A Marine Reservoir Correction Database and On-Line Interface

Calibration is essential for interpretation of radiocarbon dates, especially when the 14 C dates are compared to historical or climatic records with a different chronological basis. 14 C ages of samples from the marine environment, such as shells or fish bones, or samples with a marine component, such as human bone in coastal regions, require an additional consideration because of the reservoir age of the ocean. While the pre-industrial global mean reservoir correction, R(t), is about 400 years, local variations (ΔR) can be several hundred years or more. ΔR compilations on a global scale have been undertaken previously (Stuiver et al. 1986; Stuiver and Braziunas 1993), but have not been updated recently. Here we describe an on-line reservoir correction database accessed via mapping software. Rather than publishing a static ΔR compilation, new data will be incorporated when it becomes available. The on-line marine reservoir correction database can be accessed at the website http://www.calib.org/ .