Please cite this data set as:

van Heuven, S., S. Ober, and U. Schauer. 2012. Carbon Dioxide, Hydrographic, and Chemical Data 
Obtained During the R/V Polarstern Cruise ARKXXII_2 in the Arctic Ocean (28 July - 10 October, 2007). 
http://cdiac.ornl.gov/ftp/oceans/CLIVAR/ARKXXII_2/. Carbon Dioxide Information Analysis Center, 
Oak Ridge National Laboratory, US Department of Energy, Oak Ridge, Tennessee. 
doi: 10.3334/CDIAC/OTG.CLIVAR_ARKXXII_2