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Hmiel, B.; Petrenko, V. V.; Dyonisius, M. N.; Buizert, C.; Smith, A. M.; Place, P. F.; Harth, C.; Beaudette, R.; Hua, Q.; Yang, B.; Vimont, I.; Michel, S. E.; Severinghaus, J. P.; Etheridge, D.; Bromley, T.; Schmitt, J.; Fain, X.; Weiss, R. F.; Dlugokencky, E. (2020). Preindustrial 14CH4 indicates greater anthropogenic fossil CH4 emissions. Nature, 578(7795), pp. 409-412. Springer Nature 10.1038/s41586-020-1991-8
Sapart, C. J.; Martinerie, P.; Witrant, E.; Chappellaz, J.; van de Wal, R. S. W.; Sperlich, P.; van der Veen, C.; Bernard, S.; Sturges, W. T.; Blunier, T.; Schwander, Jakob; Etheridge, D.; Röckmann, T. (2013). Can the carbon isotopic composition of methane be reconstructed from multi-site firn air measurements? Atmospheric chemistry and physics, 13(14), pp. 6993-7005. European Geosciences Union 10.5194/acp-13-6993-2013
