biases. Our results verify theoretical predictions and evidence that the isotopic disequilibrium commonly observed in speleothems and scleractinian coral skeletons is inherited from the dissolved inorganic carbon pool of their parent solutions. Further, we show that dual clumped isotope thermometry can achieve reliable palaeotemperature reconstructions, devoid of kinetic bias. Analysis of a belemnite rostrum implies that it precipitated near isotopic equilibrium and confirms the warmer-than-present temperatures during the Early Cretaceous at southern high latitudes.

Alle informatie in het Integrated Marine Information System (IMIS) valt onder het VLIZ Privacy beleid Top | Auteurs