ProvenanceData are from: Muller-Karger, F. E., L. Lorenzoni and Y. M. Astor. 2012. Carbon Dioxide, Hydrographic
and Chemical Data Measured during the CARIACO Time-Series Cruises.
http://cdiac.ornl.gov/ftp/oceans/CARIACO_TS/. Carbon Dioxide
Information Analysis Center, Oak Ridge National Laboratory, US Department of
Energy, Oak Ridge, Tennessee. doi: 10.3334/CDIAC/OTG.CARIACO_TS.