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Measurement report: isotopic composition of CH 4 emitted from gas exploration sites in the Transylvanian Basin, Romania

Isotope measurements are increasingly used to constrain the methane (CH4) budget on various scales, from global to regional. The success of isotope-based source attribution depends to a large degree on the knowledge of the isotope signatures of the various source categories at the point of emission,...

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Autori principali: Röckmann, Thomas (Autore) , Menoud, Malika (Autore) , van Es, Jacoline (Autore) , van der Veen, Carina (Autore) , Maazallahi, Hossein (Autore) , Jagoda, Pawel (Autore) , Necki, Jaroslav M. (Autore) , Bartyzel, Jakub (Autore) , Korbeń, Piotr (Autore) , Defratyka, Sara M. (Autore) , Schmidt, Martina (Autore) , Corbu, Marius (Autore) , Iancu, Sebastian (Autore) , Calcan, Andreea (Autore) , Ardelean, Magdalena (Autore) , Ghemulet, Sorin (Autore) , Pop, Cristian (Autore) , Radovici, Andrei (Autore) , Mereuta, Alexandru (Autore) , Stefanie, Horatiu (Autore) , Baciu, Calin (Autore)
Natura: Article (Journal)
Lingua:inglese
Pubblicazione: 15 January 2026
In: Atmospheric chemistry and physics
Year: 2026, Volume: 26, Fascicolo: 1, Pages: 723-731
ISSN:1680-7324
DOI:10.5194/acp-26-723-2026
Accesso online:Resolving-System, lizenzpflichtig, Volltext: https://doi.org/10.5194/acp-26-723-2026
Verlag, lizenzpflichtig, Volltext: https://acp.copernicus.org/articles/26/723/2026/
Testo
Note sull'autore:Thomas Röckmann, Malika Menoud, Jacoline van Es, Carina van der Veen, Hossein Maazallahi, Pawel Jagoda, Jaroslav M. Necki, Jakub Bartyzel, Piotr Korben, Sara Defratyka, Martina Schmidt, Marius Corbu, Sebastian Iancu, Andreea Calcan, Magdalena Ardelean, Sorin Ghemulet, Cristian Pop, Andrei Radovici, Alexandru Mereuta, Horatiu Stefanie, and Calin Baciu
Descrizione
Riassunto:Isotope measurements are increasingly used to constrain the methane (CH4) budget on various scales, from global to regional. The success of isotope-based source attribution depends to a large degree on the knowledge of the isotope signatures of the various source categories at the point of emission, but this information is in many cases lacking. Here we report the isotopic composition of CH4 emitted from 48 installations in the gas production region of Transylvania, Romania. The isotopic source signatures are quite homogeneous across the basin with average values of δ13C = (−65.6 ± 0.5 ‰) and δD = (−184 ± 1 ‰) confirming the predominantly biogenic origin of the Transylvanian gas, produced by hydrogenotrophic CO2 reduction. This is similar to values reported previously from natural seeps in Transylvania, to the natural gas exploited in the Dolj region in Southwestern Romania, and to the natural gas in the distribution grid in Cluj-Napoca. However, is more depleted in heavy isotopes than the oil-associated gas emitted in the Southern Romanian Plain, and gas leakages in the city of Bucharest. In addition, we present a step-by-step derivation of the underlying “Keeling plot” mass balance approach that is used to derive isotope source signatures.
Descrizione del documento:Im Titel erscheint die 4 tiefgestellt
Gesehen am 13.05.2026
Descrizione fisica:Online Resource
ISSN:1680-7324
DOI:10.5194/acp-26-723-2026

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