IPCC AR6 Methane GWP Tables

Provided below are the IPCC Sixth Assessment Report (AR6) Global Warming Potential (GWP) values for methane (CH₄), including both fossil and biogenic sources. The tables present GWP values over 20- and 100-year time horizons, with and without climate-carbon feedback. These updated metrics reflect the latest climate science and are essential for converting methane emissions to carbon dioxide equivalents (CO₂e) in greenhouse gas inventories and climate reporting. The AR6 GWPs are recommended for use in national reporting and by organizations seeking to align with current scientific standards.

References

Intergovernmental Panel on Climate Change (IPCC). (2021). Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change [Masson-Delmotte, V., P. Zhai, A. Pirani, S. L. Connors, C. Péan, S. Berger, N. Caud, Y. Chen, L. Goldfarb, M. I. Gomis, M. Huang, K. Leitzell, E. Lonnoy, J. B. R. Matthews, T. K. Maycock, T. Waterfield, O. Yelekçi, R. Yu, and B. Zhou (eds.)]. Cambridge University Press. doi:10.1017/9781009157896.

Intergovernmental Panel on Climate Change (IPCC). (2022). Climate Change 2022: Mitigation of Climate Change. Contribution of Working Group III to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change [Shukla, P. R., J. Skea, R. Slade, A. Al Khourdajie, R. van Diemen, D. McCollum, M. Pathak, S. Some, P. Vyas, R. Fradera, M. Belkacemi, A. Hasija, G. Lisboa, S. Luz, and J. Malley (eds.)]. Cambridge University Press. doi:10.1017/9781009157926.