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 Hakuho Maru I during 
the 1968-1988 cruises: MRI database. http://cdiac.ornl.gov/ftp/oceans/MRI_1968_2003/Hakuho_Maru_I/. 
Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, US Department 
of Energy, Oak Ridge, Tennessee. doi: 10.3334/CDIAC/otg.VOS_HM_I_1968-1988
