Please cite this data set as: Olsen, A., K.R. Brown, M. Chierici, T. Johannessen, and C. Neill. 2005. Sea-surface CO2 in the subpolar North Atlantic during the 2005 cruises. http://cdiac.ornl.gov/ftp/oceans/VOS_Nuka_2005_line/. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, US Department of Energy, Oak Ridge, Tennessee. doi: 10.3334/CDIAC/otg.VOS_Nuka_2005_line Available online at http://www.biogeosciences.net/5/535/2008/bg-5-535-2008.html