TY - JOUR A1 - Lassey, K. R. A1 - Etheridge, D. M. A1 - Lowe, D. C. A1 - Smith, A. M. A1 - Ferretti, D. F. T1 - Centennial evolution of the atmospheric methane budget: what do the carbon isotopes tell us? JO - Atmos. Chem. Phys. Discuss. J1 - ACPD VL - 2006 SP - 4995 EP - 5038 Y1 - 2006/06/21 PB - Copernicus Publications SN - 1680-7375 UR - https://acp.copernicus.org/preprints/6/4995/2006/ L1 - https://acp.copernicus.org/preprints/6/4995/2006/acpd-6-4995-2006.pdf DO - 10.5194/acpd-6-4995-2006 ER -