TY - JOUR A1 - Zuiderweg, A. A1 - Holzinger, R. A1 - Martinerie, P. A1 - Schneider, R. A1 - Kaiser, J. A1 - Witrant, E. A1 - Etheridge, D. A1 - Petrenko, V. A1 - Blunier, T. A1 - Röckmann, T. T1 - Extreme 13C depletion of CCl2F2 in firn air samples from NEEM, Greenland JO - Atmos. Chem. Phys. J1 - ACP VL - 13 IS - 2 SP - 599 EP - 609 Y1 - 2013/01/17 PB - Copernicus Publications SN - 1680-7324 UR - http://www.atmos-chem-phys.net/13/599/2013/ L1 - http://www.atmos-chem-phys.net/13/599/2013/acp-13-599-2013.pdf DO - 10.5194/acp-13-599-2013 ER -