Marine reservoir correction for the Cocos (Keeling) Islands, Indian Ocean
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Date
2004
Journal Title
Journal ISSN
Volume Title
Publisher
Cambridge University Press
Abstract
Known-age corals from the Cocos (Keeling) Islands, Indian Ocean, have been analyzed by accelerator mass spectrometry (AMS) for radiocarbon to determine marine reservoir age corrections. The ΔR value for the Cocos (Keeling) Islands is 66 ± 12 yr based on the analyses undertaken for this study. When our AMS and previously published dates for Cocos are averaged, they yield a ΔR of 64 ± 15 yr. This is a significant revision of an earlier estimate of the ΔR value for the Cocos (Keeling) Islands of 186 ± 66 yr (Toggweiler et al. 1991). The (revised) lower ΔR for the Cocos (Keeling) Islands is consistent with GEOSECS 14C data for the Indian Ocean, and previously published bomb 14C data for the Red Sea, Gulf of Aden, and Cocos Islands. The revised ΔR is also close to values for the eastern Indian Ocean and adjacent seas. These suggest surface waters that reach the Cocos Islands might be partly derived from the far western Pacific, via the Indonesian throughflow, and might not be influenced by the southeast flow from the Arabian Sea.
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Description
Volume 46, Issue 2 of Radiocarbon is a special issue, Proceedings of the 18th International Radiocarbon Conference (Part 2 of 2), Conference Editors: Nancy Beavan Athfield, Rodger J Spark. The Radiocarbon archive is freely available - All issues published before 2012 are free to access.
Keywords
Corals, Surface waters, Mass spectroscopy, Carbon 14, Indian Ocean, Islands
Citation
Hua, Q., Woodroffe, C., Barbetti, M., Smithers, S., Zoppi, U., & Fink, D. (2004). Marine reservoir correction for the Cocos (Keeling) Islands, Indian Ocean. Paper presented at the 18th International Radiocarbon Conference, Wellington, New Zealand, September 1-5, 2003. In Radiocarbon, 46(2), 603-610. doi:10.1017/S0033822200035645