Titel:
Titel:
Global inventory of doubly substituted isotopologues of methane (Δ13CH3D and Δ12CH2D2)
Autoren:
Autoren:
Defratyka, Sara, University of Edinburgh, Edinburgh, UK, ORCID: 0000-0002-9488-4518
Fernandez, Julianne, University of Maryland, College Park, Maryland, USA
Adnew, Getachew, University of Copenhagen, Copenhagen, DENMARK, ORCID: 0000-0002-1999-5664
Dong, Guannan, California Institute of Technology, Pasadena, USA
Douglas, Peter, McGill University, Montreal, QC, CANADA, ORCID: 0000-0002-4282-6615

Alle Autoren anzeigen (32)
Beitragende:
Beitragende:
HostingInstitution: Physikalisch-Technische Bundesanstalt (PTB), ISNI: 0000 0001 2186 1887
Seiten:
Seiten:
30
Sprachen:
Sprachen:
en
DOI:
DOI:
10.7795/120.20251126F
Art der Ressource:
Art der Ressource:
PTB: Zeitschriftenartikel, DINI: Article, DataCite: JournalArticle
Verlag:
Verlag:
Copernicus Publications
Rechte:
Rechte:
https://creativecommons.org/licenses/by/4.0/
CC BY 4.0
Beziehungen:
Beziehungen:
IsIdenticalTo: DOI 10.5194/essd-2025-41
IsPartOf: ISSN 1866-3508
Datumsangaben:
Datumsangaben:
Verfügbar: 2025-11-27
Eingereicht: 2025-06-18
Datei:
Datei:
Datei herunterladen (application/pdf) 1.2 MB
MD5 Prüfsumme: 4b98eba975fb095905d6024057980c48
SHA256 Prüfsumme: 619dbc80f55398e870e1f191eba9c2d8f00858555fb56631439db3a8a5d46c92
Stichwörter:
Stichwörter:
Clumped isotopologues ; Methane Sources and Sinks ; Methanogenesis
Zusammenfassung:
Zusammenfassung:
Measurements of methane (CH4) molecules containing two rare isotopes ( 13CH3D and 12CH2D2), also termed doubly substituted or ‘clumped’ isotopologues, have the potential to provide two additional isotopic dimensions to help investigating mechanisms producing the recent global trends and CH4 budget over decadal timescale. In this work, we summarise the current state of research on doubly substituted CH4 isotopologues, with an emphasis on compiling results of all relevant work. The database comprises 1475 records compiled from the literature published until April 2025 (https://dx.doi.org/10.5285/51ae627da5fb41b8a767ee6c653f83e6). For field samples, 40% of records were sourced from natural gas reservoirs, while microbial terrestrial (e.g., agriculture, lake, wetland) samples account only for 12.5%. Lakes samples contribute 75% to collected microbial terrestrial samples. There is limited or no representation of samples coming from significant microbial CH4 sources to the atmosphere, like wetlands, agriculture and landfill. To date, laboratory experiments were mostly focused on microbial (28% of samples from laboratory experiments) and pyrogenic (15%) methanogenesis or anaerobic (16%), and aerobic (8%) CH4 oxidation, and only a single contribution to studies of photochemical oxidation via OH and Cl (5%). The distinct ranges of Δ 13CH3D and Δ 12CH2D2 values measured in these studies suggests their potential to improve our understanding of atmospheric CH4. This work provides an overview of the major gaps in measurements and identifies where further studies should be focussed to enable the highest immediate impact on understanding global CH4.
Zitat:
Zitat:
Defratyka, S. M., Fernandez, J. M., Adnew, G. A., Dong, G., Douglas, P. M. J., Eldridge, D. L., Etiope, G., Giunta, T., Haghnegahdar, M. A., Hristov, A. N., Hultquist, N., Vadillo, I., Jautzy, J., Kim, J.-H., Labidi, J., Lalk, E., Leavitt, W., Li, J., Lin, L.-H., Liu, J., Ojeda, L., Ono, S., Rhim, J., Röckmann, T., Sherwood Lollar, B., Sivan, M., Sun, J., Ventura, G. T., Wang, D. T., Young, E. D., Zhang, N., and Arnold, T.: Global inventory of doubly substituted isotopologues of methane (Δ13CH3D and Δ12CH2D2), Earth Syst. Sci. Data Discuss. [preprint], https://doi.org/10.5194/essd-2025-41, in review, 2025.
Förderung:
Förderung:
European Commission (EC), ISNI: 0000 0001 2162 673X, Grant Title: Metrology for European emissions verification on methane isotopes (isoMET), Grant Number: EPM 21GRD04

Autoren

Defratyka, Sara, University of Edinburgh, Edinburgh, UK, ORCID: 0000-0002-9488-4518
Fernandez, Julianne, University of Maryland, College Park, Maryland, USA
Adnew, Getachew, University of Copenhagen, Copenhagen, DENMARK, ORCID: 0000-0002-1999-5664
Dong, Guannan, California Institute of Technology, Pasadena, USA
Douglas, Peter, McGill University, Montreal, QC, CANADA, ORCID: 0000-0002-4282-6615
Eldridge, Daniel, Los Alamos National Laboratory, Los Alamos, New Mexico, USA
Etiope, Giuseppe, Babes-Bolyai University, Cluj-Napoca, ROMANIA, ORCID: 0000-0001-8614-4221
Giunta, Thomas, Brest University, Brest, FRANCE
Haghnegahdar, Mojhgan, University of Maryland, College Park, Maryland, USA
Hristov, Alexander, Pennsylvania State University, State College, Pennsylvania, USA
Hultquist, Nicole, University of Maryland, College Park, Maryland, USA
Vadillo, Iñaki, University of Malaga, Malaga, SPAIN, ORCID: 0000-0002-9767-6618
Jautzy, Josue, Geological Survey of Canada, Ottawa, Ontario, CANADA
Kim, Ji-Hyun, Korea Institute of Geoscience and Mineral Resources, Daejeon, SOUTH KOREA
Labidi, Jabrane, Université de Paris, Paris, FRANCE, ORCID: 0000-0002-5656-226X
Lalk, Ellen, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
Leavitt, Wil, University of Utah, Salt Lake City, Utah, USA
Li, Jiawen, Dartmouth College, Hanover, New Hamphire, USA
Lin, Li-Hung, National Taiwan University, Taipei, TAIWAN
Liu, Jiarui, University of California, Santa Barbara, California, USA
Ojeda, Lucia, University of Malaga, Malaga, SPAIN, ORCID: 0000-0003-3677-1395
Ono, Shuhei, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
Rhim, Jeemin, University of California, Santa Barbara, California, USA
Röckmann, Thomas, Utrecht University, Utrecht, THE NETHERLANDS, ORCID: 0000-0002-6688-8968
Sherwood Lollar, Barbara, University of Toronto, Toronto, Ontario, CANADA
Sivan, Malavika, Utrecht University, Utrecht, THE NETHERLANDS
Sun, Jiayang, University of Maryland, College Park, Maryland, USA, ORCID: 0000-0001-9736-8511
Ventura, Gregory, Saint Mary’s University, Halifax, Nova Scotia, CANADA, ORCID: 0009-0001-5217-2758
Wang, David, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
Young, Edward, University of California, Los Angeles, California, USA
Zhang, Naizhong, Swiss Federal Laboratories for Materials Science and Technology (Empa), Dübendorf, SWITZERLAND, ORCID: 0000-0002-0065-8641
Arnold, Tim, Lund University, Lund, SWEDEN, ORCID: 0000-0001-9097-8907

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