Dissolved inorganic carbon (DIC), total alkalinity, pH on total scale, temperature, salinity, oxygen, nutrients and other measurements collected from profile and discrete sample observations during the R/V Keifu Maru II cruise KS12-04 Repeat Section P03W (EXPOCODE 49UF20120429) in the North Pacific Ocean from 2012-04-29 to 2012-05-30 (NCEI Accession 0186236)