?R (Other Keyword)
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Determining local marine reservoir effect ΔR correction factors for Cuba (2017)
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The atmosphere constantly produces radiocarbon, 14C, which dissolves in the oceans as carbon dioxide. Theoretically, radiocarbon concentrations are equilibrated between the atmosphere, hydrosphere, and biosphere. However, in some regions old seawater at the bottom of the oceans returns significantly older radiocarbon dates as water sinks down the water column, causing the isotopic decay of 14C to increase with depth. This creates a delay of ~200-500 years for the atmospheric carbon to be...