Abstract
The total carbon dioxide in sea water was determined by means of the micro-diffusion method on the cruises of JEDS-3 and JEDS-4. It was confirmed that the total carbon dioxide to AOU plots gave a straight line with a slope ΔC/ΔO2 of about 106/272 in atoms for the waters for which the phosphate to AOU plots gave a straight line with a slope ΔP/ΔO2 of 1/272. Nearly the same ratio as above was also found ind the Antarctic Circumpolar Water. The significance of the reserved total carbon dioxide was pointed out.