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Abstract
Previous determinations of the deuterium-hydrogen ratios in natural waters revealed the fractionation of deuterium; a fractionation resulting from differences in the vapor pressure of H2O and HDO. Measurements of the deuterium in sea, rain, and condensate waters of Hawaii, are reported here. These results show a concentration of deuterium in sea-surface waters, and an inverse relationship of D with altitude in rain and condensate taken on a mountain side. The possible significance of these measurements for cloud physics studies is briefly discussed.