Annual periodicity of the 18 O / 16 O and 13 C / 12 C ratios in the coral Montastrea annularis

Details Annual periodicity of the 18 O / 16 O and 13 C / 12 C ratios in the coral Montastrea annularis Annual periodicity of the 18 O / 16 O and 13 C / 12 C ratios in the coral Montastrea annularis

Jul 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979gecoa..43.1009f&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 43, Issue 7, pp.1009-1020

Computer Science

39

Scientific paper

The isotopic ratios 18 O / 16 O and 13 C / 12 C show an annual periodicity in the coral Montastrea annularis from Bermuda, Jamaica and Barbados. The abundances of 18 O and 13 C are positively correlated in the Jamaica and Barbados samples, but inversely related in the Bermuda sample. Annual high density growth bands are formed during the season of warmest water temperature at all 3 sites and are enriched in 16 O. M. Annularis has a constant displacement from oxygen isotopic equilibrium and accurately records seasonal temperature variations via the temperature-dependent aragonite-water fractionation factor. Light intensity, through the activity of the coral's endosymbiotic algae, regulates the depth-dependent and seasonal variations in the skeletal carbon isotopic composition.

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