EGU23-13894, updated on 26 Feb 2023
EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Natural methane emissions at high latitudes: A study through the MAGIC2021 measurements campaign

Félix Langot1, Cyril Crevoisier1, Thomas Lauvaux2, Axel Guedj1, Jérôme Pernin1, Antoine Berchet3, Isabelle Pison3, and Sophie Wittig3
Félix Langot et al.
  • 1Laboratoire de Météorologie Dynamique (LMD/IPSL), CNRS, Ecole Polytechnique, 91128 Palaiseau Cedex, France
  • 2Groupe de Spectrométrie Moléculaire Atmosphérique (GSMA), CNRS, Université de Reims-Champagne-Ardenne (URCA), 51100, Reims, France
  • 3Laboratoire des Sciences du Climat et de l’Environnement (LSCE/IPSL), CEA, L’Orme des Merisiers, Paris Saclay 91 191 Gif-sur-Yvette Cedex, France

Methane is a potent greenhouse gas that plays a significant role in the global climate system. High latitude methane is a particularly sensitive subject due to the uncertainty in future gas release due to multiple factors such as the thawing of permafrost and the evolution of wetland cover. Thus, these regions have the potential to significantly contribute to global warming. In this study, we present the results of the MAGIC2021 campaign, which was conducted in Lapland around Kiruna, Sweden in August 2021. The campaign included measurements with atmospheric air sampler AirCores on board weather balloons, three research aircraft equipped with in-situ sensors, and ground-based measurements of gas total columns using EM27/SUNs. We focus here on the combined measurements of 0-30 km profiles by AirCore and by ATR42 research aircraft to investigate sources of methane in the region. To this end, we employed back-trajectory Lagrangian models and conducted an in-depth comparison between model (ERA5, CAMS) and campaign data in a multi-species approach combining CH4, CO2 and CO. Our findings provide insight into the sources and transport of methane at high latitudes. They show that in order to properly study local sources of methane, it is mandatory to account for transported methane originating from regions as far as Northern Canada. Our work also highlights the importance of conducting in situ measurement campaigns like MAGIC2021, which provide valuable data for improving our understanding of atmospheric processes at high latitudes and informing the development of more accurate models and validate satellite retrievals. Plans for next campaigns will also be detailed.

How to cite: Langot, F., Crevoisier, C., Lauvaux, T., Guedj, A., Pernin, J., Berchet, A., Pison, I., and Wittig, S.: Natural methane emissions at high latitudes: A study through the MAGIC2021 measurements campaign, EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-13894,, 2023.