Computer Science
Scientific paper
Sep 1971
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971gecoa..35..891w&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 35, Issue 9, pp.891-902
Computer Science
6
Scientific paper
The isotopic composition of total dissolved inorganic carbon in seawater was determined as a function of time of day in coral reef environments at Saipan, Abaiang Atoll, Tahiti, Florida and Heron Island on the Great Barrier Reef of Australia. At each locality water collected during the day was enriched in 13 C with respect to water collected at night. The form and magnitude of the diurnal cycles is dependent upon the ratio of local biomass to local water mass and on the degree of exchange between local water mass and the open ocean reservoir. Comparison of open and closed system models is made using computer generated 13 C vs. time curves to illustrate modulation by the tidal cycle of the simple diurnal variation in a closed system. The results are of geochemical significance in that the 13 C of CaCO 3 precipitated in certain environments is dependent on the time of crystallization. This must be taken into account in isotope ratio studies of both plant and animal secreted carbonates which are preferentially precipitated during certain periods of the day.
Weber Jon N.
Woodhead Peter M. J.
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