Compound Specific Stable Sulfur Isotope Analysis (δ³⁴S and δ³³S) of Organic Compounds Using Gas Chromatography Hyphenated with Multiple Collector Inductively Coupled Plasma Mass Spectrometry (GC-MC-ICPMS)

Steffen Kümmel¹, Faina Gelman², Axel Horst¹, Harald Strauß³, Richnow Hans H.¹, Matthias Gehre¹

1: Helmholtz-Zentrum für Umweltforschung GmbH - UFZ, Leipzig, Germany; 2: Geological Survey of Israel, Jerusalem, Israel; 3: Westfälische Wilhelms-Universität Münster, Institut für Geologie und Paläontologie, Münster, Germany

New Frontiers in Compound-Specific δ²H Analysis

S. K. Lengger^1,2,3, S. Kelly⁴, K. W. R. Taylor⁵, R. Berstan⁵, M. Seed⁵, I. D. Bull¹, J. Blewett¹, R. D. Pancost¹

1: University of Bristol, UK; 2: University of Plymouth, UK; 3: Silicon Austria Labs, Austria; 4: International Atomic Energy Agency, Austria; 5: Elementar UK Ltd, UK

A quick one-step sample preparation method with 2,2-Dimethoxypropane (DMP) for isotopic fingerprint analysis of vegetable oil – how does DMP influence the accuracy of the C- and H-CSIA by GC-C/Py-IRMS?”

Lili Xia, Kaori Sakaguchi-Söder, Daniel Stanojkovski, Liselotte Schebek

Stoffstrommanagement und Ressourcenwirtschaft, Institut IWAR, TU Darmstadt

Revisiting SPIN-MIRMS: N-isotopic composition of nitrate and ammonium from aquaeous solutions by isotope ratio mass spectrometry

Jens Dyckmans¹, Wolfram Eschenbach¹, Reinhard Langel¹, Lars Szwec¹, Reinhard Well²

1: Universität Göttingen, Kompetenzzentrum Stabile Isotope, Deutschland; 2: Thuenen Institut für Agrarrelevante Klimaforschung, Braunschweig, Deutschland

δ¹³C Analysis of DOC from Liquid Samples - Proof of Concept

Isabell von Rein, Heike Geilmann, Heiko Moossen

Max-Planck-Institut für Biogeochemie, Deutschland

Comprehensive Isotope Ratio MS of Oxyanions with an Electrospray-Orbitrap

Andreas Hilkert¹, Cajetan Neubauer²

1: Thermo Fisher Scientific, Deutschland; 2: University of Colorado, Boulder, USA

The next leap forward in gas IRMS

Mario Tuthorn, Jenny Roberts, Oliver Kracht, Dieter Juchelka, Andreas Hilkert

Thermo Fisher Scientific, Deutschland

Improved throughput for δ¹⁸O and δD measurements of water with Cavity Ring-Down Spectroscopy

Magdalena Hofmann¹, Jan Woźniak¹, Zhiwei Lin², Keren Drori²

1: Picarro B.V., Niederlande; 2: Picarro Inc., USA

A new infiltration optimized tracer application method for 15N and 18O tracers in field soil experiments

Arne Tenspolde¹, Jaqueline Berendt¹, Nicole Wrage-Mönnig¹, Tim J. Clough²

1: Institut für Grünland und Futterbauwissenschaften, Agrar- und Umweltwissenschaftliche Fakultät, Universität Rostock, 18059 Rostock; 2: Soil and Physical Sciences Department, Faculty of Agriculture and Life Sciences, Lincoln University, PO Box 84, Lincoln, 7647, New Zealand

Oxygen is all around...

Johannes A.C. Barth¹, Robert van Geldern²

1: GeoZentrum Nordbayern, Deutschland; 2: Friedrich-Alexander-Universität Erlangen-Nürnberg

Impact of the 2018-2020 drought in Central Germany on the nitrogen cycling in a meso-scale catchment: Insights from hydrochemical and stable isotope investigations

Christin Mueller, Ronald Krieg, Ralf Merz, Kay Knoeller

Helmholtz Centre for Environmental Research UFZ, Deutschland

Spatiotemporal analysis of Central European young water fractions

Michael Stockinger, Christine Stumpp

Universität für Bodenkultur, Wien, Österreich

Stable water isotope analysis and improved lumped-parameter modeling for characterizing unsaturated subsurface flow

Anne Imig, Fatemeh Shajari, Florian Konrad, Florian Einsiedl, Arno Rein

Chair of Hydrogeology, Faculty of Civil, Geo and Environmental Engineering, Technical University of Munich, Germany

Identifizierung von Oberflächenwasser-Grundwasser-Interaktionen anhand von charakteristischen Isotopensignalen

Michael Engel^1,2, Simon Mischel¹, Sabrina Quanz¹, Dirk Radny¹, Francesco Comiti², Lars Düster¹, Axel Schmidt¹

1: Bundesanstalt für Gewässerkunde, Deutschland; 2: Freie Universität Bozen-Bolzano, Italien

Stable water isotopes as natural tracers in a hydrogeological study of riverbank filtration in N’Djamena, Chad

Maike Gröschke, Lilli Witt, Paul Königer, Sara Vassolo

Federal Institute for Geosciences and Natural Resources (BGR), Groundwater Resources - Quality and Dynamics

Isotopen-hydrobiogeochemische Untersuchungen an anoxischen Grundwässern off- und on-shore der norddeutschen Küste

Michael Ernst Böttcher^1,2,3, Anna-Kathrina Jenner^1,3, Cátia M.E. von Ahn^1,2, Iris Schmiedinger¹, Andreas Roskam⁴

1: Leibniz Institute of Baltic Sea Research (IOW), Deutschland; 2: University of Greifswald, Deutschland; 3: University of Rostock, Deutschland; 4: NLWKN Aurich, Deutschland

Measuring high-resolution geochemical depth-profiles in hyporheic stream sediments with focus on aerobic and anaerobic methane oxidation

Tamara Michaelis, Anja Wunderlich, Florian Einsiedl

Technische Universität München, Lehrstuhl Hydrogeologie, Deutschland

Karstic springs as strong emitters of CO₂

Kern Lee^1,2, Robert van Geldern¹, Johannes Barth¹

1: Friedrich-Alexander Universität Erlangen-Nürnberg (FAU), Deutschland; 2: Alberta Environment and Parks, Edmonton, Canada

Neue Einblicke in die Infiltrationsbedingungen des Oberjura Thermalwassers in der südlichen Bayerischen Molasse mit Hilfe der ¹⁴C_DOC Methode

Theis Winter, Florian Einsiedl

Technische Universität München, Deutschland

Supporting the interpretation of δ¹⁵N values of dissolved NH₄⁺ and NO₃⁻ in the water column of a seasonal stratified lake using Numerical modeling and PCR gene amplification

Gisela Alejandra Pena Sanchez¹, Florian Einsiedl¹, Clara Duffner^2,4, Stephanie Schulz^2,4, Bernhard Mayer³, Anja Wunderlich¹

1: Technical University of Munich; 2: TUM School of Life Sciences; 3: University of Calgary; 4: Helmholtz Centre Munich

Investigation of chloroform degradation mechanisms using multi-dimensional isotope fractionation analysis: Hydrodechlorination over Pd and Rh vs reductive dechlorination with Fe⁰

Berhane Abrha Asfaw^1,2, Kaori Sakaguchi-Söder², Christoph Schüth¹

1: Hydrogeology, Institute IAG, TU Darmstadt; 2: Material Flow Management and Resource Economics, Institute IWAR, TU Darmstadt

Carbon isotope excursions in a Paleocene to early Eocene lignite bearing succession at the southern edge of the proto-North Sea (Schöningen, Germany)

Olaf K. Lenz^1,2, Mara Montag², Volker Wilde¹, Katharina Methner^3,5, Walter Riegel¹, Andreas Mulch^3,4

1: Senckenberg Forschungsinstitut und Naturmuseum Frankfurt, Deutschland; 2: Technische Universität Darmstadt, Institut Für Angewandte Geowissenschaften, Deutschland; 3: Senckenberg Biodiversity and Climate Research Centre (SBiK-F), Frankfurt am Main, Deutschland; 4: Goethe Universität Frankfurt, Institut für Geowissenschaften, Frankfurt am Main, Deutschland; 5: Stanford University, Department of Earth System Science, Department of Geological Sciences, USA

¹⁸O analyses of bulk lipids as novel paleoclimate tool in loess research – a pilot study

Jakob Labahn¹, Philip Hirschmann¹, Lucas Bittner¹, Diana Burghardt², Bruno Glaser³, Slobodan Markovic⁴, Michael Zech¹

1: Physische Geographie mit SP Paläoumweltforschung, Technische Universität Dresden, Deutschland; 2: Institut für Grundwasserwirtschaft, Technische Universität Dresden; 3: Bodenbiogeochemie, Martin-Luther-Universität Halle-Wittenberg; 4: Universität Novi Sad, Serbien

Plant and fungal contributions to soil organic matter fractions assessed by 13C and 15N isotope natural abundances

Saskia Klink¹, Adrienne Keller², Andreas Wild¹, Vera Baumert⁴, Matthias Gube⁵, Eva Lehndorff³, Nele Meyer³, Carsten Mueller⁶, Richard Phillips², Johanna Pausch¹

1: Department of Agroecology, Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Germany; 2: Department of Biology, Indiana University Bloomington, IN, USA; 3: Department Soil Ecology, Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Germany; 4: Chair of Soil Science, School of Life Sciences, Technical University of Munich, Freising, Germany; 5: Soil Science of Temperate Ecosystems, Büsgen-Institute, Georg-August University Göttingen, Germany; 6: Department of Geosciences and Natural Resource Management, University of Copenhagen, Denmark

Orchid Cremastra appendiculata on the path to self-supply with changing fungal companion

Franziska Zahn¹, Yung-I Lee², Gerhard Gebauer¹

1: BayCEER – Laboratory of Isotope Biogeochemistry, University of Bayreuth, Bayreuth, Germany; 2: Biology Department, National Museum of Natural Science, Taichung, Taiwan

Unravelling shoot:root drought responses in VOC emissions through ¹³C-pyruvate labelling

Erik Daber, Philipp Nolte, Jürgen Kreuzwieser, Mirjam Meischner, Christiane Werner

Chair of Ecosystem Physiology, Albert-Ludwigs-University of Freiburg, Germany

Field 15N pool dilution approach to determine gross nitrification rate

C. Florian Stange, Axel Lamparter, Julia Jaquemotte

BGR, Deutschland

Ein ~15 ka δ²H_n-alkane-Record vom Bichlersee, Oberbayern

Maximilian Prochnow¹, Marcel Bliedtner¹, Paul Strobel¹, Michael Zech², Roland Zech¹

1: Physical Geography, Institute of Geography, Friedrich Schiller University Jena, Jena, Germany; 2: Heisenberg Chair of Physical Geography, Institute of Geography, Technische Universität Dresden, Dresden, Germany

Last millennium hydroclimate variability from Lake Höglwörth, Bavaria, Germany

Sudip Acharya¹, Marcel Bliedtner¹, Paul Strobel¹, Josefin Sperling¹, Thomas Kasper¹, Michael Zech², Roland Zech¹

1: Physical Geography, Institute of Geography, Friedrich Schiller University, Jena, Germany; 2: Heisenberg Chair of Physical Geography, Institute of Geography, Technische Universität Dresden, Dresden, Germany

Ca isotope partitioning upon experimental precipitation of carbonated hydroxy-apatite (CHAP)

Nikolaus Gussone¹, Michael Ernst Böttcher², Anika C. Conrad², Iris Schmiedinger², Jens Fiebig³, Markus Peltz⁴, Georg Grathoff⁴, Burkhard C. Schmidt⁵

1: Institut für Mineralogie, Westfälische Wilhelms Universität Münster; 2: Leibniz Institute of Baltic Sea Research and University of Greifswald, Deutschland; 3: Institute of Geosciences, Goethe-University of Frankfurt, Germany, and Senckenberg Biodiversity and Climate Research Center, Frankfurt (Main), Germany; 4: Economic Geology, University of Greifswald, Germany; 5: Department of Experimental and Applied Mineralogy, Georg-August-University of Göttingen, Germany

Stable isotopic and trace elemental fingerprints in carbonate precipitated by modern hard-water creeks of the temperate climate zone

Michael Ernst Böttcher^1,2, Vera Winde^1,3, Jens Bünning¹, Olaf Dellwig¹, Katrin Müller¹, Ulrich Struck⁴, Maria-Theresia Schafmeister⁵, Peter Escher^1,6

1: Leibniz Institute of Baltic Sea Research, FRG; 2: Marine Geochemistry, University of Greifswald, FRG; 3: Present address: Hydroisotop, Schweitenkirchen, FRG; 4: Naturhistorisches Museum, Berlin, FRG; 5: Applied Geology, University of Greifswald, FRG; 6: Ecoandmore, Freiburg, FRG

Identification of paleosols of a Namibian sediment core (WW203303) using pedogenic features, trace fossils and stable isotope compositions

Feiyu Wang¹, Paul Koeniger², Matthias Hinderer¹

1: TU Darmstadt, Deutschland; 2: Federal Institute for Geosciences and Natural Resources, Geozentrum Hannover

Carbon isotope ratio as a measure of photosynthetic water-use efficiency: reconciling a biophysical discrepancy

John Marshall

SLU, Swedish University of Agricultural Sciences

Impact of nutrient and water availability on grassland functioning - achieving a process based understanding across scales

Maren Dubbert¹, Angelika Kübert², Youri Rothfuss³, Christiane Werner²

1: Zalf, Deutschland; 2: Uni Freiburg, Deutschland; 3: FZ Jülich, Deutschland

Application of 2-dimensional stable isotope measurements of methane to constrain sources and sinks in a seasonally stratified freshwater lake

Teresa Einzmann¹, Moritz Schroll¹, Jan F. Kleint^1,2, Thomas Klintzsch^1,3, Frank Keppler^1,4, Markus Greule¹

1: Institute of Earth Sciences, Heidelberg University, Heidelberg, Germany; 2: MARUM – Center for Marine Environmental Sciences and Department of Geosciences, University of Bremen, Bremen, Germany; 3: Institute for Plant Nutrition, Justus Liebig University, Giessen, Germany; 4: Heidelberg Center for the Environment (HCE), Heidelberg University, Heidelberg, Germany

Belowground C allocation of tropical rainforests in response to drought: an ecosystem ¹³CO₂ labeling approach

lingling shi¹, Pratiksha Acharya¹, Xujuan Bai¹, Niklas Schmuecker¹, Nemiah Ladd², Christiane Werner², Laura.K Meredith^3,4, Michaela Dippold¹

1: Biogeochemistry of Agroecosystems, Department of Crop Science, Faculty of Agriculture, Georg August University of Göttingen; 2: Ecosystem Physiology, University of Freiburg, Freiburg, Germany; 3: School of Natural Resources and the Environment, University of Arizona, Tucson, United States of America; 4: Biosphere 2, University of Arizona, Tucson, United States of America

Stable isotopes for planetary health: Synthetic methionine

Cajetan Neubauer

University of Colorado Boulder, USA

Carbon isotope ratios of endogenous steroids found in human serum – method development, validation, and reference population-derived thresholds

Thomas Piper, Hans Geyer, Mario Thevis

Deutsche Sporthochschule Köln, Deutschland

Making plant methane formation visible – the effect of light exposure and light intensity on plant methane formation by application of ¹³C-labelled dimethyl sulfoxide

Moritz Schroll¹, Katharina Lenhart^2,3, Steffen Greiner³, Frank Keppler^1,4

1: Heidelberg University, Heidelberg, Germany; 2: Bingen University of Applied Sciences, Bingen, Germany; 3: Center for Organismal Studies, Heidelberg, Germany; 4: Heidelberg Center for the Environment, Heidelberg University, Germany

Geographical provenance determination of wood through combination of isotope ratios

Jana C. Köhne¹, Bernd Degen¹, Anette Goeske²

1: Thünen-Institut für Forstgenetik, Deutschland; 2: Thünen-Institut für Agrarklimaschutz, Deutschland

Using in-situ and destructive measurements of stable water isotopes to quantify ecohydrological feedback processes of different forest stands

Judith Mach, Laura Kinzinger, Stefan Seeger, Fabian Fritz, Paula Hilgert, Markus Weiler, Maren Dubbert, Christiane Werner, Natalie Orlowski

Albert-Ludwigs-Universität Freiburg, Professur für Hydrologie, Deutschland

Antibiotics increase methane production rates in freshwater sediments: Evidence from an anaerobic incubation

Eric Bollinger^1,2, Jochen P Zubrod^1,2, Sabine Filker³, Andreas Lorke¹, Mirco Bundschuh^1,2,4

1: iES Landau, Institute for Environmental Sciences, University of Koblenz-Landau; 2: Eusserthal Ecosystem Research Station, University of Koblenz-Landau; 3: Department of Molecular Ecology, University of Technology Kaiserslautern; 4: Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences

Exploring fundamentals of quantitative ¹³CO₂/12CO₂ tracer studies of CO₂ exchange and biomass in plants: assessment of system performance and determination of isotopic end-members for mixing model

Jianjun Zhu, Juan C. Baca Cabrera, Regina T. Hirl, Hans Schnyder, Rudi Schäufele

Technical University of Munich, Deutschland

Unravelling the diet of extinct cave bears in Romania using δ¹⁵N isotopic analysis of amino acids

Peter Tung^1,2, Herve Bocherens^1,2, Dorothee Drucker^1,2, Yuichi Naito^1,3

1: Senckenberg Gesellschaft für Naturforschung, Deutschland; 2: Universität Tübingen, Deutschland; 3: Nagoya University Museum, Japan

Development of an open-split-based dual-inlet system for mass spectrometers

Stephan Räss^1,2, Markus Leuenberger^1,2

1: Universität Bern, Schweiz; 2: Oeschger Centre for Climate Change Research

Tracing nitrogen transformations induced by ¹⁵N labelled cattle slurry applied with different techniques in winter wheat

Caroline Buchen-Tschiskale, Heinz Flessa, Reinhard Well

Thünen-Institut für Agrarklimaschutz, Deutschland

Applying the ¹⁵N gas flux method in a lab incubation as an alternative to laborious field studies

Björn Kemmann¹, Reinhard Well¹, Stefan Burkart¹, Thorsten Ruf², Christoph Emmerling²

1: Thünen Institut für Agrarklimaschutz, Deutschland; 2: Universität Trier, Raum- und Umweltwissenschaften, Bodenkunde, Deutschland

Die Tritiumverteilung in Niederschlag und Oberflächenwasser in Deutschland – ein Beitrag zum deutschen Isotopennetzwerk

Axel Schmidt, Michael Engel, Rike Völpel, Lars Duester

Bundesanstalt für Gewässerkunde, Deutschland

Tritium in der südlichen Nordsee: ein Tracer für lokal gebildeten Wasserdampf

Jürgen Sültenfuß

Universität Bremen, Deutschland

Distribution of young groundwater in the North German Basin

Annika Desens, Georg Houben

BGR, Deutschland

Stable isotope patterns of German rivers with aspects of scales and continuity

Paul Königer¹, Christine Stumpp^2,3, Axel Schmidt⁴

1: Groundwater Resources Quality and Dynamics, Federal Institute for Geosciences and Natural Resources (BGR), Hannover, Germany; 2: Institute for Soil Physics and Rural Water Management, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria; 3: Institute of Groundwater Ecology, Helmholtz Zentrum München, Neuherberg (HMGU), Germany; 4: Environmental Radioactivity and Monitoring, Federal Institute of Hydrology (BfG), Koblenz, Germany

Very high resolution Automated Rain Water Sampler for stable water isotope monitoring

Christoff Andermann, Torsten Queißer, Markus Reich, Oliver Rach, Niels Hovius, Dirk Sachse

GFZ Potsdam, Deutschland

GIN and beyond: Cumulative rain collectors for isotope studies in challenging climates

Nils Michelsen¹, Zeneb Najmi¹, Paul Königer^1,2, Christoph Schüth¹

1: Institute of Applied Geosciences, Technical University of Darmstadt, Germany; 2: BGR Bundesanstalt für Geowissenschaften und Rohstoffe, Hannover, Germany