Variation of O 18 content of waters from natural sources

Details Variation of O 18 content of waters from natural sources Variation of O 18 content of waters from natural sources

Nov 1953

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1953gecoa...4..213e&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 4, Issue 5, pp.213-224

Physics

317

Scientific paper

A number of marine water and fresh water samples were examined for the relative O 18 /O 16 ratio, and the variation of this ratio was determined to a precision of ± 0.1%. In the case of surface marine waters, for a range of salinity of 29.40%., the O 16 content varies over a range of approximately 6%. The low O 18 /O 16 ratios were obtained from surface marine waters contaminated with meltwater from the ice fields, while the marine waters of high salinity were richest in O 18 . The observed relation between O 18 content and salinity of the oceanic waters can be explained by a process of multiple stage distillation which produces a continuous loss of fresh water to the ice regions from the surface waters of the warm oceans. The lower salinities of cold ocean currents, such as the Alaskan and Californian currents, are due primarily to mixing with meltwater from cold regions. The effect of glaciation upon the isotopic method of measuring paleotemperatures is discussed. The results for deep oceanic samples and for non-typical water samples are also discussed.

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