Articles | Volume 17, issue 12
https://doi.org/10.5194/essd-17-6889-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/essd-17-6889-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Data description paper
| 
08 Dec 2025
Data description paper |
| 08 Dec 2025
| 08 Dec 2025
Global inventory of doubly substituted isotopologues of methane (Δ13CH3D and Δ12CH2D2)
Sara M. Defratyka
CORRESPONDING AUTHOR
School of GeoSciences, University of Edinburgh, Edinburgh, UK
National Physical Laboratory, Hampton Road, London, UK
Julianne M. Fernandez
Department of Geology, University of Maryland, College Park, Maryland, MD 20742, USA
now at: Global Monitoring Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80305, USA
Getachew A. Adnew
Terrestrial Ecosystem Analysis Group, Institute of Geography, People and Processes, Department of Geosciences and Resource management, Science Faculty, University of Copenhagen, Øster Voldgade 10 1350 Copenhagen K, Denmark
Guannan Dong
Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA
Peter M. J. Douglas
Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, USA
Daniel L. Eldridge
Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
Giuseppe Etiope
Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma 2, Rome, Italy
Faculty of Environmental Science and Engineering, Babes-Bolyai University, Cluj-Napoca, Romania
Thomas Giunta
Geo-Ocean (UMR6538), University Brest, CNRS, Ifremer, Plouzané, France
Mojhgan A. Haghnegahdar
Department of Geology, University of Maryland, College Park, Maryland, MD 20742, USA
Alexander N. Hristov
Department of Animal Science, The Pennsylvania State University, Pennsylvania, PA 16803, USA
Nicole Hultquist
Department of Geology, University of Maryland, College Park, Maryland, MD 20742, USA
Iñaki Vadillo
Department of Geology, Faculty of Science, University of Malaga, Malaga, Spain
Josue Jautzy
Geological Survey of Canada – Natural Resources Canada, Ottawa, Canada
Ji-Hyun Kim
Marine Geology & Energy Division, Korea Institute of Geoscience and Mineral Resources, Daejeon, South Korea
Jabrane Labidi
Université de Paris, Institut de Physique du Globe de Paris, CNRS, 75005 Paris, France
Ellen Lalk
Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139, USA
now at: U.S. Geological Survey, Woods Hole Coastal and Marine Science Center, Woods Hole, MA 02543, USA
Wil Leavitt
Department of Geology & Geophysics, University of Utah, Salt Lake City, UT 84112, USA
Department of Earth Sciences, Dartmouth College, Hanover, NH 03755, USA
Department of Chemistry, Dartmouth College, Hanover, NH 03755, USA
Jiawen Li
Department of Earth Sciences, Dartmouth College, Hanover, NH 03755, USA
Li-Hung Lin
Department of Geosciences, National Taiwan University, Taipei 106, Taiwan
Jiarui Liu
Marine Science Institute, University of California, Santa Barbara, California 93106, USA
Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, California 90095, USA
Lucía Ojeda
Department of Geology, Faculty of Science, University of Malaga, Malaga, Spain
Shuhei Ono
Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139, USA
Jeemin H. Rhim
Department of Ecology, Evolution, and Marine Biology University of California, Santa Barbara, CA 93117, USA
Thomas Röckmann
Institute for Marine and Atmospheric research Utrecht (IMAU), Utrecht University, Utrecht, the Netherlands
Barbara Sherwood Lollar
Department of Earth Sciences, 22 Ursula Franklin St. University of Toronto, Toronto, ON M5S 3B1, Canada
Malavika Sivan
Institute for Marine and Atmospheric research Utrecht (IMAU), Utrecht University, Utrecht, the Netherlands
Jiayang Sun
Department of Geology, University of Maryland, College Park, Maryland, MD 20742, USA
Air Resources Laboratory, National Oceanic and Atmospheric Administration, College Park, Maryland 20740, USA
Gregory T. Ventura
Department of Geology, Saint Mary's University, Halifax, NS B3H 3C3, Canada
David T. Wang
Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139, USA
now at: U.S. Department of Energy, 1000 Independence Ave SW, Washington, DC 20585, USA
Edward D. Young
Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, California 90095, USA
Naizhong Zhang
Laboratory for Air Pollution/Environmental Technology, Empa, 8600 Dübendorf, Switzerland
Tim Arnold
Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden
School of GeoSciences, University of Edinburgh, Edinburgh, UK
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Short summary
Measurement of methane’s doubly substituted isotopologues at natural abundances holds promise for better constraining the Earth’s atmospheric CH4 budget. We compiled 1475 measurements from field samples and laboratory experiments, conducted since 2014, to facilitate the differentiation of CH4 formation pathways and processes, to identify existing gaps limiting application of Δ13CH3D and Δ12CH2D2, and to develop isotope ratio source signature inputs for global CH4 flux modelling.
Measurement of methane’s doubly substituted isotopologues at natural abundances holds promise...
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