Radiocarbon in corals from the Cocos (Keeling) Islands and implications for Indian Ocean circulation

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dc.contributor.authorHua, Qen_AU
dc.contributor.authorWoodroffe, CDen_AU
dc.contributor.authorSmithers, SGen_AU
dc.contributor.authorBarbetti, Men_AU
dc.contributor.authorFink, Den_AU
dc.date.accessioned2021-07-30T05:24:39Zen_AU
dc.date.available2021-07-30T05:24:39Zen_AU
dc.date.issued2005-11-02en_AU
dc.date.statistics2021-07-15en_AU
dc.description.abstractAnnual bands of a Porites coral from the Cocos (Keeling) Islands, eastern Indian Ocean, were analysed by radiocarbon for 1955–1985 AD. A rapid oceanic response of the site to bomb 14C is found, with a maximum Δ14C value of 132‰ in 1975. This value is considerably higher than those for the northwestern Indian Ocean, suggesting that surface waters reaching Cocos are not derived from the Arabian Sea. Instead, Δ14C values for Cocos and those for Watamu (Kenya) agree well over most of the study interval, suggesting that the South Equatorial Current carries 14C-elevated water rather than 14C-depleted water westward across the Indian Ocean. This implies that oceanic upwelling in the northwestern Indian Ocean is spatially confined with little contribution to the upper limb of the global thermohaline circulation. © 2005 by the American Geophysical Union.en_AU
dc.identifier.articlenumberL21602en_AU
dc.identifier.citationHua, Q., Woodroffe, C. D., Smithers, S. G., Barbetti, M., and Fink, D. (2005), Radiocarbon in corals from the Cocos (Keeling) Islands and implications for Indian Ocean circulation, Geophysical Research Letters, 32, L21602, doi:10.1029/2005GL023882.en_AU
dc.identifier.issn1944-8007en_AU
dc.identifier.journaltitleGeophysical Research Lettersen_AU
dc.identifier.urihttps://doi.org/10.1029/2005GL023882en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11192en_AU
dc.identifier.volume32en_AU
dc.language.isoenen_AU
dc.publisherAmerican Geophysical Union (AGU)en_AU
dc.subjectCoralsen_AU
dc.subjectIslandsen_AU
dc.subjectIndian Oceanen_AU
dc.subjectArabian Seaen_AU
dc.subjectWater currentsen_AU
dc.subjectCarbon 14en_AU
dc.titleRadiocarbon in corals from the Cocos (Keeling) Islands and implications for Indian Ocean circulationen_AU
dc.typeJournal Articleen_AU
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