Seawater Carbon Data

Early Cruise pCO2 (1957 - 1963)

During the late 1950's and early 1960's, Charles D. Keeling supervised the measurement of pCO2 in surface ocean waters and in the atmosphere just above on a number of seagoing expeditions mounted by Scripps Institution of Oceanography. These expeditions ("cruises"), comprising long transects in the major oceans, were chosen to map the global features of surface ocean pCO2. Data from most of these cruises are presented here for the first time in detail (in the form of hourly averages). The data had been processed soon after the cruises and presented in several research articles as averages, over geographical areas, of the difference in CO2 concentration between ocean and atmosphere (see References). This site contains data from the DOWNWIND cruise in 1957, the MONSOON cruise in 1961, and the long LUSIAD cruise in 1962 and 1963.

Ocean Time-series (1983 - 2017)

Time-series data for inorganic carbon chemistry from discrete bottle samples from surface seawater. Carbon measurements include total dissolved inorganic carbon (DIC), the reduced isotope ratio 13C/12C of DIC (δ13C-DIC), and alkalinity (ALK).