Investigation of the renewed methane growth post-2007 with high-resolution 3-D variational inverse modeling and isotopic constraints

Thanwerdas, Joël; Saunois, Marielle; Berchet, Antoine; Pison, Isabelle; Bousquet, Philippe

doi:https://doi.org/10.5194/acp-24-2129-2024

Articles | Volume 24, issue 4

https://doi.org/10.5194/acp-24-2129-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-24-2129-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 24, issue 4

Research article

|

20 Feb 2024

Research article |

| 20 Feb 2024

Investigation of the renewed methane growth post-2007 with high-resolution 3-D variational inverse modeling and isotopic constraints

Joël Thanwerdas, Marielle Saunois, Antoine Berchet, Isabelle Pison, and Philippe Bousquet

Data sets

Investigation of the post-2007 methane renewed growth with high-resolution 3-D variational inverse modelling and isotopic constraints - Input data J. Thanwerdas https://doi.org/10.5281/zenodo.10390430

Model code and software

The Community Inversion Framework: codes and documentation A. Berchet et al. https://doi.org/10.5281/zenodo.6304912

Short summary

We investigate the causes of the renewed growth of atmospheric methane (CH₄) after 2007 using inverse modeling. We use the additional information provided by observations of CH₄ isotopic compositions to better differentiate between the emission categories. Accounting for the large uncertainties in source signatures, our results suggest that the post-2007 increase in atmospheric CH₄ was caused by similar increases in emissions from (1) fossil fuels and (2) agriculture and waste.