title: The role of sea ice in the fate of contaminants in the Arctic Ocean: plutonium atom ratios in the Fram Strait.
abstract: Atom ratios of 240Pu to 239Pu in bottom sediments from the Fram Strait are used to provide evidence for the long distance dispersion of Pu in the Arctic Ocean. In particular, low (<0.18) 240Pu/239Pu ratios indicate that plutonium from sources in the Kara Sea and Novaya Zemlya is transported across the basin toward the North Atlantic. The results have implications for the ability of sea ice to incorporate, intercept, and transport contaminants in the Arctic Ocean. They demonstrate that the fates of sea ice and associated contaminants in the Arctic Ocean are closely coupled, with the release of the particulate load and associated chemical species occurring in principal sea ice ablation areas such as the Fram Strait.
authors: Marine Sciences Research Center, Stony Brook University, Stony Brook, New York 11794-5000, USA. Pere.Masque@uab.es
authors: Pere
authors: P
authors: Masqué
authors: J Kirk
authors: JK
authors: Cochran
authors: Dierk
authors: D
authors: Hebbeln
authors: David J
authors: DJ
authors: Hirschberg
authors: Dirk
authors: D
authors: Dethleff
authors: Amelie
authors: A
authors: Winkler
mesh_terms: D001110:Arctic Regions; D004784:Environmental Monitoring; D019015:Geologic Sediments / Q000737:chemistry; D007053:Ice; D011005:Plutonium / Q000032:analysis*; D012623:Seawater / Q000737:chemistry*; D014872:Water Movements; D014875:Water Pollutants, Radioactive / Q000032:analysis*
chemical_list: D007053:Ice; D014875:Water Pollutants, Radioactive; D011005:Plutonium