Articles | Volume 26, issue 15
https://doi.org/10.5194/acp-26-11421-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-26-11421-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
13 Aug 2026
Research article |
| 13 Aug 2026
| 13 Aug 2026
Using high frequency observations of δ13C-CH4 and δ2H-CH4 and uncertain regional isotopic signatures to estimate sources of UK methane emissions
Alice E. Ramsden
CORRESPONDING AUTHOR
Met Office Hadley Centre, Exeter, UK
School of Geographical Sciences, University of Bristol, Bristol, UK
Anita L. Ganesan
School of Geographical Sciences, University of Bristol, Bristol, UK
Matthew Rigby
School of Chemistry, University of Bristol, Bristol, UK
Chris Rennick
National Physical Laboratory, Teddington, UK
Tim Arnold
Department of Earth and Environmental Sciences, Lund University, Lund, Sweden
School of Geosciences, University of Edinburgh, Edinburgh, UK
Emmal Safi
National Physical Laboratory, Teddington, UK
Edward Chung
National Physical Laboratory, Teddington, UK
Dafina Kikaj
National Physical Laboratory, Teddington, UK
Cameron Yeo
National Physical Laboratory, Teddington, UK
School of Geographical Sciences, University of Bristol, Bristol, UK
Dave Lowry
Department of Earth Sciences, Royal Holloway, University of London, Egham, UK
Pete Levy
Centre of Ecology and Hydrology, Penicuik, UK
Simon O'Doherty
School of Chemistry, University of Bristol, Bristol, UK
Kieran M. Stanley
School of Chemistry, University of Bristol, Bristol, UK
Dickon Young
School of Chemistry, University of Bristol, Bristol, UK
School of Chemistry, University of Bristol, Bristol, UK
Damien Martin
School of Physics, Ryan Institute's Centre for Climate and Air Pollution Studies, National University of Ireland Galway, Galway, Ireland
Morgan Lopez
Laboratoire des Sciences du Climat et de l'Environnement (LSCE-IPSL), CEA-CNRS-UVSQ, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
Michel Ramonet
Laboratoire des Sciences du Climat et de l'Environnement (LSCE-IPSL), CEA-CNRS-UVSQ, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
Grant L. Forster
Centre for Ocean and Atmospheric Sciences, School of Environmental Sciences, University of East Anglia, Norwich, UK
National Centre for Atmospheric Sciences, University of East Anglia, Norwich, UK
Arnoud Frumau
Netherlands Organisation for Applied Scientific Research (TNO), Petten, 1755 LE, the Netherlands
Alistair J. Manning
Met Office Hadley Centre, Exeter, UK
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Short summary
Methane is emitted from a range of anthropogenic and natural sources, each with a characteristic isotope ratio signature. We present a method for estimating emissions from multiple sources using isotopic signatures and observations of atmospheric methane isotope ratios. We show the importance of considering isotopic signature uncertainty and demonstrate how our current understanding of these signatures may be limiting this method’s ability to reduce uncertainties in emissions estimates.
Methane is emitted from a range of anthropogenic and natural sources, each with a characteristic...
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