TY - JOUR A1 - Assonov, S. S. A1 - Brenninkmeijer, C. A. M. A1 - Jöckel, P. A1 - Mulvaney, R. A1 - Bernard, S. A1 - Chappellaz, J. T1 - Evidence for a CO increase in the SH during the 20th century based on firn air samples from Berkner Island, Antarctica JO - Atmos. Chem. Phys. J1 - ACP VL - 7 IS - 2 SP - 295 EP - 308 Y1 - 2007/01/19 PB - Copernicus Publications SN - 1680-7316 UR - http://www.atmos-chem-phys.net/7/295/2007/ L1 - http://www.atmos-chem-phys.net/7/295/2007/acp-7-295-2007.pdf ER -