Survey of artificial radionuclides in the Barents Sea and the Kara Sea

Strand, P.; Никитин, А. И.; Rudjord, Anne Liv; Salbu, Brit; Christensen, G.C.; Føyn, Lars; Kryshev, I.I.; Chumichev, V.B.; Dahlgaard, H.; Holm, E.

doi:10.1016/0265-931x(94)90010-8

Cited by 51 publications

(9 citation statements)

References 2 publications

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“…Among the other species, which were obtained by diving, Desmerestia aculeata shows e highest values with about half the level as observed in Fucus distichus. [22]). The 238 Pu / 239+240 Pu ratio would be 0.056, using the upper limit of the 238 Pu level found.…”

Section: Measurements Techniquesmentioning

confidence: 99%

Radionuclides in the Kongsfjorden area, Svalbard

et al. 2002

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Section: Measurements Techniquesmentioning

confidence: 99%

Radionuclides in the Kongsfjorden area, Svalbard

et al. 2002

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“…In addition to direct fallout from the atmosphere, the Arctic marine environment continues to be contaminated by the oceanic transport of Chernobyl derived 137 Cs from the North Sea and the Baltic Sea, the catchments of which both received considerably greater fallout from Chernobyl than Arctic regions. Calculations based on 134 Cs / 137 Cs ratios in the Kara Sea in 1992, suggested that some 30% of the 137 Cs inventory in the Kara Sea was derived from the Chernobyl accident (Strand et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

Radiocaesium (137Cs) in marine mammals from Svalbard, the Barents Sea and the North Greenland Sea

Andersen

Gwynn

Dowdall

et al. 2006

Science of The Total Environment

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Specific activities of the anthropogenic radionuclide, 137 Cs, were determined in marine mammals from Svalbard and the Barents and North Greenland Seas. Muscle samples were collected from 12 polar bears, 15 ringed seals, 10 hooded seals, 7 bearded seals, 14 harp seals, one walrus, one white whale and one blue whale in the period 2000-2003. The mean concentrations (F SD) of 137 Cs were: 0.72 F 0.62 Bq/kg wet weight (w.w.) for polar bears; 0.49 F 0.07 Bq/kg w.w. for ringed seals; 0.25 F 0.10 Bq/kg w.w. for hooded seals; 0.22 F 0.11 Bq/kg w.w. for bearded seals; 0.36 F 0.13 Bq/kg w.w. for harp seals; 0.67 Bq/kg w.w. for the white whale sample; 0.24 Bq/kg w.w. for the blue whale; and below detection limit for the walrus. Significant differences in 137 Cs specific activities between some of the species were found. Ringed seals had higher specific activities than the other seal species in the study. Bearded seals and hooded seals had similar values, which were both significantly lower than the harp seal values.The results in the present study are consistent with previous reported results, indicating low specific activities of 137 Cs in Arctic marine mammals in the Barents Sea and Greenland Sea region during the last 20 years. The species specific differences found may be explained by varying diet or movement and distribution patterns between species. No age related patterns were found in specific activities for the two species (polar bears and hooded seals) for which sufficient data was available.Concentration factors (CF) of 137 Cs from seawater were determined for polar bears, ringed, bearded, harp and hooded seals. Mean CF values ranged from 79 F 32 (SD) for bearded seals sampled in 2002 to 244 F 36 (SD) for ringed seals sampled in 2003 these CF values are higher than those reported for fish and benthic organisms in the literature, suggesting bioaccumulation of 137 Cs in the marine ecosystem. D

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“…The background levels of radioactivity in the surface waters of the Barents Sea are 4 to 24 Bq/m 3 of 90 Sr and 2 to 4 Bq/m 3 in the vicinity near-bottom concentrations are about 5 Bq/m (Strand et al 1993). Background levels of 137 Cs in fish prior to the Kursk were 1 Bq/kg; post-Kursk levels of radiation, on August 13, 2000, were reported at 0.23 Bq/kg (Bellona 2000).…”

Section: Background Radiationmentioning

confidence: 93%