TY - JOUR A1 - Köhler, P. A1 - Schmitt, J. A1 - Fischer, H. T1 - On the application and interpretation of Keeling plots in paleo climate research – deciphering δ13C of atmospheric CO2 measured in ice cores JO - Biogeosciences Discuss. J1 - BGD VL - 3 IS - 3 SP - 513 EP - 573 Y1 - 2006/06/14 PB - Copernicus Publications SN - 1810-6277 UR - http://www.biogeosciences-discuss.net/3/513/2006/ L1 - http://www.biogeosciences-discuss.net/3/513/2006/bgd-3-513-2006.pdf ER -