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. J1 - ACP VL - 7 IS - 8 SP - 2119 EP - 2139 Y1 - 2007/05/02 PB - Copernicus Publications SN - 1680-7324 UR - https://acp.copernicus.org/articles/7/2119/2007/ L1 - https://acp.copernicus.org/articles/7/2119/2007/acp-7-2119-2007.pdf DO - 10.5194/acp-7-2119-2007 ER -