Please cite this data set as:

Inoue, H.Y., M. Ischii. 2008. Measurements of the partial pressure of CO2 in 
near-surface seawater and in marine boundary air onboard the R/V Sogen Maru during 
the 1991 cruise: MRI database. http://cdiac.ornl.gov/ftp/oceans/MRI_1968_2003/Sogen_Maru/. 
Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, US Department 
of Energy, Oak Ridge, Tennessee. doi: 10.3334/CDIAC/otg.VOS_SM_1991
