Articles | Volume 26, issue 16
https://doi.org/10.5194/acp-26-12019-2026
© 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-26-12019-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
24 Aug 2026
Research article |
| 24 Aug 2026
| 24 Aug 2026
Radiocarbon in atmospheric CH4 and CO2 at Jungfraujoch in 2019–2024: influence of regional nuclear emissions and current global atmospheric 14CH4 signal
Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland
Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland
now at: WANNER Expert GmbH, Solothurn, Switzerland
Dylan Geissbühler
Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland
Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland
now at: Institute for Marine and Atmospheric Research Utrecht, Utrecht University, Utrecht, the Netherlands
Stephan Henne
Empa, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
Ryo Fujita
Meteorological Research Institute, Japan Meteorological Agency, Tsukuba, Japan
Heather Graven
Department of Physics, Imperial College London, London, United Kingdom
Christophe Espic
Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland
Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland
now at: MIRO Analytical AG, Wallisellen, Switzerland
Matthias Bantle
Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland
Negar Haghipour
Department of Earth and Planetary Sciences and Laboratory of Ion Beam Physics, ETH Zurich, Zurich, Switzerland
Franz Conen
Department of Environmental Sciences, University of Basel, Basel, Switzerland
Dominik Brunner
Empa, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
Martin Steinbacher
Empa, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
Giulia Zazzeri
Ricerca sul Sistema Energetico – RSE S.p.A., Milan, Italy
Samuel Hammer
Institute of Environmental Physics, Heidelberg University, ICOS-CRL, Heidelberg, Germany
Markus Leuenberger
Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland
Climate and Environmental Physics, University of Bern, Bern, Switzerland
Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Bern, Switzerland
Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland
Data sets
Data: Radiocarbon in atmospheric CH4 and CO2 at Jungfraujoch in 2019–2024: influence of regional nuclear emissions and current global atmospheric 14CH4 signal T Laemmel et al. https://doi.org/10.5281/zenodo.18518087
Short summary
Carbon dioxide and methane are the two main anthropogenic greenhouse gases responsible for current climate change. Beside the measurement of their atmospheric concentration, the analysis of the abundance of their isotope carbon-14 (14C) gives hints about their origin, either biogenic or fossil. Here we present six years of atmospheric 14CH4 and 14CO2 measurements at a high-elevation alpine site in Switzerland (Jungfraujoch) and discuss the observed trends in both local and global views.
Carbon dioxide and methane are the two main anthropogenic greenhouse gases responsible for...
Altmetrics
Final-revised paper
Preprint