P.H. Santschi, D.R. Schink, O. Corapcioglu, S. Oktay-Marshall, U. Fehn, P. Sharma

Deep-Sea Research 43 (1996) 259-265

Two ¹²⁹I profiles from the Middle Atlantic Bight were measured. Near-surface values of ¹²⁹I/ ¹²⁷I were as high as 100 x 10^-12, subsurface values peaked at 1000-1500 m depth (reaching 55 x 10^-12) and showed a steady increase below 2000 m (reaching 80 x 10^-12129I increase below 2000 m water depth is attributed to the Deep Western Boundary Current (DWBC), and the minor maximum at 1000-1500 m is due to the Labrador Sea Water. However, while the F-11 maximum at the shallower depth was more pronounced than the deeper concentration increase, the opposite was true for ¹²⁹I, in agreement with the expectation that the source region of the DWBC in the Greenland Sea is more directly connected to the ¹²⁹I enriched North Sea water than is the Labrador Sea.