3 VERTICAL PROFILES OF DISSOLVED ORGANIC-CARBON IN THE NORTH PACIFIC

Vertical profiles of dissolved organic carbon (DOC) in the North Pacific, as determined by the high-temperature catalytic oxidation (HTCO) method, are reported, as well as results of some analytical examinations. A comparison of calibration of the DOC analyzer, using standard solutions of inorganic and organic compounds, revealed that recoveries of standard organic compounds were less than 100%. The concentrations of DOC in the upper 200 m and below 500 m were, respectively, 148 +/-19 muM C and 113 +/- 8 muM C at a station ai 25-degrees-N and 87.7 +/- 5.2 muM C and 78.2 +/- 7.1 muM C at a station at 45-degrees-N. The correlation between DOC and apparent oxygen utilization (AOU) was very weak or insignificant in intermediate and deep waters.