Saunois, M. et al. Earth System Science Data 12, 1561–1623 (2020).
Riddell-Young, B. et al. Nature Geoscience 16, 1174–1180 (2023).
Chappellaz, J. et al. Journal of Geophysical Research: Atmospheres 102, 15987–15997 (1997).
Mitchell, L., Brook, E., Lee, J. E., Buizert, C., and Sowers, T. Science 342, 964–966 (2013).
Toning, K. W., Ran, X., Crotwell, A. M., and Mand, J. W. Quasi-continuous Measurements of Atmospheric Methane at Barrow, Alaska, and Mauna Loa, Hawaii, 1986 to Present. Version 2025-04-26 (NOAA Earth System Research Laboratories, 2025).
Source: www.nature.com