Fig. 1: Schematic figure for BwP age (14C yr).
From: A source-weighted Benthic minus Planktonic radiocarbon method for estimating pure ocean water age
The yellow dot represents a specific site in the deep ocean. The B-A age utilizes the atmospheric and benthic \({{\boldsymbol{\Delta }}}^{{\bf{14}}}{\boldsymbol{C}}\), and the B-P age utilizes the surface and benthic \({{\boldsymbol{\Delta }}}^{{\bf{14}}}{\boldsymbol{C}}\). In general, however, this site is influenced by multiple sources from the sea surface. Each source (e.g., remote \({{\boldsymbol{\Delta }}}^{{\bf{14}}}{{\boldsymbol{C}}}_{{\boldsymbol{p}}{\bf{2}}}\) and \({{\boldsymbol{\Delta }}}^{{\bf{14}}}{{\boldsymbol{C}}}_{{\boldsymbol{p}}{\bf{3}}}\), local \({{\boldsymbol{\Delta }}}^{{\bf{14}}}{{\boldsymbol{C}}}_{{\boldsymbol{p}}{\bf{1}}}\)) takes a different time to reach this site, contributing to the water age there. The BwP age involves the contributions of all these different sources, with the surface \({{\boldsymbol{\Delta }}}^{{\bf{14}}}{\boldsymbol{C}}\) of each source properly weighted by the model dye tracer (\({{\boldsymbol{W}}}_{{\boldsymbol{i}}}\)).
