Ancient atmospheric triple oxygen isotope signatures preserved in fossilized cosmic spherules constrain paleo-CO₂ levels

Fabian Zahnow^1,2, Martin D. Suttle^3,4, Marina Lazarov⁵, Stefan Weyer⁵, Tommaso Di Rocco², Luigi Folco⁴, Andreas Pack²

¹Ruhr-Universität Bochum, Germany; ²Georg-August-Universität Göttingen, Germany; ³The Open University, UK; ⁴Università di Pisa, Italy; ⁵Leibnitz Universität Hannover, Germany

Testing the accuracy of palaeo-CO2 estimates from the Franks leaf gas exchange model

Hannah Morck, Phillip E. Jardine

Institute of Geology and Palaeontology, University of Münster, Germany

Dual clumped isotope thermometry of speleothems

Jens Fiebig¹, Christoph Spoetl², Ana Moreno-Caballud³, Haiwei Zhang⁴, Gabriella Koltai², Gina Moseley², Miguel Bernecker¹, Philip Staudigel¹, Monika Markowska⁵, Hubert Vonhof⁶

¹Goethe University Frankfurt, Germany; ²University of Innsbruck, Austria; ³CSIC Zaragoza, Spain; ⁴Xi'an Jiaotong University, China; ⁵Northumbria University, UK; ⁶MPI Mainz, Germany

How seasonality drives interglacial permafrost thaw: Insights from speleothems and climate modelling

Jan Nitzbon^1,2, Moritz Langer^1,3, Luca Alexander Müller-Ißberner², Elisabeth Dietze², Martin Werner¹

¹Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Germany; ²Institute of Geography Göttingen, Germany; ³Vrije Universiteit Amsterdam, The Netherlands

Beyond δ-values: Examples from triple magnesium- and triple silicon isotopes

Michael Tatzel

Universität Göttingen, Germany

Effects of mineralogy on carbonate clumped isotope composition below analytical resolution

Miguel Bernecker¹, Magali Bonifacie², Philip Staudigel¹, Niels Meijer³, Julien Siebert², Nicolas Wehr², Eiken Haussühl¹, Stefano M. Bernasconi⁴, Daniel A. Petrash⁵, Martin Dietzel⁶, Jens Fiebig¹

¹Institut für Geowissenschaften, Goethe-Universität Frankfurt, Altenhöferallee 1, 60438 Frankfurt am Main, Germany; ²Université Paris Cité, Institut de Physique du Globe de Paris, CNRS, F-75005 Paris, France; ³Senckenberg Biodiversität und Klima Forschungscenter, Senckenberganlage 25, 60325 Frankfurt am Main, Germany; ⁴Department of Earth and Planetary Sciences, ETH Zürich, Sonneggstrasse 5, 8092 Zürich, Switzerland; ⁵Department of Environmental Geochemistry and Biogeochemistry, Czech Geological Survey, 15200 Prague, Czechia; ⁶Institute of Applied Geosciences, Graz University of Technology, Rechbauerstraße 12, Graz 8010, Austria