129I and 137Cs tracer measurements in the Arctic Ocean

Simulating transport of 129I and idealized tracers in the northern North Atlantic Ocean

“…Gascard et al [19] estimated that roughly one half of the 129 I burden initially carried by the NCC is lost to the NwAC at about 70 • N. In the Arctic Ocean, 129 I can be seen as Atlantic derived waters, where a pronounced front is found between waters of Pacific and Atlantic origin. This is because the 129 I concentrations are more than an order of magnitude higher in Atlantic waters [41,42]. Going deeper, the Pacific-Atlantic front is observed further into the Canada basin, in line with the observed distribution of intermediate Atlantic Waters (e.g.…”

Circulation features in the central Arctic Ocean revealed by nuclear fuel reprocessing tracers from Scientific Ice Expeditions 1995 and 1996

“…Iodine 129 analyses were performed on the 1 L samples by accelerator mass spectrometry [Kilius et al, 1992[Kilius et al, , 1994Smith et al, 1998] at the IsoTrace Laboratory at the University of Toronto. The sample data were normalized to IsoTrace Reference Material 2 (]29I/]27I = 1.174 X 10 -11 atom ratio).…”

The dissolved organic iodine species of the isotopic ratio of 129I/127I: A novel tool for tracing terrestrial organic carbon in the estuarine surface waters of Galveston Bay, Texas

“…data unref. ), leading to the use of 129 I concentrations to trace the movement of oceanic water masses in the Atlantic Bight (Santschi et al 1996), the Gulf of Mexico , and the Arctic ocean Carmack et al 1997;Smith et al 1998;Edmonds et al 1998;Raisbeck and Yiou 1999;Cooper et al 2001;Yiou et al 2002). Artificial 129 I originates primarily from gaseous waste products released by nuclear fuel reprocessing plants in , and David Elmore I ratios were used to trace terrestrial organic carbon (tDOC) across an estuary because (1) iodine is biophilic, up to 75% of total iodine in fresh and coastal marine waters partitions into organic iodine; (2) 129 I/ 127 I ratios in tDOC are greatly elevated over those from marine systems because atmospheric emissions of 129 I from European nuclear fuel reprocessing facilities were mixed more quickly in the surface ocean, up to 500 m in a decade, than the terrestrial system, which mixed approximately 10 cm in 10 to 50 y; and (3) the oceanic contribution of 127 I (50 to 65 ppb) to the ratio has a greater dilution effect than 127 I from freshwater (0.5 to 40 ppb).…”